diff options
| author | Philip Paeps <philip@FreeBSD.org> | 2024-09-06 01:33:05 +0000 |
|---|---|---|
| committer | Philip Paeps <philip@FreeBSD.org> | 2024-09-06 01:33:05 +0000 |
| commit | 62ad5eff805323c79d60cd902863fa8c29b863a8 (patch) | |
| tree | ebfa96a08edb8fb73f77f34625764d0356eacbe2 | |
| parent | 76e31da7ab276bcd66122762d712fb99590f4d3a (diff) | |
Import tzdata 2024bvendor/tzdata/tzdata2024b
| -rw-r--r-- | CONTRIBUTING | 18 | ||||
| -rw-r--r-- | Makefile | 412 | ||||
| -rw-r--r-- | NEWS | 124 | ||||
| -rw-r--r-- | africa | 73 | ||||
| -rw-r--r-- | antarctica | 58 | ||||
| -rw-r--r-- | asia | 442 | ||||
| -rw-r--r-- | australasia | 130 | ||||
| -rw-r--r-- | backward | 15 | ||||
| -rw-r--r-- | backzone | 35 | ||||
| -rw-r--r-- | checknow.awk | 4 | ||||
| -rw-r--r-- | etcetera | 54 | ||||
| -rw-r--r-- | europe | 713 | ||||
| -rw-r--r-- | leap-seconds.list | 30 | ||||
| -rw-r--r-- | leapseconds | 8 | ||||
| -rw-r--r-- | northamerica | 145 | ||||
| -rw-r--r-- | southamerica | 486 | ||||
| -rw-r--r-- | theory.html | 214 | ||||
| -rw-r--r-- | version | 2 | ||||
| -rw-r--r-- | ziguard.awk | 32 | ||||
| -rw-r--r-- | zone.tab | 3 | ||||
| -rw-r--r-- | zone1970.tab | 3 | ||||
| -rw-r--r-- | zonenow.tab | 8 |
22 files changed, 1768 insertions, 1241 deletions
diff --git a/CONTRIBUTING b/CONTRIBUTING index 6d800e4c03a3..f6edbd3be7d3 100644 --- a/CONTRIBUTING +++ b/CONTRIBUTING @@ -23,10 +23,10 @@ such as renaming, adding or removing zones, please read "Theory and pragmatics of the tz code and data" <https://www.iana.org/time-zones/repository/theory.html>. It is also good to browse the mailing list archives -<https://mm.icann.org/pipermail/tz/> for examples of patches that tend -to work well. Additions to data should contain commentary citing -reliable sources as justification. Citations should use "https:" URLs -if available. +<https://lists.iana.org/hyperkitty/list/tz@iana.org/> +for examples of patches that tend to work well. +Changes should contain commentary citing reliable sources. +Citations should use "https:" URLs if available. For changes that fix sensitive security-related bugs, please see the distribution's 'SECURITY' file. @@ -63,12 +63,16 @@ If you use Git the following workflow may be helpful: * Edit source files. Include commentary that justifies the changes by citing reliable sources. - * Debug the changes, e.g.: + * Debug the changes locally, e.g.: - make check - make install + make TOPDIR=$PWD/tz clean check install ./zdump -v America/Los_Angeles + Although builds assume only basic POSIX, they use extra features + if available. 'make check' accesses validator.w3.org unless you + lack 'curl' or use 'make CURL=:'. If you have the latest GCC, + "make CFLAGS='$(GCC_DEBUG_FLAGS)'" does extra checking. + * For each separable change, commit it in the new branch, e.g.: git add northamerica @@ -3,17 +3,17 @@ # 2009-05-17 by Arthur David Olson. # Request POSIX conformance; this must be the first non-comment line. .POSIX: -# On older platforms you may need to scrounge for a POSIX-conforming 'make'. -# For example, on Solaris 10 (2005), use /usr/sfw/bin/gmake or -# /usr/xpg4/bin/make, not /usr/ccs/bin/make. +# On older platforms you may need to scrounge for POSIX conformance. +# For example, on Solaris 10 (2005) with Sun Studio 12 aka Sun C 5.9 (2007), +# use 'PATH=/usr/xpg4/bin:$PATH make CC=c99'. # To affect how this Makefile works, you can run a shell script like this: # # #!/bin/sh -# make CC='gcc -std=gnu11' "$@" +# make CC='gcc -std=gnu23' "$@" # -# This example script is appropriate for a pre-2017 GNU/Linux system -# where a non-default setting is needed to support this package's use of C99. +# This example script is appropriate for a circa 2024 GNU/Linux system +# where a non-default setting enables this package's optional use of C23. # # Alternatively, you can simply edit this Makefile to tailor the following # macro definitions. @@ -53,7 +53,7 @@ DATAFORM= main LOCALTIME= Factory -# The POSIXRULES macro controls interpretation of POSIX-2017.1-like TZ +# The POSIXRULES macro controls interpretation of POSIX-like TZ # settings like TZ='EET-2EEST' that lack DST transition rules. # If POSIXRULES is '-', no template is installed; this is the default. # Any other value for POSIXRULES is obsolete and should not be relied on, as: @@ -132,8 +132,9 @@ LIBDIR = $(TOPDIR)/$(USRDIR)/lib # Types to try, as an alternative to time_t. TIME_T_ALTERNATIVES = $(TIME_T_ALTERNATIVES_HEAD) $(TIME_T_ALTERNATIVES_TAIL) -TIME_T_ALTERNATIVES_HEAD = int_least64_t -TIME_T_ALTERNATIVES_TAIL = int_least32_t uint_least32_t uint_least64_t +TIME_T_ALTERNATIVES_HEAD = int_least64_t.ck +TIME_T_ALTERNATIVES_TAIL = int_least32_t.ck uint_least32_t.ck \ + uint_least64_t.ck # What kind of TZif data files to generate. (TZif is the binary time # zone data format that zic generates; see Internet RFC 8536.) @@ -219,6 +220,7 @@ LDLIBS= # than what POSIX specifies, assuming local time is UT. # For example, N is 252460800 on AmigaOS. # -DHAVE_DECL_ASCTIME_R=0 if <time.h> does not declare asctime_r +# on POSIX platforms predating POSIX.1-2024 # -DHAVE_DECL_ENVIRON if <unistd.h> declares 'environ' # -DHAVE_DECL_TIMEGM=0 if <time.h> does not declare timegm # -DHAVE_DIRECT_H if mkdir needs <direct.h> (MS-Windows) @@ -229,7 +231,7 @@ LDLIBS= # where LDLIBS also needs to contain -lintl on some hosts; # -DHAVE_GETTEXT=0 to avoid using gettext # -DHAVE_INCOMPATIBLE_CTIME_R if your system's time.h declares -# ctime_r and asctime_r incompatibly with the POSIX standard +# ctime_r and asctime_r incompatibly with POSIX.1-2017 and earlier # (Solaris when _POSIX_PTHREAD_SEMANTICS is not defined). # -DHAVE_INTTYPES_H=0 if <inttypes.h> does not work*+ # -DHAVE_LINK=0 if your system lacks a link function @@ -261,8 +263,11 @@ LDLIBS= # -DRESERVE_STD_EXT_IDS if your platform reserves standard identifiers # with external linkage, e.g., applications cannot define 'localtime'. # -Dssize_t=long on hosts like MS-Windows that lack ssize_t -# -DSUPPORT_C89 if the tzcode library should support C89 callers+ -# However, this might trigger latent bugs in C99-or-later callers. +# -DSUPPORT_C89=0 if the tzcode library should not support C89 callers +# Although -DSUPPORT_C89=0 might work around latent bugs in callers, +# it does not conform to POSIX. +# -DSUPPORT_POSIX2008 if the library should support older POSIX callers+ +# However, this might cause problems in POSIX.1-2024-or-later callers. # -DSUPPRESS_TZDIR to not prepend TZDIR to file names; this has # security implications and is not recommended for general use # -DTHREAD_SAFE to make localtime.c thread-safe, as POSIX requires; @@ -274,7 +279,7 @@ LDLIBS= # -DTZ_DOMAINDIR=\"/path\" to use "/path" for gettext directory; # the default is system-supplied, typically "/usr/lib/locale" # -DTZDEFRULESTRING=\",date/time,date/time\" to default to the specified -# DST transitions for POSIX.1-2017-style TZ strings lacking them, +# DST transitions for proleptic format TZ strings lacking them, # in the usual case where POSIXRULES is '-'. If not specified, # TZDEFRULESTRING defaults to US rules for future DST transitions. # This mishandles some past timestamps, as US DST rules have changed. @@ -302,23 +307,25 @@ LDLIBS= # # * Options marked "*" can be omitted if your compiler is C23 compatible. # * Options marked "+" are obsolescent and are planned to be removed -# once the code assumes C99 or later, say in the year 2029. +# once the code assumes C99 or later (say in the year 2029) +# and POSIX.1-2024 or later (say in the year 2034). # # Select instrumentation via "make GCC_INSTRUMENT='whatever'". GCC_INSTRUMENT = \ -fsanitize=undefined -fsanitize-address-use-after-scope \ -fsanitize-undefined-trap-on-error -fstack-protector # Omit -fanalyzer from GCC_DEBUG_FLAGS, as it makes GCC too slow. -GCC_DEBUG_FLAGS = -DGCC_LINT -g3 -O3 -fno-common \ +GCC_DEBUG_FLAGS = -DGCC_LINT -g3 -O3 \ $(GCC_INSTRUMENT) \ -Wall -Wextra \ -Walloc-size-larger-than=100000 -Warray-bounds=2 \ -Wbad-function-cast -Wbidi-chars=any,ucn -Wcast-align=strict -Wdate-time \ -Wdeclaration-after-statement -Wdouble-promotion \ - -Wduplicated-branches -Wduplicated-cond \ + -Wduplicated-branches -Wduplicated-cond -Wflex-array-member-not-at-end \ -Wformat=2 -Wformat-overflow=2 -Wformat-signedness -Wformat-truncation \ -Wimplicit-fallthrough=5 -Winit-self -Wlogical-op \ - -Wmissing-declarations -Wmissing-prototypes -Wnested-externs \ + -Wmissing-declarations -Wmissing-prototypes \ + -Wmissing-variable-declarations -Wnested-externs \ -Wnull-dereference \ -Wold-style-definition -Woverlength-strings -Wpointer-arith \ -Wshadow -Wshift-overflow=2 -Wstrict-overflow \ @@ -327,10 +334,9 @@ GCC_DEBUG_FLAGS = -DGCC_LINT -g3 -O3 -fno-common \ -Wsuggest-attribute=const -Wsuggest-attribute=format \ -Wsuggest-attribute=malloc \ -Wsuggest-attribute=noreturn -Wsuggest-attribute=pure \ - -Wtrampolines -Wundef -Wuninitialized -Wunused-macros -Wuse-after-free=3 \ + -Wtrampolines -Wundef -Wunused-macros -Wuse-after-free=3 \ -Wvariadic-macros -Wvla -Wwrite-strings \ - -Wno-address -Wno-format-nonliteral -Wno-sign-compare \ - -Wno-type-limits + -Wno-format-nonliteral -Wno-sign-compare # # If your system has a "GMT offset" field in its "struct tm"s # (or if you decide to add such a field in your system's "time.h" file), @@ -341,9 +347,8 @@ GCC_DEBUG_FLAGS = -DGCC_LINT -g3 -O3 -fno-common \ # Similarly, if your system has a "zone abbreviation" field, define # -DTM_ZONE=tm_zone # and define NO_TM_ZONE to suppress any guessing. -# Although these two fields are not required by POSIX.1-2017, -# POSIX 202x/D4 requires them and they are widely available -# on GNU/Linux and BSD systems. +# Although POSIX.1-2024 requires these fields and they are widely available +# on GNU/Linux and BSD systems, some older systems lack them. # # The next batch of options control support for external variables # exported by tzcode. In practice these variables are less useful @@ -353,7 +358,9 @@ GCC_DEBUG_FLAGS = -DGCC_LINT -g3 -O3 -fno-common \ # # -DHAVE_TZNAME=0 # do not support "tzname" # # -DHAVE_TZNAME=1 # support "tzname", which is defined by system library # # -DHAVE_TZNAME=2 # support and define "tzname" -# # to the "CFLAGS=" line. "tzname" is required by POSIX.1-1988 and later. +# # to the "CFLAGS=" line. Although "tzname" is required by POSIX.1-1988 +# # and later, its contents are unspecified if you use a geographical TZ +# # and the variable is planned to be removed in a future POSIX edition. # # If not defined, the code attempts to guess HAVE_TZNAME from other macros. # # Warning: unless time_tz is also defined, HAVE_TZNAME=1 can cause # # crashes when combined with some platforms' standard libraries, @@ -364,7 +371,9 @@ GCC_DEBUG_FLAGS = -DGCC_LINT -g3 -O3 -fno-common \ # # -DUSG_COMPAT=1 # support, and variables are defined by system library # # -DUSG_COMPAT=2 # support and define variables # # to the "CFLAGS=" line; "timezone" and "daylight" are inspired by Unix -# # Systems Group code and are required by POSIX.1-2008 and later (with XSI). +# # Systems Group code and are required by POSIX.1-2008 and later (with XSI), +# # although their contents are unspecified if you use a geographical TZ +# # and the variables are planned to be removed in a future edition of POSIX. # # If not defined, the code attempts to guess USG_COMPAT from other macros. # # # # To support the external variable "altzone", add @@ -428,18 +437,13 @@ GCC_DEBUG_FLAGS = -DGCC_LINT -g3 -O3 -fno-common \ # The name of a POSIX-like library archiver, its flags, C compiler, # linker flags, and 'make' utility. Ordinarily the defaults suffice. -# The commented-out values are the defaults specified by POSIX.1-202x/D4. +# The commented-out values are the defaults specified by POSIX.1-2024. #AR = ar #ARFLAGS = -rv #CC = c17 #LDFLAGS = #MAKE = make -# For leap seconds, this Makefile uses LEAPSECONDS='-L leapseconds' in -# submake command lines. The default is no leap seconds. - -LEAPSECONDS= - # Where to fetch leap-seconds.list from. leaplist_URI = \ https://hpiers.obspm.fr/iers/bul/bulc/ntp/leap-seconds.list @@ -461,7 +465,7 @@ ZFLAGS= # How to use zic to install TZif files. -ZIC_INSTALL= $(ZIC) -d '$(DESTDIR)$(TZDIR)' $(LEAPSECONDS) +ZIC_INSTALL= $(ZIC) -d '$(DESTDIR)$(TZDIR)' # The name of a POSIX-compliant 'awk' on your system. # mawk 1.3.3 and Solaris 10 /usr/bin/awk do not work. @@ -480,6 +484,7 @@ KSHELL= /bin/bash # Name of curl <https://curl.haxx.se/>, used for HTML validation # and to fetch leap-seconds.list from upstream. +# Set CURL=: to disable use of the Internet. CURL= curl # Name of GNU Privacy Guard <https://gnupg.org/>, used to sign distributions. @@ -533,21 +538,28 @@ OK_LINE= '^'$(OK_CHAR)'*$$' # Flags to give 'tar' when making a distribution. # Try to use flags appropriate for GNU tar. -GNUTARFLAGS= --format=pax --pax-option='delete=atime,delete=ctime' \ +GNUTARFLAGS= --format=pax --pax-option=delete=atime,delete=ctime \ --numeric-owner --owner=0 --group=0 \ --mode=go+u,go-w --sort=name -TARFLAGS= `if tar $(GNUTARFLAGS) --version >/dev/null 2>&1; \ - then echo $(GNUTARFLAGS); \ - else :; \ - fi` +SETUP_TAR= \ + export LC_ALL=C && \ + if tar $(GNUTARFLAGS) --version >/dev/null 2>&1; then \ + TAR='tar $(GNUTARFLAGS)'; \ + else \ + TAR=tar; \ + fi # Flags to give 'gzip' when making a distribution. GZIPFLAGS= -9n # When comparing .tzs files, use GNU diff's -F'^TZ=' option if supported. # This makes it easier to see which Zone has been affected. -DIFF_TZS= diff -u$$(! diff -u -F'^TZ=' - - <>/dev/null >&0 2>&1 \ - || echo ' -F^TZ=') +SETUP_DIFF_TZS = \ + if diff -u -F'^TZ=' - - <>/dev/null >&0 2>&1; then \ + DIFF_TZS='diff -u -F^TZ='; \ + else \ + DIFF_TZS='diff -u'; \ + fi # ':' on typical hosts; 'ranlib' on the ancient hosts that still need ranlib. RANLIB= : @@ -561,8 +573,8 @@ RANLIB= : TZCOBJS= zic.o -TZDOBJS= zdump.o localtime.o asctime.o strftime.o -DATEOBJS= date.o localtime.o strftime.o asctime.o +TZDOBJS= zdump.o localtime.o strftime.o +DATEOBJS= date.o localtime.o strftime.o LIBSRCS= localtime.c asctime.c difftime.c strftime.c LIBOBJS= localtime.o asctime.o difftime.o strftime.o HEADERS= tzfile.h private.h @@ -579,8 +591,7 @@ MANTXTS= newctime.3.txt newstrftime.3.txt newtzset.3.txt \ COMMON= calendars CONTRIBUTING LICENSE Makefile \ NEWS README SECURITY theory.html version WEB_PAGES= tz-art.html tz-how-to.html tz-link.html -CHECK_WEB_PAGES=check_theory.html check_tz-art.html \ - check_tz-how-to.html check_tz-link.html +CHECK_WEB_PAGES=theory.ck tz-art.ck tz-how-to.ck tz-link.ck DOCS= $(MANS) date.1 $(MANTXTS) $(WEB_PAGES) PRIMARY_YDATA= africa antarctica asia australasia \ europe northamerica southamerica @@ -641,8 +652,7 @@ install: all $(DATA) $(REDO) $(MANS) '$(DESTDIR)$(MANDIR)/man3' '$(DESTDIR)$(MANDIR)/man5' \ '$(DESTDIR)$(MANDIR)/man8' $(ZIC_INSTALL) -l $(LOCALTIME) \ - `case '$(POSIXRULES)' in ?*) echo '-p';; esac \ - ` $(POSIXRULES) \ + -p $(POSIXRULES) \ -t '$(DESTDIR)$(TZDEFAULT)' cp -f $(TABDATA) '$(DESTDIR)$(TZDIR)/.' cp tzselect '$(DESTDIR)$(BINDIR)/.' @@ -665,10 +675,10 @@ INSTALL: ALL install date.1 # and append "-dirty" if the contents do not already end in "-dirty". version: $(VERSION_DEPS) { (type git) >/dev/null 2>&1 && \ - V=`git describe --match '[0-9][0-9][0-9][0-9][a-z]*' \ - --abbrev=7 --dirty` || \ - if test '$(VERSION)' = unknown && V=`cat $@`; then \ - case $$V in *-dirty);; *) V=$$V-dirty;; esac; \ + V=$$(git describe --match '[0-9][0-9][0-9][0-9][a-z]*' \ + --abbrev=7 --dirty) || \ + if test '$(VERSION)' = unknown && read -r V <$@; then \ + V=$${V%-dirty}-dirty; \ else \ V='$(VERSION)'; \ fi; } && \ @@ -678,7 +688,7 @@ version: $(VERSION_DEPS) # These files can be tailored by setting BACKWARD, PACKRATDATA, PACKRATLIST. vanguard.zi main.zi rearguard.zi: $(DSTDATA_ZI_DEPS) $(AWK) \ - -v DATAFORM=`expr $@ : '\(.*\).zi'` \ + -v DATAFORM=$(@:.zi=) \ -v PACKRATDATA='$(PACKRATDATA)' \ -v PACKRATLIST='$(PACKRATLIST)' \ -f ziguard.awk \ @@ -687,7 +697,7 @@ vanguard.zi main.zi rearguard.zi: $(DSTDATA_ZI_DEPS) # This file has a version comment that attempts to capture any tailoring # via BACKWARD, DATAFORM, PACKRATDATA, PACKRATLIST, and REDO. tzdata.zi: $(DATAFORM).zi version zishrink.awk - version=`sed 1q version` && \ + read -r version <version && \ LC_ALL=C $(AWK) \ -v dataform='$(DATAFORM)' \ -v deps='$(DSTDATA_ZI_DEPS) zishrink.awk' \ @@ -708,7 +718,7 @@ tzdir.h: mv $@.out $@ version.h: version - VERSION=`cat version` && printf '%s\n' \ + read -r VERSION <version && printf '%s\n' \ 'static char const PKGVERSION[]="($(PACKAGE)) ";' \ "static char const TZVERSION[]=\"$$VERSION\";" \ 'static char const REPORT_BUGS_TO[]="$(BUGEMAIL)";' \ @@ -748,12 +758,11 @@ commit-leap-seconds.list: fetch-leap-seconds.list git commit --author="$$author" --date="$$date" -m'make $@' \ leap-seconds.list -# Arguments to pass to submakes of install_data. +# Arguments to pass to submakes. # They can be overridden by later submake arguments. INSTALLARGS = \ BACKWARD='$(BACKWARD)' \ DESTDIR='$(DESTDIR)' \ - LEAPSECONDS='$(LEAPSECONDS)' \ PACKRATDATA='$(PACKRATDATA)' \ PACKRATLIST='$(PACKRATLIST)' \ TZDEFAULT='$(TZDEFAULT)' \ @@ -762,16 +771,11 @@ INSTALLARGS = \ INSTALL_DATA_DEPS = zic leapseconds tzdata.zi -# 'make install_data' installs one set of TZif files. -install_data: $(INSTALL_DATA_DEPS) - $(ZIC_INSTALL) tzdata.zi - posix_only: $(INSTALL_DATA_DEPS) - $(MAKE) $(INSTALLARGS) LEAPSECONDS= install_data + $(ZIC_INSTALL) tzdata.zi right_only: $(INSTALL_DATA_DEPS) - $(MAKE) $(INSTALLARGS) LEAPSECONDS='-L leapseconds' \ - install_data + $(ZIC_INSTALL) -L leapseconds tzdata.zi # In earlier versions of this makefile, the other two directories were # subdirectories of $(TZDIR). However, this led to configuration errors. @@ -802,8 +806,7 @@ ZDS = dummy.zd # Rule used only by submakes invoked by the $(TZS_NEW) rule. # It is separate so that GNU 'make -j' can run instances in parallel. $(ZDS): zdump - ./zdump -i $(TZS_CUTOFF_FLAG) '$(wd)/'$$(expr $@ : '\(.*\).zd') \ - >$@ + ./zdump -i $(TZS_CUTOFF_FLAG) "$$PWD/$(@:.zd=)" >$@ TZS_NEW_DEPS = tzdata.zi zdump zic $(TZS_NEW): $(TZS_NEW_DEPS) @@ -812,20 +815,19 @@ $(TZS_NEW): $(TZS_NEW_DEPS) $(zic) -d tzs$(TZS_YEAR).dir tzdata.zi $(AWK) '/^L/{print "Link\t" $$2 "\t" $$3}' \ tzdata.zi | LC_ALL=C sort >$@.out - wd=`pwd` && \ - x=`$(AWK) '/^Z/{print "tzs$(TZS_YEAR).dir/" $$2 ".zd"}' \ + x=$$($(AWK) '/^Z/{print "tzs$(TZS_YEAR).dir/" $$2 ".zd"}' \ tzdata.zi \ - | LC_ALL=C sort -t . -k 2,2` && \ + | LC_ALL=C sort -t . -k 2,2) && \ set x $$x && \ shift && \ ZDS=$$* && \ - $(MAKE) wd="$$wd" TZS_CUTOFF_FLAG="$(TZS_CUTOFF_FLAG)" \ + $(MAKE) TZS_CUTOFF_FLAG="$(TZS_CUTOFF_FLAG)" \ ZDS="$$ZDS" $$ZDS && \ sed 's,^TZ=".*\.dir/,TZ=",' $$ZDS >>$@.out rm -fr tzs$(TZS_YEAR).dir mv $@.out $@ -# If $(TZS) exists but 'make check_tzs' fails, a maintainer should inspect the +# If $(TZS) exists but 'make tzs.ck' fails, a maintainer should inspect the # failed output and fix the inconsistency, perhaps by running 'make force_tzs'. $(TZS): touch $@ @@ -842,7 +844,7 @@ date: $(DATEOBJS) $(CC) -o $@ $(CFLAGS) $(LDFLAGS) $(DATEOBJS) $(LDLIBS) tzselect: tzselect.ksh version - VERSION=`cat version` && sed \ + read -r VERSION <version && sed \ -e "s'#!/bin/bash'#!"'$(KSHELL)'\' \ -e s\''\(AWK\)=[^}]*'\''\1=\'\''$(AWK)\'\'\' \ -e s\''\(PKGVERSION\)=.*'\''\1=\'\''($(PACKAGE)) \'\'\' \ @@ -853,11 +855,11 @@ tzselect: tzselect.ksh version chmod +x $@.out mv $@.out $@ -check: check_back check_mild -check_mild: check_character_set check_white_space check_links \ - check_name_lengths check_now \ - check_slashed_abbrs check_sorted \ - check_tables check_web check_ziguard check_zishrink check_tzs +check: check_mild back.ck +check_mild: check_web check_zishrink \ + character-set.ck white-space.ck links.ck mainguard.ck \ + name-lengths.ck now.ck slashed-abbrs.ck sorted.ck \ + tables.ck ziguard.ck tzs.ck # True if UTF8_LOCALE does not work; # otherwise, false but with LC_ALL set to $(UTF8_LOCALE). @@ -865,9 +867,9 @@ UTF8_LOCALE_MISSING = \ { test ! '$(UTF8_LOCALE)' \ || ! printf 'A\304\200B\n' \ | LC_ALL='$(UTF8_LOCALE)' grep -q '^A.B$$' >/dev/null 2>&1 \ - || { LC_ALL='$(UTF8_LOCALE)'; export LC_ALL; false; }; } + || { export LC_ALL='$(UTF8_LOCALE)'; false; }; } -check_character_set: $(ENCHILADA) +character-set.ck: $(ENCHILADA) $(UTF8_LOCALE_MISSING) || { \ sharp='#' && \ ! grep -Env $(SAFE_LINE) $(MANS) date.1 $(MANTXTS) \ @@ -882,48 +884,55 @@ check_character_set: $(ENCHILADA) } touch $@ -check_white_space: $(ENCHILADA) +white-space.ck: $(ENCHILADA) $(UTF8_LOCALE_MISSING) || { \ - patfmt=' \t|[\f\r\v]' && pat=`printf "$$patfmt\\n"` && \ + enchilada='$(ENCHILADA)' && \ + patfmt=' \t|[\f\r\v]' && pat=$$(printf "$$patfmt\\n") && \ ! grep -En "$$pat|[$s]\$$" \ - $$(ls $(ENCHILADA) | grep -Fvx leap-seconds.list); \ + $${enchilada%leap-seconds.list*} \ + $${enchilada#*leap-seconds.list}; \ } touch $@ PRECEDES_FILE_NAME = ^(Zone|Link[$s]+[^$s]+)[$s]+ FILE_NAME_COMPONENT_TOO_LONG = $(PRECEDES_FILE_NAME)[^$s]*[^/$s]{15} -check_name_lengths: $(TDATA_TO_CHECK) backzone - ! grep -En '$(FILE_NAME_COMPONENT_TOO_LONG)' \ +name-lengths.ck: $(TDATA_TO_CHECK) backzone + :;! grep -En '$(FILE_NAME_COMPONENT_TOO_LONG)' \ $(TDATA_TO_CHECK) backzone touch $@ +mainguard.ck: main.zi + test '$(PACKRATLIST)' || \ + cat $(TDATA) $(PACKRATDATA) | diff -u - main.zi + touch $@ + PRECEDES_STDOFF = ^(Zone[$s]+[^$s]+)?[$s]+ STDOFF = [-+]?[0-9:.]+ RULELESS_SAVE = (-|$(STDOFF)[sd]?) RULELESS_SLASHED_ABBRS = \ $(PRECEDES_STDOFF)$(STDOFF)[$s]+$(RULELESS_SAVE)[$s]+[^$s]*/ -check_slashed_abbrs: $(TDATA_TO_CHECK) - ! grep -En '$(RULELESS_SLASHED_ABBRS)' $(TDATA_TO_CHECK) +slashed-abbrs.ck: $(TDATA_TO_CHECK) + :;! grep -En '$(RULELESS_SLASHED_ABBRS)' $(TDATA_TO_CHECK) touch $@ CHECK_CC_LIST = { n = split($$1,a,/,/); for (i=2; i<=n; i++) print a[1], a[i]; } -check_sorted: backward backzone +sorted.ck: backward backzone $(AWK) '/^Link/ {printf "%.5d %s\n", g, $$3} !/./ {g++}' \ backward | LC_ALL=C sort -cu - $(AWK) '/^Zone/ {print $$2}' backzone | LC_ALL=C sort -cu + $(AWK) '/^Zone.*\// {print $$2}' backzone | LC_ALL=C sort -cu touch $@ -check_back: checklinks.awk $(TDATA_TO_CHECK) +back.ck: checklinks.awk $(TDATA_TO_CHECK) $(AWK) \ -v DATAFORM=$(DATAFORM) \ -v backcheck=backward \ -f checklinks.awk $(TDATA_TO_CHECK) touch $@ -check_links: checklinks.awk tzdata.zi +links.ck: checklinks.awk tzdata.zi $(AWK) \ -v DATAFORM=$(DATAFORM) \ -f checklinks.awk tzdata.zi @@ -932,26 +941,36 @@ check_links: checklinks.awk tzdata.zi # Check timestamps from now through 28 years from now, to make sure # that zonenow.tab contains all sequences of planned timestamps, # without any duplicate sequences. In theory this might require -# 2800 years but that would take a long time to check. -CHECK_NOW_TIMESTAMP = `./date +%s` +# 2800+ years but that would take a long time to check. +CHECK_NOW_TIMESTAMP = $$(./date +%s) CHECK_NOW_FUTURE_YEARS = 28 -CHECK_NOW_FUTURE_SECS = $(CHECK_NOW_FUTURE_YEARS) '*' 366 '*' 24 '*' 60 '*' 60 -check_now: checknow.awk date tzdata.zi zdump zic zone1970.tab zonenow.tab - rm -fr $@.dir - mkdir $@.dir - ./zic -d $@.dir tzdata.zi +CHECK_NOW_FUTURE_SECS = $(CHECK_NOW_FUTURE_YEARS) * 366 * 24 * 60 * 60 +now.ck: checknow.awk date tzdata.zi zdump zic zone1970.tab zonenow.tab + rm -fr $@d + mkdir $@d + ./zic -d $@d tzdata.zi now=$(CHECK_NOW_TIMESTAMP) && \ - future=`expr $(CHECK_NOW_FUTURE_SECS) + $$now` && \ + future=$$(($(CHECK_NOW_FUTURE_SECS) + $$now)) && \ ./zdump -i -t $$now,$$future \ - $$(find $$PWD/$@.dir/????*/ -type f) \ - >$@.dir/zdump.tab + $$(find "$$PWD/$@d"/????*/ -type f) \ + >$@d/zdump-now.tab && \ + ./zdump -i -t 0,$$future \ + $$(find "$$PWD/$@d" -name Etc -prune \ + -o -type f ! -name '*.tab' -print) \ + >$@d/zdump-1970.tab $(AWK) \ - -v zdump_table=$@.dir/zdump.tab \ + -v zdump_table=$@d/zdump-now.tab \ -f checknow.awk zonenow.tab - rm -fr $@.dir + $(AWK) \ + 'BEGIN {print "-\t-\tUTC"} /^Zone/ {print "-\t-\t" $$2}' \ + $(PRIMARY_YDATA) backward factory | \ + $(AWK) \ + -v zdump_table=$@d/zdump-1970.tab \ + -f checknow.awk + rm -fr $@d touch $@ -check_tables: checktab.awk $(YDATA) backward zone.tab zone1970.tab +tables.ck: checktab.awk $(YDATA) backward zone.tab zone1970.tab for tab in $(ZONETABLES); do \ test "$$tab" = zone.tab && links='$(BACKWARD)' || links=''; \ $(AWK) -f checktab.awk -v zone_table=$$tab $(YDATA) $$links \ @@ -959,26 +978,24 @@ check_tables: checktab.awk $(YDATA) backward zone.tab zone1970.tab done touch $@ -check_tzs: $(TZS) $(TZS_NEW) +tzs.ck: $(TZS) $(TZS_NEW) if test -s $(TZS); then \ - $(DIFF_TZS) $(TZS) $(TZS_NEW); \ + $(SETUP_DIFF_TZS) && $$DIFF_TZS $(TZS) $(TZS_NEW); \ else \ cp $(TZS_NEW) $(TZS); \ fi touch $@ check_web: $(CHECK_WEB_PAGES) -check_theory.html: theory.html -check_tz-art.html: tz-art.html -check_tz-how-to.html: tz-how-to.html -check_tz-link.html: tz-link.html -check_theory.html check_tz-art.html check_tz-how-to.html check_tz-link.html: - $(CURL) -sS --url https://validator.w3.org/nu/ -F out=gnu \ - -F file=@$$(expr $@ : 'check_\(.*\)') -o $@.out && \ +.SUFFIXES: .ck .html +.html.ck: + { ! ($(CURL) --version) >/dev/null 2>&1 || \ + $(CURL) -sS --url https://validator.w3.org/nu/ -F out=gnu \ + -F file=@$<; } >$@.out && \ test ! -s $@.out || { cat $@.out; exit 1; } mv $@.out $@ -check_ziguard: rearguard.zi vanguard.zi ziguard.awk +ziguard.ck: rearguard.zi vanguard.zi ziguard.awk $(AWK) -v DATAFORM=rearguard -f ziguard.awk vanguard.zi | \ diff -u rearguard.zi - $(AWK) -v DATAFORM=vanguard -f ziguard.awk rearguard.zi | \ @@ -987,36 +1004,35 @@ check_ziguard: rearguard.zi vanguard.zi ziguard.awk # Check that zishrink.awk does not alter the data, and that ziguard.awk # preserves main-format data. -check_zishrink: check_zishrink_posix check_zishrink_right -check_zishrink_posix check_zishrink_right: \ +check_zishrink: zishrink-posix.ck zishrink-right.ck +zishrink-posix.ck zishrink-right.ck: \ zic leapseconds $(PACKRATDATA) $(PACKRATLIST) \ $(TDATA) $(DATAFORM).zi tzdata.zi - rm -fr $@.dir $@-t.dir $@-shrunk.dir - mkdir $@.dir $@-t.dir $@-shrunk.dir + rm -fr $@d t-$@d shrunk-$@d + mkdir $@d t-$@d shrunk-$@d case $@ in \ - *_right) leap='-L leapseconds';; \ + *right*) leap='-L leapseconds';; \ *) leap=;; \ esac && \ - $(ZIC) $$leap -d $@.dir $(DATAFORM).zi && \ - $(ZIC) $$leap -d $@-shrunk.dir tzdata.zi && \ + $(ZIC) $$leap -d $@d $(DATAFORM).zi && \ + $(ZIC) $$leap -d shrunk-$@d tzdata.zi && \ case $(DATAFORM),$(PACKRATLIST) in \ main,) \ - $(ZIC) $$leap -d $@-t.dir $(TDATA) && \ + $(ZIC) $$leap -d t-$@d $(TDATA) && \ $(AWK) '/^Rule/' $(TDATA) | \ - $(ZIC) $$leap -d $@-t.dir - $(PACKRATDATA) && \ - diff -r $@.dir $@-t.dir;; \ + $(ZIC) $$leap -d t-$@d - $(PACKRATDATA) && \ + diff -r $@d t-$@d;; \ esac - diff -r $@.dir $@-shrunk.dir - rm -fr $@.dir $@-t.dir $@-shrunk.dir + diff -r $@d shrunk-$@d + rm -fr $@d t-$@d shrunk-$@d touch $@ clean_misc: - rm -fr check_*.dir typecheck_*.dir - rm -f *.o *.out $(TIME_T_ALTERNATIVES) \ - check_* core typecheck_* \ + rm -fr *.ckd *.dir + rm -f *.ck *.core *.o *.out core core.* \ date tzdir.h tzselect version.h zdump zic libtz.a clean: clean_misc - rm -fr *.dir tzdb-*/ + rm -fr tzdb-*/ rm -f *.zi $(TZS_NEW) maintainer-clean: clean @@ -1027,7 +1043,7 @@ maintainer-clean: clean names: @echo $(ENCHILADA) -public: check check_public $(CHECK_TIME_T_ALTERNATIVES) \ +public: check public.ck $(CHECK_TIME_T_ALTERNATIVES) \ tarballs signatures date.1.txt: date.1 @@ -1041,7 +1057,7 @@ zdump.8.txt: zdump.8 zic.8.txt: zic.8 $(MANTXTS): workman.sh - LC_ALL=C sh workman.sh `expr $@ : '\(.*\)\.txt$$'` >$@.out + LC_ALL=C sh workman.sh $(@:.txt=) >$@.out mv $@.out $@ # Set file timestamps deterministically if possible, @@ -1054,13 +1070,13 @@ SET_TIMESTAMP_N = sh -c '\ n=$$0 dest=$$1; shift; \ <"$$dest" && \ if test $$n != 0 && \ - lsout=`ls -nt --time-style="+%s" "$$@" 2>/dev/null`; then \ + lsout=$$(ls -nt --time-style="+%s" "$$@" 2>/dev/null); then \ set x $$lsout && \ - timestamp=`expr $$7 + $$n` && \ + timestamp=$$(($$7 + $$n)) && \ echo "+ touch -md @$$timestamp $$dest" && \ touch -md @$$timestamp "$$dest"; \ else \ - newest=`ls -t "$$@" | sed 1q` && \ + newest=$$(ls -t "$$@" | sed 1q) && \ echo "+ touch -mr $$newest $$dest" && \ touch -mr "$$newest" "$$dest"; \ fi' @@ -1083,15 +1099,15 @@ SET_TIMESTAMP_DEP = $(SET_TIMESTAMP_N) 1 set-timestamps.out: $(EIGHT_YARDS) rm -f $@ if (type git) >/dev/null 2>&1 && \ - files=`git ls-files $(EIGHT_YARDS)` && \ + files=$$(git ls-files $(EIGHT_YARDS)) && \ touch -md @1 test.out; then \ rm -f test.out && \ for file in $$files; do \ if git diff --quiet $$file; then \ - time=`TZ=UTC0 git log -1 \ + time=$$(TZ=UTC0 git log -1 \ --format='tformat:%cd' \ --date='format:%Y-%m-%dT%H:%M:%SZ' \ - $$file` && \ + $$file) && \ echo "+ touch -md $$time $$file" && \ touch -md $$time $$file; \ else \ @@ -1100,8 +1116,8 @@ set-timestamps.out: $(EIGHT_YARDS) done; \ fi $(SET_TIMESTAMP_DEP) leapseconds $(LEAP_DEPS) - for file in `ls $(MANTXTS) | sed 's/\.txt$$//'`; do \ - $(SET_TIMESTAMP_DEP) $$file.txt $$file workman.sh || \ + for file in $(MANTXTS); do \ + $(SET_TIMESTAMP_DEP) $$file $${file%.txt} workman.sh || \ exit; \ done $(SET_TIMESTAMP_DEP) version $(VERSION_DEPS) @@ -1114,30 +1130,29 @@ set-tzs-timestamp.out: $(TZS) # The zics below ensure that each data file can stand on its own. # We also do an all-files run to catch links to links. -check_public: $(VERSION_DEPS) - rm -fr public.dir - mkdir public.dir - ln $(VERSION_DEPS) public.dir - cd public.dir \ +public.ck: $(VERSION_DEPS) + rm -fr $@d + mkdir $@d + ln $(VERSION_DEPS) $@d + cd $@d \ && $(MAKE) CFLAGS='$(GCC_DEBUG_FLAGS)' TZDIR='$(TZDIR)' ALL - for i in $(TDATA_TO_CHECK) public.dir/tzdata.zi \ - public.dir/vanguard.zi public.dir/main.zi \ - public.dir/rearguard.zi; \ + for i in $(TDATA_TO_CHECK) \ + tzdata.zi vanguard.zi main.zi rearguard.zi; \ do \ - public.dir/zic -v -d public.dir/zoneinfo $$i 2>&1 || exit; \ + $@d/zic -v -d $@d/zoneinfo $@d/$$i || exit; \ done - public.dir/zic -v -d public.dir/zoneinfo-all $(TDATA_TO_CHECK) + $@d/zic -v -d $@d/zoneinfo-all $(TDATA_TO_CHECK) : : Also check 'backzone' syntax. - rm public.dir/main.zi - cd public.dir && $(MAKE) PACKRATDATA=backzone main.zi - public.dir/zic -d public.dir/zoneinfo main.zi - rm public.dir/main.zi - cd public.dir && \ + rm $@d/main.zi + cd $@d && $(MAKE) PACKRATDATA=backzone main.zi + $@d/zic -d $@d/zoneinfo main.zi + rm $@d/main.zi + cd $@d && \ $(MAKE) PACKRATDATA=backzone PACKRATLIST=zone.tab main.zi - public.dir/zic -d public.dir/zoneinfo main.zi + $@d/zic -d $@d/zoneinfo main.zi : - rm -fr public.dir + rm -fr $@d touch $@ # Check that the code works under various alternative @@ -1145,46 +1160,47 @@ check_public: $(VERSION_DEPS) check_time_t_alternatives: $(TIME_T_ALTERNATIVES) $(TIME_T_ALTERNATIVES_TAIL): $(TIME_T_ALTERNATIVES_HEAD) $(TIME_T_ALTERNATIVES): $(VERSION_DEPS) - rm -fr $@.dir - mkdir $@.dir - ln $(VERSION_DEPS) $@.dir + rm -fr $@d + mkdir $@d + ln $(VERSION_DEPS) $@d case $@ in \ - int*32_t) range=-2147483648,2147483648;; \ + *32_t*) range=-2147483648,2147483648;; \ u*) range=0,4294967296;; \ *) range=-4294967296,4294967296;; \ esac && \ - wd=`pwd` && \ - zones=`$(AWK) '/^[^#]/ { print $$3 }' <zone1970.tab` && \ + wd=$$PWD && \ + zones=$$($(AWK) '/^[^#]/ { print $$3 }' <zone1970.tab) && \ if test $@ = $(TIME_T_ALTERNATIVES_HEAD); then \ range_target=; \ else \ range_target=to$$range.tzs; \ fi && \ - (cd $@.dir && \ - $(MAKE) TOPDIR="$$wd/$@.dir" \ - CFLAGS='$(CFLAGS) -Dtime_tz='"'$@'" \ + (cd $@d && \ + $(MAKE) TOPDIR="$$wd/$@d" \ + CFLAGS='$(CFLAGS) -Dtime_tz='"'$(@:.ck=)'" \ REDO='$(REDO)' \ - D=$$wd/$@.dir \ + D="$$wd/$@d" \ TZS_YEAR="$$range" TZS_CUTOFF_FLAG="-t $$range" \ install $$range_target) && \ test $@ = $(TIME_T_ALTERNATIVES_HEAD) || { \ - (cd $(TIME_T_ALTERNATIVES_HEAD).dir && \ - $(MAKE) TOPDIR="$$wd/$@.dir" \ + (cd $(TIME_T_ALTERNATIVES_HEAD)d && \ + $(MAKE) TOPDIR="$$wd/$@d" \ TZS_YEAR="$$range" TZS_CUTOFF_FLAG="-t $$range" \ - D=$$wd/$@.dir \ + D="$$wd/$@d" \ to$$range.tzs) && \ - $(DIFF_TZS) $(TIME_T_ALTERNATIVES_HEAD).dir/to$$range.tzs \ - $@.dir/to$$range.tzs && \ + $(SETUP_DIFF_TZS) && \ + $$DIFF_TZS $(TIME_T_ALTERNATIVES_HEAD)d/to$$range.tzs \ + $@d/to$$range.tzs && \ if diff -q Makefile Makefile 2>/dev/null; then \ quiet_option='-q'; \ else \ quiet_option=''; \ fi && \ - diff $$quiet_option -r $(TIME_T_ALTERNATIVES_HEAD).dir/etc \ - $@.dir/etc && \ + diff $$quiet_option -r $(TIME_T_ALTERNATIVES_HEAD)d/etc \ + $@d/etc && \ diff $$quiet_option -r \ - $(TIME_T_ALTERNATIVES_HEAD).dir/usr/share \ - $@.dir/usr/share; \ + $(TIME_T_ALTERNATIVES_HEAD)d/usr/share \ + $@d/usr/share; \ } touch $@ @@ -1199,7 +1215,7 @@ ALL_ASC = $(TRADITIONAL_ASC) $(REARGUARD_ASC) \ tarballs rearguard_tarballs tailored_tarballs traditional_tarballs \ signatures rearguard_signatures traditional_signatures: \ version set-timestamps.out rearguard.zi vanguard.zi - VERSION=`cat version` && \ + read -r VERSION <version && \ $(MAKE) AWK='$(AWK)' VERSION="$$VERSION" $@_version # These *_version rules are intended for use if VERSION is set by some @@ -1218,15 +1234,15 @@ rearguard_signatures_version: $(REARGUARD_ASC) traditional_signatures_version: $(TRADITIONAL_ASC) tzcode$(VERSION).tar.gz: set-timestamps.out - LC_ALL=C && export LC_ALL && \ - tar $(TARFLAGS) -cf - \ + $(SETUP_TAR) && \ + $$TAR -cf - \ $(COMMON) $(DOCS) $(SOURCES) | \ gzip $(GZIPFLAGS) >$@.out mv $@.out $@ tzdata$(VERSION).tar.gz: set-timestamps.out - LC_ALL=C && export LC_ALL && \ - tar $(TARFLAGS) -cf - $(TZDATA_DIST) | \ + $(SETUP_TAR) && \ + $$TAR -cf - $(TZDATA_DIST) | \ gzip $(GZIPFLAGS) >$@.out mv $@.out $@ @@ -1251,9 +1267,9 @@ tzdata$(VERSION)-rearguard.tar.gz: rearguard.zi set-timestamps.out : The dummy pacificnew pacifies TZUpdater 2.3.1 and earlier. $(CREATE_EMPTY) $@.dir/pacificnew touch -mr version $@.dir/version - LC_ALL=C && export LC_ALL && \ + $(SETUP_TAR) && \ (cd $@.dir && \ - tar $(TARFLAGS) -cf - \ + $$TAR -cf - \ $(TZDATA_DIST) pacificnew | \ gzip $(GZIPFLAGS)) >$@.out mv $@.out $@ @@ -1269,9 +1285,14 @@ tzdata$(VERSION)-tailored.tar.gz: set-timestamps.out rm -fr $@.dir mkdir $@.dir : The dummy pacificnew pacifies TZUpdater 2.3.1 and earlier. + if test $(DATAFORM) = vanguard; then \ + pacificnew=; \ + else \ + pacificnew=pacificnew; \ + fi && \ cd $@.dir && \ $(CREATE_EMPTY) $(PRIMARY_YDATA) $(NDATA) backward \ - `test $(DATAFORM) = vanguard || echo pacificnew` + $$pacificnew (grep '^#' tzdata.zi && echo && cat $(DATAFORM).zi) \ >$@.dir/etcetera touch -mr tzdata.zi $@.dir/etcetera @@ -1291,9 +1312,9 @@ tzdata$(VERSION)-tailored.tar.gz: set-timestamps.out test -f $@.dir/$$file || links="$$links $$file"; \ done && \ ln $$links $@.dir - LC_ALL=C && export LC_ALL && \ + $(SETUP_TAR) && \ (cd $@.dir && \ - tar $(TARFLAGS) -cf - * | gzip $(GZIPFLAGS)) >$@.out + $$TAR -cf - * | gzip $(GZIPFLAGS)) >$@.out mv $@.out $@ tzdb-$(VERSION).tar.lz: set-timestamps.out set-tzs-timestamp.out @@ -1301,8 +1322,8 @@ tzdb-$(VERSION).tar.lz: set-timestamps.out set-tzs-timestamp.out mkdir tzdb-$(VERSION) ln $(ENCHILADA) tzdb-$(VERSION) $(SET_TIMESTAMP) tzdb-$(VERSION) tzdb-$(VERSION)/* - LC_ALL=C && export LC_ALL && \ - tar $(TARFLAGS) -cf - tzdb-$(VERSION) | lzip -9 >$@.out + $(SETUP_TAR) && \ + $$TAR -cf - tzdb-$(VERSION) | lzip -9 >$@.out mv $@.out $@ tzcode$(VERSION).tar.gz.asc: tzcode$(VERSION).tar.gz @@ -1313,22 +1334,21 @@ $(ALL_ASC): $(GPG) --armor --detach-sign $? TYPECHECK_CFLAGS = $(CFLAGS) -DTYPECHECK -D__time_t_defined -D_TIME_T -typecheck: typecheck_long_long typecheck_unsigned -typecheck_long_long typecheck_unsigned: $(VERSION_DEPS) - rm -fr $@.dir - mkdir $@.dir - ln $(VERSION_DEPS) $@.dir - cd $@.dir && \ +typecheck: long-long.ck unsigned.ck +long-long.ck unsigned.ck: $(VERSION_DEPS) + rm -fr $@d + mkdir $@d + ln $(VERSION_DEPS) $@d + cd $@d && \ case $@ in \ - *_long_long) i="long long";; \ - *_unsigned ) i="unsigned" ;; \ + long-long.*) i="long long";; \ + unsigned.* ) i="unsigned" ;; \ esac && \ - typecheck_cflags='' && \ $(MAKE) \ CFLAGS="$(TYPECHECK_CFLAGS) \"-Dtime_t=$$i\"" \ - TOPDIR="`pwd`" \ + TOPDIR="$$PWD" \ install - $@.dir/zdump -i -c 1970,1971 Europe/Rome + $@d/zdump -i -c 1970,1971 Europe/Rome touch $@ zonenames: tzdata.zi @@ -1347,7 +1367,7 @@ zic.o: private.h tzfile.h tzdir.h version.h .PHONY: check_web check_zishrink .PHONY: clean clean_misc commit-leap-seconds.list dummy.zd .PHONY: fetch-leap-seconds.list force_tzs -.PHONY: install install_data maintainer-clean names +.PHONY: install maintainer-clean names .PHONY: posix_only posix_right public .PHONY: rearguard_signatures rearguard_signatures_version .PHONY: rearguard_tarballs rearguard_tarballs_version @@ -1,5 +1,125 @@ News for the tz database +Release 2024b - 2024-09-04 12:27:47 -0700 + + Briefly: + Improve historical data for Mexico, Mongolia, and Portugal. + System V names are now obsolescent. + The main data form now uses %z. + The code now conforms to RFC 8536 for early timestamps. + Support POSIX.1-2024, which removes asctime_r and ctime_r. + Assume POSIX.2-1992 or later for shell scripts. + SUPPORT_C89 now defaults to 1. + + Changes to past timestamps + + Asia/Choibalsan is now an alias for Asia/Ulaanbaatar rather than + being a separate Zone with differing behavior before April 2008. + This seems better given our wildly conflicting information about + Mongolia's time zone history. (Thanks to Heitor David Pinto.) + + Historical transitions for Mexico have been updated based on + official Mexican decrees. The affected timestamps occur during + the years 1921-1927, 1931, 1945, 1949-1970, and 1981-1997. + The affected zones are America/Bahia_Banderas, America/Cancun, + America/Chihuahua, America/Ciudad_Juarez, America/Hermosillo, + America/Mazatlan, America/Merida, America/Mexico_City, + America/Monterrey, America/Ojinaga, and America/Tijuana. + (Thanks to Heitor David Pinto.) + + Historical transitions for Portugal, represented by Europe/Lisbon, + Atlantic/Azores, and Atlantic/Madeira, have been updated based on a + close reading of old Portuguese legislation, replacing previous data + mainly originating from Whitman and Shanks & Pottenger. These + changes affect a few transitions in 1917-1921, 1924, and 1940 + throughout these regions by a few hours or days, and various + timestamps between 1977 and 1993 depending on the region. In + particular, the Azores and Madeira did not observe DST from 1977 to + 1981. Additionally, the adoption of standard zonal time in former + Portuguese colonies have been adjusted: Africa/Maputo in 1909, and + Asia/Dili by 22 minutes at the start of 1912. + (Thanks to Tim Parenti.) + + Changes to past tm_isdst flags + + The period from 1966-04-03 through 1966-10-02 in Portugal is now + modeled as DST, to more closely reflect how contemporaneous changes + in law entered into force. + + Changes to data + + Names present only for compatibility with UNIX System V + (last released in the 1990s) have been moved to 'backward'. + These names, which for post-1970 timestamps mostly just duplicate + data of geographical names, were confusing downstream uses. + Names moved to 'backward' are now links to geographical names. + This affects behavior for TZ='EET' for some pre-1981 timestamps, + for TZ='CET' for some pre-1947 timestamps, and for TZ='WET' for + some pre-1996 timestamps. Also, TZ='MET' now behaves like + TZ='CET' and so uses the abbreviation "CET" rather than "MET". + Those needing the previous TZDB behavior, which does not match any + real-world clocks, can find the old entries in 'backzone'. + (Problem reported by Justin Grant.) + + The main source files' time zone abbreviations now use %z, + supported by zic since release 2015f and used in vanguard form + since release 2022b. For example, America/Sao_Paulo now contains + the zone continuation line "-3:00 Brazil %z", which is less error + prone than the old "-3:00 Brazil -03/-02". This does not change + the represented data: the generated TZif files are unchanged. + Rearguard form still avoids %z, to support obsolescent parsers. + + Asia/Almaty has been removed from zonenow.tab as it now agrees + with Asia/Tashkent for future timestamps, due to Kazakhstan's + 2024-02-29 time zone change. Similarly, America/Scoresbysund + has been removed, as it now agrees with America/Nuuk due to + its 2024-03-31 time zone change. + + Changes to code + + localtime.c now always uses a TZif file's time type 0 to handle + timestamps before the file's first transition. Formerly, + localtime.c sometimes inferred a different time type, in order to + handle problematic data generated by zic 2018e or earlier. As it + is now safe to assume more recent versions of zic, there is no + longer a pressing need to fail to conform RFC 8536 section 3.2, + which requires using time type 0 in this situation. This change + does not affect behavior when reading TZif files generated by zic + 2018f and later. + + POSIX.1-2024 removes asctime_r and ctime_r and does not let + libraries define them, so remove them except when needed to + conform to earlier POSIX. These functions are dangerous as they + can overrun user buffers. If you still need them, add + -DSUPPORT_POSIX2008 to CFLAGS. + + The SUPPORT_C89 option now defaults to 1 instead of 0, fixing a + POSIX-conformance bug introduced in 2023a. + + tzselect now supports POSIX.1-2024 proleptic TZ strings. Also, it + assumes POSIX.2-1992 or later, as practical porting targets now + all support that, and it uses some features from POSIX.1-2024 if + available. + + Changes to build procedure + + 'make check' no longer requires curl and Internet access. + + The build procedure now assumes POSIX.2-1992 or later, to simplify + maintenance. To build on Solaris 10, the only extant system still + defaulting to pre-POSIX, prepend /usr/xpg4/bin to PATH. + + Changes to documentation + + The documentation now reflects POSIX.1-2024. + + Changes to commentary + + Commentary about historical transitions in Portugal and her former + colonies has been expanded with links to many relevant legislation. + (Thanks to Tim Parenti.) + + Release 2024a - 2024-02-01 09:28:56 -0800 Briefly: @@ -161,7 +281,7 @@ Release 2023d - 2023-12-21 20:02:24 -0800 * It uses the special .POSIX target. * It quotes special characters more carefully. * It no longer mishandles builds in an ISO 8859 locale. - Due to the CC changes, TZDIR is now #defined in a file tzfile.h + Due to the CC changes, TZDIR is now #defined in a file tzdir.h built by 'make', not in a $(CC) -D option. Also, TZDEFAULT is now treated like TZDIR as they have similar roles. @@ -283,7 +403,7 @@ Release 2023a - 2023-03-22 12:39:33 -0700 To improve tzselect diagnostics, zone1970.tab's comments column is now limited to countries that have multiple timezones. - Note that leap seconds are planned to be discontinued by 2035. + Note that there are plans to discontinue leap seconds by 2035. Release 2022g - 2022-11-29 08:58:31 -0800 @@ -103,17 +103,16 @@ Zone Africa/Algiers 0:12:12 - LMT 1891 Mar 16 # Cape Verde / Cabo Verde # -# From Paul Eggert (2018-02-16): -# Shanks gives 1907 for the transition to +02. -# For now, ignore that and follow the 1911-05-26 Portuguese decree -# (see Europe/Lisbon). +# From Tim Parenti (2024-07-01), per Paul Eggert (2018-02-16): +# For timestamps before independence, see commentary for Europe/Lisbon. +# Shanks gives 1907 instead for the transition to -02. # # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Atlantic/Cape_Verde -1:34:04 - LMT 1912 Jan 01 2:00u # Praia - -2:00 - -02 1942 Sep - -2:00 1:00 -01 1945 Oct 15 - -2:00 - -02 1975 Nov 25 2:00 - -1:00 - -01 + -2:00 - %z 1942 Sep + -2:00 1:00 %z 1945 Oct 15 + -2:00 - %z 1975 Nov 25 2:00 + -1:00 - %z # Chad # Zone NAME STDOFF RULES FORMAT [UNTIL] @@ -345,14 +344,12 @@ Zone Africa/Cairo 2:05:09 - LMT 1900 Oct # Guinea-Bissau # -# From Paul Eggert (2018-02-16): -# Shanks gives 1911-05-26 for the transition to WAT, -# evidently confusing the date of the Portuguese decree -# (see Europe/Lisbon) with the date that it took effect. +# From Tim Parenti (2024-07-01), per Paul Eggert (2018-02-16): +# For timestamps before independence, see commentary for Europe/Lisbon. # # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Africa/Bissau -1:02:20 - LMT 1912 Jan 1 1:00u - -1:00 - -01 1975 + -1:00 - %z 1975 0:00 - GMT # Comoros @@ -417,10 +414,10 @@ Zone Africa/Bissau -1:02:20 - LMT 1912 Jan 1 1:00u # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Africa/Nairobi 2:27:16 - LMT 1908 May - 2:30 - +0230 1928 Jun 30 24:00 + 2:30 - %z 1928 Jun 30 24:00 3:00 - EAT 1930 Jan 4 24:00 - 2:30 - +0230 1936 Dec 31 24:00 - 2:45 - +0245 1942 Jul 31 24:00 + 2:30 - %z 1936 Dec 31 24:00 + 2:45 - %z 1942 Jul 31 24:00 3:00 - EAT # Liberia @@ -591,7 +588,7 @@ Rule Mauritius 2008 only - Oct lastSun 2:00 1:00 - Rule Mauritius 2009 only - Mar lastSun 2:00 0 - # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Indian/Mauritius 3:50:00 - LMT 1907 # Port Louis - 4:00 Mauritius +04/+05 + 4:00 Mauritius %z # Agalega Is, Rodriguez # no information; probably like Indian/Mauritius @@ -1071,10 +1068,10 @@ Rule Morocco 2087 only - May 11 2:00 0 - # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Africa/Casablanca -0:30:20 - LMT 1913 Oct 26 - 0:00 Morocco +00/+01 1984 Mar 16 - 1:00 - +01 1986 - 0:00 Morocco +00/+01 2018 Oct 28 3:00 - 1:00 Morocco +01/+00 + 0:00 Morocco %z 1984 Mar 16 + 1:00 - %z 1986 + 0:00 Morocco %z 2018 Oct 28 3:00 + 1:00 Morocco %z # Western Sahara # @@ -1088,9 +1085,9 @@ Zone Africa/Casablanca -0:30:20 - LMT 1913 Oct 26 # since most of it was then controlled by Morocco. Zone Africa/El_Aaiun -0:52:48 - LMT 1934 Jan # El Aaiún - -1:00 - -01 1976 Apr 14 - 0:00 Morocco +00/+01 2018 Oct 28 3:00 - 1:00 Morocco +01/+00 + -1:00 - %z 1976 Apr 14 + 0:00 Morocco %z 2018 Oct 28 3:00 + 1:00 Morocco %z # Botswana # Burundi @@ -1101,13 +1098,27 @@ Zone Africa/El_Aaiun -0:52:48 - LMT 1934 Jan # El Aaiún # Zambia # Zimbabwe # -# Shanks gives 1903-03-01 for the transition to CAT. -# Perhaps the 1911-05-26 Portuguese decree -# https://dre.pt/pdf1sdip/1911/05/12500/23132313.pdf -# merely made it official? +# From Tim Parenti (2024-07-01): +# For timestamps before Mozambique's independence, see commentary for +# Europe/Lisbon. +# +# From Paul Eggert (2024-05-24): +# The London Gazette, 1903-04-03, page 2245, says that +# as of 1903-03-03 a time ball at the port of Lourenço Marques +# (as Maputo was then called) was dropped daily at 13:00:00 LMT, +# corresponding to 22:49:41.7 GMT, so local time was +02:10:18.3. +# Conversely, the newspaper South Africa, 1909-02-09, page 321, +# says the port had just installed an apparatus that communicated +# "from the controlling clock in the new Observatory at Reuben Point ... +# exact mean South African time, i.e., 30 deg., or 2 hours East of Greenwich". +# Although Shanks gives 1903-03-01 for the transition to CAT, +# evidently the port transitioned to CAT after 1903-03-03 but before +# the Portuguese legal transition of 1912-01-01 (see Europe/Lisbon commentary). +# For lack of better info, list 1909 as the transition date. # # Zone NAME STDOFF RULES FORMAT [UNTIL] -Zone Africa/Maputo 2:10:20 - LMT 1903 Mar + #STDOFF 2:10:18.3 +Zone Africa/Maputo 2:10:18 - LMT 1909 2:00 - CAT # Namibia @@ -1172,7 +1183,7 @@ Rule Namibia 1995 2017 - Apr Sun>=1 2:00 -1:00 WAT # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Africa/Windhoek 1:08:24 - LMT 1892 Feb 8 - 1:30 - +0130 1903 Mar + 1:30 - %z 1903 Mar 2:00 - SAST 1942 Sep 20 2:00 2:00 1:00 SAST 1943 Mar 21 2:00 2:00 - SAST 1990 Mar 21 # independence @@ -1260,7 +1271,7 @@ Zone Africa/Windhoek 1:08:24 - LMT 1892 Feb 8 Zone Africa/Lagos 0:13:35 - LMT 1905 Jul 1 0:00 - GMT 1908 Jul 1 0:13:35 - LMT 1914 Jan 1 - 0:30 - +0030 1919 Sep 1 + 0:30 - %z 1919 Sep 1 1:00 - WAT # São Tomé and Príncipe diff --git a/antarctica b/antarctica index 763c27253c99..8d5d6cd1cdd0 100644 --- a/antarctica +++ b/antarctica @@ -87,34 +87,34 @@ # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Antarctica/Casey 0 - -00 1969 - 8:00 - +08 2009 Oct 18 2:00 - 11:00 - +11 2010 Mar 5 2:00 - 8:00 - +08 2011 Oct 28 2:00 - 11:00 - +11 2012 Feb 21 17:00u - 8:00 - +08 2016 Oct 22 - 11:00 - +11 2018 Mar 11 4:00 - 8:00 - +08 2018 Oct 7 4:00 - 11:00 - +11 2019 Mar 17 3:00 - 8:00 - +08 2019 Oct 4 3:00 - 11:00 - +11 2020 Mar 8 3:00 - 8:00 - +08 2020 Oct 4 0:01 - 11:00 - +11 2021 Mar 14 0:00 - 8:00 - +08 2021 Oct 3 0:01 - 11:00 - +11 2022 Mar 13 0:00 - 8:00 - +08 2022 Oct 2 0:01 - 11:00 - +11 2023 Mar 9 3:00 - 8:00 - +08 + 8:00 - %z 2009 Oct 18 2:00 + 11:00 - %z 2010 Mar 5 2:00 + 8:00 - %z 2011 Oct 28 2:00 + 11:00 - %z 2012 Feb 21 17:00u + 8:00 - %z 2016 Oct 22 + 11:00 - %z 2018 Mar 11 4:00 + 8:00 - %z 2018 Oct 7 4:00 + 11:00 - %z 2019 Mar 17 3:00 + 8:00 - %z 2019 Oct 4 3:00 + 11:00 - %z 2020 Mar 8 3:00 + 8:00 - %z 2020 Oct 4 0:01 + 11:00 - %z 2021 Mar 14 0:00 + 8:00 - %z 2021 Oct 3 0:01 + 11:00 - %z 2022 Mar 13 0:00 + 8:00 - %z 2022 Oct 2 0:01 + 11:00 - %z 2023 Mar 9 3:00 + 8:00 - %z Zone Antarctica/Davis 0 - -00 1957 Jan 13 - 7:00 - +07 1964 Nov + 7:00 - %z 1964 Nov 0 - -00 1969 Feb - 7:00 - +07 2009 Oct 18 2:00 - 5:00 - +05 2010 Mar 10 20:00u - 7:00 - +07 2011 Oct 28 2:00 - 5:00 - +05 2012 Feb 21 20:00u - 7:00 - +07 + 7:00 - %z 2009 Oct 18 2:00 + 5:00 - %z 2010 Mar 10 20:00u + 7:00 - %z 2011 Oct 28 2:00 + 5:00 - %z 2012 Feb 21 20:00u + 7:00 - %z Zone Antarctica/Mawson 0 - -00 1954 Feb 13 - 6:00 - +06 2009 Oct 18 2:00 - 5:00 - +05 + 6:00 - %z 2009 Oct 18 2:00 + 5:00 - %z # References: # Casey Weather (1998-02-26) # http://www.antdiv.gov.au/aad/exop/sfo/casey/casey_aws.html @@ -290,10 +290,10 @@ Zone Antarctica/Troll 0 - -00 2005 Feb 12 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Antarctica/Vostok 0 - -00 1957 Dec 16 - 7:00 - +07 1994 Feb + 7:00 - %z 1994 Feb 0 - -00 1994 Nov - 7:00 - +07 2023 Dec 18 2:00 - 5:00 - +05 + 7:00 - %z 2023 Dec 18 2:00 + 5:00 - %z # S Africa - year-round bases # Marion Island, -4653+03752 @@ -326,7 +326,7 @@ Zone Antarctica/Vostok 0 - -00 1957 Dec 16 # # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Antarctica/Rothera 0 - -00 1976 Dec 1 - -3:00 - -03 + -3:00 - %z # Uruguay - year round base # Artigas, King George Island, -621104-0585107 @@ -83,8 +83,8 @@ Rule RussiaAsia 1996 2010 - Oct lastSun 2:00s 0 - # Afghanistan # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Asia/Kabul 4:36:48 - LMT 1890 - 4:00 - +04 1945 - 4:30 - +0430 + 4:00 - %z 1945 + 4:30 - %z # Armenia # From Paul Eggert (2006-03-22): @@ -116,12 +116,12 @@ Rule Armenia 2011 only - Mar lastSun 2:00s 1:00 - Rule Armenia 2011 only - Oct lastSun 2:00s 0 - # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Asia/Yerevan 2:58:00 - LMT 1924 May 2 - 3:00 - +03 1957 Mar - 4:00 RussiaAsia +04/+05 1991 Mar 31 2:00s - 3:00 RussiaAsia +03/+04 1995 Sep 24 2:00s - 4:00 - +04 1997 - 4:00 RussiaAsia +04/+05 2011 - 4:00 Armenia +04/+05 + 3:00 - %z 1957 Mar + 4:00 RussiaAsia %z 1991 Mar 31 2:00s + 3:00 RussiaAsia %z 1995 Sep 24 2:00s + 4:00 - %z 1997 + 4:00 RussiaAsia %z 2011 + 4:00 Armenia %z # Azerbaijan @@ -142,12 +142,12 @@ Rule Azer 1997 2015 - Mar lastSun 4:00 1:00 - Rule Azer 1997 2015 - Oct lastSun 5:00 0 - # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Asia/Baku 3:19:24 - LMT 1924 May 2 - 3:00 - +03 1957 Mar - 4:00 RussiaAsia +04/+05 1991 Mar 31 2:00s - 3:00 RussiaAsia +03/+04 1992 Sep lastSun 2:00s - 4:00 - +04 1996 - 4:00 EUAsia +04/+05 1997 - 4:00 Azer +04/+05 + 3:00 - %z 1957 Mar + 4:00 RussiaAsia %z 1991 Mar 31 2:00s + 3:00 RussiaAsia %z 1992 Sep lastSun 2:00s + 4:00 - %z 1996 + 4:00 EUAsia %z 1997 + 4:00 Azer %z # Bangladesh # From Alexander Krivenyshev (2009-05-13): @@ -228,17 +228,17 @@ Rule Dhaka 2009 only - Dec 31 24:00 0 - # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Asia/Dhaka 6:01:40 - LMT 1890 5:53:20 - HMT 1941 Oct # Howrah Mean Time? - 6:30 - +0630 1942 May 15 - 5:30 - +0530 1942 Sep - 6:30 - +0630 1951 Sep 30 - 6:00 - +06 2009 - 6:00 Dhaka +06/+07 + 6:30 - %z 1942 May 15 + 5:30 - %z 1942 Sep + 6:30 - %z 1951 Sep 30 + 6:00 - %z 2009 + 6:00 Dhaka %z # Bhutan # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Asia/Thimphu 5:58:36 - LMT 1947 Aug 15 # or Thimbu - 5:30 - +0530 1987 Oct - 6:00 - +06 + 5:30 - %z 1987 Oct + 6:00 - %z # British Indian Ocean Territory # Whitman and the 1995 CIA time zone map say 5:00, but the @@ -248,8 +248,8 @@ Zone Asia/Thimphu 5:58:36 - LMT 1947 Aug 15 # or Thimbu # then contained the Chagos Archipelago). # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Indian/Chagos 4:49:40 - LMT 1907 - 5:00 - +05 1996 - 6:00 - +06 + 5:00 - %z 1996 + 6:00 - %z # Cocos (Keeling) Islands # Myanmar (Burma) @@ -265,9 +265,9 @@ Zone Indian/Chagos 4:49:40 - LMT 1907 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Asia/Yangon 6:24:47 - LMT 1880 # or Rangoon 6:24:47 - RMT 1920 # Rangoon local time - 6:30 - +0630 1942 May - 9:00 - +09 1945 May 3 - 6:30 - +0630 + 6:30 - %z 1942 May + 9:00 - %z 1945 May 3 + 6:30 - %z # China @@ -656,7 +656,7 @@ Zone Asia/Shanghai 8:05:43 - LMT 1901 # Xinjiang time, used by many in western China; represented by Ürümqi / Ürümchi # / Wulumuqi. (Please use Asia/Shanghai if you prefer Beijing time.) Zone Asia/Urumqi 5:50:20 - LMT 1928 - 6:00 - +06 + 6:00 - %z # Hong Kong @@ -1114,7 +1114,7 @@ Rule Macau 1979 only - Oct Sun>=16 03:30 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Asia/Macau 7:34:10 - LMT 1904 Oct 30 8:00 - CST 1941 Dec 21 23:00 - 9:00 Macau +09/+10 1945 Sep 30 24:00 + 9:00 Macau %z 1945 Sep 30 24:00 8:00 Macau C%sT @@ -1157,7 +1157,7 @@ Zone Asia/Nicosia 2:13:28 - LMT 1921 Nov 14 Zone Asia/Famagusta 2:15:48 - LMT 1921 Nov 14 2:00 Cyprus EE%sT 1998 Sep 2:00 EUAsia EE%sT 2016 Sep 8 - 3:00 - +03 2017 Oct 29 1:00u + 3:00 - %z 2017 Oct 29 1:00u 2:00 EUAsia EE%sT # Georgia @@ -1198,18 +1198,25 @@ Zone Asia/Famagusta 2:15:48 - LMT 1921 Nov 14 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Asia/Tbilisi 2:59:11 - LMT 1880 2:59:11 - TBMT 1924 May 2 # Tbilisi Mean Time - 3:00 - +03 1957 Mar - 4:00 RussiaAsia +04/+05 1991 Mar 31 2:00s - 3:00 RussiaAsia +03/+04 1992 - 3:00 E-EurAsia +03/+04 1994 Sep lastSun - 4:00 E-EurAsia +04/+05 1996 Oct lastSun - 4:00 1:00 +05 1997 Mar lastSun - 4:00 E-EurAsia +04/+05 2004 Jun 27 - 3:00 RussiaAsia +03/+04 2005 Mar lastSun 2:00 - 4:00 - +04 + 3:00 - %z 1957 Mar + 4:00 RussiaAsia %z 1991 Mar 31 2:00s + 3:00 RussiaAsia %z 1992 + 3:00 E-EurAsia %z 1994 Sep lastSun + 4:00 E-EurAsia %z 1996 Oct lastSun + 4:00 1:00 %z 1997 Mar lastSun + 4:00 E-EurAsia %z 2004 Jun 27 + 3:00 RussiaAsia %z 2005 Mar lastSun 2:00 + 4:00 - %z # East Timor +# From Tim Parenti (2024-07-01): +# The 1912-01-01 transition occurred at 00:00 new time, per the 1911-05-24 +# Portuguese decree (see Europe/Lisbon). A provision in article 5(c) of the +# decree prescribed that Timor "will keep counting time in harmony with +# neighboring foreign colonies, [for] as long as they do not adopt the time +# that belongs to them in [the Washington Convention] system." + # See Indonesia for the 1945 transition. # From João Carrascalão, brother of the former governor of East Timor, in @@ -1233,11 +1240,11 @@ Zone Asia/Tbilisi 2:59:11 - LMT 1880 # midnight on Saturday, September 16. # Zone NAME STDOFF RULES FORMAT [UNTIL] -Zone Asia/Dili 8:22:20 - LMT 1912 Jan 1 - 8:00 - +08 1942 Feb 21 23:00 - 9:00 - +09 1976 May 3 - 8:00 - +08 2000 Sep 17 0:00 - 9:00 - +09 +Zone Asia/Dili 8:22:20 - LMT 1911 Dec 31 16:00u + 8:00 - %z 1942 Feb 21 23:00 + 9:00 - %z 1976 May 3 + 8:00 - %z 2000 Sep 17 0:00 + 9:00 - %z # India @@ -1303,9 +1310,9 @@ Zone Asia/Kolkata 5:53:28 - LMT 1854 Jun 28 # Kolkata 5:53:20 - HMT 1870 # Howrah Mean Time? 5:21:10 - MMT 1906 Jan 1 # Madras local time 5:30 - IST 1941 Oct - 5:30 1:00 +0630 1942 May 15 + 5:30 1:00 %z 1942 May 15 5:30 - IST 1942 Sep - 5:30 1:00 +0630 1945 Oct 15 + 5:30 1:00 %z 1945 Oct 15 5:30 - IST # Since 1970 the following are like Asia/Kolkata: # Andaman Is @@ -1357,33 +1364,33 @@ Zone Asia/Jakarta 7:07:12 - LMT 1867 Aug 10 # Shanks & Pottenger say the next transition was at 1924 Jan 1 0:13, # but this must be a typo. 7:07:12 - BMT 1923 Dec 31 16:40u # Batavia - 7:20 - +0720 1932 Nov - 7:30 - +0730 1942 Mar 23 - 9:00 - +09 1945 Sep 23 - 7:30 - +0730 1948 May - 8:00 - +08 1950 May - 7:30 - +0730 1964 + 7:20 - %z 1932 Nov + 7:30 - %z 1942 Mar 23 + 9:00 - %z 1945 Sep 23 + 7:30 - %z 1948 May + 8:00 - %z 1950 May + 7:30 - %z 1964 7:00 - WIB # west and central Borneo Zone Asia/Pontianak 7:17:20 - LMT 1908 May 7:17:20 - PMT 1932 Nov # Pontianak MT - 7:30 - +0730 1942 Jan 29 - 9:00 - +09 1945 Sep 23 - 7:30 - +0730 1948 May - 8:00 - +08 1950 May - 7:30 - +0730 1964 + 7:30 - %z 1942 Jan 29 + 9:00 - %z 1945 Sep 23 + 7:30 - %z 1948 May + 8:00 - %z 1950 May + 7:30 - %z 1964 8:00 - WITA 1988 Jan 1 7:00 - WIB # Sulawesi, Lesser Sundas, east and south Borneo Zone Asia/Makassar 7:57:36 - LMT 1920 7:57:36 - MMT 1932 Nov # Macassar MT - 8:00 - +08 1942 Feb 9 - 9:00 - +09 1945 Sep 23 + 8:00 - %z 1942 Feb 9 + 9:00 - %z 1945 Sep 23 8:00 - WITA # Maluku Islands, West Papua, Papua Zone Asia/Jayapura 9:22:48 - LMT 1932 Nov - 9:00 - +09 1944 Sep 1 - 9:30 - +0930 1964 + 9:00 - %z 1944 Sep 1 + 9:30 - %z 1964 9:00 - WIT # Iran @@ -1619,9 +1626,9 @@ Rule Iran 2021 2022 - Sep 21 24:00 0 - # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Asia/Tehran 3:25:44 - LMT 1916 3:25:44 - TMT 1935 Jun 13 # Tehran Mean Time - 3:30 Iran +0330/+0430 1977 Oct 20 24:00 - 4:00 Iran +04/+05 1979 - 3:30 Iran +0330/+0430 + 3:30 Iran %z 1977 Oct 20 24:00 + 4:00 Iran %z 1979 + 3:30 Iran %z # Iraq @@ -1664,8 +1671,8 @@ Rule Iraq 1991 2007 - Oct 1 3:00s 0 - # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Asia/Baghdad 2:57:40 - LMT 1890 2:57:36 - BMT 1918 # Baghdad Mean Time? - 3:00 - +03 1982 May - 3:00 Iraq +03/+04 + 3:00 - %z 1982 May + 3:00 Iraq %z ############################################################################### @@ -2262,7 +2269,7 @@ Rule Jordan 2022 only - Feb lastThu 24:00 1:00 S # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Asia/Amman 2:23:44 - LMT 1931 2:00 Jordan EE%sT 2022 Oct 28 0:00s - 3:00 - +03 + 3:00 - %z # Kazakhstan @@ -2473,88 +2480,88 @@ Zone Asia/Amman 2:23:44 - LMT 1931 # Almaty (formerly Alma-Ata), representing most locations in Kazakhstan # This includes Abai/Abay (ISO 3166-2 code KZ-10), Aqmola/Akmola (KZ-11), # Almaty (KZ-19), Almaty city (KZ-75), Astana city (KZ-71), -# East Kazkhstan (KZ-63), Jambyl/Zhambyl (KZ-31), Jetisu/Zhetysu (KZ-33), +# East Kazakhstan (KZ-63), Jambyl/Zhambyl (KZ-31), Jetisu/Zhetysu (KZ-33), # Karaganda (KZ-35), North Kazakhstan (KZ-59), Pavlodar (KZ-55), -# Shyumkent city (KZ-79), Turkistan (KZ-61), and Ulytau (KZ-62). +# Shymkent city (KZ-79), Turkistan (KZ-61), and Ulytau (KZ-62). Zone Asia/Almaty 5:07:48 - LMT 1924 May 2 # or Alma-Ata - 5:00 - +05 1930 Jun 21 - 6:00 RussiaAsia +06/+07 1991 Mar 31 2:00s - 5:00 RussiaAsia +05/+06 1992 Jan 19 2:00s - 6:00 RussiaAsia +06/+07 2004 Oct 31 2:00s - 6:00 - +06 2024 Mar 1 0:00 - 5:00 - +05 + 5:00 - %z 1930 Jun 21 + 6:00 RussiaAsia %z 1991 Mar 31 2:00s + 5:00 RussiaAsia %z 1992 Jan 19 2:00s + 6:00 RussiaAsia %z 2004 Oct 31 2:00s + 6:00 - %z 2024 Mar 1 0:00 + 5:00 - %z # Qyzylorda (aka Kyzylorda, Kizilorda, Kzyl-Orda, etc.) (KZ-43) Zone Asia/Qyzylorda 4:21:52 - LMT 1924 May 2 - 4:00 - +04 1930 Jun 21 - 5:00 - +05 1981 Apr 1 - 5:00 1:00 +06 1981 Oct 1 - 6:00 - +06 1982 Apr 1 - 5:00 RussiaAsia +05/+06 1991 Mar 31 2:00s - 4:00 RussiaAsia +04/+05 1991 Sep 29 2:00s - 5:00 RussiaAsia +05/+06 1992 Jan 19 2:00s - 6:00 RussiaAsia +06/+07 1992 Mar 29 2:00s - 5:00 RussiaAsia +05/+06 2004 Oct 31 2:00s - 6:00 - +06 2018 Dec 21 0:00 - 5:00 - +05 + 4:00 - %z 1930 Jun 21 + 5:00 - %z 1981 Apr 1 + 5:00 1:00 %z 1981 Oct 1 + 6:00 - %z 1982 Apr 1 + 5:00 RussiaAsia %z 1991 Mar 31 2:00s + 4:00 RussiaAsia %z 1991 Sep 29 2:00s + 5:00 RussiaAsia %z 1992 Jan 19 2:00s + 6:00 RussiaAsia %z 1992 Mar 29 2:00s + 5:00 RussiaAsia %z 2004 Oct 31 2:00s + 6:00 - %z 2018 Dec 21 0:00 + 5:00 - %z # Qostanay (aka Kostanay, Kustanay) (KZ-39) # The 1991/2 rules are unclear partly because of the 1997 Turgai # reorganization. Zone Asia/Qostanay 4:14:28 - LMT 1924 May 2 - 4:00 - +04 1930 Jun 21 - 5:00 - +05 1981 Apr 1 - 5:00 1:00 +06 1981 Oct 1 - 6:00 - +06 1982 Apr 1 - 5:00 RussiaAsia +05/+06 1991 Mar 31 2:00s - 4:00 RussiaAsia +04/+05 1992 Jan 19 2:00s - 5:00 RussiaAsia +05/+06 2004 Oct 31 2:00s - 6:00 - +06 2024 Mar 1 0:00 - 5:00 - +05 + 4:00 - %z 1930 Jun 21 + 5:00 - %z 1981 Apr 1 + 5:00 1:00 %z 1981 Oct 1 + 6:00 - %z 1982 Apr 1 + 5:00 RussiaAsia %z 1991 Mar 31 2:00s + 4:00 RussiaAsia %z 1992 Jan 19 2:00s + 5:00 RussiaAsia %z 2004 Oct 31 2:00s + 6:00 - %z 2024 Mar 1 0:00 + 5:00 - %z # Aqtöbe (aka Aktobe, formerly Aktyubinsk) (KZ-15) Zone Asia/Aqtobe 3:48:40 - LMT 1924 May 2 - 4:00 - +04 1930 Jun 21 - 5:00 - +05 1981 Apr 1 - 5:00 1:00 +06 1981 Oct 1 - 6:00 - +06 1982 Apr 1 - 5:00 RussiaAsia +05/+06 1991 Mar 31 2:00s - 4:00 RussiaAsia +04/+05 1992 Jan 19 2:00s - 5:00 RussiaAsia +05/+06 2004 Oct 31 2:00s - 5:00 - +05 + 4:00 - %z 1930 Jun 21 + 5:00 - %z 1981 Apr 1 + 5:00 1:00 %z 1981 Oct 1 + 6:00 - %z 1982 Apr 1 + 5:00 RussiaAsia %z 1991 Mar 31 2:00s + 4:00 RussiaAsia %z 1992 Jan 19 2:00s + 5:00 RussiaAsia %z 2004 Oct 31 2:00s + 5:00 - %z # Mangghystaū (KZ-47) # Aqtau was not founded until 1963, but it represents an inhabited region, # so include timestamps before 1963. Zone Asia/Aqtau 3:21:04 - LMT 1924 May 2 - 4:00 - +04 1930 Jun 21 - 5:00 - +05 1981 Oct 1 - 6:00 - +06 1982 Apr 1 - 5:00 RussiaAsia +05/+06 1991 Mar 31 2:00s - 4:00 RussiaAsia +04/+05 1992 Jan 19 2:00s - 5:00 RussiaAsia +05/+06 1994 Sep 25 2:00s - 4:00 RussiaAsia +04/+05 2004 Oct 31 2:00s - 5:00 - +05 + 4:00 - %z 1930 Jun 21 + 5:00 - %z 1981 Oct 1 + 6:00 - %z 1982 Apr 1 + 5:00 RussiaAsia %z 1991 Mar 31 2:00s + 4:00 RussiaAsia %z 1992 Jan 19 2:00s + 5:00 RussiaAsia %z 1994 Sep 25 2:00s + 4:00 RussiaAsia %z 2004 Oct 31 2:00s + 5:00 - %z # Atyraū (KZ-23) is like Mangghystaū except it switched from # +04/+05 to +05/+06 in spring 1999, not fall 1994. Zone Asia/Atyrau 3:27:44 - LMT 1924 May 2 - 3:00 - +03 1930 Jun 21 - 5:00 - +05 1981 Oct 1 - 6:00 - +06 1982 Apr 1 - 5:00 RussiaAsia +05/+06 1991 Mar 31 2:00s - 4:00 RussiaAsia +04/+05 1992 Jan 19 2:00s - 5:00 RussiaAsia +05/+06 1999 Mar 28 2:00s - 4:00 RussiaAsia +04/+05 2004 Oct 31 2:00s - 5:00 - +05 + 3:00 - %z 1930 Jun 21 + 5:00 - %z 1981 Oct 1 + 6:00 - %z 1982 Apr 1 + 5:00 RussiaAsia %z 1991 Mar 31 2:00s + 4:00 RussiaAsia %z 1992 Jan 19 2:00s + 5:00 RussiaAsia %z 1999 Mar 28 2:00s + 4:00 RussiaAsia %z 2004 Oct 31 2:00s + 5:00 - %z # West Kazakhstan (KZ-27) # From Paul Eggert (2016-03-18): # The 1989 transition is from USSR act No. 227 (1989-03-14). Zone Asia/Oral 3:25:24 - LMT 1924 May 2 # or Ural'sk - 3:00 - +03 1930 Jun 21 - 5:00 - +05 1981 Apr 1 - 5:00 1:00 +06 1981 Oct 1 - 6:00 - +06 1982 Apr 1 - 5:00 RussiaAsia +05/+06 1989 Mar 26 2:00s - 4:00 RussiaAsia +04/+05 1992 Jan 19 2:00s - 5:00 RussiaAsia +05/+06 1992 Mar 29 2:00s - 4:00 RussiaAsia +04/+05 2004 Oct 31 2:00s - 5:00 - +05 + 3:00 - %z 1930 Jun 21 + 5:00 - %z 1981 Apr 1 + 5:00 1:00 %z 1981 Oct 1 + 6:00 - %z 1982 Apr 1 + 5:00 RussiaAsia %z 1989 Mar 26 2:00s + 4:00 RussiaAsia %z 1992 Jan 19 2:00s + 5:00 RussiaAsia %z 1992 Mar 29 2:00s + 4:00 RussiaAsia %z 2004 Oct 31 2:00s + 5:00 - %z # Kyrgyzstan (Kirgizstan) # Transitions through 1991 are from Shanks & Pottenger. @@ -2575,11 +2582,11 @@ Rule Kyrgyz 1997 2005 - Mar lastSun 2:30 1:00 - Rule Kyrgyz 1997 2004 - Oct lastSun 2:30 0 - # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Asia/Bishkek 4:58:24 - LMT 1924 May 2 - 5:00 - +05 1930 Jun 21 - 6:00 RussiaAsia +06/+07 1991 Mar 31 2:00s - 5:00 RussiaAsia +05/+06 1991 Aug 31 2:00 - 5:00 Kyrgyz +05/+06 2005 Aug 12 - 6:00 - +06 + 5:00 - %z 1930 Jun 21 + 6:00 RussiaAsia %z 1991 Mar 31 2:00s + 5:00 RussiaAsia %z 1991 Aug 31 2:00 + 5:00 Kyrgyz %z 2005 Aug 12 + 6:00 - %z ############################################################################### @@ -2786,16 +2793,16 @@ Rule NBorneo 1935 1941 - Dec 14 0:00 0 - # and 1982 transition dates are from Mok Ly Yng. # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Asia/Kuching 7:21:20 - LMT 1926 Mar - 7:30 - +0730 1933 - 8:00 NBorneo +08/+0820 1942 Feb 16 - 9:00 - +09 1945 Sep 12 - 8:00 - +08 + 7:30 - %z 1933 + 8:00 NBorneo %z 1942 Feb 16 + 9:00 - %z 1945 Sep 12 + 8:00 - %z # Maldives # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Indian/Maldives 4:54:00 - LMT 1880 # Malé 4:54:00 - MMT 1960 # Malé Mean Time - 5:00 - +05 + 5:00 - %z # Mongolia @@ -2897,9 +2904,37 @@ Zone Indian/Maldives 4:54:00 - LMT 1880 # Malé # From Arthur David Olson (2008-05-19): # Assume that Choibalsan is indeed offset by 8:00. -# XXX--in the absence of better information, assume that transition -# was at the start of 2008-03-31 (the day of Steffen Thorsen's report); -# this is almost surely wrong. + +# From Heitor David Pinto (2024-06-23): +# Sources about time zones in Mongolia seem to list one of two conflicting +# configurations. The first configuration, mentioned in a comment to the TZ +# database in 1999, citing a Mongolian government website, lists the provinces +# of Bayan-Ölgii, Khovd and Uvs in UTC+7, and the rest of the country in +# UTC+8. The second configuration, mentioned in a comment to the database in +# 2001, lists Bayan-Ölgii, Khovd, Uvs, Govi-Altai and Zavkhan in UTC+7, Dornod +# and Sükhbaatar in UTC+9, and the rest of the country in UTC+8. +# +# The first configuration is still mentioned by several Mongolian travel +# agencies: +# https://www.adventurerider.mn/en/page/about_mongolia +# http://www.naturetours.mn/nt/mongolia.php +# https://www.newjuulchin.mn/web/content/7506?unique=fa24a0f6e96e022a3578ee5195ac879638c734ce +# +# It also matches these flight schedules in 2013: +# http://web.archive.org/web/20130722023600/https://www.hunnuair.com/en/timetabled +# The flight times imply that the airports of Uliastai (Zavkhan), Choibalsan +# (Dornod) and Altai (Govi-Altai) are in the same time zone as Ulaanbaatar, +# and Khovd is one hour behind.... +# +# The second configuration was mentioned by an official of the Mongolian +# standards agency in an interview in 2014: https://ikon.mn/n/9v6 +# And it's still listed by the Mongolian aviation agency: +# https://ais.mn/files/aip/eAIP/2023-12-25/html/eSUP/ZM-eSUP-23-04-en-MN.html +# +# ... I believe that the first configuration is what is actually observed in +# Mongolia and has been so all along, at least since 1999. The second +# configuration closely matches the ideal time zone boundaries at 97.5° E and +# 112.5° E but it doesn't seem to be used in practice. # From Ganbold Tsagaankhuu (2015-03-10): # It seems like yesterday Mongolian Government meeting has concluded to use @@ -2938,25 +2973,18 @@ Rule Mongol 2015 2016 - Sep lastSat 0:00 0 - # Zone NAME STDOFF RULES FORMAT [UNTIL] # Hovd, a.k.a. Chovd, Dund-Us, Dzhargalant, Khovd, Jirgalanta Zone Asia/Hovd 6:06:36 - LMT 1905 Aug - 6:00 - +06 1978 - 7:00 Mongol +07/+08 + 6:00 - %z 1978 + 7:00 Mongol %z # Ulaanbaatar, a.k.a. Ulan Bataar, Ulan Bator, Urga Zone Asia/Ulaanbaatar 7:07:32 - LMT 1905 Aug - 7:00 - +07 1978 - 8:00 Mongol +08/+09 -# Choibalsan, a.k.a. Bajan Tümen, Bajan Tumen, Chojbalsan, -# Choybalsan, Sanbejse, Tchoibalsan -Zone Asia/Choibalsan 7:38:00 - LMT 1905 Aug - 7:00 - +07 1978 - 8:00 - +08 1983 Apr - 9:00 Mongol +09/+10 2008 Mar 31 - 8:00 Mongol +08/+09 + 7:00 - %z 1978 + 8:00 Mongol %z # Nepal # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Asia/Kathmandu 5:41:16 - LMT 1920 - 5:30 - +0530 1986 - 5:45 - +0545 + 5:30 - %z 1986 + 5:45 - %z # Pakistan @@ -3102,10 +3130,10 @@ Rule Pakistan 2009 only - Apr 15 0:00 1:00 S # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Asia/Karachi 4:28:12 - LMT 1907 - 5:30 - +0530 1942 Sep - 5:30 1:00 +0630 1945 Oct 15 - 5:30 - +0530 1951 Sep 30 - 5:00 - +05 1971 Mar 26 + 5:30 - %z 1942 Sep + 5:30 1:00 %z 1945 Oct 15 + 5:30 - %z 1951 Sep 30 + 5:00 - %z 1971 Mar 26 5:00 Pakistan PK%sT # Pakistan Time # Palestine @@ -3653,14 +3681,14 @@ Zone Asia/Hebron 2:20:23 - LMT 1900 Oct # Philippine Star 2014-08-05 # http://www.philstar.com/headlines/2014/08/05/1354152/pnoy-urged-declare-use-daylight-saving-time -# From Paul Goyette (2018-06-15): +# From Paul Goyette (2018-06-15) with URLs updated by Guy Harris (2024-02-15): # In the Philippines, there is a national law, Republic Act No. 10535 # which declares the official time here as "Philippine Standard Time". # The act [1] even specifies use of PST as the abbreviation, although # the FAQ provided by PAGASA [2] uses the "acronym PhST to distinguish # it from the Pacific Standard Time (PST)." -# [1] http://www.officialgazette.gov.ph/2013/05/15/republic-act-no-10535/ -# [2] https://www1.pagasa.dost.gov.ph/index.php/astronomy/philippine-standard-time#republic-act-10535 +# [1] https://www.officialgazette.gov.ph/2013/05/15/republic-act-no-10535/ +# [2] https://prsd.pagasa.dost.gov.ph/index.php/28-astronomy/302-philippine-standard-time # # From Paul Eggert (2018-06-19): # I surveyed recent news reports, and my impression is that "PST" is @@ -3693,8 +3721,8 @@ Zone Asia/Manila -15:56:00 - LMT 1844 Dec 31 # Qatar # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Asia/Qatar 3:26:08 - LMT 1920 # Al Dawhah / Doha - 4:00 - +04 1972 Jun - 3:00 - +03 + 4:00 - %z 1972 Jun + 3:00 - %z # Kuwait # Saudi Arabia @@ -3744,7 +3772,7 @@ Zone Asia/Qatar 3:26:08 - LMT 1920 # Al Dawhah / Doha # # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Asia/Riyadh 3:06:52 - LMT 1947 Mar 14 - 3:00 - +03 + 3:00 - %z # Singapore # taken from Mok Ly Yng (2003-10-30) @@ -3752,13 +3780,13 @@ Zone Asia/Riyadh 3:06:52 - LMT 1947 Mar 14 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Asia/Singapore 6:55:25 - LMT 1901 Jan 1 6:55:25 - SMT 1905 Jun 1 # Singapore M.T. - 7:00 - +07 1933 Jan 1 - 7:00 0:20 +0720 1936 Jan 1 - 7:20 - +0720 1941 Sep 1 - 7:30 - +0730 1942 Feb 16 - 9:00 - +09 1945 Sep 12 - 7:30 - +0730 1981 Dec 31 16:00u - 8:00 - +08 + 7:00 - %z 1933 Jan 1 + 7:00 0:20 %z 1936 Jan 1 + 7:20 - %z 1941 Sep 1 + 7:30 - %z 1942 Feb 16 + 9:00 - %z 1945 Sep 12 + 7:30 - %z 1981 Dec 31 16:00u + 8:00 - %z # Spratly Is # no information @@ -3816,13 +3844,13 @@ Zone Asia/Singapore 6:55:25 - LMT 1901 Jan 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Asia/Colombo 5:19:24 - LMT 1880 5:19:32 - MMT 1906 # Moratuwa Mean Time - 5:30 - +0530 1942 Jan 5 - 5:30 0:30 +06 1942 Sep - 5:30 1:00 +0630 1945 Oct 16 2:00 - 5:30 - +0530 1996 May 25 0:00 - 6:30 - +0630 1996 Oct 26 0:30 - 6:00 - +06 2006 Apr 15 0:30 - 5:30 - +0530 + 5:30 - %z 1942 Jan 5 + 5:30 0:30 %z 1942 Sep + 5:30 1:00 %z 1945 Oct 16 2:00 + 5:30 - %z 1996 May 25 0:00 + 6:30 - %z 1996 Oct 26 0:30 + 6:00 - %z 2006 Apr 15 0:30 + 5:30 - %z # Syria # Rule NAME FROM TO - IN ON AT SAVE LETTER/S @@ -3993,16 +4021,16 @@ Rule Syria 2009 2022 - Oct lastFri 0:00 0 - # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Asia/Damascus 2:25:12 - LMT 1920 # Dimashq 2:00 Syria EE%sT 2022 Oct 28 0:00 - 3:00 - +03 + 3:00 - %z # Tajikistan # From Shanks & Pottenger. # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Asia/Dushanbe 4:35:12 - LMT 1924 May 2 - 5:00 - +05 1930 Jun 21 - 6:00 RussiaAsia +06/+07 1991 Mar 31 2:00s - 5:00 1:00 +06 1991 Sep 9 2:00s - 5:00 - +05 + 5:00 - %z 1930 Jun 21 + 6:00 RussiaAsia %z 1991 Mar 31 2:00s + 5:00 1:00 %z 1991 Sep 9 2:00s + 5:00 - %z # Cambodia # Christmas I @@ -4012,16 +4040,16 @@ Zone Asia/Dushanbe 4:35:12 - LMT 1924 May 2 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Asia/Bangkok 6:42:04 - LMT 1880 6:42:04 - BMT 1920 Apr # Bangkok Mean Time - 7:00 - +07 + 7:00 - %z # Turkmenistan # From Shanks & Pottenger. # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Asia/Ashgabat 3:53:32 - LMT 1924 May 2 # or Ashkhabad - 4:00 - +04 1930 Jun 21 - 5:00 RussiaAsia +05/+06 1991 Mar 31 2:00 - 4:00 RussiaAsia +04/+05 1992 Jan 19 2:00 - 5:00 - +05 + 4:00 - %z 1930 Jun 21 + 5:00 RussiaAsia %z 1991 Mar 31 2:00 + 4:00 RussiaAsia %z 1992 Jan 19 2:00 + 5:00 - %z # Oman # Réunion @@ -4031,25 +4059,25 @@ Zone Asia/Ashgabat 3:53:32 - LMT 1924 May 2 # or Ashkhabad # The Crozet Is also observe Réunion time; see the 'antarctica' file. # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Asia/Dubai 3:41:12 - LMT 1920 - 4:00 - +04 + 4:00 - %z # Uzbekistan # Byalokoz 1919 says Uzbekistan was 4:27:53. # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Asia/Samarkand 4:27:53 - LMT 1924 May 2 - 4:00 - +04 1930 Jun 21 - 5:00 - +05 1981 Apr 1 - 5:00 1:00 +06 1981 Oct 1 - 6:00 - +06 1982 Apr 1 - 5:00 RussiaAsia +05/+06 1992 - 5:00 - +05 + 4:00 - %z 1930 Jun 21 + 5:00 - %z 1981 Apr 1 + 5:00 1:00 %z 1981 Oct 1 + 6:00 - %z 1982 Apr 1 + 5:00 RussiaAsia %z 1992 + 5:00 - %z # Milne says Tashkent was 4:37:10.8. #STDOFF 4:37:10.8 Zone Asia/Tashkent 4:37:11 - LMT 1924 May 2 - 5:00 - +05 1930 Jun 21 - 6:00 RussiaAsia +06/+07 1991 Mar 31 2:00 - 5:00 RussiaAsia +05/+06 1992 - 5:00 - +05 + 5:00 - %z 1930 Jun 21 + 6:00 RussiaAsia %z 1991 Mar 31 2:00 + 5:00 RussiaAsia %z 1992 + 5:00 - %z # Vietnam (southern) @@ -4107,7 +4135,7 @@ Zone Asia/Tashkent 4:37:11 - LMT 1924 May 2 # Võ Nguyên Giáp, Việt Nam Dân Quốc Công Báo, No. 1 (1945-09-29), page 13 # http://baochi.nlv.gov.vn/baochi/cgi-bin/baochi?a=d&d=JwvzO19450929.2.5&dliv=none # It says that on 1945-09-01 at 24:00, Vietnam moved back two hours, to +07. -# It also mentions a 1945-03-29 decree (by a Japanese Goveror-General) +# It also mentions a 1945-03-29 decree (by a Japanese Governor-General) # to set the time zone to +09, but does not say whether that decree # merely legalized an earlier change to +09. # @@ -4128,14 +4156,14 @@ Zone Asia/Tashkent 4:37:11 - LMT 1924 May 2 #STDOFF 7:06:30.13 Zone Asia/Ho_Chi_Minh 7:06:30 - LMT 1906 Jul 1 7:06:30 - PLMT 1911 May 1 # Phù Liễn MT - 7:00 - +07 1942 Dec 31 23:00 - 8:00 - +08 1945 Mar 14 23:00 - 9:00 - +09 1945 Sep 1 24:00 - 7:00 - +07 1947 Apr 1 - 8:00 - +08 1955 Jul 1 01:00 - 7:00 - +07 1959 Dec 31 23:00 - 8:00 - +08 1975 Jun 13 - 7:00 - +07 + 7:00 - %z 1942 Dec 31 23:00 + 8:00 - %z 1945 Mar 14 23:00 + 9:00 - %z 1945 Sep 1 24:00 + 7:00 - %z 1947 Apr 1 + 8:00 - %z 1955 Jul 1 01:00 + 7:00 - %z 1959 Dec 31 23:00 + 8:00 - %z 1975 Jun 13 + 7:00 - %z # From Paul Eggert (2019-02-19): # diff --git a/australasia b/australasia index 0e9c2592e4be..359f9c1f1e10 100644 --- a/australasia +++ b/australasia @@ -43,8 +43,8 @@ Zone Australia/Perth 7:43:24 - LMT 1895 Dec 8:00 Aus AW%sT 1943 Jul 8:00 AW AW%sT Zone Australia/Eucla 8:35:28 - LMT 1895 Dec - 8:45 Aus +0845/+0945 1943 Jul - 8:45 AW +0845/+0945 + 8:45 Aus %z 1943 Jul + 8:45 AW %z # Queensland # @@ -209,8 +209,8 @@ Rule LH 2008 max - Apr Sun>=1 2:00 0 - Rule LH 2008 max - Oct Sun>=1 2:00 0:30 - Zone Australia/Lord_Howe 10:36:20 - LMT 1895 Feb 10:00 - AEST 1981 Mar - 10:30 LH +1030/+1130 1985 Jul - 10:30 LH +1030/+11 + 10:30 LH %z 1985 Jul + 10:30 LH %z # Australian miscellany # @@ -416,16 +416,16 @@ Rule Fiji 2019 only - Nov Sun>=8 2:00 1:00 - Rule Fiji 2020 only - Dec 20 2:00 1:00 - # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Pacific/Fiji 11:55:44 - LMT 1915 Oct 26 # Suva - 12:00 Fiji +12/+13 + 12:00 Fiji %z # French Polynesia # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Pacific/Gambier -8:59:48 - LMT 1912 Oct 1 # Rikitea - -9:00 - -09 + -9:00 - %z Zone Pacific/Marquesas -9:18:00 - LMT 1912 Oct 1 - -9:30 - -0930 + -9:30 - %z Zone Pacific/Tahiti -9:58:16 - LMT 1912 Oct 1 # Papeete - -10:00 - -10 + -10:00 - %z # Clipperton (near North America) is administered from French Polynesia; # it is uninhabited. @@ -468,7 +468,7 @@ Rule Guam 1977 only - Aug 28 2:00 0 S Zone Pacific/Guam -14:21:00 - LMT 1844 Dec 31 9:39:00 - LMT 1901 # Agana 10:00 - GST 1941 Dec 10 # Guam - 9:00 - +09 1944 Jul 31 + 9:00 - %z 1944 Jul 31 10:00 Guam G%sT 2000 Dec 23 10:00 - ChST # Chamorro Standard Time @@ -480,30 +480,30 @@ Zone Pacific/Guam -14:21:00 - LMT 1844 Dec 31 # Wallis & Futuna # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Pacific/Tarawa 11:32:04 - LMT 1901 # Bairiki - 12:00 - +12 + 12:00 - %z # Kiribati (except Gilbert Is) # See Pacific/Tarawa for the Gilbert Is. # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Pacific/Kanton 0 - -00 1937 Aug 31 - -12:00 - -12 1979 Oct - -11:00 - -11 1994 Dec 31 - 13:00 - +13 + -12:00 - %z 1979 Oct + -11:00 - %z 1994 Dec 31 + 13:00 - %z Zone Pacific/Kiritimati -10:29:20 - LMT 1901 - -10:40 - -1040 1979 Oct - -10:00 - -10 1994 Dec 31 - 14:00 - +14 + -10:40 - %z 1979 Oct + -10:00 - %z 1994 Dec 31 + 14:00 - %z # Marshall Is # See Pacific/Tarawa for most locations. # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Pacific/Kwajalein 11:09:20 - LMT 1901 - 11:00 - +11 1937 - 10:00 - +10 1941 Apr 1 - 9:00 - +09 1944 Feb 6 - 11:00 - +11 1969 Oct - -12:00 - -12 1993 Aug 20 24:00 - 12:00 - +12 + 11:00 - %z 1937 + 10:00 - %z 1941 Apr 1 + 9:00 - %z 1944 Feb 6 + 11:00 - %z 1969 Oct + -12:00 - %z 1993 Aug 20 24:00 + 12:00 - %z # Micronesia # For Chuuk and Yap see Pacific/Port_Moresby. @@ -511,22 +511,22 @@ Zone Pacific/Kwajalein 11:09:20 - LMT 1901 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Pacific/Kosrae -13:08:04 - LMT 1844 Dec 31 10:51:56 - LMT 1901 - 11:00 - +11 1914 Oct - 9:00 - +09 1919 Feb 1 - 11:00 - +11 1937 - 10:00 - +10 1941 Apr 1 - 9:00 - +09 1945 Aug - 11:00 - +11 1969 Oct - 12:00 - +12 1999 - 11:00 - +11 + 11:00 - %z 1914 Oct + 9:00 - %z 1919 Feb 1 + 11:00 - %z 1937 + 10:00 - %z 1941 Apr 1 + 9:00 - %z 1945 Aug + 11:00 - %z 1969 Oct + 12:00 - %z 1999 + 11:00 - %z # Nauru # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Pacific/Nauru 11:07:40 - LMT 1921 Jan 15 # Uaobe - 11:30 - +1130 1942 Aug 29 - 9:00 - +09 1945 Sep 8 - 11:30 - +1130 1979 Feb 10 2:00 - 12:00 - +12 + 11:30 - %z 1942 Aug 29 + 9:00 - %z 1945 Sep 8 + 11:30 - %z 1979 Feb 10 2:00 + 12:00 - %z # New Caledonia # Rule NAME FROM TO - IN ON AT SAVE LETTER/S @@ -537,7 +537,7 @@ Rule NC 1996 only - Dec 1 2:00s 1:00 - Rule NC 1997 only - Mar 2 2:00s 0 - # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Pacific/Noumea 11:05:48 - LMT 1912 Jan 13 # Nouméa - 11:00 NC +11/+12 + 11:00 NC %z ############################################################################### @@ -581,8 +581,8 @@ Zone Pacific/Auckland 11:39:04 - LMT 1868 Nov 2 12:00 NZ NZ%sT Zone Pacific/Chatham 12:13:48 - LMT 1868 Nov 2 - 12:15 - +1215 1946 Jan 1 - 12:45 Chatham +1245/+1345 + 12:15 - %z 1946 Jan 1 + 12:45 Chatham %z # Auckland Is # uninhabited; Māori and Moriori, colonial settlers, pastoralists, sealers, @@ -635,8 +635,8 @@ Rule Cook 1979 1990 - Oct lastSun 0:00 0:30 - # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Pacific/Rarotonga 13:20:56 - LMT 1899 Dec 26 # Avarua -10:39:04 - LMT 1952 Oct 16 - -10:30 - -1030 1978 Nov 12 - -10:00 Cook -10/-0930 + -10:30 - %z 1978 Nov 12 + -10:00 Cook %z ############################################################################### @@ -653,30 +653,30 @@ Zone Pacific/Rarotonga 13:20:56 - LMT 1899 Dec 26 # Avarua # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Pacific/Niue -11:19:40 - LMT 1952 Oct 16 # Alofi - -11:20 - -1120 1964 Jul - -11:00 - -11 + -11:20 - %z 1964 Jul + -11:00 - %z # Norfolk # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Pacific/Norfolk 11:11:52 - LMT 1901 # Kingston - 11:12 - +1112 1951 - 11:30 - +1130 1974 Oct 27 02:00s - 11:30 1:00 +1230 1975 Mar 2 02:00s - 11:30 - +1130 2015 Oct 4 02:00s - 11:00 - +11 2019 Jul - 11:00 AN +11/+12 + 11:12 - %z 1951 + 11:30 - %z 1974 Oct 27 02:00s + 11:30 1:00 %z 1975 Mar 2 02:00s + 11:30 - %z 2015 Oct 4 02:00s + 11:00 - %z 2019 Jul + 11:00 AN %z # Palau (Belau) # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Pacific/Palau -15:02:04 - LMT 1844 Dec 31 # Koror 8:57:56 - LMT 1901 - 9:00 - +09 + 9:00 - %z # Papua New Guinea # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Pacific/Port_Moresby 9:48:40 - LMT 1880 9:48:32 - PMMT 1895 # Port Moresby Mean Time - 10:00 - +10 + 10:00 - %z # # From Paul Eggert (2014-10-13): # Base the Bougainville entry on the Arawa-Kieta region, which appears to have @@ -697,16 +697,16 @@ Zone Pacific/Port_Moresby 9:48:40 - LMT 1880 # Zone Pacific/Bougainville 10:22:16 - LMT 1880 9:48:32 - PMMT 1895 - 10:00 - +10 1942 Jul - 9:00 - +09 1945 Aug 21 - 10:00 - +10 2014 Dec 28 2:00 - 11:00 - +11 + 10:00 - %z 1942 Jul + 9:00 - %z 1945 Aug 21 + 10:00 - %z 2014 Dec 28 2:00 + 11:00 - %z # Pitcairn # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Pacific/Pitcairn -8:40:20 - LMT 1901 # Adamstown - -8:30 - -0830 1998 Apr 27 0:00 - -8:00 - -08 + -8:30 - %z 1998 Apr 27 0:00 + -8:00 - %z # American Samoa # Midway @@ -795,15 +795,15 @@ Rule WS 2012 2020 - Sep lastSun 3:00 1 - # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Pacific/Apia 12:33:04 - LMT 1892 Jul 5 -11:26:56 - LMT 1911 - -11:30 - -1130 1950 - -11:00 WS -11/-10 2011 Dec 29 24:00 - 13:00 WS +13/+14 + -11:30 - %z 1950 + -11:00 WS %z 2011 Dec 29 24:00 + 13:00 WS %z # Solomon Is # excludes Bougainville, for which see Papua New Guinea # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Pacific/Guadalcanal 10:39:48 - LMT 1912 Oct 1 # Honiara - 11:00 - +11 + 11:00 - %z # Tokelau # @@ -826,8 +826,8 @@ Zone Pacific/Guadalcanal 10:39:48 - LMT 1912 Oct 1 # Honiara # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Pacific/Fakaofo -11:24:56 - LMT 1901 - -11:00 - -11 2011 Dec 30 - 13:00 - +13 + -11:00 - %z 2011 Dec 30 + 13:00 - %z # Tonga # Rule NAME FROM TO - IN ON AT SAVE LETTER/S @@ -839,9 +839,9 @@ Rule Tonga 2016 only - Nov Sun>=1 2:00 1:00 - Rule Tonga 2017 only - Jan Sun>=15 3:00 0 - # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Pacific/Tongatapu 12:19:12 - LMT 1945 Sep 10 - 12:20 - +1220 1961 - 13:00 - +13 1999 - 13:00 Tonga +13/+14 + 12:20 - %z 1961 + 13:00 - %z 1999 + 13:00 Tonga %z # US minor outlying islands @@ -930,7 +930,7 @@ Rule Vanuatu 1992 1993 - Jan Sat>=22 24:00 0 - Rule Vanuatu 1992 only - Oct Sat>=22 24:00 1:00 - # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Pacific/Efate 11:13:16 - LMT 1912 Jan 13 # Vila - 11:00 Vanuatu +11/+12 + 11:00 Vanuatu %z ############################################################################### @@ -1,9 +1,10 @@ -# tzdb links for backward compatibility +# Links and zones for backward compatibility # This file is in the public domain, so clarified as of # 2009-05-17 by Arthur David Olson. # This file provides links from old or merged timezone names to current ones. +# It also provides a few zone entries for old naming conventions. # Many names changed in 1993 and in 1995, and many merged names moved here # in the period from 2013 through 2022. Several of these names are # also present in the file 'backzone', which has data important only @@ -44,6 +45,8 @@ Link America/Rio_Branco Brazil/Acre #= America/Porto_Acre Link America/Noronha Brazil/DeNoronha Link America/Sao_Paulo Brazil/East Link America/Manaus Brazil/West +Link Europe/Brussels CET +Link America/Chicago CST6CDT Link America/Halifax Canada/Atlantic Link America/Winnipeg Canada/Central # This line is commented out, as the name exceeded the 14-character limit @@ -58,6 +61,9 @@ Link America/Whitehorse Canada/Yukon Link America/Santiago Chile/Continental Link Pacific/Easter Chile/EasterIsland Link America/Havana Cuba +Link Europe/Athens EET +Link America/Panama EST +Link America/New_York EST5EDT Link Africa/Cairo Egypt Link Europe/Dublin Eire # Vanguard section, for most .zi parsers. @@ -96,6 +102,9 @@ Link America/Jamaica Jamaica Link Asia/Tokyo Japan Link Pacific/Kwajalein Kwajalein Link Africa/Tripoli Libya +Link Europe/Brussels MET +Link America/Phoenix MST +Link America/Denver MST7MDT Link America/Tijuana Mexico/BajaNorte Link America/Mazatlan Mexico/BajaSur Link America/Mexico_City Mexico/General @@ -275,6 +284,7 @@ Link America/Denver America/Shiprock Link America/Toronto America/Thunder_Bay Link America/Edmonton America/Yellowknife Link Pacific/Auckland Antarctica/South_Pole +Link Asia/Ulaanbaatar Asia/Choibalsan Link Asia/Shanghai Asia/Chongqing Link Asia/Shanghai Asia/Harbin Link Asia/Urumqi Asia/Kashgar @@ -289,6 +299,7 @@ Link Europe/Kyiv Europe/Zaporozhye Link Pacific/Kanton Pacific/Enderbury Link Pacific/Honolulu Pacific/Johnston Link Pacific/Port_Moresby Pacific/Yap +Link Europe/Lisbon WET # Alternate names for the same location @@ -314,5 +325,7 @@ Link Europe/Kyiv Europe/Kiev # Classically, Cyprus is in Asia; e.g. see Herodotus, Histories, I.72. # However, for various reasons many users expect to find it under Europe. Link Asia/Nicosia Europe/Nicosia +Link Pacific/Honolulu HST +Link America/Los_Angeles PST8PDT Link Pacific/Guadalcanal Pacific/Ponape #= Pacific/Pohnpei Link Pacific/Port_Moresby Pacific/Truk #= Pacific/Chuuk @@ -346,10 +346,8 @@ Zone Africa/Lome 0:04:52 - LMT 1893 # Angola # -# From Paul Eggert (2018-02-16): -# Shanks gives 1911-05-26 for the transition to WAT, -# evidently confusing the date of the Portuguese decree -# (see Europe/Lisbon) with the date that it took effect. +# From Tim Parenti (2024-07-01), per Paul Eggert (2018-02-16): +# For timestamps before independence, see commentary for Europe/Lisbon. # Zone Africa/Luanda 0:52:56 - LMT 1892 0:52:04 - LMT 1911 Dec 31 23:00u # Luanda MT? @@ -1086,10 +1084,10 @@ Zone Asia/Muscat 3:54:24 - LMT 1920 4:00 - +04 # India -# From Paul Eggert (2014-08-11), after a heads-up from Stephen Colebourne: -# According to a Portuguese decree (1911-05-26) -# https://dre.pt/pdf1sdip/1911/05/12500/23132313.pdf -# Portuguese India switched to UT +05 on 1912-01-01. +# From Tim Parenti (2024-07-01), per Paul Eggert (2014-08-11), after a +# heads-up from Stephen Colebourne: +# According to a Portuguese decree (1911-05-24), Portuguese India switched to +# UT +05 on 1912-01-01 (see Europe/Lisbon). #Zone Asia/Panaji [not enough info to complete] # Cambodia @@ -1829,6 +1827,27 @@ Zone Pacific/Wake 11:06:28 - LMT 1901 Zone Pacific/Wallis 12:15:20 - LMT 1901 12:00 - +12 + +# From Paul Eggert (2024-05-22): +# The following zones pretend that standard time extends backward +# indefinitely into the past, and so are ahistorical. +# In current TZDB these entries are links to geographical locations +# that agree with the ahistorical zones since 1970. +# These are in numeric rather than alphabetic order. + +# Zone NAME STDOFF RULES FORMAT [UNTIL] +Zone HST -10:00 - HST +Zone PST8PDT -8:00 US P%sT +Zone MST -7:00 - MST +Zone MST7MDT -7:00 US M%sT +Zone CST6CDT -6:00 US C%sT +Zone EST -5:00 - EST +Zone EST5EDT -5:00 US E%sT +Zone WET 0:00 EU WE%sT +Zone CET 1:00 C-Eur CE%sT +Zone MET 1:00 C-Eur ME%sT +Zone EET 2:00 EU EE%sT + # Local Variables: # coding: utf-8 # End: diff --git a/checknow.awk b/checknow.awk index 57ff3c02e789..8b7881d2e27f 100644 --- a/checknow.awk +++ b/checknow.awk @@ -14,7 +14,7 @@ BEGIN { if ($0 ~ /^TZ/) { record_zone(zone, data) zone = $0 - sub(/.*\.dir\//, "", zone) + sub(/.*\.ckd\//, "", zone) sub(/\/\//, "/", zone) sub(/"/, "", zone) data = "" @@ -45,7 +45,7 @@ END { for (zone in zone_data) { data = zone_data[zone] if (!zonenow[data]) { - printf "zonenow.tab should have one of:%s\n", zones[data] + printf "Zone table should have one of:%s\n", zones[data] zonenow[data] = zone # This suppresses duplicate diagnostics. status = 1 } @@ -5,7 +5,7 @@ # These entries are for uses not otherwise covered by the tz database. # Their main practical use is for platforms like Android that lack -# support for POSIX.1-2017-style TZ strings. On such platforms these entries +# support for POSIX proleptic TZ strings. On such platforms these entries # can be useful if the timezone database is wrong or if a ship or # aircraft at sea is not in a timezone. @@ -51,29 +51,29 @@ Link Etc/GMT GMT # so we moved the names into the Etc subdirectory. # Also, the time zone abbreviations are now compatible with %z. -Zone Etc/GMT-14 14 - +14 -Zone Etc/GMT-13 13 - +13 -Zone Etc/GMT-12 12 - +12 -Zone Etc/GMT-11 11 - +11 -Zone Etc/GMT-10 10 - +10 -Zone Etc/GMT-9 9 - +09 -Zone Etc/GMT-8 8 - +08 -Zone Etc/GMT-7 7 - +07 -Zone Etc/GMT-6 6 - +06 -Zone Etc/GMT-5 5 - +05 -Zone Etc/GMT-4 4 - +04 -Zone Etc/GMT-3 3 - +03 -Zone Etc/GMT-2 2 - +02 -Zone Etc/GMT-1 1 - +01 -Zone Etc/GMT+1 -1 - -01 -Zone Etc/GMT+2 -2 - -02 -Zone Etc/GMT+3 -3 - -03 -Zone Etc/GMT+4 -4 - -04 -Zone Etc/GMT+5 -5 - -05 -Zone Etc/GMT+6 -6 - -06 -Zone Etc/GMT+7 -7 - -07 -Zone Etc/GMT+8 -8 - -08 -Zone Etc/GMT+9 -9 - -09 -Zone Etc/GMT+10 -10 - -10 -Zone Etc/GMT+11 -11 - -11 -Zone Etc/GMT+12 -12 - -12 +Zone Etc/GMT-14 14 - %z +Zone Etc/GMT-13 13 - %z +Zone Etc/GMT-12 12 - %z +Zone Etc/GMT-11 11 - %z +Zone Etc/GMT-10 10 - %z +Zone Etc/GMT-9 9 - %z +Zone Etc/GMT-8 8 - %z +Zone Etc/GMT-7 7 - %z +Zone Etc/GMT-6 6 - %z +Zone Etc/GMT-5 5 - %z +Zone Etc/GMT-4 4 - %z +Zone Etc/GMT-3 3 - %z +Zone Etc/GMT-2 2 - %z +Zone Etc/GMT-1 1 - %z +Zone Etc/GMT+1 -1 - %z +Zone Etc/GMT+2 -2 - %z +Zone Etc/GMT+3 -3 - %z +Zone Etc/GMT+4 -4 - %z +Zone Etc/GMT+5 -5 - %z +Zone Etc/GMT+6 -6 - %z +Zone Etc/GMT+7 -7 - %z +Zone Etc/GMT+8 -8 - %z +Zone Etc/GMT+9 -9 - %z +Zone Etc/GMT+10 -10 - %z +Zone Etc/GMT+11 -11 - %z +Zone Etc/GMT+12 -12 - %z @@ -730,14 +730,6 @@ Rule Russia 1996 2010 - Oct lastSun 2:00s 0 - # Take "abolishing daylight saving time" to mean that time is now considered # to be standard. -# These are for backward compatibility with older versions. - -# Zone NAME STDOFF RULES FORMAT [UNTIL] -Zone WET 0:00 EU WE%sT -Zone CET 1:00 C-Eur CE%sT -Zone MET 1:00 C-Eur ME%sT -Zone EET 2:00 EU EE%sT - # Previous editions of this database used abbreviations like MET DST # for Central European Summer Time, but this didn't agree with common usage. @@ -871,7 +863,7 @@ Zone Europe/Minsk 1:50:16 - LMT 1880 3:00 Russia MSK/MSD 1990 3:00 - MSK 1991 Mar 31 2:00s 2:00 Russia EE%sT 2011 Mar 27 2:00s - 3:00 - +03 + 3:00 - %z # Belgium # Luxembourg @@ -1176,22 +1168,22 @@ Rule Thule 2007 max - Nov Sun>=1 2:00 0 S # # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Danmarkshavn -1:14:40 - LMT 1916 Jul 28 - -3:00 - -03 1980 Apr 6 2:00 - -3:00 EU -03/-02 1996 + -3:00 - %z 1980 Apr 6 2:00 + -3:00 EU %z 1996 0:00 - GMT # # Use the old name Scoresbysund, as the current name Ittoqqortoormiit # exceeds tzdb's 14-letter limit and has no common English abbreviation. Zone America/Scoresbysund -1:27:52 - LMT 1916 Jul 28 # Ittoqqortoormiit - -2:00 - -02 1980 Apr 6 2:00 - -2:00 C-Eur -02/-01 1981 Mar 29 - -1:00 EU -01/+00 2024 Mar 31 - -2:00 EU -02/-01 + -2:00 - %z 1980 Apr 6 2:00 + -2:00 C-Eur %z 1981 Mar 29 + -1:00 EU %z 2024 Mar 31 + -2:00 EU %z Zone America/Nuuk -3:26:56 - LMT 1916 Jul 28 # Godthåb - -3:00 - -03 1980 Apr 6 2:00 - -3:00 EU -03/-02 2023 Mar 26 1:00u - -2:00 - -02 2023 Oct 29 1:00u - -2:00 EU -02/-01 + -3:00 - %z 1980 Apr 6 2:00 + -3:00 EU %z 2023 Mar 26 1:00u + -2:00 - %z 2023 Oct 29 1:00u + -2:00 EU %z Zone America/Thule -4:35:08 - LMT 1916 Jul 28 # Pituffik -4:00 Thule A%sT @@ -2063,10 +2055,39 @@ Zone Europe/Warsaw 1:24:00 - LMT 1880 # Portugal -# From Paul Eggert (2014-08-11), after a heads-up from Stephen Colebourne: -# According to a Portuguese decree (1911-05-26) -# https://dre.pt/application/dir/pdf1sdip/1911/05/12500/23132313.pdf -# Lisbon was at -0:36:44.68, but switched to GMT on 1912-01-01 at 00:00. +# From Tim Parenti (2024-07-01), per Alois Treindl (2021-02-07) and Michael +# Deckers (2021-02-10): +# http://oal.ul.pt/documentos/2018/01/hl1911a2018.pdf/ +# The Astronomical Observatory of Lisbon has published a list detailing the +# historical transitions in legal time within continental Portugal. It +# directly references many decrees and ordinances which are, in turn, +# referenced below. They can be viewed in the public archives of the Diário da +# República (until 1976-04-09 known as the Diário do Govêrno) at +# https://dre.pt/ (in Portuguese). +# +# Most of the Rules below have been updated simply to match the Observatory's +# listing for continental (mainland) Portugal. Although there are over 50 +# referenced decrees and ordinances, only the handful with comments below have +# been verified against the text, typically to provide additional confidence +# wherever dates provided by Whitman and Shanks & Pottenger had disagreed. +# See further below for the Azores and Madeira. + +# From Tim Parenti (2024-07-01), per Paul Eggert (2014-08-11), after a +# heads-up from Stephen Colebourne: +# According to a 1911-05-24 Portuguese decree, Lisbon was at -0:36:44.68, but +# switched to GMT on 1912-01-01 at 00:00. +# https://dre.pt/dr/detalhe/decreto/593090 +# https://dre.pt/application/conteudo/593090 +# The decree made legal time throughout Portugal and her possessions +# "subordinate to the Greenwich meridian, according to the principle adopted at +# the Washington Convention in 1884" and eliminated the "difference of five +# minutes between the internal and external clocks of railway stations". +# +# The decree was gazetted in the 1911-05-30 issue of Diário do Govêrno, and is +# considered to be dated 1911-05-24 by that issue's summary; however, the text +# of the decree itself is dated 1911-05-26. The Diário da República website +# notes the discrepancy, but later laws and the Observatory all seem to refer +# to this decree by the 1911-05-24 date. # # From Michael Deckers (2018-02-15): # article 5 [of the 1911 decree; Deckers's translation] ...: @@ -2074,37 +2095,62 @@ Zone Europe/Warsaw 1:24:00 - LMT 1880 # according to the 2nd article, the civil day January 1, 1912 begins, # all clocks therefore having to be advanced or set back correspondingly ... -# From Rui Pedro Salgueiro (1992-11-12): -# Portugal has recently (September, 27) changed timezone -# (from WET to MET or CET) to harmonize with EEC. -# -# Martin Bruckmann (1996-02-29) reports via Peter Ilieve -# that Portugal is reverting to 0:00 by not moving its clocks this spring. -# The new Prime Minister was fed up with getting up in the dark in the winter. -# -# From Paul Eggert (1996-11-12): -# IATA SSIM (1991-09) reports several 1991-09 and 1992-09 transitions -# at 02:00u, not 01:00u. Assume that these are typos. -# IATA SSIM (1991/1992) reports that the Azores were at -1:00. -# IATA SSIM (1993-02) says +0:00; later issues (through 1996-09) say -1:00. -# Guess that the Azores changed to EU rules in 1992 (since that's when Portugal -# harmonized with EU rules), and that they stayed +0:00 that winter. -# # Rule NAME FROM TO - IN ON AT SAVE LETTER/S -# DSH writes that despite Decree 1,469 (1915), the change to the clocks was not -# done every year, depending on what Spain did, because of railroad schedules. -# Go with Shanks & Pottenger. +# From Tim Parenti (2024-07-01), per Paul Eggert (1999-01-30): +# DSH writes in their history that Decreto 1469 of 1915-03-30 established +# summer time and that, "despite" this, the change to the clocks was not done +# every year, depending on what Spain did, because of railroad schedules. +# In fact, that decree had nothing to do with DST; rather, it regulated the +# sending of time signals. But we do see linkage to Spain in the 1920s below. +# https://dre.pt/dr/detalhe/decreto/1469-1915-285721 +# https://dre.pt/application/conteudo/285721 +# +# According to the Observatory, standard time was first advanced by Decreto +# 2433 of 1916-06-09 and restored by Decreto 2712 of 1916-10-28. While Whitman +# gives 1916-10-31 for the latter transition, Shanks & Pottenger agrees more +# closely with the decree, which stated that its provision "will start sixty +# minutes after the end of 31 October, according to the current time," i.e., +# 01:00 on 1 November. +# https://dre.pt/dr/detalhe/decreto/2433-1916-267192 +# https://dre.pt/application/conteudo/267192 +# https://dre.pt/dr/detalhe/decreto/2712-1916-590937 +# https://dre.pt/application/conteudo/590937 Rule Port 1916 only - Jun 17 23:00 1:00 S -# Whitman gives 1916 Oct 31; go with Shanks & Pottenger. Rule Port 1916 only - Nov 1 1:00 0 - -Rule Port 1917 only - Feb 28 23:00s 1:00 S -Rule Port 1917 1921 - Oct 14 23:00s 0 - -Rule Port 1918 only - Mar 1 23:00s 1:00 S -Rule Port 1919 only - Feb 28 23:00s 1:00 S -Rule Port 1920 only - Feb 29 23:00s 1:00 S -Rule Port 1921 only - Feb 28 23:00s 1:00 S +# From Tim Parenti (2024-07-01): +# Article 7 of Decreto 2922 of 1916-12-30 stated that "the legal time will be +# advanced by sixty minutes from 1 March to 31 October." Per Article 15, this +# came into force from 1917-01-01. Just before the first fall back, Decreto +# 3446 of 1917-10-11 changed the annual end date to 14 October. +# https://dre.pt/dr/detalhe/decreto/2922-1916-261894 +# https://dre.pt/application/conteudo/261894 +# https://dre.pt/dr/detalhe/decreto/3446-1917-495161 +# https://dre.pt/application/conteudo/495161 +# This annual change was revoked by Decreto 8038 of 1922-02-18. +# https://dre.pt/dr/detalhe/decreto/8038-1922-569751 +# https://dre.pt/application/conteudo/569751 +Rule Port 1917 1921 - Mar 1 0:00 1:00 S +Rule Port 1917 1921 - Oct 14 24:00 0 - +# From Tim Parenti (2024-07-01): +# Decreto 9592 of 1924-04-14 noted that "France maintains the advance of legal +# time in the summer and Spain has now adopted it for the first time" and +# considered "that the absence of similar measures would cause serious +# difficulties for international rail connections with consequent repercussions +# on domestic service hours..." along with "inconvenient analogues...for postal +# and telegraph services." Summer time would be in effect from 17 April to 4 +# October, with the spring change explicitly specified by bringing clocks +# forward from 16 April 23:00. +# https://dre.pt/dr/detalhe/decreto/9592-1924-652133 +# https://dre.pt/application/conteudo/652133 +# +# Decreto 10700, issued 1925-04-16, noted that Spain had not continued summer +# time, declared that "the current legal hour prior to 17 April remains +# unchanged from that day forward", and revoked legislation to the contrary, +# just a day before summer time would have otherwise resumed. +# https://dre.pt/dr/detalhe/decreto/10700-1925-437826 +# https://dre.pt/application/conteudo/437826 Rule Port 1924 only - Apr 16 23:00s 1:00 S -Rule Port 1924 only - Oct 14 23:00s 0 - +Rule Port 1924 only - Oct 4 23:00s 0 - Rule Port 1926 only - Apr 17 23:00s 1:00 S Rule Port 1926 1929 - Oct Sat>=1 23:00s 0 - Rule Port 1927 only - Apr 9 23:00s 1:00 S @@ -2116,6 +2162,8 @@ Rule Port 1931 1932 - Oct Sat>=1 23:00s 0 - Rule Port 1932 only - Apr 2 23:00s 1:00 S Rule Port 1934 only - Apr 7 23:00s 1:00 S # Whitman gives 1934 Oct 5; go with Shanks & Pottenger. +# Note: The 1935 law specified 10-06 00:00, not 10-05 24:00, but the following +# is equivalent and more succinct. Rule Port 1934 1938 - Oct Sat>=1 23:00s 0 - # Shanks & Pottenger give 1935 Apr 30; go with Whitman. Rule Port 1935 only - Mar 30 23:00s 1:00 S @@ -2126,10 +2174,19 @@ Rule Port 1938 only - Mar 26 23:00s 1:00 S Rule Port 1939 only - Apr 15 23:00s 1:00 S # Whitman gives 1939 Oct 7; go with Shanks & Pottenger. Rule Port 1939 only - Nov 18 23:00s 0 - +# From Tim Parenti (2024-07-01): +# Portaria 9465 of 1940-02-17 advanced clocks from Saturday 1940-02-24 23:00. +# The clocks were restored by Portaria 9658, issued Monday 1940-10-07, +# effective from 24:00 that very night, which agrees with Shanks & Pottenger; +# Whitman gives Saturday 1940-10-05 instead. +# https://dre.pt/dr/detalhe/portaria/9465-1940-189096 +# https://dre.pt/application/conteudo/189096 +# https://dre.pt/dr/detalhe/portaria/9658-1940-196729 +# https://dre.pt/application/conteudo/196729 Rule Port 1940 only - Feb 24 23:00s 1:00 S -# Shanks & Pottenger give 1940 Oct 7; go with Whitman. -Rule Port 1940 1941 - Oct 5 23:00s 0 - +Rule Port 1940 only - Oct 7 23:00s 0 - Rule Port 1941 only - Apr 5 23:00s 1:00 S +Rule Port 1941 only - Oct 5 23:00s 0 - Rule Port 1942 1945 - Mar Sat>=8 23:00s 1:00 S Rule Port 1942 only - Apr 25 22:00s 2:00 M # Midsummer Rule Port 1942 only - Aug 15 22:00s 1:00 S @@ -2139,66 +2196,195 @@ Rule Port 1943 1945 - Aug Sat>=25 22:00s 1:00 S Rule Port 1944 1945 - Apr Sat>=21 22:00s 2:00 M Rule Port 1946 only - Apr Sat>=1 23:00s 1:00 S Rule Port 1946 only - Oct Sat>=1 23:00s 0 - -# Whitman says DST was not observed in 1950; go with Shanks & Pottenger. -# Whitman gives Oct lastSun for 1952 on; go with Shanks & Pottenger. -Rule Port 1947 1965 - Apr Sun>=1 2:00s 1:00 S +# From Tim Parenti (2024-07-01), per Alois Treindl (2021-02-07): +# The Astronomical Observatory of Lisbon cites Portaria 11767 of 1947-03-28 for +# 1947 and Portaria 12286 of 1948-02-19 for 1948. +# https://dre.pt/dr/detalhe/portaria/11767-1947-414787 +# https://dre.pt/application/conteudo/414787 +# https://dre.pt/dr/detalhe/portaria/12286-1948-152953 +# https://dre.pt/application/conteudo/152953 +# +# Although the latter ordinance explicitly had the 1948-10-03 transition +# scheduled for 02:00 rather than 03:00 as had been used in 1947, Decreto-Lei +# 37048 of 1948-09-07 recognized "that it is advisable to definitely set...the +# 'summer time' regime", and fixed the fall transition at 03:00 moving forward. +# https://dre.pt/dr/detalhe/decreto-lei/37048-1948-373810 +# https://dre.pt/application/conteudo/373810 +# While the Observatory only cites this act for 1949-1965 and not for 1948, it +# does not appear to have had any provision delaying its effect, so assume that +# it overrode the prior ordinance for 1948-10-03. +# +# Whitman says DST was not observed in 1950 and gives Oct lastSun for 1952 on. +# The Observatory, however, agrees with Shanks & Pottenger that 1950 was not an +# exception and that Oct Sun>=1 was maintained through 1965. +Rule Port 1947 1966 - Apr Sun>=1 2:00s 1:00 S Rule Port 1947 1965 - Oct Sun>=1 2:00s 0 - -Rule Port 1977 only - Mar 27 0:00s 1:00 S -Rule Port 1977 only - Sep 25 0:00s 0 - -Rule Port 1978 1979 - Apr Sun>=1 0:00s 1:00 S -Rule Port 1978 only - Oct 1 0:00s 0 - -Rule Port 1979 1982 - Sep lastSun 1:00s 0 - -Rule Port 1980 only - Mar lastSun 0:00s 1:00 S -Rule Port 1981 1982 - Mar lastSun 1:00s 1:00 S -Rule Port 1983 only - Mar lastSun 2:00s 1:00 S +# From Tim Parenti (2024-07-01): +# Decreto-Lei 47233 of 1966-10-01 considered that the "duality" in time was +# "the cause of serious disturbances" and noted that "the countries with which +# we have the most frequent contacts...have already adopted" a solution +# coinciding with the extant "summer time". It established that the former +# "summer time" would apply year-round on the mainland and adjacent islands +# with immediate effect, as the fall back would have otherwise occurred later +# that evening. +# https://dre.pt/dr/detalhe/decreto-lei/47233-1966-293729 +# Model this by changing zones without changing clocks at the +# previously-appointed fall back time. +# +# Decreto-Lei 309/76 of 1976-04-27 acknowledged that those international +# contacts had returned to adopting seasonal times, and considered that the +# year-round advancement "entails considerable sacrifices for the vast majority +# of the working population during the winter months", including morning +# visibility concerns for schoolchildren. It specified, beginning 1976-09-26 +# 01:00, an annual return to UT+00 on the mainland from 00:00 UT on Sep lastSun +# to 00:00 UT on Mar lastSun (unless the latter date fell on Easter, in which +# case it was to be brought forward to the preceding Sunday). It also assigned +# the Permanent Time Commission to study and propose revisions for the Azores +# and Madeira, neither of which resumed DST until 1982 (as described further +# below). +# https://dre.pt/dr/detalhe/decreto-lei/309-1976-502063 +Rule Port 1976 only - Sep lastSun 1:00 0 - +Rule Port 1977 only - Mar lastSun 0:00s 1:00 S +Rule Port 1977 only - Sep lastSun 0:00s 0 - +# From Tim Parenti (2024-07-01): +# Beginning in 1978, rather than triggering the Easter rule of the 1976 decree +# (Easter fell on 1978-03-26), Article 5 was used instead, which allowed DST +# dates to be changed by order of the Minister of Education and Scientific +# Research, upon consultation with the Permanent Time Commission, "whenever +# considered convenient." As such, a series of one-off ordinances were +# promulgated for the mainland in 1978 through 1980, after which the 1976 +# decree naturally came back into force from 1981. +Rule Port 1978 1980 - Apr Sun>=1 1:00s 1:00 S +Rule Port 1978 only - Oct 1 1:00s 0 - +Rule Port 1979 1980 - Sep lastSun 1:00s 0 - +Rule Port 1981 1986 - Mar lastSun 0:00s 1:00 S +Rule Port 1981 1985 - Sep lastSun 0:00s 0 - +# From Tim Parenti (2024-07-01): +# Decreto-Lei 44-B/86 of 1986-03-07 switched mainland Portugal's transition +# times from 0:00s to 1:00u to harmonize with the EEC from 1986-03-30. +# https://dre.pt/dr/detalhe/decreto-lei/44-b-1986-628280 +# (Transitions of 1:00s as previously reported and used by the W-Eur rules, +# though equivalent, appear to have been fiction here.) Madeira continued to +# use 0:00s for spring 1986 before joining with the mainland using 1:00u in the +# fall; meanwhile, in the Azores the two were equivalent, so the law specifying +# 0:00s wasn't touched until 1992. (See below for more on the islands.) +# +# From Rui Pedro Salgueiro (1992-11-12): +# Portugal has recently (September, 27) changed timezone +# (from WET to MET or CET) to harmonize with EEC. +# +# Martin Bruckmann (1996-02-29) reports via Peter Ilieve +# that Portugal is reverting to 0:00 by not moving its clocks this spring. +# The new Prime Minister was fed up with getting up in the dark in the winter. +# +# From Paul Eggert (1996-11-12): +# IATA SSIM (1991-09) reports several 1991-09 and 1992-09 transitions +# at 02:00u, not 01:00u. Assume that these are typos. # # Zone NAME STDOFF RULES FORMAT [UNTIL] #STDOFF -0:36:44.68 Zone Europe/Lisbon -0:36:45 - LMT 1884 -0:36:45 - LMT 1912 Jan 1 0:00u # Lisbon MT - 0:00 Port WE%sT 1966 Apr 3 2:00 + 0:00 Port WE%sT 1966 Oct 2 2:00s 1:00 - CET 1976 Sep 26 1:00 - 0:00 Port WE%sT 1983 Sep 25 1:00s - 0:00 W-Eur WE%sT 1992 Sep 27 1:00s + 0:00 Port WE%sT 1986 + 0:00 EU WE%sT 1992 Sep 27 1:00u 1:00 EU CE%sT 1996 Mar 31 1:00u 0:00 EU WE%sT + +# From Tim Parenti (2024-07-01): +# For the Azores and Madeira, legislation was followed from the laws currently +# in force as listed at: +# https://oal.ul.pt/hora-legal/legislacao/ +# working backward through references of revocation and abrogation to +# Decreto-Lei 47233 of 1966-10-01, the last time DST was abolished across the +# mainland and its adjacent islands. Because of that reference, it is +# therefore assumed that DST rules in the islands prior to 1966 were like that +# of the mainland, though most legislation of the time didn't explicitly +# specify DST practices for the islands. Zone Atlantic/Azores -1:42:40 - LMT 1884 # Ponta Delgada -1:54:32 - HMT 1912 Jan 1 2:00u # Horta MT # Vanguard section, for zic and other parsers that support %z. -# -2:00 Port %z 1966 Apr 3 2:00 -# -1:00 Port %z 1983 Sep 25 1:00s -# -1:00 W-Eur %z 1992 Sep 27 1:00s + -2:00 Port %z 1966 Oct 2 2:00s +# From Tim Parenti (2024-07-01): +# While Decreto-Lei 309/76 of 1976-04-27 reintroduced DST on the mainland by +# falling back on 1976-09-26, it assigned the Permanent Time Commission to +# study and propose revisions for the Azores and Madeira. Decreto Regional +# 9/77/A of 1977-05-17 affirmed that "the legal time remained unchanged in the +# Azores" at UT-1, and would remain there year-round. +# https://dre.pt/dr/detalhe/decreto-regional/9-1977-252066 +# +# Decreto Regional 2/82/A, published 1982-03-02, adopted DST in the same +# fashion as the mainland used at the time. +# https://dre.pt/dr/detalhe/decreto-regional/2-1982-599965 +# Though transitions in the Azores officially remained at 0:00s through 1992, +# this was equivalent to the EU-style 1:00u adopted by the mainland in 1986, so +# model it as such. + -1:00 - %z 1982 Mar 28 0:00s + -1:00 Port %z 1986 # Rearguard section, for parsers lacking %z; see ziguard.awk. - -2:00 Port -02/-01 1942 Apr 25 22:00s - -2:00 Port +00 1942 Aug 15 22:00s - -2:00 Port -02/-01 1943 Apr 17 22:00s - -2:00 Port +00 1943 Aug 28 22:00s - -2:00 Port -02/-01 1944 Apr 22 22:00s - -2:00 Port +00 1944 Aug 26 22:00s - -2:00 Port -02/-01 1945 Apr 21 22:00s - -2:00 Port +00 1945 Aug 25 22:00s - -2:00 Port -02/-01 1966 Apr 3 2:00 - -1:00 Port -01/+00 1983 Sep 25 1:00s - -1:00 W-Eur -01/+00 1992 Sep 27 1:00s +# -2:00 Port -02/-01 1942 Apr 25 22:00s +# -2:00 Port +00 1942 Aug 15 22:00s +# -2:00 Port -02/-01 1943 Apr 17 22:00s +# -2:00 Port +00 1943 Aug 28 22:00s +# -2:00 Port -02/-01 1944 Apr 22 22:00s +# -2:00 Port +00 1944 Aug 26 22:00s +# -2:00 Port -02/-01 1945 Apr 21 22:00s +# -2:00 Port +00 1945 Aug 25 22:00s +# -2:00 Port -02/-01 1966 Oct 2 2:00s +# -1:00 - -01 1982 Mar 28 0:00s +# -1:00 Port -01/+00 1986 # End of rearguard section. - 0:00 EU WE%sT 1993 Mar 28 1:00u - -1:00 EU -01/+00 +# +# From Paul Eggert (1996-11-12): +# IATA SSIM (1991/1992) reports that the Azores were at -1:00. +# IATA SSIM (1993-02) says +0:00; later issues (through 1996-09) say -1:00. +# +# From Tim Parenti (2024-07-01): +# After mainland Portugal had shifted forward an hour from 1992-09-27, Decreto +# Legislativo Regional 29/92/A of 1992-12-23 sought to "reduce the time +# difference" by shifting the Azores forward as well from 1992-12-27. Just six +# months later, this was revoked by Decreto Legislativo Regional 9/93/A, citing +# "major changes in work habits and way of life." Though the revocation didn't +# give a transition time, it was signed Wednesday 1993-06-16; assume it took +# effect later that evening, and that an EU-style spring forward (to +01) was +# still observed in the interim on 1993-03-28. +# https://dre.pt/dr/detalhe/decreto-legislativo-regional/29-1992-621553 +# https://dre.pt/dr/detalhe/decreto-legislativo-regional/9-1993-389633 + -1:00 EU %z 1992 Dec 27 1:00s + 0:00 EU WE%sT 1993 Jun 17 1:00u + -1:00 EU %z + Zone Atlantic/Madeira -1:07:36 - LMT 1884 # Funchal -1:07:36 - FMT 1912 Jan 1 1:00u # Funchal MT # Vanguard section, for zic and other parsers that support %z. -# -1:00 Port %z 1966 Apr 3 2:00 + -1:00 Port %z 1966 Oct 2 2:00s # Rearguard section, for parsers lacking %z; see ziguard.awk. - -1:00 Port -01/+00 1942 Apr 25 22:00s - -1:00 Port +01 1942 Aug 15 22:00s - -1:00 Port -01/+00 1943 Apr 17 22:00s - -1:00 Port +01 1943 Aug 28 22:00s - -1:00 Port -01/+00 1944 Apr 22 22:00s - -1:00 Port +01 1944 Aug 26 22:00s - -1:00 Port -01/+00 1945 Apr 21 22:00s - -1:00 Port +01 1945 Aug 25 22:00s - -1:00 Port -01/+00 1966 Apr 3 2:00 +# -1:00 Port -01/+00 1942 Apr 25 22:00s +# -1:00 Port +01 1942 Aug 15 22:00s +# -1:00 Port -01/+00 1943 Apr 17 22:00s +# -1:00 Port +01 1943 Aug 28 22:00s +# -1:00 Port -01/+00 1944 Apr 22 22:00s +# -1:00 Port +01 1944 Aug 26 22:00s +# -1:00 Port -01/+00 1945 Apr 21 22:00s +# -1:00 Port +01 1945 Aug 25 22:00s +# -1:00 Port -01/+00 1966 Oct 2 2:00s # End of rearguard section. - 0:00 Port WE%sT 1983 Sep 25 1:00s +# +# From Tim Parenti (2024-07-01): +# Decreto Regional 5/82/M, published 1982-04-03, established DST transitions at +# 0:00u, which for Madeira is equivalent to the mainland's rules (0:00s) at the +# time. It came into effect the day following its publication, Sunday +# 1982-04-04, thus resuming Madeira's DST practice about a week later than the +# mainland and the Azores. +# https://dre.pt/dr/detalhe/decreto-regional/5-1982-608273 +# +# Decreto Legislativo Regional 18/86/M, published 1986-10-01, adopted EU-style +# rules (1:00u) and entered into immediate force after being signed on +# 1986-07-31. +# https://dre.pt/dr/detalhe/decreto-legislativo-regional/18-1986-221705 + 0:00 - WET 1982 Apr 4 + 0:00 Port WE%sT 1986 Jul 31 0:00 EU WE%sT # Romania @@ -2410,7 +2596,7 @@ Zone Europe/Kaliningrad 1:22:00 - LMT 1893 Apr 2:00 Poland EE%sT 1946 Apr 7 3:00 Russia MSK/MSD 1989 Mar 26 2:00s 2:00 Russia EE%sT 2011 Mar 27 2:00s - 3:00 - +03 2014 Oct 26 2:00s + 3:00 - %z 2014 Oct 26 2:00s 2:00 - EET @@ -2660,14 +2846,14 @@ Zone Europe/Simferopol 2:16:24 - LMT 1880 # http://publication.pravo.gov.ru/Document/View/0001201602150056 Zone Europe/Astrakhan 3:12:12 - LMT 1924 May - 3:00 - +03 1930 Jun 21 - 4:00 Russia +04/+05 1989 Mar 26 2:00s - 3:00 Russia +03/+04 1991 Mar 31 2:00s - 4:00 - +04 1992 Mar 29 2:00s - 3:00 Russia +03/+04 2011 Mar 27 2:00s - 4:00 - +04 2014 Oct 26 2:00s - 3:00 - +03 2016 Mar 27 2:00s - 4:00 - +04 + 3:00 - %z 1930 Jun 21 + 4:00 Russia %z 1989 Mar 26 2:00s + 3:00 Russia %z 1991 Mar 31 2:00s + 4:00 - %z 1992 Mar 29 2:00s + 3:00 Russia %z 2011 Mar 27 2:00s + 4:00 - %z 2014 Oct 26 2:00s + 3:00 - %z 2016 Mar 27 2:00s + 4:00 - %z # From Paul Eggert (2016-11-11): # Europe/Volgograd covers: @@ -2697,15 +2883,15 @@ Zone Europe/Astrakhan 3:12:12 - LMT 1924 May # http://publication.pravo.gov.ru/Document/View/0001202012220002 Zone Europe/Volgograd 2:57:40 - LMT 1920 Jan 3 - 3:00 - +03 1930 Jun 21 - 4:00 - +04 1961 Nov 11 - 4:00 Russia +04/+05 1988 Mar 27 2:00s + 3:00 - %z 1930 Jun 21 + 4:00 - %z 1961 Nov 11 + 4:00 Russia %z 1988 Mar 27 2:00s 3:00 Russia MSK/MSD 1991 Mar 31 2:00s - 4:00 - +04 1992 Mar 29 2:00s + 4:00 - %z 1992 Mar 29 2:00s 3:00 Russia MSK/MSD 2011 Mar 27 2:00s 4:00 - MSK 2014 Oct 26 2:00s 3:00 - MSK 2018 Oct 28 2:00s - 4:00 - +04 2020 Dec 27 2:00s + 4:00 - %z 2020 Dec 27 2:00s 3:00 - MSK # From Paul Eggert (2016-11-11): @@ -2720,14 +2906,14 @@ Zone Europe/Volgograd 2:57:40 - LMT 1920 Jan 3 # http://publication.pravo.gov.ru/Document/View/0001201611220031 Zone Europe/Saratov 3:04:18 - LMT 1919 Jul 1 0:00u - 3:00 - +03 1930 Jun 21 - 4:00 Russia +04/+05 1988 Mar 27 2:00s - 3:00 Russia +03/+04 1991 Mar 31 2:00s - 4:00 - +04 1992 Mar 29 2:00s - 3:00 Russia +03/+04 2011 Mar 27 2:00s - 4:00 - +04 2014 Oct 26 2:00s - 3:00 - +03 2016 Dec 4 2:00s - 4:00 - +04 + 3:00 - %z 1930 Jun 21 + 4:00 Russia %z 1988 Mar 27 2:00s + 3:00 Russia %z 1991 Mar 31 2:00s + 4:00 - %z 1992 Mar 29 2:00s + 3:00 Russia %z 2011 Mar 27 2:00s + 4:00 - %z 2014 Oct 26 2:00s + 3:00 - %z 2016 Dec 4 2:00s + 4:00 - %z # From Paul Eggert (2016-03-18): # Europe/Kirov covers: @@ -2735,10 +2921,10 @@ Zone Europe/Saratov 3:04:18 - LMT 1919 Jul 1 0:00u # The 1989 transition is from USSR act No. 227 (1989-03-14). # Zone Europe/Kirov 3:18:48 - LMT 1919 Jul 1 0:00u - 3:00 - +03 1930 Jun 21 - 4:00 Russia +04/+05 1989 Mar 26 2:00s + 3:00 - %z 1930 Jun 21 + 4:00 Russia %z 1989 Mar 26 2:00s 3:00 Russia MSK/MSD 1991 Mar 31 2:00s - 4:00 - +04 1992 Mar 29 2:00s + 4:00 - %z 1992 Mar 29 2:00s 3:00 Russia MSK/MSD 2011 Mar 27 2:00s 4:00 - MSK 2014 Oct 26 2:00s 3:00 - MSK @@ -2753,15 +2939,15 @@ Zone Europe/Kirov 3:18:48 - LMT 1919 Jul 1 0:00u # The 1989 transition is from USSR act No. 227 (1989-03-14). Zone Europe/Samara 3:20:20 - LMT 1919 Jul 1 0:00u - 3:00 - +03 1930 Jun 21 - 4:00 - +04 1935 Jan 27 - 4:00 Russia +04/+05 1989 Mar 26 2:00s - 3:00 Russia +03/+04 1991 Mar 31 2:00s - 2:00 Russia +02/+03 1991 Sep 29 2:00s - 3:00 - +03 1991 Oct 20 3:00 - 4:00 Russia +04/+05 2010 Mar 28 2:00s - 3:00 Russia +03/+04 2011 Mar 27 2:00s - 4:00 - +04 + 3:00 - %z 1930 Jun 21 + 4:00 - %z 1935 Jan 27 + 4:00 Russia %z 1989 Mar 26 2:00s + 3:00 Russia %z 1991 Mar 31 2:00s + 2:00 Russia %z 1991 Sep 29 2:00s + 3:00 - %z 1991 Oct 20 3:00 + 4:00 Russia %z 2010 Mar 28 2:00s + 3:00 Russia %z 2011 Mar 27 2:00s + 4:00 - %z # From Paul Eggert (2016-03-18): # Europe/Ulyanovsk covers: @@ -2777,14 +2963,14 @@ Zone Europe/Samara 3:20:20 - LMT 1919 Jul 1 0:00u # http://publication.pravo.gov.ru/Document/View/0001201603090051 Zone Europe/Ulyanovsk 3:13:36 - LMT 1919 Jul 1 0:00u - 3:00 - +03 1930 Jun 21 - 4:00 Russia +04/+05 1989 Mar 26 2:00s - 3:00 Russia +03/+04 1991 Mar 31 2:00s - 2:00 Russia +02/+03 1992 Jan 19 2:00s - 3:00 Russia +03/+04 2011 Mar 27 2:00s - 4:00 - +04 2014 Oct 26 2:00s - 3:00 - +03 2016 Mar 27 2:00s - 4:00 - +04 + 3:00 - %z 1930 Jun 21 + 4:00 Russia %z 1989 Mar 26 2:00s + 3:00 Russia %z 1991 Mar 31 2:00s + 2:00 Russia %z 1992 Jan 19 2:00s + 3:00 Russia %z 2011 Mar 27 2:00s + 4:00 - %z 2014 Oct 26 2:00s + 3:00 - %z 2016 Mar 27 2:00s + 4:00 - %z # From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2001-08-25): # Asia/Yekaterinburg covers... @@ -2809,12 +2995,12 @@ Zone Europe/Ulyanovsk 3:13:36 - LMT 1919 Jul 1 0:00u #STDOFF 4:02:32.9 Zone Asia/Yekaterinburg 4:02:33 - LMT 1916 Jul 3 3:45:05 - PMT 1919 Jul 15 4:00 - 4:00 - +04 1930 Jun 21 - 5:00 Russia +05/+06 1991 Mar 31 2:00s - 4:00 Russia +04/+05 1992 Jan 19 2:00s - 5:00 Russia +05/+06 2011 Mar 27 2:00s - 6:00 - +06 2014 Oct 26 2:00s - 5:00 - +05 + 4:00 - %z 1930 Jun 21 + 5:00 Russia %z 1991 Mar 31 2:00s + 4:00 Russia %z 1992 Jan 19 2:00s + 5:00 Russia %z 2011 Mar 27 2:00s + 6:00 - %z 2014 Oct 26 2:00s + 5:00 - %z # From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2001-08-25): @@ -2824,12 +3010,12 @@ Zone Asia/Yekaterinburg 4:02:33 - LMT 1916 Jul 3 # Byalokoz 1919 says Omsk was 4:53:30. Zone Asia/Omsk 4:53:30 - LMT 1919 Nov 14 - 5:00 - +05 1930 Jun 21 - 6:00 Russia +06/+07 1991 Mar 31 2:00s - 5:00 Russia +05/+06 1992 Jan 19 2:00s - 6:00 Russia +06/+07 2011 Mar 27 2:00s - 7:00 - +07 2014 Oct 26 2:00s - 6:00 - +06 + 5:00 - %z 1930 Jun 21 + 6:00 Russia %z 1991 Mar 31 2:00s + 5:00 Russia %z 1992 Jan 19 2:00s + 6:00 Russia %z 2011 Mar 27 2:00s + 7:00 - %z 2014 Oct 26 2:00s + 6:00 - %z # From Paul Eggert (2016-02-22): # Asia/Barnaul covers: @@ -2862,14 +3048,14 @@ Zone Asia/Omsk 4:53:30 - LMT 1919 Nov 14 # http://publication.pravo.gov.ru/Document/View/0001201603090038 Zone Asia/Barnaul 5:35:00 - LMT 1919 Dec 10 - 6:00 - +06 1930 Jun 21 - 7:00 Russia +07/+08 1991 Mar 31 2:00s - 6:00 Russia +06/+07 1992 Jan 19 2:00s - 7:00 Russia +07/+08 1995 May 28 - 6:00 Russia +06/+07 2011 Mar 27 2:00s - 7:00 - +07 2014 Oct 26 2:00s - 6:00 - +06 2016 Mar 27 2:00s - 7:00 - +07 + 6:00 - %z 1930 Jun 21 + 7:00 Russia %z 1991 Mar 31 2:00s + 6:00 Russia %z 1992 Jan 19 2:00s + 7:00 Russia %z 1995 May 28 + 6:00 Russia %z 2011 Mar 27 2:00s + 7:00 - %z 2014 Oct 26 2:00s + 6:00 - %z 2016 Mar 27 2:00s + 7:00 - %z # From Paul Eggert (2016-03-18): # Asia/Novosibirsk covers: @@ -2883,14 +3069,14 @@ Zone Asia/Barnaul 5:35:00 - LMT 1919 Dec 10 # http://publication.pravo.gov.ru/Document/View/0001201607040064 Zone Asia/Novosibirsk 5:31:40 - LMT 1919 Dec 14 6:00 - 6:00 - +06 1930 Jun 21 - 7:00 Russia +07/+08 1991 Mar 31 2:00s - 6:00 Russia +06/+07 1992 Jan 19 2:00s - 7:00 Russia +07/+08 1993 May 23 # say Shanks & P. - 6:00 Russia +06/+07 2011 Mar 27 2:00s - 7:00 - +07 2014 Oct 26 2:00s - 6:00 - +06 2016 Jul 24 2:00s - 7:00 - +07 + 6:00 - %z 1930 Jun 21 + 7:00 Russia %z 1991 Mar 31 2:00s + 6:00 Russia %z 1992 Jan 19 2:00s + 7:00 Russia %z 1993 May 23 # say Shanks & P. + 6:00 Russia %z 2011 Mar 27 2:00s + 7:00 - %z 2014 Oct 26 2:00s + 6:00 - %z 2016 Jul 24 2:00s + 7:00 - %z # From Paul Eggert (2016-03-18): # Asia/Tomsk covers: @@ -2935,14 +3121,14 @@ Zone Asia/Novosibirsk 5:31:40 - LMT 1919 Dec 14 6:00 # http://publication.pravo.gov.ru/Document/View/0001201604260048 Zone Asia/Tomsk 5:39:51 - LMT 1919 Dec 22 - 6:00 - +06 1930 Jun 21 - 7:00 Russia +07/+08 1991 Mar 31 2:00s - 6:00 Russia +06/+07 1992 Jan 19 2:00s - 7:00 Russia +07/+08 2002 May 1 3:00 - 6:00 Russia +06/+07 2011 Mar 27 2:00s - 7:00 - +07 2014 Oct 26 2:00s - 6:00 - +06 2016 May 29 2:00s - 7:00 - +07 + 6:00 - %z 1930 Jun 21 + 7:00 Russia %z 1991 Mar 31 2:00s + 6:00 Russia %z 1992 Jan 19 2:00s + 7:00 Russia %z 2002 May 1 3:00 + 6:00 Russia %z 2011 Mar 27 2:00s + 7:00 - %z 2014 Oct 26 2:00s + 6:00 - %z 2016 May 29 2:00s + 7:00 - %z # From Tim Parenti (2014-07-03): @@ -2973,12 +3159,12 @@ Zone Asia/Tomsk 5:39:51 - LMT 1919 Dec 22 # realigning itself with KRAT. Zone Asia/Novokuznetsk 5:48:48 - LMT 1924 May 1 - 6:00 - +06 1930 Jun 21 - 7:00 Russia +07/+08 1991 Mar 31 2:00s - 6:00 Russia +06/+07 1992 Jan 19 2:00s - 7:00 Russia +07/+08 2010 Mar 28 2:00s - 6:00 Russia +06/+07 2011 Mar 27 2:00s - 7:00 - +07 + 6:00 - %z 1930 Jun 21 + 7:00 Russia %z 1991 Mar 31 2:00s + 6:00 Russia %z 1992 Jan 19 2:00s + 7:00 Russia %z 2010 Mar 28 2:00s + 6:00 Russia %z 2011 Mar 27 2:00s + 7:00 - %z # From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2001-08-25): # Asia/Krasnoyarsk covers... @@ -2992,12 +3178,12 @@ Zone Asia/Novokuznetsk 5:48:48 - LMT 1924 May 1 # Byalokoz 1919 says Krasnoyarsk was 6:11:26. Zone Asia/Krasnoyarsk 6:11:26 - LMT 1920 Jan 6 - 6:00 - +06 1930 Jun 21 - 7:00 Russia +07/+08 1991 Mar 31 2:00s - 6:00 Russia +06/+07 1992 Jan 19 2:00s - 7:00 Russia +07/+08 2011 Mar 27 2:00s - 8:00 - +08 2014 Oct 26 2:00s - 7:00 - +07 + 6:00 - %z 1930 Jun 21 + 7:00 Russia %z 1991 Mar 31 2:00s + 6:00 Russia %z 1992 Jan 19 2:00s + 7:00 Russia %z 2011 Mar 27 2:00s + 8:00 - %z 2014 Oct 26 2:00s + 7:00 - %z # From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2001-08-25): @@ -3014,12 +3200,12 @@ Zone Asia/Krasnoyarsk 6:11:26 - LMT 1920 Jan 6 Zone Asia/Irkutsk 6:57:05 - LMT 1880 6:57:05 - IMT 1920 Jan 25 # Irkutsk Mean Time - 7:00 - +07 1930 Jun 21 - 8:00 Russia +08/+09 1991 Mar 31 2:00s - 7:00 Russia +07/+08 1992 Jan 19 2:00s - 8:00 Russia +08/+09 2011 Mar 27 2:00s - 9:00 - +09 2014 Oct 26 2:00s - 8:00 - +08 + 7:00 - %z 1930 Jun 21 + 8:00 Russia %z 1991 Mar 31 2:00s + 7:00 Russia %z 1992 Jan 19 2:00s + 8:00 Russia %z 2011 Mar 27 2:00s + 9:00 - %z 2014 Oct 26 2:00s + 8:00 - %z # From Tim Parenti (2014-07-06): @@ -3036,13 +3222,13 @@ Zone Asia/Irkutsk 6:57:05 - LMT 1880 # http://publication.pravo.gov.ru/Document/View/0001201512300107 Zone Asia/Chita 7:33:52 - LMT 1919 Dec 15 - 8:00 - +08 1930 Jun 21 - 9:00 Russia +09/+10 1991 Mar 31 2:00s - 8:00 Russia +08/+09 1992 Jan 19 2:00s - 9:00 Russia +09/+10 2011 Mar 27 2:00s - 10:00 - +10 2014 Oct 26 2:00s - 8:00 - +08 2016 Mar 27 2:00 - 9:00 - +09 + 8:00 - %z 1930 Jun 21 + 9:00 Russia %z 1991 Mar 31 2:00s + 8:00 Russia %z 1992 Jan 19 2:00s + 9:00 Russia %z 2011 Mar 27 2:00s + 10:00 - %z 2014 Oct 26 2:00s + 8:00 - %z 2016 Mar 27 2:00 + 9:00 - %z # From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2009-11-29): @@ -3082,12 +3268,12 @@ Zone Asia/Chita 7:33:52 - LMT 1919 Dec 15 # Byalokoz 1919 says Yakutsk was 8:38:58. Zone Asia/Yakutsk 8:38:58 - LMT 1919 Dec 15 - 8:00 - +08 1930 Jun 21 - 9:00 Russia +09/+10 1991 Mar 31 2:00s - 8:00 Russia +08/+09 1992 Jan 19 2:00s - 9:00 Russia +09/+10 2011 Mar 27 2:00s - 10:00 - +10 2014 Oct 26 2:00s - 9:00 - +09 + 8:00 - %z 1930 Jun 21 + 9:00 Russia %z 1991 Mar 31 2:00s + 8:00 Russia %z 1992 Jan 19 2:00s + 9:00 Russia %z 2011 Mar 27 2:00s + 10:00 - %z 2014 Oct 26 2:00s + 9:00 - %z # From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2009-11-29): @@ -3105,12 +3291,12 @@ Zone Asia/Yakutsk 8:38:58 - LMT 1919 Dec 15 # Go with Byalokoz. Zone Asia/Vladivostok 8:47:31 - LMT 1922 Nov 15 - 9:00 - +09 1930 Jun 21 - 10:00 Russia +10/+11 1991 Mar 31 2:00s - 9:00 Russia +09/+10 1992 Jan 19 2:00s - 10:00 Russia +10/+11 2011 Mar 27 2:00s - 11:00 - +11 2014 Oct 26 2:00s - 10:00 - +10 + 9:00 - %z 1930 Jun 21 + 10:00 Russia %z 1991 Mar 31 2:00s + 9:00 Russia %z 1992 Jan 19 2:00s + 10:00 Russia %z 2011 Mar 27 2:00s + 11:00 - %z 2014 Oct 26 2:00s + 10:00 - %z # From Tim Parenti (2014-07-03): @@ -3128,14 +3314,14 @@ Zone Asia/Vladivostok 8:47:31 - LMT 1922 Nov 15 # This transition is no doubt wrong, but we have no better info. Zone Asia/Khandyga 9:02:13 - LMT 1919 Dec 15 - 8:00 - +08 1930 Jun 21 - 9:00 Russia +09/+10 1991 Mar 31 2:00s - 8:00 Russia +08/+09 1992 Jan 19 2:00s - 9:00 Russia +09/+10 2004 - 10:00 Russia +10/+11 2011 Mar 27 2:00s - 11:00 - +11 2011 Sep 13 0:00s # Decree 725? - 10:00 - +10 2014 Oct 26 2:00s - 9:00 - +09 + 8:00 - %z 1930 Jun 21 + 9:00 Russia %z 1991 Mar 31 2:00s + 8:00 Russia %z 1992 Jan 19 2:00s + 9:00 Russia %z 2004 + 10:00 Russia %z 2011 Mar 27 2:00s + 11:00 - %z 2011 Sep 13 0:00s # Decree 725? + 10:00 - %z 2014 Oct 26 2:00s + 9:00 - %z # From Tim Parenti (2014-07-03): @@ -3151,14 +3337,14 @@ Zone Asia/Khandyga 9:02:13 - LMT 1919 Dec 15 # The Zone name should be Asia/Yuzhno-Sakhalinsk, but that's too long. Zone Asia/Sakhalin 9:30:48 - LMT 1905 Aug 23 - 9:00 - +09 1945 Aug 25 - 11:00 Russia +11/+12 1991 Mar 31 2:00s # Sakhalin T - 10:00 Russia +10/+11 1992 Jan 19 2:00s - 11:00 Russia +11/+12 1997 Mar lastSun 2:00s - 10:00 Russia +10/+11 2011 Mar 27 2:00s - 11:00 - +11 2014 Oct 26 2:00s - 10:00 - +10 2016 Mar 27 2:00s - 11:00 - +11 + 9:00 - %z 1945 Aug 25 + 11:00 Russia %z 1991 Mar 31 2:00s # Sakhalin T + 10:00 Russia %z 1992 Jan 19 2:00s + 11:00 Russia %z 1997 Mar lastSun 2:00s + 10:00 Russia %z 2011 Mar 27 2:00s + 11:00 - %z 2014 Oct 26 2:00s + 10:00 - %z 2016 Mar 27 2:00s + 11:00 - %z # From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2009-11-29): @@ -3181,13 +3367,13 @@ Zone Asia/Sakhalin 9:30:48 - LMT 1905 Aug 23 # http://publication.pravo.gov.ru/Document/View/0001201604050038 Zone Asia/Magadan 10:03:12 - LMT 1924 May 2 - 10:00 - +10 1930 Jun 21 # Magadan Time - 11:00 Russia +11/+12 1991 Mar 31 2:00s - 10:00 Russia +10/+11 1992 Jan 19 2:00s - 11:00 Russia +11/+12 2011 Mar 27 2:00s - 12:00 - +12 2014 Oct 26 2:00s - 10:00 - +10 2016 Apr 24 2:00s - 11:00 - +11 + 10:00 - %z 1930 Jun 21 # Magadan Time + 11:00 Russia %z 1991 Mar 31 2:00s + 10:00 Russia %z 1992 Jan 19 2:00s + 11:00 Russia %z 2011 Mar 27 2:00s + 12:00 - %z 2014 Oct 26 2:00s + 10:00 - %z 2016 Apr 24 2:00s + 11:00 - %z # From Tim Parenti (2014-07-06): @@ -3232,12 +3418,12 @@ Zone Asia/Magadan 10:03:12 - LMT 1924 May 2 # Go with Srednekolymsk. Zone Asia/Srednekolymsk 10:14:52 - LMT 1924 May 2 - 10:00 - +10 1930 Jun 21 - 11:00 Russia +11/+12 1991 Mar 31 2:00s - 10:00 Russia +10/+11 1992 Jan 19 2:00s - 11:00 Russia +11/+12 2011 Mar 27 2:00s - 12:00 - +12 2014 Oct 26 2:00s - 11:00 - +11 + 10:00 - %z 1930 Jun 21 + 11:00 Russia %z 1991 Mar 31 2:00s + 10:00 Russia %z 1992 Jan 19 2:00s + 11:00 Russia %z 2011 Mar 27 2:00s + 12:00 - %z 2014 Oct 26 2:00s + 11:00 - %z # From Tim Parenti (2014-07-03): @@ -3255,14 +3441,14 @@ Zone Asia/Srednekolymsk 10:14:52 - LMT 1924 May 2 # UTC+12 since at least then, too. Zone Asia/Ust-Nera 9:32:54 - LMT 1919 Dec 15 - 8:00 - +08 1930 Jun 21 - 9:00 Russia +09/+10 1981 Apr 1 - 11:00 Russia +11/+12 1991 Mar 31 2:00s - 10:00 Russia +10/+11 1992 Jan 19 2:00s - 11:00 Russia +11/+12 2011 Mar 27 2:00s - 12:00 - +12 2011 Sep 13 0:00s # Decree 725? - 11:00 - +11 2014 Oct 26 2:00s - 10:00 - +10 + 8:00 - %z 1930 Jun 21 + 9:00 Russia %z 1981 Apr 1 + 11:00 Russia %z 1991 Mar 31 2:00s + 10:00 Russia %z 1992 Jan 19 2:00s + 11:00 Russia %z 2011 Mar 27 2:00s + 12:00 - %z 2011 Sep 13 0:00s # Decree 725? + 11:00 - %z 2014 Oct 26 2:00s + 10:00 - %z # From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2001-08-25): @@ -3275,12 +3461,12 @@ Zone Asia/Ust-Nera 9:32:54 - LMT 1919 Dec 15 # The Zone name should be Asia/Petropavlovsk-Kamchatski or perhaps # Asia/Petropavlovsk-Kamchatsky, but these are too long. Zone Asia/Kamchatka 10:34:36 - LMT 1922 Nov 10 - 11:00 - +11 1930 Jun 21 - 12:00 Russia +12/+13 1991 Mar 31 2:00s - 11:00 Russia +11/+12 1992 Jan 19 2:00s - 12:00 Russia +12/+13 2010 Mar 28 2:00s - 11:00 Russia +11/+12 2011 Mar 27 2:00s - 12:00 - +12 + 11:00 - %z 1930 Jun 21 + 12:00 Russia %z 1991 Mar 31 2:00s + 11:00 Russia %z 1992 Jan 19 2:00s + 12:00 Russia %z 2010 Mar 28 2:00s + 11:00 Russia %z 2011 Mar 27 2:00s + 12:00 - %z # From Tim Parenti (2014-07-03): @@ -3288,13 +3474,13 @@ Zone Asia/Kamchatka 10:34:36 - LMT 1922 Nov 10 # 87 RU-CHU Chukotka Autonomous Okrug Zone Asia/Anadyr 11:49:56 - LMT 1924 May 2 - 12:00 - +12 1930 Jun 21 - 13:00 Russia +13/+14 1982 Apr 1 0:00s - 12:00 Russia +12/+13 1991 Mar 31 2:00s - 11:00 Russia +11/+12 1992 Jan 19 2:00s - 12:00 Russia +12/+13 2010 Mar 28 2:00s - 11:00 Russia +11/+12 2011 Mar 27 2:00s - 12:00 - +12 + 12:00 - %z 1930 Jun 21 + 13:00 Russia %z 1982 Apr 1 0:00s + 12:00 Russia %z 1991 Mar 31 2:00s + 11:00 Russia %z 1992 Jan 19 2:00s + 12:00 Russia %z 2010 Mar 28 2:00s + 11:00 Russia %z 2011 Mar 27 2:00s + 12:00 - %z # Bosnia & Herzegovina # Croatia @@ -3413,7 +3599,7 @@ Zone Africa/Ceuta -0:21:16 - LMT 1901 Jan 1 0:00u 1:00 - CET 1986 1:00 EU CE%sT Zone Atlantic/Canary -1:01:36 - LMT 1922 Mar # Las Palmas de Gran C. - -1:00 - -01 1946 Sep 30 1:00 + -1:00 - %z 1946 Sep 30 1:00 0:00 - WET 1980 Apr 6 0:00s 0:00 1:00 WEST 1980 Sep 28 1:00u 0:00 EU WE%sT @@ -3494,8 +3680,8 @@ Zone Atlantic/Canary -1:01:36 - LMT 1922 Mar # Las Palmas de Gran C. # but if no one is present after 11 at night, could be postponed until one # hour before the beginning of service. -# From Paul Eggert (2013-09-11): -# Round BMT to the nearest even second, 0:29:46. +# From Paul Eggert (2024-05-24): +# Express BMT as 0:29:45.500, approximately the same precision 7° 26' 22.50". # # We can find no reliable source for Shanks's assertion that all of Switzerland # except Geneva switched to Bern Mean Time at 00:00 on 1848-09-12. This book: @@ -3534,6 +3720,7 @@ Rule Swiss 1941 1942 - May Mon>=1 1:00 1:00 S Rule Swiss 1941 1942 - Oct Mon>=1 2:00 0 - # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Europe/Zurich 0:34:08 - LMT 1853 Jul 16 # See above comment. + #STDOFF 0:29:45.500 0:29:46 - BMT 1894 Jun # Bern Mean Time 1:00 Swiss CE%sT 1981 1:00 EU CE%sT @@ -3731,7 +3918,7 @@ Rule Turkey 1996 2006 - Oct lastSun 1:00s 0 - Zone Europe/Istanbul 1:55:52 - LMT 1880 1:56:56 - IMT 1910 Oct # Istanbul Mean Time? 2:00 Turkey EE%sT 1978 Jun 29 - 3:00 Turkey +03/+04 1984 Nov 1 2:00 + 3:00 Turkey %z 1984 Nov 1 2:00 2:00 Turkey EE%sT 2007 2:00 EU EE%sT 2011 Mar 27 1:00u 2:00 - EET 2011 Mar 28 1:00u @@ -3740,7 +3927,7 @@ Zone Europe/Istanbul 1:55:52 - LMT 1880 2:00 EU EE%sT 2015 Oct 25 1:00u 2:00 1:00 EEST 2015 Nov 8 1:00u 2:00 EU EE%sT 2016 Sep 7 - 3:00 - +03 + 3:00 - %z # Ukraine # diff --git a/leap-seconds.list b/leap-seconds.list index e52effc257b2..da0efc8c8566 100644 --- a/leap-seconds.list +++ b/leap-seconds.list @@ -1,5 +1,5 @@ -# ATOMIC TIME. -# The Coordinated Universal Time (UTC) is the reference time scale derived +# ATOMIC TIME +# Coordinated Universal Time (UTC) is the reference time scale derived # from The "Temps Atomique International" (TAI) calculated by the Bureau # International des Poids et Mesures (BIPM) using a worldwide network of atomic # clocks. UTC differs from TAI by an integer number of seconds; it is the basis @@ -8,34 +8,34 @@ # # ASTRONOMICAL TIME (UT1) is the time scale based on the rate of rotation of the earth. # It is now mainly derived from Very Long Baseline Interferometry (VLBI). The various -# irregular fluctuations progressively detected in the rotation rate of the Earth lead +# irregular fluctuations progressively detected in the rotation rate of the Earth led # in 1972 to the replacement of UT1 by UTC as the reference time scale. # # # LEAP SECOND -# Atomic clocks are more stable than the rate of the earth rotation since the latter +# Atomic clocks are more stable than the rate of the earth's rotation since the latter # undergoes a full range of geophysical perturbations at various time scales: lunisolar -# and core-mantle torques, atmospheric and oceanic effetcs, etc. +# and core-mantle torques, atmospheric and oceanic effects, etc. # Leap seconds are needed to keep the two time scales in agreement, i.e. UT1-UTC smaller -# than 0.9 second. Therefore, when necessary a "leap second" is applied to UTC. +# than 0.9 seconds. Therefore, when necessary a "leap second" is applied to UTC. # Since the adoption of this system in 1972 it has been necessary to add a number of seconds to UTC, # firstly due to the initial choice of the value of the second (1/86400 mean solar day of # the year 1820) and secondly to the general slowing down of the Earth's rotation. It is -# theorically possible to have a negative leap second (a second removed from UTC), but so far, +# theoretically possible to have a negative leap second (a second removed from UTC), but so far, # all leap seconds have been positive (a second has been added to UTC). Based on what we know about # the earth's rotation, it is unlikely that we will ever have a negative leap second. # # # HISTORY -# The first leap second was added on June 30, 1972. Until yhe year 2000, it was necessary in average to add a +# The first leap second was added on June 30, 1972. Until the year 2000, it was necessary in average to add a # leap second at a rate of 1 to 2 years. Since the year 2000 leap seconds are introduced with an -# average interval of 3 to 4 years due to the acceleration of the Earth rotation speed. +# average interval of 3 to 4 years due to the acceleration of the Earth's rotation speed. # # -# RESPONSABILITY OF THE DECISION TO INTRODUCE A LEAP SECOND IN UTC +# RESPONSIBILITY OF THE DECISION TO INTRODUCE A LEAP SECOND IN UTC # The decision to introduce a leap second in UTC is the responsibility of the Earth Orientation Center of # the International Earth Rotation and reference System Service (IERS). This center is located at Paris -# Observatory. According to international agreements, leap seconds should only be scheduled for certain dates: +# Observatory. According to international agreements, leap seconds should be scheduled only for certain dates: # first preference is given to the end of December and June, and second preference at the end of March # and September. Since the introduction of leap seconds in 1972, only dates in June and December were used. # @@ -60,15 +60,15 @@ # # The following line shows the last update of this file in NTP timestamp: # -#$ 3913697179 +#$ 3929093563 # # 2) Expiration date of the file given on a semi-annual basis: last June or last December # -# File expires on 28 December 2024 +# File expires on 28 June 2025 # # Expire date in NTP timestamp: # -#@ 3944332800 +#@ 3960057600 # # # LIST OF LEAP SECONDS @@ -117,4 +117,4 @@ # please see the readme file in the 'source' directory : # https://hpiers.obspm.fr/iers/bul/bulc/ntp/sources/README # -#h 9dac5845 8acd32c0 2947d462 daf4a943 f58d9391 +#h be738595 57b0cf1b b0218343 fb77062f 5a775e7 diff --git a/leapseconds b/leapseconds index ce150bfe0dca..6c715cb20b01 100644 --- a/leapseconds +++ b/leapseconds @@ -69,11 +69,11 @@ Leap 2016 Dec 31 23:59:60 + S # Any additional leap seconds will come after this. # This Expires line is commented out for now, # so that pre-2020a zic implementations do not reject this file. -#Expires 2024 Dec 28 00:00:00 +#Expires 2025 Jun 28 00:00:00 # POSIX timestamps for the data in this file: -#updated 1704708379 (2024-01-08 10:06:19 UTC) -#expires 1735344000 (2024-12-28 00:00:00 UTC) +#updated 1720104763 (2024-07-04 14:52:43 UTC) +#expires 1751068800 (2025-06-28 00:00:00 UTC) # Updated through IERS Bulletin C (https://hpiers.obspm.fr/iers/bul/bulc/bulletinc.dat) -# File expires on 28 December 2024 +# File expires on 28 June 2025 diff --git a/northamerica b/northamerica index bbfce49ba193..01f392e0e6a4 100644 --- a/northamerica +++ b/northamerica @@ -185,26 +185,6 @@ Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D Rule US 2007 max - Mar Sun>=8 2:00 1:00 D Rule US 2007 max - Nov Sun>=1 2:00 0 S -# From Arthur David Olson, 2005-12-19 -# We generate the files specified below to guard against old files with -# obsolete information being left in the time zone binary directory. -# We limit the list to names that have appeared in previous versions of -# this time zone package. -# We do these as separate Zones rather than as Links to avoid problems if -# a particular place changes whether it observes DST. -# We put these specifications here in the northamerica file both to -# increase the chances that they'll actually get compiled and to -# avoid the need to duplicate the US rules in another file. - -# Zone NAME STDOFF RULES FORMAT [UNTIL] -Zone EST -5:00 - EST -Zone MST -7:00 - MST -Zone HST -10:00 - HST -Zone EST5EDT -5:00 US E%sT -Zone CST6CDT -6:00 US C%sT -Zone MST7MDT -7:00 US M%sT -Zone PST8PDT -8:00 US P%sT - # From U. S. Naval Observatory (1989-01-19): # USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON # USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 @@ -2373,6 +2353,81 @@ Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 # the researchers who prepared the Decrees page failed to find some of # the relevant documents. +# From Heitor David Pinto (2024-08-04): +# In 1931, the decree implementing DST specified that it would take +# effect on 30 April.... +# https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=192270&pagina=2&seccion=1 +# +# In 1981, the decree changing Campeche, Yucatán and Quintana Roo to UTC-5 +# specified that it would enter into force on 26 December 1981 at 2:00.... +# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4705667&fecha=23/12/1981&cod_diario=202796 +# +# In 1982, the decree returning Campeche and Yucatán to UTC-6 specified that +# it would enter into force on 2 November 1982 at 2:00.... +# https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=205689&pagina=3&seccion=0 +# +# Quintana Roo changed to UTC-6 on 4 January 1983 at 0:00, and again +# to UTC-5 on 26 October 1997 at 2:00.... +# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4787355&fecha=28/12/1982&cod_diario=206112 +# https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=209559&pagina=15&seccion=0 +# +# Durango, Coahuila, Nuevo León and Tamaulipas were set to UTC-7 on 1 January +# 1922, and changed to UTC-6 on 10 June 1927. Then Durango, Coahuila and +# Nuevo León (but not Tamaulipas) returned to UTC-7 on 15 November 1930, +# observed DST in 1931, and changed again to UTC-6 on 1 April 1932.... +# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4441846&fecha=29/12/1921&cod_diario=187468 +# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4541520&fecha=09/06/1927&cod_diario=193920 +# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4491963&fecha=15/11/1930&cod_diario=190835 +# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4418437&fecha=21/01/1932&cod_diario=185588 +# +# ... the ... 10 June 1927 ... decree only said 10 June 1927, without +# specifying a time, so I suppose that it should be considered at 0:00. +# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4541520&fecha=09/06/1927&cod_diario=193920 +# +# In 1942, the decree changing Baja California, Baja California Sur, Sonora, +# Sinaloa and Nayarit to UTC-7 was published on 24 April, but it said that it +# would apply from 1 April, so it's unclear when the change actually +# occurred. The database currently shows 24 April 1942. +# https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=192203&pagina=2&seccion=1 +# +# Baja California Sur, Sonora, Sinaloa and Nayarit never used UTC-8. The ... +# 14 January 1949 ... change [to UTC-8] only occurred in Baja California. +# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4515613&fecha=13/01/1949&cod_diario=192309 +# +# In 1945, the decree changing Baja California to UTC-8 specified that it +# would take effect on the third day from its publication. +# It was published on 12 November, so it would take effect on 15 November.... +# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4555049&fecha=12/11/1945&cod_diario=194763 +# +# In 1948, the decree changing Baja California to UTC-7 specified that it +# would take effect on "this date". The decree was made on 13 March, +# but published on 5 April, so it's unclear when the change actually occurred. +# The database currently shows 5 April 1948. +# https://www.dof.gob.mx/nota_to_imagen_fs.php?cod_diario=188624&pagina=2&seccion=0 +# +# In 1949, the decree changing Baja California to UTC-8 was published on 13 +# January, but it said that it would apply from 1 January, so it's unclear when +# the change actually occurred. The database currently shows 14 January 1949. +# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4515613&fecha=13/01/1949&cod_diario=192309 +# +# Baja California also observed UTC-7 from 1 May to 24 September 1950, +# from 29 April to 30 September 1951 at 2:00, +# and from 27 April to 28 September 1952 at 2:00.... +# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4600403&fecha=29/04/1950&cod_diario=197505 +# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4623553&fecha=23/09/1950&cod_diario=198805 +# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4469444&fecha=27/04/1951&cod_diario=189317 +# https://www.dof.gob.mx/nota_to_imagen_fs.php?codnota=4533868&fecha=10/03/1952&cod_diario=193465 +# +# All changes in Baja California from 1948 to 1952 match those in California, +# on the same dates or with a difference of one day. +# So it may be easier to implement these changes as DST with rule CA +# during this whole period. +# +# From Paul Eggert (2024-08-18): +# For now, maintain the slightly-different history for Baja California, +# as we have no information on whether 1948/1952 clocks in Tijuana followed +# the decrees or followed San Diego. + # From Alan Perry (1996-02-15): # A guy from our Mexico subsidiary finally found the Presidential Decree # outlining the timezone changes in Mexico. @@ -2576,7 +2631,7 @@ Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 # http://puentelibre.mx/noticia/ciudad_juarez_cambio_horario_noviembre_2022/ # Rule NAME FROM TO - IN ON AT SAVE LETTER/S -Rule Mexico 1931 only - May 1 23:00 1:00 D +Rule Mexico 1931 only - April 30 0:00 1:00 D Rule Mexico 1931 only - Oct 1 0:00 0 S Rule Mexico 1939 only - Feb 5 0:00 1:00 D Rule Mexico 1939 only - Jun 25 0:00 0 S @@ -2595,14 +2650,16 @@ Rule Mexico 2002 2022 - Oct lastSun 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] # Quintana Roo; represented by Cancún Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 6:00u - -6:00 - CST 1981 Dec 23 + -6:00 - CST 1981 Dec 26 2:00 + -5:00 - EST 1983 Jan 4 0:00 + -6:00 Mexico C%sT 1997 Oct 26 2:00 -5:00 Mexico E%sT 1998 Aug 2 2:00 -6:00 Mexico C%sT 2015 Feb 1 2:00 -5:00 - EST # Campeche, Yucatán; represented by Mérida Zone America/Merida -5:58:28 - LMT 1922 Jan 1 6:00u - -6:00 - CST 1981 Dec 23 - -5:00 - EST 1982 Dec 2 + -6:00 - CST 1981 Dec 26 2:00 + -5:00 - EST 1982 Nov 2 2:00 -6:00 Mexico C%sT # Coahuila, Nuevo León, Tamaulipas (near US border) # This includes the following municipios: @@ -2619,12 +2676,15 @@ Zone America/Matamoros -6:30:00 - LMT 1922 Jan 1 6:00u -6:00 US C%sT # Durango; Coahuila, Nuevo León, Tamaulipas (away from US border) Zone America/Monterrey -6:41:16 - LMT 1922 Jan 1 6:00u + -7:00 - MST 1927 Jun 10 + -6:00 - CST 1930 Nov 15 + -7:00 Mexico M%sT 1932 Apr 1 -6:00 - CST 1988 -6:00 US C%sT 1989 -6:00 Mexico C%sT # Central Mexico Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 7:00u - -7:00 - MST 1927 Jun 10 23:00 + -7:00 - MST 1927 Jun 10 -6:00 - CST 1930 Nov 15 -7:00 Mexico M%sT 1932 Apr 1 -6:00 Mexico C%sT 2001 Sep 30 2:00 @@ -2635,7 +2695,7 @@ Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 7:00u # Práxedis G Guerrero. # http://gaceta.diputados.gob.mx/PDF/65/2a022/nov/20221124-VII.pdf Zone America/Ciudad_Juarez -7:05:56 - LMT 1922 Jan 1 7:00u - -7:00 - MST 1927 Jun 10 23:00 + -7:00 - MST 1927 Jun 10 -6:00 - CST 1930 Nov 15 -7:00 Mexico M%sT 1932 Apr 1 -6:00 - CST 1996 @@ -2650,7 +2710,7 @@ Zone America/Ciudad_Juarez -7:05:56 - LMT 1922 Jan 1 7:00u # Benavides. # http://gaceta.diputados.gob.mx/PDF/65/2a022/nov/20221124-VII.pdf Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 7:00u - -7:00 - MST 1927 Jun 10 23:00 + -7:00 - MST 1927 Jun 10 -6:00 - CST 1930 Nov 15 -7:00 Mexico M%sT 1932 Apr 1 -6:00 - CST 1996 @@ -2662,7 +2722,7 @@ Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 7:00u -6:00 US C%sT # Chihuahua (away from US border) Zone America/Chihuahua -7:04:20 - LMT 1922 Jan 1 7:00u - -7:00 - MST 1927 Jun 10 23:00 + -7:00 - MST 1927 Jun 10 -6:00 - CST 1930 Nov 15 -7:00 Mexico M%sT 1932 Apr 1 -6:00 - CST 1996 @@ -2672,23 +2732,21 @@ Zone America/Chihuahua -7:04:20 - LMT 1922 Jan 1 7:00u -6:00 - CST # Sonora Zone America/Hermosillo -7:23:52 - LMT 1922 Jan 1 7:00u - -7:00 - MST 1927 Jun 10 23:00 + -7:00 - MST 1927 Jun 10 -6:00 - CST 1930 Nov 15 -7:00 Mexico M%sT 1932 Apr 1 -6:00 - CST 1942 Apr 24 - -7:00 - MST 1949 Jan 14 - -8:00 - PST 1970 + -7:00 - MST 1996 -7:00 Mexico M%sT 1999 -7:00 - MST # Baja California Sur, Nayarit (except Bahía de Banderas), Sinaloa Zone America/Mazatlan -7:05:40 - LMT 1922 Jan 1 7:00u - -7:00 - MST 1927 Jun 10 23:00 + -7:00 - MST 1927 Jun 10 -6:00 - CST 1930 Nov 15 -7:00 Mexico M%sT 1932 Apr 1 -6:00 - CST 1942 Apr 24 - -7:00 - MST 1949 Jan 14 - -8:00 - PST 1970 + -7:00 - MST 1970 -7:00 Mexico M%sT # Bahía de Banderas @@ -2721,27 +2779,32 @@ Zone America/Mazatlan -7:05:40 - LMT 1922 Jan 1 7:00u # Use "Bahia_Banderas" to keep the name to fourteen characters. Zone America/Bahia_Banderas -7:01:00 - LMT 1922 Jan 1 7:00u - -7:00 - MST 1927 Jun 10 23:00 + -7:00 - MST 1927 Jun 10 -6:00 - CST 1930 Nov 15 -7:00 Mexico M%sT 1932 Apr 1 -6:00 - CST 1942 Apr 24 - -7:00 - MST 1949 Jan 14 - -8:00 - PST 1970 + -7:00 - MST 1970 -7:00 Mexico M%sT 2010 Apr 4 2:00 -6:00 Mexico C%sT # Baja California Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 7:00u -7:00 - MST 1924 - -8:00 - PST 1927 Jun 10 23:00 + -8:00 - PST 1927 Jun 10 -7:00 - MST 1930 Nov 15 -8:00 - PST 1931 Apr 1 -8:00 1:00 PDT 1931 Sep 30 -8:00 - PST 1942 Apr 24 -8:00 1:00 PWT 1945 Aug 14 23:00u - -8:00 1:00 PPT 1945 Nov 12 # Peace + -8:00 1:00 PPT 1945 Nov 15 # Peace -8:00 - PST 1948 Apr 5 -8:00 1:00 PDT 1949 Jan 14 + -8:00 - PST 1950 May 1 + -8:00 1:00 PDT 1950 Sep 24 + -8:00 - PST 1951 Apr 29 2:00 + -8:00 1:00 PDT 1951 Sep 30 2:00 + -8:00 - PST 1952 Apr 27 2:00 + -8:00 1:00 PDT 1952 Sep 28 2:00 -8:00 - PST 1954 -8:00 CA P%sT 1961 -8:00 - PST 1976 @@ -3550,8 +3613,8 @@ Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Miquelon -3:44:40 - LMT 1911 Jun 15 # St Pierre -4:00 - AST 1980 May - -3:00 - -03 1987 - -3:00 Canada -03/-02 + -3:00 - %z 1987 + -3:00 Canada %z # Turks and Caicos # diff --git a/southamerica b/southamerica index 344e67f38f4c..c8d9097aeb14 100644 --- a/southamerica +++ b/southamerica @@ -402,11 +402,11 @@ Rule Arg 2008 only - Oct Sun>=15 0:00 1:00 - Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31 #STDOFF -4:16:48.25 -4:16:48 - CMT 1920 May # Córdoba Mean Time - -4:00 - -04 1930 Dec - -4:00 Arg -04/-03 1969 Oct 5 - -3:00 Arg -03/-02 1999 Oct 3 - -4:00 Arg -04/-03 2000 Mar 3 - -3:00 Arg -03/-02 + -4:00 - %z 1930 Dec + -4:00 Arg %z 1969 Oct 5 + -3:00 Arg %z 1999 Oct 3 + -4:00 Arg %z 2000 Mar 3 + -3:00 Arg %z # # Córdoba (CB), Santa Fe (SF), Entre Ríos (ER), Corrientes (CN), Misiones (MN), # Chaco (CC), Formosa (FM), Santiago del Estero (SE) @@ -421,120 +421,120 @@ Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31 #STDOFF -4:16:48.25 Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31 -4:16:48 - CMT 1920 May - -4:00 - -04 1930 Dec - -4:00 Arg -04/-03 1969 Oct 5 - -3:00 Arg -03/-02 1991 Mar 3 - -4:00 - -04 1991 Oct 20 - -3:00 Arg -03/-02 1999 Oct 3 - -4:00 Arg -04/-03 2000 Mar 3 - -3:00 Arg -03/-02 + -4:00 - %z 1930 Dec + -4:00 Arg %z 1969 Oct 5 + -3:00 Arg %z 1991 Mar 3 + -4:00 - %z 1991 Oct 20 + -3:00 Arg %z 1999 Oct 3 + -4:00 Arg %z 2000 Mar 3 + -3:00 Arg %z # # Salta (SA), La Pampa (LP), Neuquén (NQ), Rio Negro (RN) Zone America/Argentina/Salta -4:21:40 - LMT 1894 Oct 31 #STDOFF -4:16:48.25 -4:16:48 - CMT 1920 May - -4:00 - -04 1930 Dec - -4:00 Arg -04/-03 1969 Oct 5 - -3:00 Arg -03/-02 1991 Mar 3 - -4:00 - -04 1991 Oct 20 - -3:00 Arg -03/-02 1999 Oct 3 - -4:00 Arg -04/-03 2000 Mar 3 - -3:00 Arg -03/-02 2008 Oct 18 - -3:00 - -03 + -4:00 - %z 1930 Dec + -4:00 Arg %z 1969 Oct 5 + -3:00 Arg %z 1991 Mar 3 + -4:00 - %z 1991 Oct 20 + -3:00 Arg %z 1999 Oct 3 + -4:00 Arg %z 2000 Mar 3 + -3:00 Arg %z 2008 Oct 18 + -3:00 - %z # # Tucumán (TM) Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31 #STDOFF -4:16:48.25 -4:16:48 - CMT 1920 May - -4:00 - -04 1930 Dec - -4:00 Arg -04/-03 1969 Oct 5 - -3:00 Arg -03/-02 1991 Mar 3 - -4:00 - -04 1991 Oct 20 - -3:00 Arg -03/-02 1999 Oct 3 - -4:00 Arg -04/-03 2000 Mar 3 - -3:00 - -03 2004 Jun 1 - -4:00 - -04 2004 Jun 13 - -3:00 Arg -03/-02 + -4:00 - %z 1930 Dec + -4:00 Arg %z 1969 Oct 5 + -3:00 Arg %z 1991 Mar 3 + -4:00 - %z 1991 Oct 20 + -3:00 Arg %z 1999 Oct 3 + -4:00 Arg %z 2000 Mar 3 + -3:00 - %z 2004 Jun 1 + -4:00 - %z 2004 Jun 13 + -3:00 Arg %z # # La Rioja (LR) Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31 #STDOFF -4:16:48.25 -4:16:48 - CMT 1920 May - -4:00 - -04 1930 Dec - -4:00 Arg -04/-03 1969 Oct 5 - -3:00 Arg -03/-02 1991 Mar 1 - -4:00 - -04 1991 May 7 - -3:00 Arg -03/-02 1999 Oct 3 - -4:00 Arg -04/-03 2000 Mar 3 - -3:00 - -03 2004 Jun 1 - -4:00 - -04 2004 Jun 20 - -3:00 Arg -03/-02 2008 Oct 18 - -3:00 - -03 + -4:00 - %z 1930 Dec + -4:00 Arg %z 1969 Oct 5 + -3:00 Arg %z 1991 Mar 1 + -4:00 - %z 1991 May 7 + -3:00 Arg %z 1999 Oct 3 + -4:00 Arg %z 2000 Mar 3 + -3:00 - %z 2004 Jun 1 + -4:00 - %z 2004 Jun 20 + -3:00 Arg %z 2008 Oct 18 + -3:00 - %z # # San Juan (SJ) Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31 #STDOFF -4:16:48.25 -4:16:48 - CMT 1920 May - -4:00 - -04 1930 Dec - -4:00 Arg -04/-03 1969 Oct 5 - -3:00 Arg -03/-02 1991 Mar 1 - -4:00 - -04 1991 May 7 - -3:00 Arg -03/-02 1999 Oct 3 - -4:00 Arg -04/-03 2000 Mar 3 - -3:00 - -03 2004 May 31 - -4:00 - -04 2004 Jul 25 - -3:00 Arg -03/-02 2008 Oct 18 - -3:00 - -03 + -4:00 - %z 1930 Dec + -4:00 Arg %z 1969 Oct 5 + -3:00 Arg %z 1991 Mar 1 + -4:00 - %z 1991 May 7 + -3:00 Arg %z 1999 Oct 3 + -4:00 Arg %z 2000 Mar 3 + -3:00 - %z 2004 May 31 + -4:00 - %z 2004 Jul 25 + -3:00 Arg %z 2008 Oct 18 + -3:00 - %z # # Jujuy (JY) Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31 #STDOFF -4:16:48.25 -4:16:48 - CMT 1920 May - -4:00 - -04 1930 Dec - -4:00 Arg -04/-03 1969 Oct 5 - -3:00 Arg -03/-02 1990 Mar 4 - -4:00 - -04 1990 Oct 28 - -4:00 1:00 -03 1991 Mar 17 - -4:00 - -04 1991 Oct 6 - -3:00 1:00 -02 1992 - -3:00 Arg -03/-02 1999 Oct 3 - -4:00 Arg -04/-03 2000 Mar 3 - -3:00 Arg -03/-02 2008 Oct 18 - -3:00 - -03 + -4:00 - %z 1930 Dec + -4:00 Arg %z 1969 Oct 5 + -3:00 Arg %z 1990 Mar 4 + -4:00 - %z 1990 Oct 28 + -4:00 1:00 %z 1991 Mar 17 + -4:00 - %z 1991 Oct 6 + -3:00 1:00 %z 1992 + -3:00 Arg %z 1999 Oct 3 + -4:00 Arg %z 2000 Mar 3 + -3:00 Arg %z 2008 Oct 18 + -3:00 - %z # # Catamarca (CT), Chubut (CH) Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31 #STDOFF -4:16:48.25 -4:16:48 - CMT 1920 May - -4:00 - -04 1930 Dec - -4:00 Arg -04/-03 1969 Oct 5 - -3:00 Arg -03/-02 1991 Mar 3 - -4:00 - -04 1991 Oct 20 - -3:00 Arg -03/-02 1999 Oct 3 - -4:00 Arg -04/-03 2000 Mar 3 - -3:00 - -03 2004 Jun 1 - -4:00 - -04 2004 Jun 20 - -3:00 Arg -03/-02 2008 Oct 18 - -3:00 - -03 + -4:00 - %z 1930 Dec + -4:00 Arg %z 1969 Oct 5 + -3:00 Arg %z 1991 Mar 3 + -4:00 - %z 1991 Oct 20 + -3:00 Arg %z 1999 Oct 3 + -4:00 Arg %z 2000 Mar 3 + -3:00 - %z 2004 Jun 1 + -4:00 - %z 2004 Jun 20 + -3:00 Arg %z 2008 Oct 18 + -3:00 - %z # # Mendoza (MZ) Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31 #STDOFF -4:16:48.25 -4:16:48 - CMT 1920 May - -4:00 - -04 1930 Dec - -4:00 Arg -04/-03 1969 Oct 5 - -3:00 Arg -03/-02 1990 Mar 4 - -4:00 - -04 1990 Oct 15 - -4:00 1:00 -03 1991 Mar 1 - -4:00 - -04 1991 Oct 15 - -4:00 1:00 -03 1992 Mar 1 - -4:00 - -04 1992 Oct 18 - -3:00 Arg -03/-02 1999 Oct 3 - -4:00 Arg -04/-03 2000 Mar 3 - -3:00 - -03 2004 May 23 - -4:00 - -04 2004 Sep 26 - -3:00 Arg -03/-02 2008 Oct 18 - -3:00 - -03 + -4:00 - %z 1930 Dec + -4:00 Arg %z 1969 Oct 5 + -3:00 Arg %z 1990 Mar 4 + -4:00 - %z 1990 Oct 15 + -4:00 1:00 %z 1991 Mar 1 + -4:00 - %z 1991 Oct 15 + -4:00 1:00 %z 1992 Mar 1 + -4:00 - %z 1992 Oct 18 + -3:00 Arg %z 1999 Oct 3 + -4:00 Arg %z 2000 Mar 3 + -3:00 - %z 2004 May 23 + -4:00 - %z 2004 Sep 26 + -3:00 Arg %z 2008 Oct 18 + -3:00 - %z # # San Luis (SL) @@ -544,53 +544,53 @@ Rule SanLuis 2007 2008 - Oct Sun>=8 0:00 1:00 - Zone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31 #STDOFF -4:16:48.25 -4:16:48 - CMT 1920 May - -4:00 - -04 1930 Dec - -4:00 Arg -04/-03 1969 Oct 5 - -3:00 Arg -03/-02 1990 - -3:00 1:00 -02 1990 Mar 14 - -4:00 - -04 1990 Oct 15 - -4:00 1:00 -03 1991 Mar 1 - -4:00 - -04 1991 Jun 1 - -3:00 - -03 1999 Oct 3 - -4:00 1:00 -03 2000 Mar 3 - -3:00 - -03 2004 May 31 - -4:00 - -04 2004 Jul 25 - -3:00 Arg -03/-02 2008 Jan 21 - -4:00 SanLuis -04/-03 2009 Oct 11 - -3:00 - -03 + -4:00 - %z 1930 Dec + -4:00 Arg %z 1969 Oct 5 + -3:00 Arg %z 1990 + -3:00 1:00 %z 1990 Mar 14 + -4:00 - %z 1990 Oct 15 + -4:00 1:00 %z 1991 Mar 1 + -4:00 - %z 1991 Jun 1 + -3:00 - %z 1999 Oct 3 + -4:00 1:00 %z 2000 Mar 3 + -3:00 - %z 2004 May 31 + -4:00 - %z 2004 Jul 25 + -3:00 Arg %z 2008 Jan 21 + -4:00 SanLuis %z 2009 Oct 11 + -3:00 - %z # # Santa Cruz (SC) Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31 #STDOFF -4:16:48.25 -4:16:48 - CMT 1920 May - -4:00 - -04 1930 Dec - -4:00 Arg -04/-03 1969 Oct 5 - -3:00 Arg -03/-02 1999 Oct 3 - -4:00 Arg -04/-03 2000 Mar 3 - -3:00 - -03 2004 Jun 1 - -4:00 - -04 2004 Jun 20 - -3:00 Arg -03/-02 2008 Oct 18 - -3:00 - -03 + -4:00 - %z 1930 Dec + -4:00 Arg %z 1969 Oct 5 + -3:00 Arg %z 1999 Oct 3 + -4:00 Arg %z 2000 Mar 3 + -3:00 - %z 2004 Jun 1 + -4:00 - %z 2004 Jun 20 + -3:00 Arg %z 2008 Oct 18 + -3:00 - %z # # Tierra del Fuego, Antártida e Islas del Atlántico Sur (TF) Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31 #STDOFF -4:16:48.25 -4:16:48 - CMT 1920 May - -4:00 - -04 1930 Dec - -4:00 Arg -04/-03 1969 Oct 5 - -3:00 Arg -03/-02 1999 Oct 3 - -4:00 Arg -04/-03 2000 Mar 3 - -3:00 - -03 2004 May 30 - -4:00 - -04 2004 Jun 20 - -3:00 Arg -03/-02 2008 Oct 18 - -3:00 - -03 + -4:00 - %z 1930 Dec + -4:00 Arg %z 1969 Oct 5 + -3:00 Arg %z 1999 Oct 3 + -4:00 Arg %z 2000 Mar 3 + -3:00 - %z 2004 May 30 + -4:00 - %z 2004 Jun 20 + -3:00 Arg %z 2008 Oct 18 + -3:00 - %z # Bolivia # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/La_Paz -4:32:36 - LMT 1890 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT -4:32:36 1:00 BST 1932 Mar 21 # Bolivia ST - -4:00 - -04 + -4:00 - %z # Brazil @@ -961,12 +961,12 @@ Rule Brazil 2018 only - Nov Sun>=1 0:00 1:00 - # # Fernando de Noronha (administratively part of PE) Zone America/Noronha -2:09:40 - LMT 1914 - -2:00 Brazil -02/-01 1990 Sep 17 - -2:00 - -02 1999 Sep 30 - -2:00 Brazil -02/-01 2000 Oct 15 - -2:00 - -02 2001 Sep 13 - -2:00 Brazil -02/-01 2002 Oct 1 - -2:00 - -02 + -2:00 Brazil %z 1990 Sep 17 + -2:00 - %z 1999 Sep 30 + -2:00 Brazil %z 2000 Oct 15 + -2:00 - %z 2001 Sep 13 + -2:00 Brazil %z 2002 Oct 1 + -2:00 - %z # Other Atlantic islands have no permanent settlement. # These include Trindade and Martim Vaz (administratively part of ES), # Rocas Atoll (RN), and the St Peter and St Paul Archipelago (PE). @@ -979,119 +979,119 @@ Zone America/Noronha -2:09:40 - LMT 1914 # In the north a very small part from the river Javary (now Jari I guess, # the border with Amapá) to the Amazon, then to the Xingu. Zone America/Belem -3:13:56 - LMT 1914 - -3:00 Brazil -03/-02 1988 Sep 12 - -3:00 - -03 + -3:00 Brazil %z 1988 Sep 12 + -3:00 - %z # # west Pará (PA) # West Pará includes Altamira, Óbidos, Prainha, Oriximiná, and Santarém. Zone America/Santarem -3:38:48 - LMT 1914 - -4:00 Brazil -04/-03 1988 Sep 12 - -4:00 - -04 2008 Jun 24 0:00 - -3:00 - -03 + -4:00 Brazil %z 1988 Sep 12 + -4:00 - %z 2008 Jun 24 0:00 + -3:00 - %z # # Maranhão (MA), Piauí (PI), Ceará (CE), Rio Grande do Norte (RN), # Paraíba (PB) Zone America/Fortaleza -2:34:00 - LMT 1914 - -3:00 Brazil -03/-02 1990 Sep 17 - -3:00 - -03 1999 Sep 30 - -3:00 Brazil -03/-02 2000 Oct 22 - -3:00 - -03 2001 Sep 13 - -3:00 Brazil -03/-02 2002 Oct 1 - -3:00 - -03 + -3:00 Brazil %z 1990 Sep 17 + -3:00 - %z 1999 Sep 30 + -3:00 Brazil %z 2000 Oct 22 + -3:00 - %z 2001 Sep 13 + -3:00 Brazil %z 2002 Oct 1 + -3:00 - %z # # Pernambuco (PE) (except Atlantic islands) Zone America/Recife -2:19:36 - LMT 1914 - -3:00 Brazil -03/-02 1990 Sep 17 - -3:00 - -03 1999 Sep 30 - -3:00 Brazil -03/-02 2000 Oct 15 - -3:00 - -03 2001 Sep 13 - -3:00 Brazil -03/-02 2002 Oct 1 - -3:00 - -03 + -3:00 Brazil %z 1990 Sep 17 + -3:00 - %z 1999 Sep 30 + -3:00 Brazil %z 2000 Oct 15 + -3:00 - %z 2001 Sep 13 + -3:00 Brazil %z 2002 Oct 1 + -3:00 - %z # # Tocantins (TO) Zone America/Araguaina -3:12:48 - LMT 1914 - -3:00 Brazil -03/-02 1990 Sep 17 - -3:00 - -03 1995 Sep 14 - -3:00 Brazil -03/-02 2003 Sep 24 - -3:00 - -03 2012 Oct 21 - -3:00 Brazil -03/-02 2013 Sep - -3:00 - -03 + -3:00 Brazil %z 1990 Sep 17 + -3:00 - %z 1995 Sep 14 + -3:00 Brazil %z 2003 Sep 24 + -3:00 - %z 2012 Oct 21 + -3:00 Brazil %z 2013 Sep + -3:00 - %z # # Alagoas (AL), Sergipe (SE) Zone America/Maceio -2:22:52 - LMT 1914 - -3:00 Brazil -03/-02 1990 Sep 17 - -3:00 - -03 1995 Oct 13 - -3:00 Brazil -03/-02 1996 Sep 4 - -3:00 - -03 1999 Sep 30 - -3:00 Brazil -03/-02 2000 Oct 22 - -3:00 - -03 2001 Sep 13 - -3:00 Brazil -03/-02 2002 Oct 1 - -3:00 - -03 + -3:00 Brazil %z 1990 Sep 17 + -3:00 - %z 1995 Oct 13 + -3:00 Brazil %z 1996 Sep 4 + -3:00 - %z 1999 Sep 30 + -3:00 Brazil %z 2000 Oct 22 + -3:00 - %z 2001 Sep 13 + -3:00 Brazil %z 2002 Oct 1 + -3:00 - %z # # Bahia (BA) # There are too many Salvadors elsewhere, so use America/Bahia instead # of America/Salvador. Zone America/Bahia -2:34:04 - LMT 1914 - -3:00 Brazil -03/-02 2003 Sep 24 - -3:00 - -03 2011 Oct 16 - -3:00 Brazil -03/-02 2012 Oct 21 - -3:00 - -03 + -3:00 Brazil %z 2003 Sep 24 + -3:00 - %z 2011 Oct 16 + -3:00 Brazil %z 2012 Oct 21 + -3:00 - %z # # Goiás (GO), Distrito Federal (DF), Minas Gerais (MG), # Espírito Santo (ES), Rio de Janeiro (RJ), São Paulo (SP), Paraná (PR), # Santa Catarina (SC), Rio Grande do Sul (RS) Zone America/Sao_Paulo -3:06:28 - LMT 1914 - -3:00 Brazil -03/-02 1963 Oct 23 0:00 - -3:00 1:00 -02 1964 - -3:00 Brazil -03/-02 + -3:00 Brazil %z 1963 Oct 23 0:00 + -3:00 1:00 %z 1964 + -3:00 Brazil %z # # Mato Grosso do Sul (MS) Zone America/Campo_Grande -3:38:28 - LMT 1914 - -4:00 Brazil -04/-03 + -4:00 Brazil %z # # Mato Grosso (MT) Zone America/Cuiaba -3:44:20 - LMT 1914 - -4:00 Brazil -04/-03 2003 Sep 24 - -4:00 - -04 2004 Oct 1 - -4:00 Brazil -04/-03 + -4:00 Brazil %z 2003 Sep 24 + -4:00 - %z 2004 Oct 1 + -4:00 Brazil %z # # Rondônia (RO) Zone America/Porto_Velho -4:15:36 - LMT 1914 - -4:00 Brazil -04/-03 1988 Sep 12 - -4:00 - -04 + -4:00 Brazil %z 1988 Sep 12 + -4:00 - %z # # Roraima (RR) Zone America/Boa_Vista -4:02:40 - LMT 1914 - -4:00 Brazil -04/-03 1988 Sep 12 - -4:00 - -04 1999 Sep 30 - -4:00 Brazil -04/-03 2000 Oct 15 - -4:00 - -04 + -4:00 Brazil %z 1988 Sep 12 + -4:00 - %z 1999 Sep 30 + -4:00 Brazil %z 2000 Oct 15 + -4:00 - %z # # east Amazonas (AM): Boca do Acre, Jutaí, Manaus, Floriano Peixoto # The great circle line from Tabatinga to Porto Acre divides # east from west Amazonas. Zone America/Manaus -4:00:04 - LMT 1914 - -4:00 Brazil -04/-03 1988 Sep 12 - -4:00 - -04 1993 Sep 28 - -4:00 Brazil -04/-03 1994 Sep 22 - -4:00 - -04 + -4:00 Brazil %z 1988 Sep 12 + -4:00 - %z 1993 Sep 28 + -4:00 Brazil %z 1994 Sep 22 + -4:00 - %z # # west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant, # Eirunepé, Envira, Ipixuna Zone America/Eirunepe -4:39:28 - LMT 1914 - -5:00 Brazil -05/-04 1988 Sep 12 - -5:00 - -05 1993 Sep 28 - -5:00 Brazil -05/-04 1994 Sep 22 - -5:00 - -05 2008 Jun 24 0:00 - -4:00 - -04 2013 Nov 10 - -5:00 - -05 + -5:00 Brazil %z 1988 Sep 12 + -5:00 - %z 1993 Sep 28 + -5:00 Brazil %z 1994 Sep 22 + -5:00 - %z 2008 Jun 24 0:00 + -4:00 - %z 2013 Nov 10 + -5:00 - %z # # Acre (AC) Zone America/Rio_Branco -4:31:12 - LMT 1914 - -5:00 Brazil -05/-04 1988 Sep 12 - -5:00 - -05 2008 Jun 24 0:00 - -4:00 - -04 2013 Nov 10 - -5:00 - -05 + -5:00 Brazil %z 1988 Sep 12 + -5:00 - %z 2008 Jun 24 0:00 + -4:00 - %z 2013 Nov 10 + -5:00 - %z # Chile @@ -1359,36 +1359,36 @@ Rule Chile 2023 max - Sep Sun>=2 4:00u 1:00 - # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Santiago -4:42:45 - LMT 1890 -4:42:45 - SMT 1910 Jan 10 # Santiago Mean Time - -5:00 - -05 1916 Jul 1 + -5:00 - %z 1916 Jul 1 -4:42:45 - SMT 1918 Sep 10 - -4:00 - -04 1919 Jul 1 + -4:00 - %z 1919 Jul 1 -4:42:45 - SMT 1927 Sep 1 - -5:00 Chile -05/-04 1932 Sep 1 - -4:00 - -04 1942 Jun 1 - -5:00 - -05 1942 Aug 1 - -4:00 - -04 1946 Jul 14 24:00 - -4:00 1:00 -03 1946 Aug 28 24:00 # central CL - -5:00 1:00 -04 1947 Mar 31 24:00 - -5:00 - -05 1947 May 21 23:00 - -4:00 Chile -04/-03 + -5:00 Chile %z 1932 Sep 1 + -4:00 - %z 1942 Jun 1 + -5:00 - %z 1942 Aug 1 + -4:00 - %z 1946 Jul 14 24:00 + -4:00 1:00 %z 1946 Aug 28 24:00 # central CL + -5:00 1:00 %z 1947 Mar 31 24:00 + -5:00 - %z 1947 May 21 23:00 + -4:00 Chile %z Zone America/Punta_Arenas -4:43:40 - LMT 1890 -4:42:45 - SMT 1910 Jan 10 - -5:00 - -05 1916 Jul 1 + -5:00 - %z 1916 Jul 1 -4:42:45 - SMT 1918 Sep 10 - -4:00 - -04 1919 Jul 1 + -4:00 - %z 1919 Jul 1 -4:42:45 - SMT 1927 Sep 1 - -5:00 Chile -05/-04 1932 Sep 1 - -4:00 - -04 1942 Jun 1 - -5:00 - -05 1942 Aug 1 - -4:00 - -04 1946 Aug 28 24:00 - -5:00 1:00 -04 1947 Mar 31 24:00 - -5:00 - -05 1947 May 21 23:00 - -4:00 Chile -04/-03 2016 Dec 4 - -3:00 - -03 + -5:00 Chile %z 1932 Sep 1 + -4:00 - %z 1942 Jun 1 + -5:00 - %z 1942 Aug 1 + -4:00 - %z 1946 Aug 28 24:00 + -5:00 1:00 %z 1947 Mar 31 24:00 + -5:00 - %z 1947 May 21 23:00 + -4:00 Chile %z 2016 Dec 4 + -3:00 - %z Zone Pacific/Easter -7:17:28 - LMT 1890 -7:17:28 - EMT 1932 Sep # Easter Mean Time - -7:00 Chile -07/-06 1982 Mar 14 3:00u # Easter Time - -6:00 Chile -06/-05 + -7:00 Chile %z 1982 Mar 14 3:00u # Easter Time + -6:00 Chile %z # # Salas y Gómez Island is uninhabited. # Other Chilean locations, including Juan Fernández Is, Desventuradas Is, @@ -1408,10 +1408,10 @@ Zone Pacific/Easter -7:17:28 - LMT 1890 # # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Antarctica/Palmer 0 - -00 1965 - -4:00 Arg -04/-03 1969 Oct 5 - -3:00 Arg -03/-02 1982 May - -4:00 Chile -04/-03 2016 Dec 4 - -3:00 - -03 + -4:00 Arg %z 1969 Oct 5 + -3:00 Arg %z 1982 May + -4:00 Chile %z 2016 Dec 4 + -3:00 - %z # Colombia @@ -1430,7 +1430,7 @@ Rule CO 1993 only - Feb 6 24:00 0 - #STDOFF -4:56:16.4 Zone America/Bogota -4:56:16 - LMT 1884 Mar 13 -4:56:16 - BMT 1914 Nov 23 # Bogotá Mean Time - -5:00 CO -05/-04 + -5:00 CO %z # Malpelo, Providencia, San Andres # no information; probably like America/Bogota @@ -1461,10 +1461,10 @@ Rule Ecuador 1993 only - Feb 5 0:00 0 - # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Guayaquil -5:19:20 - LMT 1890 -5:14:00 - QMT 1931 # Quito Mean Time - -5:00 Ecuador -05/-04 + -5:00 Ecuador %z Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno - -5:00 - -05 1986 - -6:00 Ecuador -06/-05 + -5:00 - %z 1986 + -6:00 Ecuador %z # Falklands @@ -1564,10 +1564,10 @@ Rule Falk 2001 2010 - Sep Sun>=1 2:00 1:00 - # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Atlantic/Stanley -3:51:24 - LMT 1890 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time - -4:00 Falk -04/-03 1983 May - -3:00 Falk -03/-02 1985 Sep 15 - -4:00 Falk -04/-03 2010 Sep 5 2:00 - -3:00 - -03 + -4:00 Falk %z 1983 May + -3:00 Falk %z 1985 Sep 15 + -4:00 Falk %z 2010 Sep 5 2:00 + -3:00 - %z # French Guiana # For the 1911/1912 establishment of standard time in French possessions, see: @@ -1575,8 +1575,8 @@ Zone Atlantic/Stanley -3:51:24 - LMT 1890 # page 752, 18b. # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Cayenne -3:29:20 - LMT 1911 Jul 1 - -4:00 - -04 1967 Oct - -3:00 - -03 + -4:00 - %z 1967 Oct + -3:00 - %z # Guyana @@ -1610,10 +1610,10 @@ Zone America/Cayenne -3:29:20 - LMT 1911 Jul 1 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Guyana -3:52:39 - LMT 1911 Aug 1 # Georgetown - -4:00 - -04 1915 Mar 1 - -3:45 - -0345 1975 Aug 1 - -3:00 - -03 1992 Mar 29 1:00 - -4:00 - -04 + -4:00 - %z 1915 Mar 1 + -3:45 - %z 1975 Aug 1 + -3:00 - %z 1992 Mar 29 1:00 + -4:00 - %z # Paraguay # @@ -1711,9 +1711,9 @@ Rule Para 2013 max - Mar Sun>=22 0:00 0 - # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Asuncion -3:50:40 - LMT 1890 -3:50:40 - AMT 1931 Oct 10 # Asunción Mean Time - -4:00 - -04 1972 Oct - -3:00 - -03 1974 Apr - -4:00 Para -04/-03 + -4:00 - %z 1972 Oct + -3:00 - %z 1974 Apr + -4:00 Para %z # Peru # @@ -1740,12 +1740,12 @@ Rule Peru 1994 only - Apr 1 0:00 0 - # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Lima -5:08:12 - LMT 1890 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time? - -5:00 Peru -05/-04 + -5:00 Peru %z # South Georgia # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken - -2:00 - -02 + -2:00 - %z # South Sandwich Is # uninhabited; scientific personnel have wintered @@ -1755,8 +1755,8 @@ Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken Zone America/Paramaribo -3:40:40 - LMT 1911 -3:40:52 - PMT 1935 # Paramaribo Mean Time -3:40:36 - PMT 1945 Oct # The capital moved? - -3:30 - -0330 1984 Oct - -3:00 - -03 + -3:30 - %z 1984 Oct + -3:00 - %z # Uruguay # From Paul Eggert (1993-11-18): @@ -1971,15 +1971,15 @@ Rule Uruguay 2006 2014 - Oct Sun>=1 2:00 1:00 - # This Zone can be simplified once we assume zic %z. Zone America/Montevideo -3:44:51 - LMT 1908 Jun 10 -3:44:51 - MMT 1920 May 1 # Montevideo MT - -4:00 - -04 1923 Oct 1 - -3:30 Uruguay -0330/-03 1942 Dec 14 - -3:00 Uruguay -03/-0230 1960 - -3:00 Uruguay -03/-02 1968 - -3:00 Uruguay -03/-0230 1970 - -3:00 Uruguay -03/-02 1974 - -3:00 Uruguay -03/-0130 1974 Mar 10 - -3:00 Uruguay -03/-0230 1974 Dec 22 - -3:00 Uruguay -03/-02 + -4:00 - %z 1923 Oct 1 + -3:30 Uruguay %z 1942 Dec 14 + -3:00 Uruguay %z 1960 + -3:00 Uruguay %z 1968 + -3:00 Uruguay %z 1970 + -3:00 Uruguay %z 1974 + -3:00 Uruguay %z 1974 Mar 10 + -3:00 Uruguay %z 1974 Dec 22 + -3:00 Uruguay %z # Venezuela # @@ -2013,7 +2013,7 @@ Zone America/Montevideo -3:44:51 - LMT 1908 Jun 10 # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Caracas -4:27:44 - LMT 1890 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time? - -4:30 - -0430 1965 Jan 1 0:00 - -4:00 - -04 2007 Dec 9 3:00 - -4:30 - -0430 2016 May 1 2:30 - -4:00 - -04 + -4:30 - %z 1965 Jan 1 0:00 + -4:00 - %z 2007 Dec 9 3:00 + -4:30 - %z 2016 May 1 2:30 + -4:00 - %z diff --git a/theory.html b/theory.html index 516d2a525111..d3573ede0dfb 100644 --- a/theory.html +++ b/theory.html @@ -89,13 +89,15 @@ The <code><abbr>tz</abbr></code> code is upwards compatible with <a href="https://en.wikipedia.org/wiki/POSIX">POSIX</a>, an international standard for <a href="https://en.wikipedia.org/wiki/Unix">UNIX</a>-like systems. -As of this writing, the current edition of POSIX is: <a +As of this writing, the current edition of POSIX is POSIX.1-2024, +which has been published but not yet in HTML form. +Unlike its predecessor POSIX.1-2017 (<a href="https://pubs.opengroup.org/onlinepubs/9699919799/"> The Open Group Base Specifications Issue 7</a>, IEEE Std 1003.1-2017, 2018 -Edition. -Because the database's scope encompasses real-world changes to civil -timekeeping, its model for describing time is more complex than the -standard and daylight saving times supported by POSIX.1-2017. +Edition), POSIX.1-2024 requires support for the +<code><abbr>tz</abbr></code> database, which has a +model for describing civil time that is more complex than the +standard and daylight saving times required by POSIX.1-2017. A <code><abbr>tz</abbr></code> timezone corresponds to a ruleset that can have more than two changes per year, these changes need not merely flip back and forth between two alternatives, and the rules themselves @@ -159,7 +161,7 @@ among the following goals: </ul> <p> -Names normally have the form +Names normally have the format <var>AREA</var><code>/</code><var>LOCATION</var>, where <var>AREA</var> is a continent or ocean, and <var>LOCATION</var> is a specific location within the area. @@ -187,7 +189,7 @@ in decreasing order of importance: href="https://en.wikipedia.org/wiki/ASCII">ASCII</a> letters, '<code>.</code>', '<code>-</code>' and '<code>_</code>'. Do not use digits, as that might create an ambiguity with <a - href="https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap08.html#tag_08_03">POSIX.1-2017 + href="https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap08.html#tag_08_03">POSIX's proleptic <code>TZ</code> strings</a>. A file name component must not exceed 14 characters or start with '<code>-</code>'. @@ -378,7 +380,8 @@ nowadays distributions typically use it and no great weight should be attached to whether a link is defined in <code>backward</code> or in some other file. The source file <code>etcetera</code> defines names that may be useful -on platforms that do not support POSIX.1-2017-style <code>TZ</code> strings; +on platforms that do not support proleptic <code>TZ</code> strings +like <code><+08>-8</code>; no other source file other than <code>backward</code> contains links to its zones. One of <code>etcetera</code>'s names is <code>Etc/UTC</code>, @@ -425,8 +428,8 @@ in decreasing order of importance: In other words, in the C locale the POSIX extended regular expression <code>[-+[:alnum:]]{3,6}</code> should match the abbreviation. - This guarantees that all abbreviations could have been specified by a - POSIX.1-2017 <code>TZ</code> string. + This guarantees that all abbreviations could have been specified + explicitly by a POSIX proleptic <code>TZ</code> string. </p> </li> <li> @@ -578,6 +581,11 @@ in decreasing order of importance: some sense undefined; this notation is derived from <a href="https://datatracker.ietf.org/doc/html/rfc3339">Internet <abbr title="Request For Comments">RFC</abbr> 3339</a>. + (The abbreviation 'Z' that + <a href="https://datatracker.ietf.org/doc/html/rfc9557">Internet + <abbr>RFC</abbr> 9557</a> uses for this concept + would violate the POSIX requirement + of at least three characters in an abbreviation.) </li> </ul> @@ -775,7 +783,7 @@ href="https://www.dissentmagazine.org/blog/booked-a-global-history-of-time-vanes the Western 06:00 to be 12:00. These practices are largely outside the scope of the <code><abbr>tz</abbr></code> code and data, which provide only limited support for date and time localization - such as that required by POSIX.1-2017. + such as that required by POSIX. If <abbr>DST</abbr> is not used a different time zone can often do the trick; for example, in Kenya a <code>TZ</code> setting like <code><-03>3</code> or <code>America/Cayenne</code> starts @@ -866,29 +874,62 @@ Code compatible with this package is already <a href="tz-link.html#tzdb">part of many platforms</a>, where the primary use of this package is to update obsolete time-related files. To do this, you may need to compile the time zone compiler -'<code>zic</code>' supplied with this package instead of using the -system '<code>zic</code>', since the format of <code>zic</code>'s +<code>zic</code> supplied with this package instead of using the +system <code>zic</code>, since the format of <code>zic</code>'s input is occasionally extended, and a platform may still be shipping an older <code>zic</code>. </p> -<h3 id="POSIX">POSIX.1-2017 properties and limitations</h3> +<p> +In POSIX, time display in a process is controlled by the +environment variable <code>TZ</code>, which can have two forms: +</p> <ul> <li> + A <dfn>proleptic <code>TZ</code></dfn> value + like <code>CET-1CEST,M3.5.0,M10.5.0/3</code> uses a complex + notation that specifies a single standard time along with daylight + saving rules that apply to all years past, present, and future. + </li> + <li> + A <dfn>geographical <code>TZ</code></dfn> value + like <code>Europe/Berlin</code> names a location that stands for + civil time near that location, which can have more than + one standard time and more than one set of daylight saving rules, + to record timekeeping practice more accurately. + These names are defined by the <code><abbr>tz</abbr></code> database. + </li> +</ul> + +<h3 id="POSIX.1-2017">POSIX.1-2017 properties and limitations</h3> +<p> +Some platforms support only the features required by POSIX.1-2017, +and have not yet upgraded to POSIX.1-2024. +Code intended to be portable to these platforms must deal +with problems that were fixed in later POSIX editions. +</p> + +<ul> + <li> + POSIX.1-2017 does not require support for geographical <code>TZ</code>, + and there is no convenient and efficient way to determine + the <abbr>UT</abbr> offset and time zone abbreviation of arbitrary + timestamps, particularly for timezones + that do not fit into the POSIX model. + </li> + <li> <p> - In POSIX.1-2017, time display in a process is controlled by the - environment variable <code>TZ</code>. - Unfortunately, the POSIX.1-2017 - <code>TZ</code> string takes a form that is hard to describe and - is error-prone in practice. - Also, POSIX.1-2017 <code>TZ</code> strings cannot deal with daylight + The proleptic <code>TZ</code> string, + which is all that POSIX.1-2017 requires, + has a format that is hard to describe and is error-prone in practice. + Also, proleptic <code>TZ</code> strings cannot deal with daylight saving time rules not based on the Gregorian calendar (as in Morocco), or with situations where more than two time zone abbreviations or <abbr>UT</abbr> offsets are used in an area. </p> <p> - The POSIX.1-2017 <code>TZ</code> string takes the following form: + A proleptic <code>TZ</code> string has the following format: </p> <p> @@ -955,7 +996,7 @@ an older <code>zic</code>. </dl> <p> - Here is an example POSIX.1-2017 <code>TZ</code> string for New + Here is an example proleptic <code>TZ</code> string for New Zealand after 2007. It says that standard time (<abbr>NZST</abbr>) is 12 hours ahead of <abbr>UT</abbr>, and that daylight saving time @@ -966,26 +1007,46 @@ an older <code>zic</code>. <pre><code>TZ='NZST-12NZDT,M9.5.0,M4.1.0/3'</code></pre> <p> - This POSIX.1-2017 <code>TZ</code> string is hard to remember, and + This proleptic <code>TZ</code> string is hard to remember, and mishandles some timestamps before 2008. - With this package you can use this instead: + With this package you can use a geographical <code>TZ</code> instead: </p> <pre><code>TZ='Pacific/Auckland'</code></pre> </li> +</ul> + +<p> +POSIX.1-2017 also has the limitations of POSIX.1-2024, +discussed in the next section. +</p> + +<h3 id="POSIX.1-2024">POSIX.1-2024 properties and limitations</h3> +<p> +POSIX.1-2024 extends POSIX.1-2017 in the following significant ways: +</p> +<ul> <li> - POSIX does not define the <abbr>DST</abbr> transitions - for <code>TZ</code> values like - "<code>EST5EDT</code>". - Traditionally the current <abbr>US</abbr> <abbr>DST</abbr> rules - were used to interpret such values, but this meant that the - <abbr>US</abbr> <abbr>DST</abbr> rules were compiled into each - time conversion package, and when - <abbr>US</abbr> time conversion rules changed (as in the United - States in 1987 and again in 2007), all packages that - interpreted <code>TZ</code> values had to be updated - to ensure proper results. + POSIX.1-2024 requires support for geographical <code>TZ</code>. + Earlier POSIX editions require support only for proleptic <code>TZ</code>. + </li> + <li> + POSIX.1-2024 requires <code>struct tm</code> + to have a <abbr>UT</abbr> offset member <code>tm_gmtoff</code> + and a time zone abbreviation member <code>tm_zone</code>. + Earlier POSIX editions lack this requirement. + </li> + <li> + DST transition times can range from −167:59:59 + to 167:59:59 instead of merely from 00:00:00 to 24:59:59. + This allows for proleptic TZ strings + like <code>"<-02>2<-01>,M3.5.0/-1,M10.5.0/0"</code> + where the transition time −1:00 means 23:00 the previous day. </li> +</ul> +<p> +However POSIX.1-2024, like earlier POSIX editions, has some limitations: +<ul> <li> The <code>TZ</code> environment variable is process-global, which makes it hard to write efficient, thread-safe applications that @@ -1004,16 +1065,34 @@ an older <code>zic</code>. limit phone calls to off-peak hours. </li> <li> - POSIX.1-2017 provides no convenient and efficient way to determine - the <abbr>UT</abbr> offset and time zone abbreviation of arbitrary - timestamps, particularly for timezones - that do not fit into the POSIX model. - </li> - <li> POSIX requires that <code>time_t</code> clock counts exclude leap seconds. </li> <li> + POSIX does not define the <abbr>DST</abbr> transitions + for <code>TZ</code> values like + "<code>EST5EDT</code>". + Traditionally the current <abbr>US</abbr> <abbr>DST</abbr> rules + were used to interpret such values, but this meant that the + <abbr>US</abbr> <abbr>DST</abbr> rules were compiled into each + time conversion package, and when + <abbr>US</abbr> time conversion rules changed (as in the United + States in 1987 and again in 2007), all packages that + interpreted <code>TZ</code> values had to be updated + to ensure proper results. + </li> +</ul> + +<h3 id="POSIX-extensions">Extensions to POSIX in the +<code><abbr>tz</abbr></code> code</h3> +<p> + The <code><abbr>tz</abbr></code> code defines some properties + left unspecified by POSIX, and attempts to support some + extensions to POSIX. +</p> + +<ul> + <li> The <code><abbr>tz</abbr></code> code attempts to support all the <code>time_t</code> implementations allowed by POSIX. The <code>time_t</code> type represents a nonnegative count of seconds @@ -1026,21 +1105,14 @@ an older <code>zic</code>. and 40-bit integers are also used occasionally. Although earlier POSIX versions allowed <code>time_t</code> to be a floating-point type, this was not supported by any practical system, - and POSIX.1-2013 and the <code><abbr>tz</abbr></code> code both + and POSIX.1-2013+ and the <code><abbr>tz</abbr></code> code both require <code>time_t</code> to be an integer type. </li> -</ul> - -<h3 id="POSIX-extensions">Extensions to POSIX.1-2017 in the -<code><abbr>tz</abbr></code> code</h3> -<ul> <li> <p> - The <code>TZ</code> environment variable is used in generating - the name of a file from which time-related information is read - (or is interpreted à la POSIX.1-2017); <code>TZ</code> is no longer - constrained to be a string containing abbreviations - and numeric data as described <a href="#POSIX">above</a>. + If the <code>TZ</code> environment variable uses the geographical format, + it is used in generating + the name of a file from which time-related information is read. The file's format is <dfn><abbr>TZif</abbr></dfn>, a timezone information format that contains binary data; see <a href="https://datatracker.ietf.org/doc/html/8536">Internet @@ -1053,10 +1125,11 @@ an older <code>zic</code>. abbreviations are used. </p> <p> - It was recognized that allowing the <code>TZ</code> environment + When the <code><abbr>tz</abbr></code> code was developed in the 1980s, + it was recognized that allowing the <code>TZ</code> environment variable to take on values such as '<code>America/New_York</code>' might cause "old" programs (that expect <code>TZ</code> to have a - certain form) to operate incorrectly; consideration was given to using + certain format) to operate incorrectly; consideration was given to using some other environment variable (for example, <code>TIMEZONE</code>) to hold the string used to generate the <abbr>TZif</abbr> file's name. In the end, however, it was decided to continue using @@ -1070,15 +1143,6 @@ an older <code>zic</code>. </p> </li> <li> - The code supports platforms with a <abbr>UT</abbr> offset member - in <code>struct tm</code>, e.g., <code>tm_gmtoff</code>, - or with a time zone abbreviation member in - <code>struct tm</code>, e.g., <code>tm_zone</code>. As noted - in <a href="https://austingroupbugs.net/view.php?id=1533">Austin - Group defect 1533</a>, a future version of POSIX is planned to - require <code>tm_gmtoff</code> and <code>tm_zone</code>. - </li> - <li> Functions <code>tzalloc</code>, <code>tzfree</code>, <code>localtime_rz</code>, and <code>mktime_z</code> for more-efficient thread-safe applications that need to use multiple @@ -1088,7 +1152,7 @@ an older <code>zic</code>. and <code>localtime_rz</code> and <code>mktime_z</code> are like <code>localtime_r</code> and <code>mktime</code> with an extra <code>timezone_t</code> argument. - The functions were inspired by <a href="https://netbsd.org/">NetBSD</a>. + The functions were inspired by <a href="https://netbsd.org">NetBSD</a>. </li> <li> Negative <code>time_t</code> values are supported, on systems @@ -1116,6 +1180,7 @@ The vestigial <abbr>API</abbr>s are: <li> The POSIX <code>tzname</code> variable does not suffice and is no longer needed. + It is planned to be removed in a future edition of POSIX. To get a timestamp's time zone abbreviation, consult the <code>tm_zone</code> member if available; otherwise, use <code>strftime</code>'s <code>"%Z"</code> conversion @@ -1124,6 +1189,7 @@ The vestigial <abbr>API</abbr>s are: <li> The POSIX <code>daylight</code> and <code>timezone</code> variables do not suffice and are no longer needed. + They are planned to be removed in a future edition of POSIX. To get a timestamp's <abbr>UT</abbr> offset, consult the <code>tm_gmtoff</code> member if available; otherwise, subtract values returned by <code>localtime</code> @@ -1278,13 +1344,13 @@ between now and the future time. <p> Leap seconds were introduced in 1972 to accommodate the difference between atomic time and the less regular rotation of the earth. -Unfortunately they caused so many problems with civil -timekeeping that they -are <a href="https://www.bipm.org/en/cgpm-2022/resolution-4">planned -to be discontinued by 2035</a>, with some as-yet-undetermined -mechanism replacing them, perhaps after the year 2135. -Despite their impending obsolescence, a record of leap seconds is still -needed to resolve timestamps from 1972 through 2035. +Unfortunately they have caused so many problems with civil +timekeeping that there are +<a href="https://www.bipm.org/en/cgpm-2022/resolution-4">plans +to discontinue them by 2035</a>. +Even if these plans come to fruition, a record of leap seconds will still be +needed to resolve timestamps from 1972 through 2035, +and there may also be a need to record whatever mechanism replaces them. </p> <p> @@ -1374,6 +1440,12 @@ href='https://www.esa.int/Applications/Navigation/Telling_time_on_the_Moon'>cons the establishment of a reference timescale for the Moon, which has days roughly equivalent to 29.5 Earth days, and where relativistic effects cause clocks to tick slightly faster than on Earth. +Also, <abbr title="National Aeronautics and Space Administration">NASA</abbr> +has been <a +href='https://www.whitehouse.gov/wp-content/uploads/2024/04/Celestial-Time-Standardization-Policy.pdf'>ordered</a> +to consider the establishment of Coordinated Lunar Time (<abbr>LTC</abbr>). +It is not yet known whether the US and European efforts will result in +multiple timescales on the Moon. </p> <p> @@ -1 +1 @@ -2024a +2024b diff --git a/ziguard.awk b/ziguard.awk index 7a3404fa4fcc..c0acb72a0380 100644 --- a/ziguard.awk +++ b/ziguard.awk @@ -5,14 +5,10 @@ # This is not a general-purpose converter; it is designed for current tzdata. # It just converts from current source to main, vanguard, and rearguard forms. # Although it might be nice for it to be idempotent, or to be useful -# for converting back and forth between vanguard and rearguard formats, +# for converting back and forth between formats, # it does not do these nonessential tasks now. # -# Although main and vanguard forms are currently equivalent, -# this need not always be the case. When the two forms differ, -# this script can convert either from main to vanguard form (needed then), -# or from vanguard to main form (this conversion would be needed later, -# after main became rearguard and vanguard became main). +# This script can convert from main to vanguard form and vice versa. # There is no need to convert rearguard to other forms. # # When converting to vanguard form, the output can use the line @@ -145,12 +141,12 @@ DATAFORM != "main" { } # If this line should differ due to Portugal benefiting from %z if supported, - # uncomment the desired version and comment out the undesired one. - if ($0 ~ /^#?[\t ]+-[12]:00[\t ]+Port[\t ]+[%+-]/) { - if (($0 ~ /%z/) == (DATAFORM == "vanguard")) { - uncomment = in_comment - } else { + # comment out the undesired version and uncomment the desired one. + if ($0 ~ /^#?[\t ]+-[12]:00[\t ]+((Port|W-Eur)[\t ]+[%+-]|-[\t ]+(%z|-01)[\t ]+1982 Mar 28)/) { + if (($0 ~ /%z/) == (DATAFORM == "rearguard")) { comment_out = !in_comment + } else { + uncomment = in_comment } } @@ -172,13 +168,8 @@ DATAFORM != "main" { sub(/^/, "#") } - # Prefer %z in vanguard form, explicit abbreviations otherwise. - if (DATAFORM == "vanguard") { - sub(/^(Zone[\t ]+[^\t ]+)?[\t ]+[^\t ]+[\t ]+[^\t ]+[\t ]+[-+][^\t ]+/, \ - "&CHANGE-TO-%z") - sub(/-00CHANGE-TO-%z/, "-00") - sub(/[-+][^\t ]+CHANGE-TO-/, "") - } else { + # Prefer explicit abbreviations in rearguard form, %z otherwise. + if (DATAFORM == "rearguard") { if ($0 ~ /^[^#]*%z/) { stdoff_column = 2 * ($0 ~ /^Zone/) + 1 rules_column = stdoff_column + 1 @@ -216,6 +207,11 @@ DATAFORM != "main" { } sub(/%z/, abbr) } + } else { + sub(/^(Zone[\t ]+[^\t ]+)?[\t ]+[^\t ]+[\t ]+[^\t ]+[\t ]+[-+][^\t ]+/, \ + "&CHANGE-TO-%z") + sub(/-00CHANGE-TO-%z/, "-00") + sub(/[-+][^\t ]+CHANGE-TO-/, "") } # Normally, prefer whole seconds. However, prefer subseconds @@ -264,8 +264,7 @@ MK +4159+02126 Europe/Skopje ML +1239-00800 Africa/Bamako MM +1647+09610 Asia/Yangon MN +4755+10653 Asia/Ulaanbaatar most of Mongolia -MN +4801+09139 Asia/Hovd Bayan-Olgiy, Govi-Altai, Hovd, Uvs, Zavkhan -MN +4804+11430 Asia/Choibalsan Dornod, Sukhbaatar +MN +4801+09139 Asia/Hovd Bayan-Olgii, Hovd, Uvs MO +221150+1133230 Asia/Macau MP +1512+14545 Pacific/Saipan MQ +1436-06105 America/Martinique diff --git a/zone1970.tab b/zone1970.tab index abd9489753f1..7726f39a0922 100644 --- a/zone1970.tab +++ b/zone1970.tab @@ -209,8 +209,7 @@ MD +4700+02850 Europe/Chisinau MH +0905+16720 Pacific/Kwajalein Kwajalein MM,CC +1647+09610 Asia/Yangon MN +4755+10653 Asia/Ulaanbaatar most of Mongolia -MN +4801+09139 Asia/Hovd Bayan-Ölgii, Govi-Altai, Hovd, Uvs, Zavkhan -MN +4804+11430 Asia/Choibalsan Dornod, Sükhbaatar +MN +4801+09139 Asia/Hovd Bayan-Ölgii, Hovd, Uvs MO +221150+1133230 Asia/Macau MQ +1436-06105 America/Martinique MT +3554+01431 Europe/Malta diff --git a/zonenow.tab b/zonenow.tab index b6f2910956fb..01f536b3ba38 100644 --- a/zonenow.tab +++ b/zonenow.tab @@ -5,7 +5,7 @@ # From Paul Eggert (2023-12-18): # This file contains a table where each row stands for a timezone # where civil timestamps are predicted to agree from now on. -# This file is like zone1970.tab (see zone1970.tab's coments), +# This file is like zone1970.tab (see zone1970.tab's comments), # but with the following changes: # # 1. Each timezone corresponds to a set of clocks that are planned @@ -123,8 +123,6 @@ XX +1455-02331 Atlantic/Cape_Verde Cape Verde # # -01/+00 (EU DST) XX +3744-02540 Atlantic/Azores Azores -# -01/+00 (EU DST) until 2024-03-31; then -02/-01 (EU DST) -XX +7029-02158 America/Scoresbysund Ittoqqortoormiit # # +00 - GMT XX +0519-00402 Africa/Abidjan far western Africa; Iceland ("GMT") @@ -199,7 +197,7 @@ XX +2518+05518 Asia/Dubai Russia; Caucasus; Persian Gulf; Seychelles; Réunion XX +3431+06912 Asia/Kabul Afghanistan # # +05 -XX +4120+06918 Asia/Tashkent Russia; west Kazakhstan; Tajikistan; Turkmenistan; Uzbekistan; Maldives +XX +4120+06918 Asia/Tashkent Russia; Kazakhstan; Tajikistan; Turkmenistan; Uzbekistan; Maldives # # +05 - PKT XX +2452+06703 Asia/Karachi Pakistan ("PKT") @@ -215,8 +213,6 @@ XX +2743+08519 Asia/Kathmandu Nepal # # +06 XX +2343+09025 Asia/Dhaka Russia; Kyrgyzstan; Bhutan; Bangladesh; Chagos -# +06 until 2024-03-01; then +05 -XX +4315+07657 Asia/Almaty Kazakhstan (except western areas) # # +06:30 XX +1647+09610 Asia/Yangon Myanmar; Cocos |