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-rw-r--r--share/zoneinfo/northamerica560
1 files changed, 377 insertions, 183 deletions
diff --git a/share/zoneinfo/northamerica b/share/zoneinfo/northamerica
index 9f9b98b09cb0..cc0ff49ae467 100644
--- a/share/zoneinfo/northamerica
+++ b/share/zoneinfo/northamerica
@@ -1,4 +1,4 @@
-# @(#)northamerica 7.87
+# @(#)northamerica 8.6
# <pre>
# also includes Central America and the Caribbean
@@ -30,12 +30,12 @@
# That 1883 transition occurred at 12:00 new time, not at 12:00 old time.
# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005).
-# From Paul Eggert (1995-12-19):
+# From Paul Eggert (2006-03-22):
# A good source for time zone historical data in the US is
# Thomas G. Shanks, The American Atlas (5th edition),
# San Diego: ACS Publications, Inc. (1991).
# Make sure you have the errata sheet; the book is somewhat useless without it.
-# It is the source for most of the pre-1991 US and Puerto Rico entries below.
+# It is the source for most of the pre-1991 US entries below.
# From Paul Eggert (2001-03-06):
# Daylight Saving Time was first suggested as a joke by Benjamin Franklin
@@ -229,7 +229,7 @@ Zone PST8PDT -8:00 US P%sT
# Public law 106-564 (2000-12-23) introduced the abbreviation
# "Chamorro Standard Time" for time in Guam and the Northern Marianas.
# See the file "australasia".
-
+
# From Arthur David Olson, 2005-08-09
# The following was signed into law on 2005-08-08.
#
@@ -274,7 +274,7 @@ Zone PST8PDT -8:00 US P%sT
# set their watches and clocks on Eastern time." It quotes H.H. "Bubba"
# Roberts, city administrator in Phenix City. as saying "We are in the Central
# time zone, but we do go by the Eastern time zone because so many people work
-# in Columbus."
+# in Columbus."
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
Rule NYC 1920 only - Mar lastSun 2:00 1:00 D
@@ -301,6 +301,13 @@ Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58
# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota,
# western Tennessee, most of Texas, Wisconsin
+# From Larry M. Smith (2006-04-26) re Wisconsin:
+# http://www.legis.state.wi.us/statutes/Stat0175.pdf ...
+# is currently enforced at the 01:00 time of change. Because the local
+# "bar time" in the state corresponds to 02:00, a number of citations
+# are issued for the "sale of class 'B' alcohol after prohibited
+# hours" within the deviated hour of this change every year....
+
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
Rule Chicago 1920 only - Jun 13 2:00 1:00 D
Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S
@@ -321,6 +328,16 @@ Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24
Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48
-7:00 US M%sT 1992 Oct 25 02:00
-6:00 US C%sT
+# Morton County, ND, switched from mountain to central time on
+# 2003-10-26, except for the area around Mandan which was already central time.
+# See <http://dmses.dot.gov/docimages/p63/135818.pdf>.
+# Officially this switch also included part of Sioux County, and
+# Jones, Mellette, and Todd Counties in South Dakota;
+# but in practice these other counties were already observing central time.
+# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>.
+Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21
+ -7:00 US M%sT 2003 Oct 26 02:00
+ -6:00 US C%sT
# US mountain time, represented by Denver
#
@@ -399,7 +416,8 @@ Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18
Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18
-9:59:36 - LMT 1900 Aug 20 12:00
-10:00 - CAT 1942
- -10:00 US CAT/CAWT 1946
+ -10:00 US CAT/CAWT 1945 Aug 14 23:00u
+ -10:00 US CAT/CAPT 1946 # Peace
-10:00 - CAT 1967 Apr
-10:00 - AHST 1969
-10:00 US AH%sT 1983 Oct 30 2:00
@@ -519,9 +537,9 @@ Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11
# For a map of Indiana's time zone regions, see:
# <a href="http://www.mccsc.edu/time.html">
# What time is it in Indiana?
-# </a> (2005-05-03)
+# </a> (2006-03-01)
#
-# From Paul Eggert (2005-08-22):
+# From Paul Eggert (2006-03-22):
# Since 1970, most of Indiana has been like America/Indiana/Indianapolis,
# with the following exceptions:
#
@@ -533,11 +551,15 @@ Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11
# - Clark, Floyd, and Harrison counties have been like
# America/Kentucky/Louisville.
#
-# - Crawford, Starke, and Switzerland counties have their own time zone
+# - Daviess, Dubois, Knox, Martin, Perry, and Pulaski counties
+# have been like America/Indiana/Vincennes.
+#
+# - Crawford, Pike, Starke, and Switzerland counties have their own time zone
# histories as noted below.
#
-# Shanks partitions Indiana into 345 regions, each with its own time history,
-# and writes ``Even newspaper reports present contradictory information.''
+# Shanks partitioned Indiana into 345 regions, each with its own time history,
+# and wrote ``Even newspaper reports present contradictory information.''
+# Those Hoosiers! Such a flighty and changeable people!
# Fortunately, most of the complexity occurred before our cutoff date of 1970.
#
# Other than Indianapolis, the Indiana place names are so nondescript
@@ -545,11 +567,21 @@ Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11
# So we reluctantly put them all in a subdirectory `America/Indiana'.
# From Paul Eggert (2005-08-16):
-# http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006,
-# and that many counties may switch either to Central or to Eastern time.
-# The county-by-county decisions have not been made yet, so for now assume
-# that no counties will switch: this assumption is most likely wrong,
-# but it's the best we can do for now.
+# http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006.
+
+# From Nathan Stratton Treadway (2006-03-30):
+# http://www.dot.gov/affairs/dot0406.htm [3705 B]
+# From Deborah Goldsmith (2006-01-18):
+# http://dmses.dot.gov/docimages/pdf95/382329_web.pdf [2.9 MB]
+# From Paul Eggert (2006-01-20):
+# It says "DOT is relocating the time zone boundary in Indiana to move Starke,
+# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the
+# Eastern Time Zone to the Central Time Zone.... The effective date of
+# this rule is 2:OO a.m. EST Sunday, April 2, 2006, which is the
+# changeover date from standard time to Daylight Saving Time."
+# Strictly speaking, this means the affected counties will change their
+# clocks twice that night, but this obviously is in error. The intent
+# is that 01:59:59 EST be followed by 02:00:00 CDT.
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D
@@ -568,8 +600,8 @@ Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22
-5:00 - EST 2006
-5:00 US E%sT
#
-# Part of Crawford County, Indiana, last observed DST in 1975,
-# and left its clocks alone in 1974.
+# Eastern Crawford County, Indiana, left its clocks alone in 1974,
+# as well as from 1976 through 2005.
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D
Rule Marengo 1951 only - Sep lastSun 2:00 0 S
@@ -586,7 +618,45 @@ Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37
-5:00 - EST 2006
-5:00 US E%sT
#
-# Starke County, Indiana
+# Daviess, Dubois, Knox, Martin, Perry, and Pulaski Counties, Indiana,
+# switched from eastern to central time in April 2006.
+# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
+Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D
+Rule Vincennes 1946 only - Sep lastSun 2:00 0 S
+Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D
+Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S
+Rule Vincennes 1955 only - May 1 0:00 1:00 D
+Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D
+Rule Vincennes 1960 only - Oct lastSun 2:00 0 S
+Rule Vincennes 1961 only - Sep lastSun 2:00 0 S
+Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S
+# Zone NAME GMTOFF RULES FORMAT [UNTIL]
+Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53
+ -6:00 US C%sT 1946
+ -6:00 Vincennes C%sT 1964 Apr 26 2:00
+ -5:00 - EST 1969
+ -5:00 US E%sT 1971
+ -5:00 - EST 2006 Apr 2 2:00
+ -6:00 US C%sT
+#
+# Pike County, Indiana moved from central to eastern time in 1977,
+# then switched back in 2006.
+# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
+Rule Pike 1955 only - May 1 0:00 1:00 D
+Rule Pike 1955 1960 - Sep lastSun 2:00 0 S
+Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D
+Rule Pike 1961 1964 - Oct lastSun 2:00 0 S
+# Zone NAME GMTOFF RULES FORMAT [UNTIL]
+Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53
+ -6:00 US C%sT 1955
+ -6:00 Pike C%sT 1965 Apr 25 2:00
+ -5:00 - EST 1966 Oct 30 2:00
+ -6:00 US C%sT 1977 Oct 30 2:00
+ -5:00 - EST 2006 Apr 2 2:00
+ -6:00 US C%sT
+#
+# Starke County, Indiana moved from central to eastern time in 1991,
+# then switched back in 2006.
# From Arthur David Olson (1991-10-28):
# An article on page A3 of the Sunday, 1991-10-27 Washington Post
# notes that Starke County switched from Central time to Eastern time as of
@@ -603,10 +673,10 @@ Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30
-6:00 Starke C%sT 1962 Apr 29 2:00
-5:00 - EST 1963 Oct 27 2:00
-6:00 US C%sT 1991 Oct 27 2:00
- -5:00 - EST 2006
- -5:00 US E%sT
+ -5:00 - EST 2006 Apr 2 2:00
+ -6:00 US C%sT
#
-# Switzerland County, Indiana, last observed DST in 1972.
+# Switzerland County, Indiana, did not observe DST from 1973 through 2005.
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44
-6:00 US C%sT 1954 Apr 25 2:00
@@ -636,7 +706,7 @@ Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58
-6:00 1:00 CDT 1974 Oct 27 2:00
-5:00 US E%sT
#
-# Wayne, Clinton, and Russell Counties, Kentucky
+# Wayne County, Kentucky
#
# From
# <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml">
@@ -733,7 +803,8 @@ Zone America/Detroit -5:32:11 - LMT 1905
-5:00 - EST 1975 Apr 27 2:00
-5:00 US E%sT
#
-# The Michigan border with Wisconsin switched from EST to CST/CDT in 1973.
+# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan,
+# switched from EST to CST/CDT in 1973.
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D
Rule Menominee 1946 only - Sep lastSun 2:00 0 S
@@ -760,10 +831,10 @@ Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00
################################################################################
-# From Paul Eggert (1999-10-29):
-# A good source for time zone historical data outside the US is
-# Thomas G. Shanks, The International Atlas (5th edition),
-# San Diego: ACS Publications, Inc. (1999).
+# From Paul Eggert (2006-03-22):
+# A good source for time zone historical data outside the U.S. is
+# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
+# San Diego: ACS Publications, Inc. (2003).
#
# Gwillim Law writes that a good source
# for recent time zone data is the International Air Transport
@@ -771,8 +842,8 @@ Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00
# published semiannually. Law sent in several helpful summaries
# of the IATA's data after 1990.
#
-# Except where otherwise noted, Shanks is the source for entries through 1990,
-# and IATA SSIM is the source for entries after 1990.
+# Except where otherwise noted, Shanks & Pottenger is the source for
+# entries through 1990, and IATA SSIM is the source for entries afterwards.
#
# Other sources occasionally used include:
#
@@ -820,9 +891,16 @@ Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00
# From Paul Eggert (1994-11-22):
# Alas, this sort of thing must be handled by localization software.
-# Unless otherwise specified, the data for Canada are all from Shanks.
+# Unless otherwise specified, the data for Canada are all from Shanks
+# & Pottenger.
+
+# From Chris Walton (2006-04-01):
+# The British Columbia government announced yesterday that it will
+# adjust daylight savings next year to align with changes in the
+# U.S. and the rest of Canada....
+# http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm
-# From Paul Eggert (2005-12-21):
+# From Paul Eggert (2006-04-25):
# H. David Matthews and Mary Vincent's map
# <a href="http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp">
# "It's about TIME", _Canadian Geographic_ (September-October 1998)
@@ -836,23 +914,14 @@ Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00
# Its unofficial information is often taken from Matthews and Vincent.
#
# CBC News reported that Ontario and Manitoba have announced plans to
-# follow the US change, and that Nova Scotia is considering it; see
+# follow the US change; see
# <http://www.cbc.ca/news/background/daylightsavingtime/> (2005-10-21).
# CBC news also reported that Prince Edward Island is the first
# province in Atlantic Canada to follow the US change, and that Quebec
# had agreed; see <http://www.cbc.ca/pei/story/pe_daylight_20051207.html>
-# (2005-12-07).
-#
-# To reflect all this, the Canada and Winn rules have been adjusted to
-# agree with the 2007 US change. This means we assume most of Canada
-# will fall into line. However, Alberta, British Columbia,
-# Newfoundland, Northwest Territories, and Yukon already have separate
-# rules in our database, so for now we'll leave them alone, which
-# means that we currently assume these regions will not change their
-# rules and will disagree with the US starting in 2007. This
-# assumption is probably incorrect, with the possible exception of
-# Newfoundland. We plan to adjust the Edm, Vanc, StJohns, and NT_YK
-# rules as the corresponding provinces make their announcements.
+# (2005-12-07). It also reported that Alberta will fall into line; see
+# <http://www.cbc.ca/calgary/story/ca_daylight20060202.html> (2006-02-02).
+# For now, assume all of Canada will fall into line.
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Canada 1918 only - Apr 14 2:00 1:00 D
@@ -878,20 +947,21 @@ Rule Canada 2007 max - Nov Sun>=1 2:00 0 S
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule StJohns 1917 only - Apr 8 2:00 1:00 D
Rule StJohns 1917 only - Sep 17 2:00 0 S
-# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks.
+# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger.
Rule StJohns 1919 only - May 5 23:00 1:00 D
Rule StJohns 1919 only - Aug 12 23:00 0 S
-# For 1931-1935 Whitman gives Apr same date; go with Shanks.
+# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger.
Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D
Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S
-# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks.
+# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks &
+# Pottenger.
Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D
Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S
# Whitman gives the following transitions:
# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07
-# but go with Shanks and assume they used Canadian rules.
+# but go with Shanks & Pottenger and assume they used Canadian rules.
# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives
-# Apr 30 - Sep 24; go with Shanks.
+# Apr 30 - Sep 24; go with Shanks & Pottenger.
Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D
Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S
Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D
@@ -901,9 +971,15 @@ Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S
# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches
# at 00:01 local time. For now, assume it started in 1987.
Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D
-Rule StJohns 1987 max - Oct lastSun 0:01 0 S
+Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S
Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD
-Rule StJohns 1989 max - Apr Sun>=1 0:01 1:00 D
+Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D
+# From Chris Walton (2006-04-05):
+# http://www.releases.gov.nl.ca/releases/2006/mpa/0331n01.htm
+# [This says Newfoundlandland expects to follow step with the US.]
+Rule StJohns 2007 max - Mar Sun>=8 0:01 1:00 D
+Rule StJohns 2007 max - Nov Sun>=1 0:01 0 S
+#
# St John's has an apostrophe, but Posix file names can't have apostrophes.
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/St_Johns -3:30:52 - LMT 1884
@@ -929,62 +1005,63 @@ Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay
-4:00 StJohns A%sT
-# west Labrador, New Brunswick, Nova Scotia, Prince Edward I
+# west Labrador, Nova Scotia, Prince Edward I
-# From Paul Eggert (1996-06-12):
-# Shanks writes that since 1970 most of this region has been like Halifax.
-# Many locales did not observe peacetime DST until 1972;
+# From Paul Eggert (2006-03-22):
+# Shanks & Pottenger write that since 1970 most of this region has been like
+# Halifax. Many locales did not observe peacetime DST until 1972;
# Glace Bay, NS is the largest that we know of.
-# Shanks also writes that Liverpool, NS was the only town in Canada to observe
-# DST in 1971 but not 1970; for now we'll assume this is a typo.
-
-# From Paul Eggert (2000-10-02):
-# INMS (2000-09-12) says that, since 1988 at least, New Brunswick switches
-# at 00:01 local time. FIXME: verify and create a new Zone for this.
+# Shanks & Pottenger also write that Liverpool, NS was the only town
+# in Canada to observe DST in 1971 but not 1970; for now we'll assume
+# this is a typo.
+# From Chris Walton (2006-04-25):
+# Daylight saving time will be extended by four weeks starting in 2007....
+# Here is a news release which was issued today by the Nova Scotia government:
+# http://www.gov.ns.ca/news/details.asp?id=20060425004
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
-Rule Halifax 1916 only - Apr 1 0:00 1:00 D
-Rule Halifax 1916 only - Oct 1 0:00 0 S
-Rule Halifax 1920 only - May 9 0:00 1:00 D
-Rule Halifax 1920 only - Aug 29 0:00 0 S
-Rule Halifax 1921 only - May 6 0:00 1:00 D
-Rule Halifax 1921 1922 - Sep 5 0:00 0 S
-Rule Halifax 1922 only - Apr 30 0:00 1:00 D
-Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D
-Rule Halifax 1923 only - Sep 4 0:00 0 S
-Rule Halifax 1924 only - Sep 15 0:00 0 S
-Rule Halifax 1925 only - Sep 28 0:00 0 S
-Rule Halifax 1926 only - May 16 0:00 1:00 D
-Rule Halifax 1926 only - Sep 13 0:00 0 S
-Rule Halifax 1927 only - May 1 0:00 1:00 D
-Rule Halifax 1927 only - Sep 26 0:00 0 S
-Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D
-Rule Halifax 1928 only - Sep 9 0:00 0 S
-Rule Halifax 1929 only - Sep 3 0:00 0 S
-Rule Halifax 1930 only - Sep 15 0:00 0 S
-Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S
-Rule Halifax 1932 only - May 1 0:00 1:00 D
-Rule Halifax 1933 only - Apr 30 0:00 1:00 D
-Rule Halifax 1933 only - Oct 2 0:00 0 S
-Rule Halifax 1934 only - May 20 0:00 1:00 D
-Rule Halifax 1934 only - Sep 16 0:00 0 S
-Rule Halifax 1935 only - Jun 2 0:00 1:00 D
-Rule Halifax 1935 only - Sep 30 0:00 0 S
-Rule Halifax 1936 only - Jun 1 0:00 1:00 D
-Rule Halifax 1936 only - Sep 14 0:00 0 S
-Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D
-Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S
-Rule Halifax 1939 only - May 28 0:00 1:00 D
-Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D
-Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S
-Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D
-Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S
-Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D
-Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S
-Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D
-Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D
-Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S
+Rule Halifax 1916 only - Apr 1 0:00 1:00 D
+Rule Halifax 1916 only - Oct 1 0:00 0 S
+Rule Halifax 1920 only - May 9 0:00 1:00 D
+Rule Halifax 1920 only - Aug 29 0:00 0 S
+Rule Halifax 1921 only - May 6 0:00 1:00 D
+Rule Halifax 1921 1922 - Sep 5 0:00 0 S
+Rule Halifax 1922 only - Apr 30 0:00 1:00 D
+Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D
+Rule Halifax 1923 only - Sep 4 0:00 0 S
+Rule Halifax 1924 only - Sep 15 0:00 0 S
+Rule Halifax 1925 only - Sep 28 0:00 0 S
+Rule Halifax 1926 only - May 16 0:00 1:00 D
+Rule Halifax 1926 only - Sep 13 0:00 0 S
+Rule Halifax 1927 only - May 1 0:00 1:00 D
+Rule Halifax 1927 only - Sep 26 0:00 0 S
+Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D
+Rule Halifax 1928 only - Sep 9 0:00 0 S
+Rule Halifax 1929 only - Sep 3 0:00 0 S
+Rule Halifax 1930 only - Sep 15 0:00 0 S
+Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S
+Rule Halifax 1932 only - May 1 0:00 1:00 D
+Rule Halifax 1933 only - Apr 30 0:00 1:00 D
+Rule Halifax 1933 only - Oct 2 0:00 0 S
+Rule Halifax 1934 only - May 20 0:00 1:00 D
+Rule Halifax 1934 only - Sep 16 0:00 0 S
+Rule Halifax 1935 only - Jun 2 0:00 1:00 D
+Rule Halifax 1935 only - Sep 30 0:00 0 S
+Rule Halifax 1936 only - Jun 1 0:00 1:00 D
+Rule Halifax 1936 only - Sep 14 0:00 0 S
+Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D
+Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S
+Rule Halifax 1939 only - May 28 0:00 1:00 D
+Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D
+Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D
+Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S
+Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D
+Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S
+Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D
+Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S
+Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D
+Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Halifax -4:14:24 - LMT 1902 Jun 15
-4:00 Halifax A%sT 1918
@@ -1000,12 +1077,49 @@ Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15
-4:00 Halifax A%sT 1974
-4:00 Canada A%sT
+# New Brunswick
+
+# From Paul Eggert (2006-01-20):
+# New Brunswick's Time Definition Act
+# <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> says they change at 00:01, and
+# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it
+# clear that this has been the case since at least 1993.
+# For now, assume it started in 1993. The Office of the Premier announced
+# <http://www.gnb.ca/cnb/news/pre/2005e1737pr.htm> (2005-12-23)
+# that they will bring forward proposed amendments to harmonize with the US;
+# for now assume that this will happen, but they'll still switch at 00:01.
+
+# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
+Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D
+Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S
+Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D
+Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S
+Rule Moncton 1939 only - May 27 1:00 1:00 D
+Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S
+Rule Moncton 1940 only - May 19 1:00 1:00 D
+Rule Moncton 1941 only - May 4 1:00 1:00 D
+Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D
+Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S
+Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S
+Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D
+Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S
+Rule Moncton 2007 max - Mar Sun>=8 0:01 1:00 D
+Rule Moncton 2007 max - Nov Sun>=1 0:01 0 S
+# Zone NAME GMTOFF RULES FORMAT [UNTIL]
+Zone America/Moncton -4:19:08 - LMT 1883 Dec 9
+ -5:00 - EST 1902 Jun 15
+ -4:00 Canada A%sT 1933
+ -4:00 Moncton A%sT 1942
+ -4:00 Canada A%sT 1946
+ -4:00 Moncton A%sT 1973
+ -4:00 Canada A%sT 1993
+ -4:00 Moncton A%sT
# Ontario, Quebec
-# From Paul Eggert (1996-06-12):
-# Shanks writes that since 1970 most of Ontario has been like Toronto,
-# and most of Quebec has been like Montreal.
+# From Paul Eggert (2006-03-22):
+# Shanks & Pottenger writes that since 1970 most of Ontario has been like
+# Toronto, and most of Quebec has been like Montreal.
# Thunder Bay skipped DST in 1973.
# Many smaller locales did not observe peacetime DST until 1974;
# Nipigon (EST) and Rainy River (CST) are the largest that we know of.
@@ -1035,7 +1149,9 @@ Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15
# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT.
# Officially Atikokan is therefore on CST/CDT, and most likely this report
# concerns a non-official time observed as a matter of local practice.
-# For what it's worth, Shanks says that Atikokan has agreed with
+#
+# From Paul Eggert (2006-03-22):
+# For what it's worth, Shanks & Pottenger say that Atikokan has agreed with
# Rainy River ever since standard time was introduced.
# From Paul Eggert (2000-10-02):
@@ -1086,7 +1202,8 @@ Rule Toronto 1920 only - Sep 26 0:00 0 S
Rule Toronto 1921 only - May 15 2:00 1:00 D
Rule Toronto 1921 only - Sep 15 2:00 0 S
Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D
-# Shanks says 1923-09-19; assume it's a typo and that "-16" was meant.
+# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16"
+# was meant.
Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S
Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D
# The 1927-to-1939 rules can be expressed more simply as
@@ -1110,9 +1227,10 @@ Rule Toronto 1949 only - Nov lastSun 0:00 0 S
Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D
Rule Toronto 1950 only - Nov lastSun 2:00 0 S
Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S
-# Shanks says Toronto ended DST a week early in 1971, namely on 1971-10-24,
-# but Mark Brader wrote (2003-05-31) that he checked the 1971-10-30 issue
-# of the Toronto Star, and it said that DST ended 1971-10-31 as usual.
+# Shanks & Pottenger say Toronto ended DST a week early in 1971,
+# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that he
+# checked the 1971-10-30 issue of the Toronto Star, and it said that
+# DST ended 1971-10-31 as usual.
Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S
# From Paul Eggert (2003-07-27):
@@ -1166,6 +1284,30 @@ Zone America/Rainy_River -6:17:56 - LMT 1895
# Manitoba
+# From Chris Walton (2006-04-05):
+# Here is a copy of the new official time act ...
+# http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php
+# The act indicates that daylight savings ends at 2:00am.
+
+# From Rob Douglas (2006-04-06):
+# the old Manitoba Time Act - as amended by Bill 2, assented to
+# March 27, 1987 ... said ...
+# "between two o'clock Central Standard Time in the morning of
+# the first Sunday of April of each year and two o'clock Central
+# Standard Time in the morning of the last Sunday of October next
+# following, one hour in advance of Central Standard Time."...
+# I believe that the English legislation [of the old time act] had =
+# been assented to (March 22, 1967)....
+# Also, as far as I can tell, there was no order-in-council varying
+# the time of Daylight Saving Time for 2005 and so the provisions of
+# the 1987 version would apply - the changeover was at 2:00 Central
+# Standard Time (i.e. not until 3:00 Central Daylight Time).
+
+# From Paul Eggert (2006-04-10):
+# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s)
+# starting 1966. Since 02:00s is clearly correct for 1967 on, assume
+# it was also 02:00s in 1966.
+
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Winn 1916 only - Apr 23 0:00 1:00 D
Rule Winn 1916 only - Sep 17 0:00 0 S
@@ -1188,18 +1330,13 @@ Rule Winn 1959 only - Oct lastSun 2:00 0 S
Rule Winn 1960 only - Sep lastSun 2:00 0 S
Rule Winn 1963 only - Apr lastSun 2:00 1:00 D
Rule Winn 1963 only - Sep 22 2:00 0 S
-Rule Winn 1966 1986 - Apr lastSun 2:00 1:00 D
-Rule Winn 1966 1986 - Oct lastSun 2:00 0 S
-Rule Winn 1987 2006 - Apr Sun>=1 2:00s 1:00 D
-# From Paul Eggert (2000-10-02):
-# INMS (2000-09-12) says that, since 1988 at least, Manitoba switches from
-# DST at 03:00 local time. For now, assume it started in 1987.
-Rule Winn 1987 2006 - Oct lastSun 2:00s 0 S
-Rule Winn 2007 max - Mar Sun>=8 2:00s 1:00 D
-Rule Winn 2007 max - Nov Sun>=1 2:00s 0 S
+Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D
+Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S
+Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16
- -6:00 Winn C%sT
+ -6:00 Winn C%sT 2006
+ -6:00 Canada C%sT
# Saskatchewan
@@ -1218,8 +1355,8 @@ Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16
# Willett (1914-03) notes that DST "has been in operation ... in the
# City of Moose Jaw, Saskatchewan, for one year."
-# From Paul Eggert (2000-10-02):
-# Shanks writes that since 1970 most of this region has been like Regina.
+# From Paul Eggert (2006-03-22):
+# Shanks & Pottenger say that since 1970 this region has mostly been as Regina.
# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972.
# Other western towns (e.g. Lloydminster) are like Edmonton.
# Matthews and Vincent (1998) write that Denare Beach and Creighton
@@ -1305,17 +1442,18 @@ Rule Edm 1967 only - Oct lastSun 2:00 0 S
Rule Edm 1969 only - Apr lastSun 2:00 1:00 D
Rule Edm 1969 only - Oct lastSun 2:00 0 S
Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D
-Rule Edm 1972 max - Oct lastSun 2:00 0 S
-Rule Edm 1987 max - Apr Sun>=1 2:00 1:00 D
+Rule Edm 1972 2006 - Oct lastSun 2:00 0 S
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Edmonton -7:33:52 - LMT 1906 Sep
- -7:00 Edm M%sT
+ -7:00 Edm M%sT 1987
+ -7:00 Canada M%sT
# British Columbia
-# From Paul Eggert (2000-10-02):
-# Shanks writes that since 1970 most of this region has been like Vancouver.
+# From Paul Eggert (2006-03-22):
+# Shanks & Pottenger write that since 1970 most of this region has
+# been like Vancouver.
# Dawson Creek uses MST. Much of east BC is like Edmonton.
# Matthews and Vincent (1998) write that Creston is like Dawson Creek.
@@ -1328,11 +1466,11 @@ Rule Vanc 1945 only - Sep 30 2:00 0 S
Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D
Rule Vanc 1946 only - Oct 13 2:00 0 S
Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S
-Rule Vanc 1962 max - Oct lastSun 2:00 0 S
-Rule Vanc 1987 max - Apr Sun>=1 2:00 1:00 D
+Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Vancouver -8:12:28 - LMT 1884
- -8:00 Vanc P%sT
+ -8:00 Vanc P%sT 1987
+ -8:00 Canada P%sT
Zone America/Dawson_Creek -8:00:56 - LMT 1884
-8:00 Canada P%sT 1947
-8:00 Vanc P%sT 1972 Aug 30 2:00
@@ -1341,7 +1479,7 @@ Zone America/Dawson_Creek -8:00:56 - LMT 1884
# Northwest Territories, Nunavut, Yukon
-# From Paul Eggert (1999-10-29):
+# From Paul Eggert (2006-03-22):
# Dawson switched to PST in 1973. Inuvik switched to MST in 1979.
# Mathew Englander (1996-10-07) gives the following refs:
# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68,
@@ -1350,7 +1488,8 @@ Zone America/Dawson_Creek -8:00:56 - LMT 1884
# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00.
# * O.I.C. 1980/02 established DST.
# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00.
-# Shanks says Yukon's 1973-10-28 switch was at 2:00; go with Englander.
+# Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go
+# with Englander.
# From Rives McDow (1999-09-04):
# Nunavut ... moved ... to incorporate the whole territory into one time zone.
@@ -1458,6 +1597,10 @@ Zone America/Dawson_Creek -8:00:56 - LMT 1884
# From Paul Eggert (2005-07-26):
# For lack of better information, assume that Southampton Island observed
# daylight saving only during wartime.
+#
+# From Chris Walton (2006-04-25):
+# Daylight saving time will be extended by four weeks starting in 2007....
+# http://www.cbc.ca/north/story/nor-nwt-time-change.html
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule NT_YK 1918 only - Apr 14 2:00 1:00 D
@@ -1470,8 +1613,8 @@ Rule NT_YK 1945 only - Sep 30 2:00 0 S
Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD
Rule NT_YK 1965 only - Oct lastSun 2:00 0 S
Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D
-Rule NT_YK 1980 max - Oct lastSun 2:00 0 S
-Rule NT_YK 1987 max - Apr Sun>=1 2:00 1:00 D
+Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S
+Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Pangnirtung -4:22:56 - LMT 1884
-4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00
@@ -1496,16 +1639,20 @@ Zone America/Cambridge_Bay -7:00:20 - LMT 1884
-6:00 - CST 2001 Apr 1 3:00
-7:00 Canada M%sT
Zone America/Yellowknife -7:37:24 - LMT 1884
- -7:00 NT_YK M%sT
+ -7:00 NT_YK M%sT 1980
+ -7:00 Canada M%sT
Zone America/Inuvik -8:54:00 - LMT 1884
-8:00 NT_YK P%sT 1979 Apr lastSun 2:00
- -7:00 NT_YK M%sT
+ -7:00 NT_YK M%sT 1980
+ -7:00 Canada M%sT
Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20
-9:00 NT_YK Y%sT 1966 Jul 1 2:00
- -8:00 NT_YK P%sT
+ -8:00 NT_YK P%sT 1980
+ -8:00 Canada P%sT
Zone America/Dawson -9:17:40 - LMT 1900 Aug 20
-9:00 NT_YK Y%sT 1973 Oct 28 0:00
- -8:00 NT_YK P%sT
+ -8:00 NT_YK P%sT 1980
+ -8:00 Canada P%sT
###############################################################################
@@ -1519,16 +1666,12 @@ Zone America/Dawson -9:17:40 - LMT 1900 Aug 20
# history of Mexican local time (in Spanish)
# </a>.
#
-# Here are the discrepancies between Shanks and the MLoC.
+# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC.
# (In all cases we go with the MLoC.)
-# Shanks reports that Baja was at -8:00 in 1922/1923.
-# Shanks says the 1930 transition in Baja was 1930-11-16.
-# Shanks reports no DST during summer 1931.
-# Shanks reports a transition at 1932-03-30 23:00, not 1932-04-01.
-# Shanks does not report transitions for Baja in 1945 or 1948.
-# Shanks reports southern Mexico transitions on 1981-12-01, not 12-23.
-# Shanks says Quintana Roo switched to -6:00 on 1982-12-02, and to -5:00
-# on 1997-10-26 at 02:00.
+# S&P report that Baja was at -8:00 in 1922/1923.
+# S&P say the 1930 transition in Baja was 1930-11-16.
+# S&P report no DST during summer 1931.
+# S&P report a transition at 1932-03-30 23:00, not 1932-04-01.
# From Gwillim Law (2001-02-20):
# There are some other discrepancies between the Decrees page and the
@@ -1536,10 +1679,6 @@ 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 Paul Eggert (2000-07-26):
-# Shanks gives 1942-04-01 instead of 1942-04-24, and omits the 1981
-# and 1988 DST experiments. Go with spin.com.mx.
-
# From Alan Perry (1996-02-15):
# A guy from our Mexico subsidiary finally found the Presidential Decree
# outlining the timezone changes in Mexico.
@@ -1739,7 +1878,8 @@ Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56
-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 Nov 12
+ -8:00 1:00 PWT 1945 Aug 14 23:00u
+ -8:00 1:00 PPT 1945 Nov 12 # Peace
-8:00 - PST 1948 Apr 5
-8:00 1:00 PDT 1949 Jan 14
-8:00 - PST 1954
@@ -1749,12 +1889,13 @@ Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56
-8:00 Mexico P%sT 2001
-8:00 US P%sT 2002 Feb 20
-8:00 Mexico P%sT
-# From Paul Eggert (2001-03-05):
+# From Paul Eggert (2006-03-22):
# Formerly there was an America/Ensenada zone, which differed from
# America/Tijuana only in that it did not observe DST from 1976
-# through 1995. This was as per Shanks. However, Guy Harris reports
+# through 1995. This was as per Shanks (1999). But Shanks & Pottenger say
+# Ensenada did not observe DST from 1948 through 1975. Guy Harris reports
# that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and
-# Tijuana observe DST," which contradicts Shanks but does imply that
+# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that
# DST-observance was a town-by-town matter back then. This concerns
# data after 1970 so most likely there should be at least one Zone
# other than America/Tijuana for Baja, but it's not clear yet what its
@@ -1798,7 +1939,7 @@ Zone America/Barbados -3:58:28 - LMT 1924 # Bridgetown
-4:00 Barb A%sT
# Belize
-# Whitman entirely disagrees with Shanks; go with Shanks.
+# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger.
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD
Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S
@@ -1827,7 +1968,8 @@ Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown
Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D
Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S
Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D
-# IATA SSIM (1991-09) says the following was at 1:00; go with Shanks.
+# IATA SSIM (1991-09) says the following was at 1:00;
+# go with Shanks & Pottenger.
Rule CR 1991 only - Jul 1 0:00 0 S
Rule CR 1992 only - Mar 15 0:00 0 S
# There are too many San Joses elsewhere, so we'll use `Costa Rica'.
@@ -1853,12 +1995,12 @@ Zone America/Costa_Rica -5:36:20 - LMT 1890 # San Jose
# From Evert van der Veer via Steffen Thorsen (2004-10-28):
# Cuba is not going back to standard time this year.
-# From Paul Eggert (2004-10-28):
+# From Paul Eggert (2006-03-22):
# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html
# says that it's due to a problem at the Antonio Guiteras
# thermoelectric plant, and says "This October there will be no return
# to normal hours (after daylight saving time)".
-# For now, let's assume that it's a one-year temporary measure.
+# For now, let's assume that it's a temporary measure.
# From Carlos A. Carnero Delgado (2005-11-12):
# This year (just like in 2004-2005) there's no change in time zone
@@ -1943,6 +2085,16 @@ Zone America/Santo_Domingo -4:39:36 - LMT 1890
-4:00 - AST
# El Salvador
+
+# From Paul Eggert (2006-05-05):
+# worldtimezone.com reports a 2006-05-02 Spanish-language AP article
+# saying Honduras will start using DST midnight Saturday, effective 4
+# months until September, and a 2006-05-03 NACION article saying El
+# Salvador will follow suit. However, ignore this for now, because:
+# From Jesper Norgaard Welen (2005-05-05):
+# Change of DST perhaps postponed in El Salvador:
+# http://www.laprensagrafica.com/lodeldia/883.asp
+
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D
Rule Salv 1987 1988 - Sep lastSun 0:00 0 S
@@ -1963,6 +2115,14 @@ Zone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe a Pitre
-4:00 - AST
# Guatemala
+#
+# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen:
+# Diario Co Latino, at
+# http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079,
+# says in an article dated 2006-04-19 that the Guatemalan government had
+# decided on that date to advance official time by 60 minutes, to lessen the
+# impact of the elevated cost of oil.... Daylight saving time will last from
+# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified).
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Guat 1973 only - Nov 25 0:00 1:00 D
Rule Guat 1974 only - Feb 24 0:00 0 S
@@ -1970,6 +2130,8 @@ Rule Guat 1983 only - May 21 0:00 1:00 D
Rule Guat 1983 only - Sep 22 0:00 0 S
Rule Guat 1991 only - Mar 23 0:00 1:00 D
Rule Guat 1991 only - Sep 7 0:00 0 S
+Rule Guat 2006 only - Apr 30 0:00 1:00 D
+Rule Guat 2006 only - Oct 1 0:00 0 S
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5
-6:00 Guat C%sT
@@ -1994,26 +2156,53 @@ Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5
# October 2005.
#
# "Port-au-Prince, March 31, 2005"
+#
+# From Steffen Thorsen (2006-04-04):
+# I have been informed by users that Haiti observes DST this year like
+# last year, so the current "only" rule for 2005 might be changed to a
+# "max" rule or to last until 2006. (Who knows if they will observe DST
+# next year or if they will extend their DST like US/Canada next year).
+#
+# I have found this article about it (in French):
+# http://www.haitipressnetwork.com/news.cfm?articleID=7612
+#
+# The reason seems to be an energy crisis.
+
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Haiti 1983 only - May 8 0:00 1:00 D
Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D
Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S
-# Shanks says AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. Go with IATA.
+# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s.
+# Go with IATA.
Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D
Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S
-Rule Haiti 2005 only - Apr Sun>=1 0:00 1:00 D
-Rule Haiti 2005 only - Oct lastSun 0:00 0 S
+Rule Haiti 2005 max - Apr Sun>=1 0:00 1:00 D
+Rule Haiti 2005 max - Oct lastSun 0:00 0 S
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Port-au-Prince -4:49:20 - LMT 1890
-4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT
-5:00 Haiti E%sT
# Honduras
-# Shanks says 1921 Jan 1; go with Whitman's more precise Apr 1.
+# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1.
+
+# From Paul Eggert (2006-05-05):
+# worldtimezone.com reports a 2006-05-02 Spanish-language AP article
+# saying Honduras will start using DST midnight Saturday, effective 4
+# months until September. La Tribuna reported today
+# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president
+# of Honduras, refused to back down on this. For lack of better info,
+# assume they'll use the same end-of-DST rules as in 1987 and 1988.
+
+# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
+Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D
+Rule Hond 1987 1988 - Sep lastSun 0:00 0 S
+Rule Hond 2006 only - May Sun>=1 0:00 1:00 D
+Rule Hond 2006 only - Sep lastSun 0:00 0 S
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr
- -6:00 Salv C%sT
+ -6:00 Hond C%sT
#
# Great Swan I ceded by US to Honduras in 1972
@@ -2025,7 +2214,7 @@ Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr
# From U. S. Naval Observatory (1989-01-19):
# JAMAICA 5 H BEHIND UTC
-# From Shanks:
+# From Shanks & Pottenger:
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Jamaica -5:07:12 - LMT 1890 # Kingston
-5:07:12 - KMT 1912 Feb # Kingston Mean Time
@@ -2042,18 +2231,16 @@ Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France
-4:00 - AST
# Montserrat
-# From Paul Eggert (1997-08-31):
-# Recent volcanic eruptions have forced evacuation of Plymouth, the capital.
-# Luckily, Olveston, the current de facto capital, has the same longitude.
+# From Paul Eggert (2006-03-22):
+# In 1995 volcanic eruptions forced evacuation of Plymouth, the capital.
+# world.gazetteer.com says Cork Hill is the most populous location now.
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
-Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Olveston
+Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Cork Hill
-4:00 - AST
# Nicaragua
#
-# From Steffen Thorsen (1998-12-29):
-# Nicaragua seems to be back at -6:00 but I have not been able to find when
-# they changed from -5:00.
+# This uses Shanks & Pottenger for times before 2005.
#
# From Steffen Thorsen (2005-04-12):
# I've got reports from 8 different people that Nicaragua just started
@@ -2067,8 +2254,7 @@ Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Olveston
#
# From Paul Eggert (2005-05-01):
# The decree doesn't say anything about daylight saving, but for now let's
-# assume that it is daylight saving and that they'll switch back on the
-# 3rd Sunday in September.
+# assume that it is daylight saving....
#
# From Gwillim Law (2005-04-21):
# The Associated Press story on the time change, which can be found at
@@ -2086,20 +2272,28 @@ Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Olveston
# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm
# (2005-09-26)
#
+# From Jesper Norgaard Welen (2006-05-05):
+# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410
+# (my informal translation)
+# By order of the president of the republic, Enrique Bolanos, Nicaragua
+# advanced by sixty minutes their official time, yesterday at 2 in the
+# morning, and will stay that way until 30.th. of september.
+#
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D
Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S
-Rule Nic 1992 only - Jan 1 4:00 1:00 D
-Rule Nic 1992 only - Sep 24 0:00 0 S
Rule Nic 2005 only - Apr 10 0:00 1:00 D
-Rule Nic 2005 only - Oct 2 0:00 0 S
+Rule Nic 2005 2006 - Oct Sun>=1 0:00 0 S
+Rule Nic 2006 only - Apr 30 2:00 1:00 D
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Managua -5:45:08 - LMT 1890
-5:45:12 - MMT 1934 Jun 23 # Managua Mean Time?
-6:00 - CST 1973 May
-5:00 - EST 1975 Feb 16
- -6:00 Nic C%sT 1993 Jan 1 4:00
- -5:00 - EST 1998 Dec
+ -6:00 Nic C%sT 1992 Jan 1 4:00
+ -5:00 - EST 1992 Sep 24
+ -6:00 - CST 1993
+ -5:00 - EST 1997
-6:00 Nic C%sT
# Panama
@@ -2113,7 +2307,7 @@ Zone America/Panama -5:18:08 - LMT 1890
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan
-4:00 - AST 1942 May 3
- -4:00 1:00 AWT 1945 Sep 30 2:00
+ -4:00 US A%sT 1946
-4:00 - AST
# St Kitts-Nevis
@@ -2142,8 +2336,8 @@ Zone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown
-4:00 - AST
# Turks and Caicos
-# From Paul Eggert (1998-08-06):
-# Shanks says they use US DST rules, but IATA SSIM (1991/1998)
+# From Paul Eggert (2006-03-22):
+# Shanks & Pottenger say they use US DST rules, but IATA SSIM (1991/1998)
# says they switch at midnight. Go with IATA SSIM.
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule TC 1979 1986 - Apr lastSun 0:00 1:00 D