From bd58b55bbb83856bf29a0252c8926699b7802f02 Mon Sep 17 00:00:00 2001 From: wollman Date: Fri, 6 Apr 2001 16:46:52 +0000 Subject: Merge tzdata2001b from vendor branch. --- share/zoneinfo/northamerica | 331 +++++++++++++++++++++++++++++++++----------- 1 file changed, 247 insertions(+), 84 deletions(-) (limited to 'share/zoneinfo/northamerica') diff --git a/share/zoneinfo/northamerica b/share/zoneinfo/northamerica index 383f53b..c4134ea 100644 --- a/share/zoneinfo/northamerica +++ b/share/zoneinfo/northamerica @@ -1,4 +1,4 @@ -# @(#)northamerica 7.53 +# @(#)northamerica 7.58 # also includes Central America and the Caribbean # $FreeBSD$ @@ -33,9 +33,10 @@ # Make sure you have the errata sheet; the book is somewhat useless without it. # It is the source for the US and Puerto Rico entries below. -# From Paul Eggert (1996-06-12): +# From Paul Eggert (2001-03-06): # Daylight Saving Time was first suggested as a joke by Benjamin Franklin -# in his whimsical essay ``Turkey vs Eagle, McCauley is my Beagle'' (1784). +# in his whimsical essay ``An Economical Project for Diminishing the Cost +# of Light'' published in the Journal de Paris (1784-04-26). # Not everyone is happy with the results: # # I don't really care how time is reckoned so long as there is some @@ -50,6 +51,16 @@ # them healthy, wealthy and wise in spite of themselves. # # -- Robertson Davies, The Diary of Samuel Marchbanks (1947), XIX, Sunday +# +# For more about the first ten years of DST in the United States, see +# Robert Garland's +# Ten years of daylight saving from the Pittsburgh standpoint +# (Carnegie Library of Pittsburgh, 1927). +# +# Shanks says that DST was called "War Time" in the US in 1918 and 1919. +# However, DST was imposed by the Standard Time Act of 1918, which +# was the first nationwide legal time standard, and apparently +# time was just called "Standard Time" or "Daylight Saving Time". # From Arthur David Olson: # US Daylight Saving Time ended on the last Sunday of *October* in 1974. @@ -79,14 +90,8 @@ # of surrender, all of whom interrupting the bells of Big Ben in # London which were to precede Mr. Atlee's speech. -# From Paul Eggert (2000-10-02): -# Shanks says that DST was called "War Time" in the US in 1919. -# In the light of the above, this seems suspect; -# but we have no better authority yet. - - # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -Rule US 1918 1919 - Mar lastSun 2:00 1:00 W # War +Rule US 1918 1919 - Mar lastSun 2:00 1:00 D Rule US 1918 1919 - Oct lastSun 2:00 0 S Rule US 1942 only - Feb 9 2:00 1:00 W # War Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace @@ -176,6 +181,19 @@ Rule US 1987 max - Apr Sun>=1 2:00 1:00 D # From Paul Eggert (1995-12-19): # Shanks uses 1983-10-30, not 1983-11-30, for the 1983 transitions. # Go with Shanks. +# +# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: +# 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 Ryan Alessi of the Thousand Oaks Star (2001-02-15) via Rives McDow: +# Brad Sherman, D-Sherman Oaks, introduced a bill in Congress on +# Wednesday that could have California operating on Denver time as +# early as this summer.... The options include keeping +# daylight-saving time all year long, or setting clocks back two hours +# -- instead of just one -- during the existing daylight-saving time. + # US Eastern time, represented by New York @@ -228,7 +246,8 @@ Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:00 # # Colorado, southern Idaho, far western Kansas, Montana, western # Nebraska, New Mexico, southwestern North Dakota, far eastern Oregon, -# western South Dakota, far western Texas, Utah, Wyoming +# western South Dakota, far western Texas (El Paso County, Hudspeth County, +# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming # # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D @@ -263,40 +282,47 @@ Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:00 # Alaska # AK%sT is the modern abbreviation for -9:00 per USNO. # -# From Paul Eggert (1995-12-19): +# From Paul Eggert (2001-04-01): # Howse writes that Alaska switched from the Julian to the Gregorian calendar, # and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. -# This was on 1867-10-18. We omit this transition, since we can't represent -# changes from Julian to Gregorian. +# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, +# also a Friday. Include only the time zone part of this transition, +# ignoring the switch from Julian to Gregorian, since we can't represent +# the Julian calendar. # # Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Juneau -8:57:41 - LMT 1900 Aug 20 12:00 +Zone America/Juneau 15:02:19 - LMT 1867 Oct 18 + -8:57:41 - LMT 1900 Aug 20 12:00 -8:00 - PST 1942 -8:00 US P%sT 1946 -8:00 - PST 1969 -8:00 US P%sT 1983 Oct 30 2:00 -9:00 US AK%sT -Zone America/Yakutat -9:18:55 - LMT 1900 Aug 20 12:00 +Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18 + -9:18:55 - LMT 1900 Aug 20 12:00 -9:00 - YST 1942 -9:00 US Y%sT 1946 -9:00 - YST 1969 -9:00 US Y%sT 1983 Oct 30 2:00 -9:00 US AK%sT -Zone America/Anchorage -9:59:36 - LMT 1900 Aug 20 12:00 +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 - CAT 1967 Apr -10:00 - AHST 1969 -10:00 US AH%sT 1983 Oct 30 2:00 -9:00 US AK%sT -Zone America/Nome -11:01:38 - LMT 1900 Aug 20 12:00 +Zone America/Nome 12:58:21 - LMT 1867 Oct 18 + -11:01:38 - LMT 1900 Aug 20 12:00 -11:00 - NST 1942 -11:00 US N%sT 1946 -11:00 - NST 1967 Apr -11:00 - BST 1969 -11:00 US B%sT 1983 Oct 30 2:00 -9:00 US AK%sT -Zone America/Adak -11:46:38 - LMT 1900 Aug 20 12:00 +Zone America/Adak 12:13:21 - LMT 1867 Oct 18 + -11:46:38 - LMT 1900 Aug 20 12:00 -11:00 - NST 1942 -11:00 US N%sT 1946 -11:00 - NST 1967 Apr @@ -378,6 +404,13 @@ Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:00 # So we reluctantly put them all in a subdirectory `America/Indiana'. # # Most of EST-only Indiana last observed DST in 1970. + +# From Paul Eggert (2001-03-06), following a tip by Markus Kuhn: +# Pam Belluck reported in the New York Times (2001-01-31) that the +# Indiana Legislature is considering a bill to adopt DST statewide. +# Her article mentioned Vevay, whose post office observes a different +# time zone than Danner's Hardware across the street. + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S @@ -478,10 +511,8 @@ Link America/Louisville America/Kentucky/Louisville # From Rich Wales (2000-08-29): # After prolonged debate, and despite continuing deep differences of opinion, # Wayne County (central Kentucky) is switching from Central (-0600) to Eastern -# (-0500) time. They won't "fall back" this year. See: -# -# Sara Shipley, the difference an hour makes (2000-08-29 15:33 -0400) -# +# (-0500) time. They won't "fall back" this year. See Sara Shipley, +# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:00 -6:00 US C%sT 1946 -6:00 - CST 1968 @@ -525,6 +556,11 @@ Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:00 # # This story is too entertaining to be false, so go with Howse over Shanks. # +# From Paul Eggert (2001-03-06): +# Garland (1927) writes ``Cleveland and Detroit advanced their clocks +# one hour in 1914.'' This change is not in Shanks. We have no more +# info, so omit this for now. +# # Most of Michigan observed DST from 1973 on, but was a bit late in 1975. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D @@ -650,7 +686,7 @@ Link Pacific/Honolulu HST # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Canada 1918 only - Apr 14 2:00 1:00 D Rule Canada 1918 only - Oct 31 2:00 0 S -Rule Canada 1942 only - Feb 9 2:00 1:00 D +Rule Canada 1942 only - Feb 9 2:00 1:00 W Rule Canada 1945 only - Sep 30 2:00 0 S Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D Rule Canada 1974 max - Oct lastSun 2:00 0 S @@ -679,13 +715,13 @@ Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S Rule StJohns 1936 1941 - May Sun>=8 0:00 1:00 D Rule StJohns 1936 1941 - Oct Sun>=1 0:00 0 S # Shanks gives 1942 May 11 - 1945 Sep 30; go with Whitman. -Rule StJohns 1942 only - Mar 1 0:00 1:00 D +Rule StJohns 1942 only - Mar 1 0:00 1:00 W Rule StJohns 1942 only - Dec 31 0:00 0 S -Rule StJohns 1943 only - May 30 0:00 1:00 D +Rule StJohns 1943 only - May 30 0:00 1:00 W Rule StJohns 1943 only - Sep 5 0:00 0 S -Rule StJohns 1944 only - Jul 10 0:00 1:00 D +Rule StJohns 1944 only - Jul 10 0:00 1:00 W Rule StJohns 1944 only - Sep 2 0:00 0 S -Rule StJohns 1945 only - Jan 1 0:00 1:00 D +Rule StJohns 1945 only - Jan 1 0:00 1:00 W Rule StJohns 1945 only - Oct 7 2:00 0 S # 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. @@ -769,7 +805,7 @@ 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 1942 only - Feb 9 2:00 1:00 D +Rule Halifax 1942 only - Feb 9 2:00 1:00 W Rule Halifax 1945 1959 - Sep lastSun 2:00 0 S Rule Halifax 1946 1959 - Apr lastSun 2:00 1:00 D Rule Halifax 1962 1986 - Apr lastSun 2:00 1:00 D @@ -871,7 +907,7 @@ Rule Winn 1918 only - Apr 14 2:00 1:00 D Rule Winn 1918 only - Oct 31 2:00 0 S Rule Winn 1937 only - May 16 2:00 1:00 D Rule Winn 1937 only - Sep 26 2:00 0 S -Rule Winn 1942 only - Feb 9 2:00 1:00 D +Rule Winn 1942 only - Feb 9 2:00 1:00 W Rule Winn 1945 only - Sep lastSun 2:00 0 S Rule Winn 1946 only - May 12 2:00 1:00 D Rule Winn 1946 only - Oct 13 2:00 0 S @@ -941,7 +977,7 @@ Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D Rule Regina 1937 only - Oct Sun>=8 0:00 0 S Rule Regina 1938 only - Oct Sun>=1 0:00 0 S Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S -Rule Regina 1942 only - Feb 9 2:00 1:00 D +Rule Regina 1942 only - Feb 9 2:00 1:00 W Rule Regina 1945 only - Sep lastSun 2:00 0 S Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D Rule Regina 1946 only - Oct Sun>=8 2:00 0 S @@ -974,7 +1010,7 @@ Rule Edm 1919 only - May 27 2:00 0 S Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D Rule Edm 1920 only - Oct lastSun 2:00 0 S Rule Edm 1921 1923 - Sep lastSun 2:00 0 S -Rule Edm 1942 only - Feb 9 2:00 1:00 D +Rule Edm 1942 only - Feb 9 2:00 1:00 W Rule Edm 1945 only - Sep lastSun 2:00 0 S Rule Edm 1947 only - Apr lastSun 2:00 1:00 D Rule Edm 1947 only - Sep lastSun 2:00 0 S @@ -1000,7 +1036,7 @@ Zone America/Edmonton -7:33:52 - LMT 1906 Sep # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Vanc 1918 only - Apr 14 2:00 1:00 D Rule Vanc 1918 only - Oct 31 2:00 0 S -Rule Vanc 1942 only - Feb 9 2:00 1:00 D +Rule Vanc 1942 only - Feb 9 2:00 1:00 W 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 @@ -1082,7 +1118,7 @@ Zone America/Dawson_Creek -8:00:56 - LMT 1884 # From Paul Eggert (2000-10-02): # Matthews and Vincent (1998) say the following, but we lack histories # for these potential new Zones. -# +# # The Canadian Forces station at Alert uses Eastern Time while the # handful of residents at the Eureka weather station [in the Central # zone] skip daylight savings. Baffin Island, which is crossed by the @@ -1091,12 +1127,42 @@ Zone America/Dawson_Creek -8:00:56 - LMT 1884 # Central Time and Southampton Island [in the Central zone] is not # required to use daylight savings. +# From +# +# Nunavut now has two time zones +# (2000-11-10): +# The Nunavut government would allow its employees in Kugluktuk and +# Cambridge Bay to operate on central time year-round, putting them +# one hour behind the rest of Nunavut for six months during the winter. +# At the end of October the two communities had rebelled against +# Nunavut's unified time zone, refusing to shift to eastern time with +# the rest of the territory for the winter. Cambridge Bay remained on +# central time, while Kugluktuk, even farther west, reverted to +# mountain time, which they had used before the advent of Nunavut's +# unified time zone in 1999. +# +# From Rives McDow (2001-01-20), quoting the Nunavut government: +# The preceding decision came into effect at midnight, Saturday Nov 4, 2000. + +# From Paul Eggert (2000-12-04): +# Let's just keep track of the official times for now. + +# From Rives McDow (2001-03-07): +# The premier of Nunavut has issued a ministerial statement advising +# that effective 2001-04-01, the territory of Nunavut will revert +# back to three time zones (mountain, central, and eastern). Of the +# cities in Nunavut, Coral Harbor is the only one that I know of that +# has said it will not observe dst, staying on EST year round. I'm +# checking for more info, and will get back to you if I come up with +# more. +# [Also see (2001-03-09).] + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule NT_YK 1918 only - Apr 14 2:00 1:00 D Rule NT_YK 1918 only - Oct 27 2:00 0 S Rule NT_YK 1919 only - May 25 2:00 1:00 D Rule NT_YK 1919 only - Nov 1 0:00 0 S -Rule NT_YK 1942 only - Feb 9 2:00 1:00 D +Rule NT_YK 1942 only - Feb 9 2:00 1:00 W 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 @@ -1107,15 +1173,22 @@ Rule NT_YK 1987 max - Apr Sun>=1 2:00 1:00 D Zone America/Pangnirtung -4:22:56 - LMT 1884 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 -5:00 Canada E%sT 1999 Oct 31 2:00 - -6:00 Canada C%sT + -6:00 Canada C%sT 2000 Oct 29 2:00 + -5:00 Canada E%sT Zone America/Iqaluit -4:33:52 - LMT 1884 # Frobisher Bay before 1987 -5:00 NT_YK E%sT 1999 Oct 31 2:00 - -6:00 Canada C%sT + -6:00 Canada C%sT 2000 Oct 29 2:00 + -5:00 Canada E%sT Zone America/Rankin_Inlet -6:08:40 - LMT 1884 - -6:00 NT_YK C%sT + -6:00 NT_YK C%sT 2000 Oct 29 2:00 + -5:00 - EST 2001 Apr 1 3:00 + -6:00 Canada C%sT Zone America/Cambridge_Bay -7:00:20 - LMT 1884 -7:00 NT_YK M%sT 1999 Oct 31 2:00 - -6:00 Canada C%sT + -6:00 Canada C%sT 2000 Oct 29 2:00 + -5:00 - EST 2000 Nov 5 0:00 + -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 Zone America/Inuvik -8:54:00 - LMT 1884 @@ -1133,31 +1206,29 @@ Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 # Mexico -# Gwillim Law reports this source for daylight saving time in Mexico: -# -# Daylight saving time * SPIN-Internet (in Spanish) -# -# Law (2000-03-09) translates it as follows: -# -# Standard time effective in Mexico takes its origin in the -# presidential decree of April 24, 1942. The time of the 120th -# meridian applies to the state of Baja California; of the 105th -# meridian to the states of Baja California Sur, Sonora, Sinaloa, and -# Nayarit; and the time of the 90th meridian to the rest of the -# country. -# -# In the country, there have been several attempts made to adapt -# standard time with the object of arriving at a better use of -# daylight for social and economic activities. In December, 1981 a -# permanent time zone was decreed for the states of Campeche, Yucatan, -# and Quintana Roo, displacing them from the 90th to the 75th -# meridian. This disposition was annulled on December 2, 1982. -# -# In 1988 a Summer Time was established for the states of Tamaulipas, -# Nuevo Leon, Coahuila, and Durango, which meant that from the first -# Sunday in April to the last [Sunday] of October those states -# displaced their time from the 90th to the 75th meridian. That -# disposition lasted for one year. +# From Paul Eggert (2001-03-05): +# The Investigation and Analysis Service of the +# Mexican Library of Congress (MLoC) has published a +# +# history of Mexican local time (in Spanish) +# . +# +# Here are the discrepancies between Shanks 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 1032-03-30 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. + +# From Gwillim Law (2001-02-20): +# There are some other discrepancies between the Decrees page and the +# tz database. I think they can best be explained by supposing that +# 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 @@ -1207,36 +1278,89 @@ Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 # savings time so as to stay on the same time zone as the southern part of # Arizona year round. +# From Jesper Norgaard, translating +# (2001-01-17): +# In Oaxaca, the 55.000 teachers from the Section 22 of the National +# Syndicate of Education Workers, refuse to apply daylight saving each +# year, so that the more than 10,000 schools work at normal hour the +# whole year. + +# From Gwillim Law (2001-01-19): +# ... says +# (translated):... +# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced +# that Summer Time will be reduced from seven to five months, starting +# this year.... +# +# [translated], says "summer time will ... take effect on the first Sunday +# in May, and end on the last Sunday of September. + +# From Arthur David Olson (2001-01-25): +# The 2001-01-24 traditional Washington Post contained the page one +# story "Timely Issue Divides Mexicans."... +# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html +# ... Mexico City Mayor Lopez Obrador "...is threatening to keep +# Mexico City and its 20 million residents on a different time than +# the rest of the country..." In particular, Lopez Obrador would abolish +# observation of Daylight Saving Time. + +# +# Official statute published by the Energy Department +# (2001-02-01) shows Baja and Chihauhua as still using US DST rules, +# and Sonora with no DST. This was reported by Jesper Norgaard (2001-02-03). + +# From Paul Eggert (2001-03-03): +# +# +# James F. Smith writes in today's LA Times +# +# * Sonora will continue to observe standard time. +# * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that +# the Federal District will not adopt DST. +# * 4 of 16 district leaders announced they'll ignore the decree. +# * The decree does not affect federal-controlled facilities including +# the airport, banks, hospitals, and schools. +# +# For now we'll assume that the Federal District will bow to federal rules. + +# From Jesper Norgaard (2001-04-01): +# I found some references to the Mexican application of daylight +# saving, which modifies what I had already sent you, stating earlier +# that a number of northern Mexican states would go on daylight +# saving. The modification reverts this to only cover Baja California +# (Norte), while all other states (except Sonora, who has no daylight +# saving all year) will follow the original decree of president +# Vicente Fox, starting daylight saving May 6, 2001 and ending +# September 30, 2001. +# References: "Diario de Monterrey" +# Palabra (2001-03-31) + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule Mexico 1939 only - Feb 5 0:00 1:00 D Rule Mexico 1939 only - Jun 25 0:00 0 S Rule Mexico 1940 only - Dec 9 0:00 1:00 D Rule Mexico 1941 only - Apr 1 0:00 0 S -Rule Mexico 1943 only - Dec 16 0:00 1:00 D +Rule Mexico 1943 only - Dec 16 0:00 1:00 W Rule Mexico 1944 only - May 1 0:00 0 S Rule Mexico 1950 only - Feb 12 0:00 1:00 D Rule Mexico 1950 only - Jul 30 0:00 0 S -Rule Mexico 1996 max - Apr Sun>=1 2:00 1:00 D -Rule Mexico 1996 max - Oct lastSun 2:00 0 S -# -Rule BajaN 1954 1961 - Apr lastSun 2:00 1:00 D -Rule BajaN 1954 1961 - Sep lastSun 2:00 0 S +Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D +Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S +Rule Mexico 2001 max - May Sun>=1 2:00 1:00 D +Rule Mexico 2001 max - Sep lastSun 2:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] # Quintana Roo Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 - -6:00 - CST 1981 Dec - -5:00 - EST 1982 Dec 2 - -6:00 - CST 1996 - -6:00 Mexico C%sT 1997 Oct lastSun 2:00 + -6:00 - CST 1981 Dec 23 -5:00 Mexico E%sT 1998 Aug 2 2:00 -6:00 Mexico C%sT # Campeche, Yucatan Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 - -6:00 - CST 1981 Dec + -6:00 - CST 1981 Dec 23 -5:00 - EST 1982 Dec 2 -6:00 Mexico C%sT # Coahuila, Durango, Nuevo Leon, Tamaulipas -Zone America/Monterrey -6:41:16 - LMT 1922 Jan 1 0:01:32 +Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 -6:00 - CST 1988 -6:00 US C%sT 1989 -6:00 Mexico C%sT @@ -1246,7 +1370,7 @@ Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 -6:00 - CST 1930 Nov 15 -7:00 - MST 1931 May 1 23:00 -6:00 - CST 1931 Oct - -7:00 - MST 1932 Mar 30 23:00 + -7:00 - MST 1932 Apr 1 -6:00 Mexico C%sT # Chihuahua Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 @@ -1254,7 +1378,7 @@ Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 -6:00 - CST 1930 Nov 15 -7:00 - MST 1931 May 1 23:00 -6:00 - CST 1931 Oct - -7:00 - MST 1932 Mar 30 23:00 + -7:00 - MST 1932 Apr 1 -6:00 - CST 1996 -6:00 Mexico C%sT 1998 -6:00 - CST 1998 Apr Sun>=1 3:00 @@ -1265,7 +1389,7 @@ Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 -6:00 - CST 1930 Nov 15 -7:00 - MST 1931 May 1 23:00 -6:00 - CST 1931 Oct - -7:00 - MST 1932 Mar 30 23:00 + -7:00 - MST 1932 Apr 1 -6:00 - CST 1942 Apr 24 -7:00 - MST 1949 Jan 14 -8:00 - PST 1970 @@ -1277,20 +1401,38 @@ Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 -6:00 - CST 1930 Nov 15 -7:00 - MST 1931 May 1 23:00 -6:00 - CST 1931 Oct - -7:00 - MST 1932 Mar 30 23:00 + -7:00 - MST 1932 Apr 1 -6:00 - CST 1942 Apr 24 -7:00 - MST 1949 Jan 14 -8:00 - PST 1970 -7:00 Mexico M%sT # Baja California Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 + -7:00 - MST 1924 -8:00 - PST 1927 Jun 10 23:00 - -7:00 - MST 1930 Nov 16 + -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 - -7:00 - MST 1949 Jan 14 - -8:00 BajaN P%sT 1976 + -8:00 1:00 PWT 1945 Nov 12 + -8:00 - PST 1948 Apr 5 + -8:00 1:00 PDT 1949 Jan 14 + -8:00 - PST 1954 + -8:00 CA P%sT 1961 + -8:00 - PST 1976 -8:00 US P%sT 1996 - -8:00 Mexico P%sT + -8:00 Mexico P%sT 2001 + -8:00 US P%sT +# From Paul Eggert (2001-03-05): +# 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 +# that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and +# Tijuana observe DST," which contradicts Shanks but does imply 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 +# name or contents should be. # # Revillagigedo Is # no information @@ -1425,6 +1567,25 @@ Zone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau -4:00 - AST # Dominican Republic + +# From Steffen Thorsen (2000-10-30): +# Enrique Morales reported to me that the Dominican Republic has changed the +# time zone to Eastern Standard Time as of Sunday 29 at 2 am.... +# http://www.listin.com.do/antes/261000/republica/princi.html + +# From Paul Eggert (2000-12-04): +# That URL (2000-10-26, in Spanish) says they planned to use US-style DST. + +# From Rives McDow (2000-12-01): +# Dominican Republic changed its mind and presidential decree on Tuesday, +# November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the +# Dominican Republic will be reverting to 8 hours from the International Date +# Line, and will not be using DST in the foreseeable future. The reason they +# decided to use DST was to be in synch with Puerto Rico, who was also going +# to implement DST. When Puerto Rico didn't implement DST, the president +# decided to revert. + + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule DR 1966 only - Oct 30 0:00 1:00 D Rule DR 1967 only - Feb 28 0:00 0 S @@ -1436,6 +1597,8 @@ Rule DR 1972 1974 - Jan 21 0:00 0 S Zone America/Santo_Domingo -4:39:36 - LMT 1890 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT -5:00 DR E%sT 1974 Oct 27 + -4:00 - AST 2000 Oct 29 02:00 + -5:00 US E%sT 2000 Dec 3 01:00 -4:00 - AST # El Salvador -- cgit v1.1