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Diffstat (limited to 'time/northamerica')
| -rw-r--r-- | time/northamerica | 953 |
1 files changed, 0 insertions, 953 deletions
diff --git a/time/northamerica b/time/northamerica deleted file mode 100644 index 40733fddc..000000000 --- a/time/northamerica +++ /dev/null @@ -1,953 +0,0 @@ -# @(#)northamerica 7.12 -# also includes Central America and the Caribbean - -# This data is by no means authoritative; if you think you know better, -# go ahead and edit the file (and please send any changes to -# tz@elsie.nci.nih.gov for general use in the future). - -# From Paul Eggert <eggert@twinsun.com> (August 17, 1994): -# A reliable and entertaining source about time zones is -# Derek Howse, Greenwich time and the discovery of the longitude, -# Oxford University Press (1980). - -############################################################################### - -# United States - -# From Arthur David Olson: -# US Daylight Saving Time ended on the last Sunday of *October* in 1974. -# See, for example, the front page of the Saturday, October 26, 1974 -# and Sunday, October 27, 1974 editions of the Washington Post. - -# From seismo!munnari!kre: -# I recall also being told by someone once that Canada didn't have -# the DST variations in 74/75 that the US did, but I am not nearly -# sure enough of this to add anything. - -# From Arthur David Olson: -# The above has been confirmed by Bob Devine; we'll go with it here. - -# From Arthur David Olson: -# Before the Uniform Time Act of 1966 took effect in 1967, observance of -# Daylight Saving Time in the US was by local option, except during wartime. - -# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -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 - Sep 30 2:00 0 S -Rule US 1967 max - Oct lastSun 2:00 0 S -Rule US 1967 1973 - Apr lastSun 2:00 1:00 D -Rule US 1974 only - Jan 6 2:00 1:00 D -Rule US 1975 only - Feb 23 2:00 1:00 D -Rule US 1976 1986 - Apr lastSun 2:00 1:00 D -Rule US 1987 max - Apr Sun>=1 2:00 1:00 D - -# From Bob Devine (January 28, 1988): -# ...Alaska (and Hawaii) had the timezone names changed in 1967. -# old new -# Pacific Standard Time(PST) -same- -# Yukon Standard Time(YST) -same- -# Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) -# Nome Standard Time (NT) Bering Standard Time (BST) -# -# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. -# The YST zone now covers nearly all of the state, AHST just part -# of the Aleutian islands. No DST. - -# From U. S. Naval Observatory (January 19, 1989): -# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON -# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 -# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON -# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 -# USA MOUNTAIN 7 H BEHIND UTC DENVER -# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 -# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO -# USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 -# USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) -# USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) -# USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W -# USA - " - 9 H BEHIND UTC APR 3 - OCT 30 -# USA HAWAII 10 H BEHIND UTC -# USA BERING 11 H BEHIND UTC SAMOA, MIDWAY - -# From Arthur David Olson (January 21, 1989): -# The above dates are for 1988. -# Note the "AKST" and "AKDT" abbreviations, the claim that there's -# no DST in Samoa, and the claim that there is DST in Alaska and the -# Aleutians. - -# From Arthur David Olson (February 13, 1988): -# Legal standard time zone names, from United States Code (1982 Edition and -# Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names -# up to April 1, 1967 (when most provisions of the Uniform Time Act of 1966 -# took effect), as explained in sections 263 and 261: -# (none) -# United States standard eastern time -# United States standard mountain time -# United States standard central time -# United States standard Pacific time -# (none) -# United States standard Alaska time -# (none) -# Next, names from April 1, 1967 until November 30, 1983 (the date for -# public law 98-181): -# Atlantic standard time -# eastern standard time -# central standard time -# mountain standard time -# Pacific standard time -# Yukon standard time -# Alaska-Hawaii standard time -# Bering standard time -# And after November 30, 1983: -# Atlantic standard time -# eastern standard time -# central standard time -# mountain standard time -# Pacific standard time -# Alaska standard time -# Hawaii-Aleutian standard time -# Samoa standard time -# The law doesn't give abbreviations. - -# From Paul Eggert <eggert@twinsun.com> (August 16, 1994): -# Howse writes that Alaska switched from the Julian to the Gregorian calendar, -# and from east-of-GMT to west-of-GMT days, in 1867 when the US purchased it -# from Russia. We don't have this data pinned down yet, though. - -# Easy stuff first--including Alaska, where we ignore history (since we -# can't tell if we should give Yukon time or Alaska-Hawaii time for "old" -# times). - -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/New_York -5:00 US E%sT -Zone America/Chicago -6:00 US C%sT -Zone America/Denver -7:00 US M%sT -Zone America/Los_Angeles -8:00 US P%sT -Zone America/Anchorage -9:00 US AK%sT - # AK%sT is the abbreviation per USNO - -# Mainland US areas that are always Standard as of 1986. - -Zone America/Fort_Wayne -5:00 US E%sT 1946 - -5:00 - EST # Always EST as of 1986 -# From Arthur David Olson (October 28, 1991): -# An article on page A3 of the Sunday, October 27, 1991 Washington Post -# notes that Starke County switched from Central time to Eastern time as of -# October 27, 1991. -Zone America/Knox_IN -6:00 US C%sT 1991 Oct 27 2:00 - -5:00 - EST # Always EST as of 1991 -Zone America/Phoenix -7:00 US M%sT 1946 - -7:00 - MST # Always MST as of 1986 - -# From Arthur David Olson (February 13, 1988): -# However. . .a writer from the Inter Tribal Council of Arizona, Inc., -# notes in private correspondence dated 12/28/87 that "Presently, only the -# Navajo Nation participates in the Daylight Saving Time policy, due to its -# large size and location in three states." (The "only" means that other -# tribal nations don't use DST.) - -Link America/Denver Navajo - -# From Bob Devine (January 28, 1988): -# Michigan didn't observe DST from 1968 to 1973. - -Zone America/Detroit -5:00 US E%sT 1968 - -5:00 - EST 1973 - -5:00 US E%sT - -# Samoa just changes names. No DST, per Naval Observatory. -# -# Howse writes that in 1879 the King of Samoa decided to change -# ``the date in his kingdom from the Antipodean to the American system, -# ordaining -- by a masterpiece of diplomatic flattery -- that -# the Fourth of July should be celebrated twice in that year.'' - -Zone Pacific/Samoa 12:37:12 - LMT 1879 Jul 5 - -11:22:48 - LMT 1911 - -11:30 - SST 1950 - -11:00 - NST 1967 Apr # N=Nome - -11:00 - BST 1983 Nov 30 # B=Bering - -11:00 - SST # S=Samoa - -Zone Pacific/Midway -11:49:28 - LMT 1901 - -11:00 - NST 1967 Apr # N=Nome - -11:00 - BST 1983 Nov 30 # B=Bering - -11:00 - SST # S=Samoa - -# Aleutian has a name change. DST, per Naval Observatory. - -Zone America/Atka -10:00 US AH%sT 1983 Nov 30 - -10:00 US HA%sT - -# From Arthur David Olson: -# And then there's Hawaii. -# DST was observed for one day in 1933; -# Standard time was change by half an hour in 1947; -# it's always standard as of 1986. - -Zone Pacific/Honolulu -10:30 US H%sT 1933 Apr 30 2:00 - -10:30 1:00 HDT 1933 May 1 2:00 - -10:30 US H%sT 1947 Jun 8 2:00 - -10:00 - HST - -# Navassa -# no information; probably like US/Eastern - - -# Old names, for S5 users - -# Link LINK-FROM LINK-TO -Link America/New_York EST5EDT -Link America/Chicago CST6CDT -Link America/Denver MST7MDT -Link America/Los_Angeles PST8PDT -Link America/Fort_Wayne EST -Link America/Phoenix MST -Link Pacific/Honolulu HST - -################################################################################ - - -# From Paul Eggert <eggert@twinsun.com> (November 18, 1993): -# A good source for time zone historical data outside the U.S. is -# Thomas G. Shanks, The International Atlas (3rd edition), -# San Diego: ACS Publications, Inc. (1991). -# Except where otherwise noted, it is the source for the data below. -# -# Another source occasionally used is Edward W. Whitman, World Time Differences, -# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), which -# I found in the UCLA library. -# -# I invented the abbreviation SPST for St Pierre Standard Time; SPDT likewise. -# Corrections are welcome! -# -# See the `europe' file for Greenland. -# -# See the `africa' file for Zone naming conventions. - - - -# Canada - -# Canada is reportedly lots easier than the US--leastways since 1951. -# I don't know what they did before then. -# 4.3BSD claims that it's perfectly regular. -# According to a posting in "comp.bugs.misc", "comp.unix.wizards", etc. -# on February 8, 1987, by Dave Sherman of the Law Society of Upper Canada, -# "...Canada (well, Ontario and at least some of the other provinces) are -# adopting the new daylight savings time rules...". We assume all of -# Canada is doing so. - -# From Bob Devine (January 28, 1988): -# All of Canada did have DST from your first rule except Saskatchewan. -# Which parts did not observe DST is hard to pinpoint but most of the -# province follows the rules. -# NOTE: those that didn't have DST for that rule, also -# probably did not have it for several years previous. - -# From U. S. Naval Observatory (January 19, 1989): -# CANADA NEW FDL 3.5H BEHIND UTC ST.JOHN'S -# CANADA NEW FDL 1.5H BEHIND UTC APR 3 - OCT 29 -# CANADA ATLANTIC 4 H BEHIND UTC HALIFAX -# CANADA ATLANTIC 3 H BEHIND UTC APR 3 - OCT 29 -# CANADA EASTERN 5 H BEHIND UTC TORONTO, MONTREAL, OTTAWA -# CANADA EASTERN 4 H BEHIND UTC APR 3 - OCT 29 -# CANADA CENTRAL 6 H BEHIND UTC REGINA, WINNIPEG -# CANADA CENTRAL 5 H BEHIND UTC APR 3 - OCT 29 -# CANADA MOUNTAIN 7 H BEHIND UTC CALGARY, EDMONTON -# CANADA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 29 -# CANADA PACIFIC 8 H BEHIND UTC VANCOUVER -# CANADA PACIFIC 7 H BEHIND UTC APR 3 - OCT 29 -# CANADA YUKON SAME AS PACIFIC DAWSON - -# From Arthur David Olson (January 21, 1989): -# April 3 fell on a Sunday in 1988; October 29 fell on a Sunday in 1989. Ahem. -# Note claim that there's double DST in Newfoundland and that Yukon should -# be same as Pacific. - -# From W. Jones (jones@skdad.usask.ca) (November 6, 1992): -# The. . .below is based on information I got from our law library, the -# provincial archives, and the provincial Community Services department. -# A precise history would require digging through newspaper archives, and -# since you didn't say what you wanted, I didn't bother. -# -# Saskatchewan is split by a time zone meridian (105W) and over the years -# the boundary became pretty ragged as communities near it reevaluated -# their affiliations in one direction or the other. In 1965 a provincial -# referendum favoured legislating common time practices. -# -# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of -# Saskatchewan 1978) was proclaimed, and established that the eastern -# part of Saskatchewan would use CST year round, that districts in -# northwest Saskatchewan would by default follow CST but could opt to -# follow Mountain Time rules (thus 1 hour difference in the winter and -# zero in the summer), and that districts in southwest Saskatchewan would -# by default follow MT but could opt to follow CST. -# -# It took a few years for the dust to settle (I know one story of a town -# on one time zone having its school in another, such that a mom had to -# serve her family lunch in two shifts), but presently it seems that only -# a few towns on the border with Alberta (e.g. Lloydminster) follow MT -# rules any more; all other districts appear to have used CST year round -# since sometime in the 1960s. -# -# Here's how I would summarize things. Establish a "Saskatchewan" CST -# time zone, and note that it officially exists as of 15 April 1966. Any -# current exceptions can put themselves in the "Mountain" zone, since -# those are the rules they follow. Any past exceptions can be forgotten, -# since that's what those who live here have done. - -# From Arthur David Olson (November 21, 1992): -# East-Saskatchewan kept to avoid problems for folks using that zone by name; -# plain Saskatchewan added. - -# From Alain LaBont<e'> <ALB@immedia.ca> (1994-11-14): -# I post here the time zone abbreviations standardized in Canada -# for both English and French in the CAN/CSA-Z234.4-89 standard.... -# -# UTC Standard time Daylight savings time -# offset French English French English -# -2:30 - - HAT NDT -# -3 - - HAA ADT -# -3:30 HNT NST - - -# -4 HNA AST HAE EDT -# -5 HNE EST HAC CDT -# -6 HNC CST HAR MDT -# -7 HNR MST HAP PDT -# -8 HNP PST HAY YDT -# -9 HNY YST - - -# -# HN: Heure Normale ST: Standard Time -# HA: Heure Avanc<e'>e DT: Daylight saving Time -# -# A: de l'Atlantique Atlantic -# C: du Centre Central -# E: de l'Est Eastern -# M: Mountain -# N: Newfoundland -# P: du Pacifique Pacific -# R: des Rocheuses -# T: de Terre-Neuve -# Y: du Yukon Yukon -# -# From Paul Eggert <eggert@twinsun.com> (1994-11-22): -# Alas, this sort of thing must be handled by localization software. - - - -# From Shanks (1991): -# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -Rule StJohns 1884 only - Jan 1 0:00 0 S -Rule StJohns 1917 1918 - Apr Sun>=8 2:00 1:00 D -Rule StJohns 1917 only - Sep 17 2:00 0 S -Rule StJohns 1918 only - Oct 31 2:00 0 S -# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks. -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. -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 Shanks gives May Mon>=9 and Oct Mon>=2; go with Whitman. -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 - Dec 31 0:00 0 S -Rule StJohns 1943 only - May 30 0:00 1:00 D -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 - Sep 2 0:00 0 S -Rule StJohns 1945 only - Jan 1 0:00 1:00 D -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. -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 -Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S -Rule StJohns 1960 max - Oct lastSun 2:00 0 S -Rule StJohns 1987 only - Apr Sun>=1 2:00 1:00 D -Rule StJohns 1988 only - Apr Sun>=1 2:00 2:00 D -Rule StJohns 1989 max - Apr Sun>=1 2:00 1:00 D -# 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 - -3:31 StJohns N%sT 1935 Mar 30 - -3:30 StJohns N%sT - -# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -Rule Halifax 1902 only - Jun 15 0:00 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 1918 only - Apr 14 2:00 1:00 D -Rule Halifax 1918 only - Oct 31 2:00 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 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 1942 only - Feb 9 2:00 1:00 D -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 -Rule Halifax 1962 max - Oct lastSun 2:00 0 S -Rule Halifax 1987 max - Apr Sun>=1 2:00 1:00 D -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Halifax -4:14:24 - LMT 1902 Jun 15 - -4:00 Halifax A%sT - -# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -Rule Mont 1884 only - Jan 1 0:00 0 S -Rule Mont 1917 only - Mar 25 2:00 1:00 D -Rule Mont 1917 only - Apr 24 0:00 0 S -Rule Mont 1918 only - Apr 14 2:00 1:00 D -Rule Mont 1918 only - Oct 31 2:00 0 S -Rule Mont 1919 only - Mar 31 2:30 1:00 D -Rule Mont 1919 only - Oct 25 2:30 0 S -Rule Mont 1920 only - May 2 2:30 1:00 D -Rule Mont 1920 only - Oct 3 2:30 0 S -Rule Mont 1921 only - May 1 2:00 1:00 D -Rule Mont 1921 only - Oct 2 2:30 0 S -Rule Mont 1922 only - Apr 30 2:00 1:00 D -Rule Mont 1922 only - Oct 1 2:30 0 S -Rule Mont 1924 only - May 17 2:00 1:00 D -Rule Mont 1924 1926 - Sep lastSun 2:30 0 S -Rule Mont 1925 1926 - May Sun>=1 2:00 1:00 D -Rule Mont 1927 only - May 1 0:00 1:00 D -Rule Mont 1927 1932 - Sep Sun>=25 0:00 0 S -Rule Mont 1928 1931 - Apr Sun>=25 0:00 1:00 D -Rule Mont 1932 only - May 1 0:00 1:00 D -Rule Mont 1933 1940 - Apr Sun>=24 0:00 1:00 D -Rule Mont 1933 only - Oct 1 0:00 0 S -Rule Mont 1934 1939 - Sep Sun>=24 0:00 0 S -Rule Mont 1945 1948 - Sep lastSun 2:00 0 S -Rule Mont 1946 1986 - Apr lastSun 2:00 1:00 D -Rule Mont 1949 1950 - Oct lastSun 2:00 0 S -Rule Mont 1951 1956 - Sep lastSun 2:00 0 S -Rule Mont 1957 max - Oct lastSun 2:00 0 S -Rule Mont 1987 max - Apr Sun>=1 2:00 1:00 D -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Montreal -4:54:16 - LMT 1884 - -5:00 Mont E%sT - -# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -Rule Winn 1887 only - Jul 16 0:00 0 S -Rule Winn 1916 only - Apr 23 0:00 1:00 D -Rule Winn 1916 only - Sep 17 0:00 0 S -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 23 2:00 0 S -Rule Winn 1942 only - Feb 9 2:00 1:00 D -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 -Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D -Rule Winn 1947 1958 - Sep lastSun 2:00 0 S -Rule Winn 1948 only - May 1 2:00 1:00 D -Rule Winn 1948 1960 - Apr lastSun 2:00 1:00 D -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 lastSun 2:00 0 S -Rule Winn 1966 1986 - Apr lastSun 2:00 1:00 D -Rule Winn 1966 max - Sep lastSun 2:00 0 S -Rule Winn 1987 max - Apr Sun>=1 2:00 1:00 D -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 - -6:00 Winn C%sT - -# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -Rule Regina 1905 only - Sep 1 0:00 0 S -Rule Regina 1918 only - Apr 14 2:00 1:00 D -Rule Regina 1918 only - Oct 31 2:00 0 S -Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D -Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S -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 1945 only - Sep lastSun 2:00 0 S -Rule Regina 1946 only - Apr 14 2:00 1:00 D -Rule Regina 1946 only - Oct 13 2:00 0 S -Rule Regina 1947 1960 - Apr lastSun 2:00 1:00 D -Rule Regina 1947 1959 - Sep lastSun 2:00 0 S -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Regina -6:58:36 - LMT 1905 Sep - -7:00 Regina M%sT 1966 Apr 15 - -6:00 - CST - -# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -Rule Edm 1906 only - Sep 1 0:00 0 S -Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D -Rule Edm 1918 only - Oct 31 2:00 0 S -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 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 -Rule Edm 1967 only - Apr lastSun 2:00 1:00 D -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 -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Edmonton -7:33:52 - LMT 1906 Sep - -7:00 Edm M%sT - -# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -Rule Vanc 1884 only - Jan 1 0:00 0 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 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 -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Vancouver -8:12:28 - LMT 1884 - -8:00 Vanc P%sT - -# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -Rule Yukon 1900 only - Jan 1 0:00 0 S -Rule Yukon 1918 only - Apr 14 2:00 1:00 D -Rule Yukon 1918 only - Oct 27 2:00 0 S -Rule Yukon 1919 only - May 25 2:00 1:00 D -Rule Yukon 1919 only - Nov 1 0:00 0 S -Rule Yukon 1942 only - Feb 9 2:00 1:00 D -Rule Yukon 1965 only - Apr 25 0:00 1:00 D -Rule Yukon 1965 only - Oct 31 2:00 0 S -Rule Yukon 1980 1986 - Apr lastSun 2:00 1:00 D -Rule Yukon 1980 max - Oct lastSun 2:00 0 S -Rule Yukon 1987 max - Apr Sun>=1 2:00 1:00 D -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 - -9:00 Yukon Y%sT 1966 Jul - -8:00 Yukon P%sT -# Parts of Yukon (e.g. Dawson) didn't switch to -8:00 until 1973 Oct 28. - -############################################################################### - -# Mexico - -# From Guy Harris: -# Rules are from the Official Airline Guide, Worldwide Edition, for 1987. -# Rules prior to 1987 are unknown. -# The comments in the OAG say "Only Ensenada, Mexicale, San Felipe and Tijuana -# observe DST." This is presumably Baja California Norte, above 28th parallel, -# as listed there; Mexico/BajaSur is for "Baja California Sur and N. Pacific -# Coast (States of Sinaloa and Sonora)." - -# From Bob Devine (January 28, 1988): -# The Federal District (where Mexico City is) has observed [DST] several -# times but not recently. -# -# I don't where to drawn the line in the North Baja area. 28th latitude -# sounds good -- but it may be higher (how far [d]o radio stations from -# San Diego affect culture?). -# -# The dates of DST probably go back to 1981. The rules are the same as -# US's. This is going to be a headache for US presidential electi[o]n years! - -# From Arthur David Olson (February 13, 1988) -# Since the 1981 starting date is only "probable," we'll keep the 1987 -# starting date below. - -# From U. S. Naval Observatory (January 19, 1989): -# MEXICO BAJA CAL N 7 H BEHIND UTC BAJA CALIFORNIA SUR AND -# MEXICO BAJA CAL N N. PACIFIC COAST (STATES -# MEXICO BAJA CAL N OF SINALOA AND SONORA) -# MEXICO BAJA CAL N 8 H BEHIND UTC ABOVE 28TH PARALLAL APR 3 -# MEXICO BAJA CAL N - OCT 29 -# MEXICO BAJA CAL N 7 H BEHIND UTC ABOVE 28TH PARALLAL APR 3 -# MEXICO BAJA CAL N - 0CT 29 -# MEXICO 6 H BEHIND UTC STATES OF DURANGO, -# MEXICO COAHUILA, NUEVO LEON, -# MEXICO TAMAULIPAS -# MEXICO 5 H BEHIND UTC STATES OF DURANGO, -# MEXICO COAHUILA, NUEVO LEON, -# MEXICO TAMAULIPAS APR 3 - OCT 29 -# MEXICO 6 H BEHIND UTC GENERAL MEXICO, STATES OF -# MEXICO CAMPECHE, QUINTANA ROO AND -# MEXICO YUCATAN - -# From Arthur David Olson (January 21, 1989): -# April 3 fell on a Sunday in 1988; October 29 fell on a Sunday in 1989. Ahem. -# USNO claims there should be four Mexican zones rather than three: -# a zone that's GMT-8 with DST; a zone that's always GMT-7; -# a zone that's GMT-6 with DST; and a zone that's always GMT-6. - -# From Paul Eggert <eggert@twinsun.com> (November 18, 1993): -# Shanks also says there are four zones, but disagrees about the fourth. -# Instead of GMT-6 with DST, he says there's GMT-8 without DST. - -# From Shanks (1991): -# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -Rule Mexico 1922 only - Jan 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 -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 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 BajaN 1950 1966 - Apr lastSun 2:00 1:00 D -Rule BajaN 1950 1961 - Sep lastSun 2:00 0 S -Rule BajaN 1961 1966 - Oct lastSun 2:00 0 S -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 - -7:00 - MST 1927 Jun 10 23:00 - -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 - -6:00 Mexico C%sT -Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 - -7:00 - MST 1927 Jun 10 23:00 - -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 - -6:00 - CST 1942 Apr - -7:00 - MST 1949 Jan 14 - -8:00 - PST 1970 - -7:00 - MST -Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 - -8:00 - PST 1927 Jun 10 23:00 - -7:00 - MST 1930 Nov 16 - -8:00 - PST 1942 Apr - -7:00 - MST 1949 Jan 14 - -8:00 BajaN P%sT 1967 Apr lastSun 2:00 - -8:00 US P%sT -Zone America/Ensenada -7:46:28 - LMT 1922 Jan 1 0:13:32 - -8:00 - PST 1927 Jun 10 23:00 - -7:00 - MST 1930 Nov 16 - -8:00 - PST 1942 Apr - -7:00 - MST 1949 Jan 14 - -8:00 - PST -# -# Revillagigedo Is -# no information - -############################################################################### - -# Anguilla -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Anguilla -4:12:16 - LMT 1912 Mar 2 - -4:00 - AST - -# Antigua and Barbuda -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Antigua -4:07:12 - LMT 1912 Mar 2 - -5:00 - EST 1951 - -4:00 - AST - -# Bahamas -# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -Rule Bahamas 1912 only - Mar 2 0:00 0 S -Rule Bahamas 1964 max - Oct lastSun 2:00 0 S -Rule Bahamas 1964 1986 - Apr lastSun 2:00 1:00 D -Rule Bahamas 1987 max - Apr Sun>=1 2:00 1:00 D -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Nassau -5:09:24 - LMT 1912 Mar 2 - -5:00 Bahamas E%sT - -# Barbados -# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -Rule Barb 1932 only - Jan 1 0:00 0 S -Rule Barb 1977 only - Jun 12 2:00 1:00 D -Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S -Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D -Rule Barb 1979 only - Sep 30 2:00 0 S -Rule Barb 1980 only - Sep 25 2:00 0 S -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Barbados -3:58:28 - LMT 1924 # Bridgetown - -3:58 - BMT 1932 # Bridgetown Mean Time - -4:00 Barb A%sT - -# Belize -# Whitman entirely disagrees with Shanks; go with Shanks. -# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -Rule Belize 1912 only - Apr 1 0:00 0 S -Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD -Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S -Rule Belize 1973 only - Dec 5 0:00 1:00 D -Rule Belize 1974 only - Feb 9 0:00 0 S -Rule Belize 1982 only - Dec 18 0:00 1:00 D -Rule Belize 1983 only - Feb 12 0:00 0 S -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Belize -5:52:48 - LMT 1912 Apr - -6:00 Belize C%sT - -# Bermuda -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone Atlantic/Bermuda -4:19:04 - LMT 1930 Jan 1 2:00 # Hamilton - -4:00 - AST 1974 Apr 28 2:00 - -4:00 Bahamas A%sT - -# Cayman Is -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown - -5:07 - KMT 1912 Feb # Kingston Mean Time - -5:00 - EST - -# Clipperton -# no information - -# Costa Rica -# Shanks gives some very odd dates for 1991, and stops there. -# For now, we won't guess further. -# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -Rule CR 1921 only - Jan 15 0:00 0 S -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 only - Jan 19 0:00 1:00 D -Rule CR 1991 only - Jul 1 0:00 0 S -# There are too many San Joses elsewhere, so we'll use `Costa Rica'. -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Costa_Rica -5:36:20 - LMT 1890 # San Jose - -5:36 - SJMT 1921 Jan 15 # San Jose Mean Time - -6:00 CR C%sT -# Coco -# no information; probably like America/Costa_Rica - -# Cuba - -# From Bob Devine (January 28, 1988): -# . . .DST is from 2nd Sunday in May to 2nd Sunday in October since 1981. -# Change at midnight. In 1979 & 1980, started at 3rd Sunday in March -# (I think). - -# From U. S. Naval Observatory (January 19, 1989): -# CUBA 5 H BEHIND UTC -# CUBA 4 H BEHIND UTC MAR 20 - OCT 8 - -# From Shanks (1991): -# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -Rule Cuba 1925 only - Jul 19 12:00 0 S -Rule Cuba 1928 only - Jun 10 0:00 1:00 D -Rule Cuba 1928 only - Oct 10 0:00 0 S -Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D -Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S -Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D -Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S -Rule Cuba 1965 only - Jun 1 0:00 1:00 D -Rule Cuba 1965 only - Sep 30 0:00 0 S -Rule Cuba 1966 only - May 29 0:00 1:00 D -Rule Cuba 1966 only - Oct 2 0:00 0 S -Rule Cuba 1967 only - Apr 8 0:00 1:00 D -Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S -Rule Cuba 1968 only - Apr 14 0:00 1:00 D -Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D -Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S -Rule Cuba 1972 1974 - Oct 8 0:00 0 S -Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S -Rule Cuba 1978 only - May 7 0:00 1:00 D -Rule Cuba 1978 1980 - Oct Sun>=8 0:00 0 S -Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D -Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D -Rule Cuba 1981 max - Oct Sun>=8 0:00 0 S -Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D -Rule Cuba 1990 only - Apr 1 0:00 1:00 D -Rule Cuba 1991 max - Mar Sun>=14 0:00 1:00 D - -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Havana -5:29:28 - LMT 1890 - -5:30 - HMT 1925 Jul 19 12:00 # Havana MT - -5:00 Cuba C%sT - -# Dominica -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau - -4:00 - AST - -# Dominican Republic -# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -Rule DR 1933 only - Apr 1 12:00 0 S -Rule DR 1966 only - Oct 30 0:00 1:00 D -Rule DR 1967 only - Feb 28 0:00 0 S -Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD -Rule DR 1970 only - Feb 21 0:00 0 S -Rule DR 1971 only - Jan 20 0:00 0 S -Rule DR 1972 1974 - Jan 21 0:00 0 S -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -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 - -# El Salvador -# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -Rule Salv 1921 only - Jan 1 0:00 0 S -Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D -Rule Salv 1987 1988 - Sep lastSun 0:00 0 S -# There are too many San Salvadors elsewhere, so we'll use `El Salvador'. -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador - -6:00 Salv C%sT - -# Grenada -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Grenada -4:07:00 - LMT 1911 Jul - -4:00 - AST - -# Guadeloupe -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe a Pitre - -4:00 - AST - -# Guatemala -# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -Rule Guat 1918 only - Oct 5 0:00 0 S -Rule Guat 1973 only - Nov 25 0:00 1:00 D -Rule Guat 1974 only - Feb 24 0:00 0 S -Rule Guat 1983 only - May 21 0:00 1:00 D -Rule Guat 1983 only - Sep 22 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 - -# Haiti -# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -Rule Haiti 1917 only - Jan 24 12:00 0 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 -Rule Haiti 1988 max - Apr Sun>=1 2:00 1:00 D -Rule Haiti 1988 max - Oct lastSun 2:00 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. -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr - -6:00 Salv C%sT - -# Jamaica - -# From Bob Devine (January 28, 1988): -# Follows US rules. - -# From U. S. Naval Observatory (January 19, 1989): -# JAMAICA 5 H BEHIND UTC - -# From Shanks (1991): -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Jamaica -5:07:12 - LMT 1890 # Kingston - -5:07 - KMT 1912 Feb # Kingston Mean Time - -5:00 - EST 1974 Jan 6 2:00 - -5:00 US E%sT - -# Martinique -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France - -4:04 - FFMT 1911 May # Fort-de-France MT - -4:00 - AST 1980 Apr 6 - -4:00 1:00 ADT 1980 Sep 28 - -4:00 - AST - -# Montserrat -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Plymouth - -4:00 - AST - -# Nicaragua -# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -Rule Nic 1975 only - Feb 16 0:00 0 S -Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D -Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Managua -5:45:08 - LMT 1890 - -5:45 - MMT 1934 Jun 23 # Managua Mean Time - -6:00 - CST 1973 May - -5:00 - EST 1975 Feb 16 - -6:00 Nic C%sT - -# Panama -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Panama -5:18:08 - LMT 1890 - -5:20 - PMT 1908 Apr 22 # Panama Mean Time - -5:00 - EST - -# Puerto Rico -# There are too many San Juans elsewhere, so we'll use `Puerto_Rico'. -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Puerto_Rico -4:24:28 - LMT 1899 Mar 28 12:00 # San Juan - -4:00 - AST 1942 May 3 - -4:00 1:00 ADT 1945 Sep 30 2:00 - -4:00 - AST - -# St Kitts-Nevis -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre - -4:00 - AST - -# St Lucia -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/St_Lucia -4:04:00 - LMT 1890 # Castries - -4:04 - CMT 1912 # Castries Mean Time - -4:00 - AST - -# St Pierre and Miquelon -# There are too many St Pierres elsewhere, so we'll use `Miquelon'. -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre - -4:00 - AST 1980 May - -3:00 Mont SP%sT - -# St Vincent and the Grenadines -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown - -4:05 - KMT 1912 # Kingstown Mean Time - -4:00 - AST - -# Turks and Caicos -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Grand_Turk -4:44:32 - LMT 1890 - -5:07 - KMT 1912 Feb # Kingston Mean Time - -5:00 - EST 1979 Apr 29 2:00 - -5:00 US E%sT - -# Virgin Is (British and US) -# Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Virgin -4:19:44 - LMT 1911 Jul # Charlotte Amalie - -4:00 - AST |