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1# @(#)northamerica 7.28
2# also includes Central America and the Caribbean
3
4# This data is by no means authoritative; if you think you know better,
5# go ahead and edit the file (and please send any changes to
6# tz@elsie.nci.nih.gov for general use in the future).
7
8# From Paul Eggert <eggert@twinsun.com> (1994-08-17):
9# A reliable and entertaining source about time zones is

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457Link America/Los_Angeles PST8PDT
458Link America/Indianapolis EST
459Link America/Phoenix MST
460Link Pacific/Honolulu HST
461
462################################################################################
463
464
465# From Paul Eggert <eggert@twinsun.com> (1993-11-18):
466# A good source for time zone historical data outside the US is
467# Thomas G. Shanks, The International Atlas (3rd edition),
468# San Diego: ACS Publications, Inc. (1991).
469# Except where otherwise noted, it is the source for the data below.
470#
471# Another source occasionally used is Edward W. Whitman, World Time Differences,
472# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), which
473# I found in the UCLA library.
474#
475# See the `europe' file for Greenland.
476#
477# See the `africa' file for time zone naming and abbreviation conventions.
478

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518Rule Canada 1918 only - Oct 31 2:00 0 S
519Rule Canada 1942 only - Feb 9 2:00 1:00 D
520Rule Canada 1945 only - Sep 30 2:00 0 S
521Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D
522Rule Canada 1974 max - Oct lastSun 2:00 0 S
523Rule Canada 1987 max - Apr Sun>=1 2:00 1:00 D
524
525
526# Newfoundland
527
528# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
529Rule StJohns 1917 1918 - Apr Sun>=8 2:00 1:00 D
530Rule StJohns 1917 only - Sep 17 2:00 0 S
531Rule StJohns 1918 only - Oct 31 2:00 0 S
532# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks.
533Rule StJohns 1919 only - May 5 23:00 1:00 D
534Rule StJohns 1919 only - Aug 12 23:00 0 S

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555Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S
556Rule StJohns 1960 max - Oct lastSun 2:00 0 S
557Rule StJohns 1987 only - Apr Sun>=1 2:00 1:00 D
558Rule StJohns 1988 only - Apr Sun>=1 2:00 2:00 DD
559Rule StJohns 1989 max - Apr Sun>=1 2:00 1:00 D
560# St John's has an apostrophe, but Posix file names can't have apostrophes.
561# Zone NAME GMTOFF RULES FORMAT [UNTIL]
562Zone America/St_Johns -3:30:52 - LMT 1884
563 -3:31 StJohns N%sT 1935 Mar 30
564 -3:30 StJohns N%sT
565
566
567# Labrador, New Brunswick, Nova Scotia, Prince Edward I
568
569# From Paul Eggert (1996-06-12):
570# Shanks writes that since 1970 most of this region has been like Halifax.
571# Many locales did not observe peacetime DST until 1972;
572# Glace Bay, NS is the largest that we know of.
573# Shanks also writes that Liverpool, NS was the only town in Canada to observe
574# DST in 1971 but not 1970; for now we'll assume this is a typo.
575
576# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S

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820Zone America/Dawson_Creek -8:00:56 - LMT 1884
821 -8:00 Canada P%sT 1947
822 -8:00 Vanc P%sT 1972 Aug 30 2:00
823 -7:00 - MST
824
825
826# Northwest Territories, Yukon
827
828# From Paul Eggert (1996-06-12):
829# Dawson switched to PST in 1973. Inuvik switched to MST in 1979.
830# Shanks's table for Watson Lake is corrupted, so we have no data there.
831
832# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
833Rule NT_YK 1918 only - Apr 14 2:00 1:00 D
834Rule NT_YK 1918 only - Oct 27 2:00 0 S
835Rule NT_YK 1919 only - May 25 2:00 1:00 D
836Rule NT_YK 1919 only - Nov 1 0:00 0 S
837Rule NT_YK 1942 only - Feb 9 2:00 1:00 D
838Rule NT_YK 1945 only - Sep 30 2:00 0 S

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852 -7:00 NT_YK M%sT
853Zone America/Inuvik -8:54:00 - LMT 1884
854 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00
855 -7:00 NT_YK M%sT
856Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20
857 -9:00 NT_YK Y%sT 1966 Jul 1 2:00
858 -8:00 NT_YK P%sT
859Zone America/Dawson -9:17:40 - LMT 1900 Aug 20
860 -9:00 NT_YK Y%sT 1973 Oct lastSun 2:00
861 -8:00 NT_YK P%sT
862
863
864###############################################################################
865
866# Mexico
867
868# From Guy Harris:

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1065# uninhabited
1066
1067# Costa Rica
1068# Shanks gives some very odd dates for 1991, and stops there.
1069# For now, we won't guess further.
1070# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1071Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D
1072Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S
1073Rule CR 1991 only - Jan 19 0:00 1:00 D
1074Rule CR 1991 only - Jul 1 0:00 0 S
1075# There are too many San Joses elsewhere, so we'll use `Costa Rica'.
1076# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1077Zone America/Costa_Rica -5:36:20 - LMT 1890 # San Jose
1078 -5:36 - SJMT 1921 Jan 15 # San Jose Mean Time
1079 -6:00 CR C%sT
1080# Coco
1081# no information; probably like America/Costa_Rica
1082

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1109Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D
1110Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S
1111Rule Cuba 1972 1974 - Oct 8 0:00 0 S
1112Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S
1113Rule Cuba 1978 only - May 7 0:00 1:00 D
1114Rule Cuba 1978 1980 - Oct Sun>=8 0:00 0 S
1115Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D
1116Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D
1117Rule Cuba 1981 max - Oct Sun>=8 0:00 0 S
1118Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D
1119Rule Cuba 1990 only - Apr 1 0:00 1:00 D
1120Rule Cuba 1991 max - Mar Sun>=14 0:00 1:00 D
1121
1122# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1123Zone America/Havana -5:29:28 - LMT 1890
1124 -5:30 - HMT 1925 Jul 19 12:00 # Havana MT
1125 -5:00 Cuba C%sT
1126
1127# Dominica
1128# Zone NAME GMTOFF RULES FORMAT [UNTIL]

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1163 -4:00 - AST
1164
1165# Guatemala
1166# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1167Rule Guat 1973 only - Nov 25 0:00 1:00 D
1168Rule Guat 1974 only - Feb 24 0:00 0 S
1169Rule Guat 1983 only - May 21 0:00 1:00 D
1170Rule Guat 1983 only - Sep 22 0:00 0 S
1171# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1172Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5
1173 -6:00 Guat C%sT
1174
1175# Haiti
1176# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1177Rule Haiti 1983 only - May 8 0:00 1:00 D
1178Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D
1179Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S
1180Rule Haiti 1988 max - Apr Sun>=1 2:00 1:00 D
1181Rule Haiti 1988 max - Oct lastSun 2:00 0 S
1182# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1183Zone America/Port-au-Prince -4:49:20 - LMT 1890
1184 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT
1185 -5:00 Haiti E%sT
1186
1187# Honduras
1188# Shanks says 1921 Jan 1; go with Whitman's more precise Apr 1.
1189# Zone NAME GMTOFF RULES FORMAT [UNTIL]

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1198# From U. S. Naval Observatory (1989-01-19):
1199# JAMAICA 5 H BEHIND UTC
1200
1201# From Shanks (1991):
1202# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1203Zone America/Jamaica -5:07:12 - LMT 1890 # Kingston
1204 -5:07 - KMT 1912 Feb # Kingston Mean Time
1205 -5:00 - EST 1974 Jan 6 2:00
1206 -5:00 US E%sT
1207
1208# Martinique
1209# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1210Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France
1211 -4:04 - FFMT 1911 May # Fort-de-France MT
1212 -4:00 - AST 1980 Apr 6
1213 -4:00 1:00 ADT 1980 Sep 28
1214 -4:00 - AST
1215
1216# Montserrat
1217# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1218Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Plymouth
1219 -4:00 - AST
1220
1221# Nicaragua
1222# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1223Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D
1224Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S
1225# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1226Zone America/Managua -5:45:08 - LMT 1890
1227 -5:45 - MMT 1934 Jun 23 # Managua Mean Time
1228 -6:00 - CST 1973 May
1229 -5:00 - EST 1975 Feb 16
1230 -6:00 Nic C%sT
1231
1232# Panama
1233# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1234Zone America/Panama -5:18:08 - LMT 1890
1235 -5:20 - PMT 1908 Apr 22 # Panama Mean Time
1236 -5:00 - EST
1237
1238# Puerto Rico

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1263
1264# St Vincent and the Grenadines
1265# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1266Zone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown
1267 -4:05 - KMT 1912 # Kingstown Mean Time
1268 -4:00 - AST
1269
1270# Turks and Caicos
1271# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1272Zone America/Grand_Turk -4:44:32 - LMT 1890
1273 -5:07 - KMT 1912 Feb # Kingston Mean Time
1274 -5:00 - EST 1979 Apr 29 2:00
1275 -5:00 US E%sT
1276
1277# British Virgin Is
1278# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1279Zone America/Tortola -4:18:28 - LMT 1911 Jul # Road Town
1280 -4:00 - AST
1281
1282# Virgin Is
1283# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1284Zone America/St_Thomas -4:19:44 - LMT 1911 Jul # Charlotte Amalie
1285 -4:00 - AST