1# @(#)northamerica 7.11
| 1# @(#)northamerica 7.15
|
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> (August 17, 1994):
9# A reliable and entertaining source about time zones is
10# Derek Howse, Greenwich time and the discovery of the longitude,
11# Oxford University Press (1980).
12
13###############################################################################
14
15# United States
16
17# From Arthur David Olson:
18# US Daylight Saving Time ended on the last Sunday of *October* in 1974.
19# See, for example, the front page of the Saturday, October 26, 1974
20# and Sunday, October 27, 1974 editions of the Washington Post.
21
22# From seismo!munnari!kre:
23# I recall also being told by someone once that Canada didn't have
24# the DST variations in 74/75 that the US did, but I am not nearly
25# sure enough of this to add anything.
26
27# From Arthur David Olson:
28# The above has been confirmed by Bob Devine; we'll go with it here.
29
30# From Arthur David Olson:
31# Before the Uniform Time Act of 1966 took effect in 1967, observance of
32# Daylight Saving Time in the US was by local option, except during wartime.
33
34# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
35Rule US 1918 1919 - Mar lastSun 2:00 1:00 D
36Rule US 1918 1919 - Oct lastSun 2:00 0 S
37Rule US 1942 only - Feb 9 2:00 1:00 W # War
38Rule US 1945 only - Sep 30 2:00 0 S
39Rule US 1967 max - Oct lastSun 2:00 0 S
40Rule US 1967 1973 - Apr lastSun 2:00 1:00 D
41Rule US 1974 only - Jan 6 2:00 1:00 D
42Rule US 1975 only - Feb 23 2:00 1:00 D
43Rule US 1976 1986 - Apr lastSun 2:00 1:00 D
44Rule US 1987 max - Apr Sun>=1 2:00 1:00 D
45
46# From Bob Devine (January 28, 1988):
47# ...Alaska (and Hawaii) had the timezone names changed in 1967.
48# old new
49# Pacific Standard Time(PST) -same-
50# Yukon Standard Time(YST) -same-
51# Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST)
52# Nome Standard Time (NT) Bering Standard Time (BST)
53#
54# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz.
55# The YST zone now covers nearly all of the state, AHST just part
56# of the Aleutian islands. No DST.
57
58# From U. S. Naval Observatory (January 19, 1989):
59# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON
60# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30
61# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON
62# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30
63# USA MOUNTAIN 7 H BEHIND UTC DENVER
64# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30
65# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO
66# USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30
67# USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST)
68# USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT)
69# USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W
70# USA - " - 9 H BEHIND UTC APR 3 - OCT 30
71# USA HAWAII 10 H BEHIND UTC
72# USA BERING 11 H BEHIND UTC SAMOA, MIDWAY
73
74# From Arthur David Olson (January 21, 1989):
75# The above dates are for 1988.
76# Note the "AKST" and "AKDT" abbreviations, the claim that there's
77# no DST in Samoa, and the claim that there is DST in Alaska and the
78# Aleutians.
79
80# From Arthur David Olson (February 13, 1988):
81# Legal standard time zone names, from United States Code (1982 Edition and
82# Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names
83# up to April 1, 1967 (when most provisions of the Uniform Time Act of 1966
84# took effect), as explained in sections 263 and 261:
85# (none)
86# United States standard eastern time
87# United States standard mountain time
88# United States standard central time
89# United States standard Pacific time
90# (none)
91# United States standard Alaska time
92# (none)
93# Next, names from April 1, 1967 until November 30, 1983 (the date for
94# public law 98-181):
95# Atlantic standard time
96# eastern standard time
97# central standard time
98# mountain standard time
99# Pacific standard time
100# Yukon standard time
101# Alaska-Hawaii standard time
102# Bering standard time
103# And after November 30, 1983:
104# Atlantic standard time
105# eastern standard time
106# central standard time
107# mountain standard time
108# Pacific standard time
109# Alaska standard time
110# Hawaii-Aleutian standard time
111# Samoa standard time
112# The law doesn't give abbreviations.
113
114# From Paul Eggert <eggert@twinsun.com> (August 16, 1994):
115# Howse writes that Alaska switched from the Julian to the Gregorian calendar,
116# and from east-of-GMT to west-of-GMT days, in 1867 when the US purchased it
117# from Russia. We don't have this data pinned down yet, though.
118
119# Easy stuff first--including Alaska, where we ignore history (since we
120# can't tell if we should give Yukon time or Alaska-Hawaii time for "old"
121# times).
122
123# Zone NAME GMTOFF RULES FORMAT [UNTIL]
124Zone America/New_York -5:00 US E%sT
125Zone America/Chicago -6:00 US C%sT
126Zone America/Denver -7:00 US M%sT
127Zone America/Los_Angeles -8:00 US P%sT
128Zone America/Anchorage -9:00 US AK%sT
129 # AK%sT is the abbreviation per USNO
130
131# ZONE-DESCR America New_York United_States Eastern time (except Indiana and Michigan)
132# ZONE-DESCR America Chicago United_States Central time
133# ZONE-DESCR America Denver United_States Mountain time (except Arizona)
134# ZONE-DESCR America Los_Angeles United_States Pacific time
135# ZONE-DESCR America Anchorage United_States Alaska time
136
137# Mainland US areas that are always Standard as of 1986.
138
139Zone America/Fort_Wayne -5:00 US E%sT 1946
140 -5:00 - EST # Always EST as of 1986
141
142# From Arthur David Olson (October 28, 1991):
143# An article on page A3 of the Sunday, October 27, 1991 Washington Post
144# notes that Starke County switched from Central time to Eastern time as of
145# October 27, 1991.
146Zone America/Knox_IN -6:00 US C%sT 1991 Oct 27 2:00
147 -5:00 - EST # Always EST as of 1991
148Zone America/Phoenix -7:00 US M%sT 1946
149 -7:00 - MST # Always MST as of 1986
150
151# ZONE-DESCR America Fort_Wayne United_States Indiana (except Starke County)
152# ZONE-DESCR America Knox_IN United_States Indiana (Starke County)
153# ZONE-DESCR America Phoenix United_States Arizona (except Navajo Nation)
| 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> (August 17, 1994):
9# A reliable and entertaining source about time zones is
10# Derek Howse, Greenwich time and the discovery of the longitude,
11# Oxford University Press (1980).
12
13###############################################################################
14
15# United States
16
17# From Arthur David Olson:
18# US Daylight Saving Time ended on the last Sunday of *October* in 1974.
19# See, for example, the front page of the Saturday, October 26, 1974
20# and Sunday, October 27, 1974 editions of the Washington Post.
21
22# From seismo!munnari!kre:
23# I recall also being told by someone once that Canada didn't have
24# the DST variations in 74/75 that the US did, but I am not nearly
25# sure enough of this to add anything.
26
27# From Arthur David Olson:
28# The above has been confirmed by Bob Devine; we'll go with it here.
29
30# From Arthur David Olson:
31# Before the Uniform Time Act of 1966 took effect in 1967, observance of
32# Daylight Saving Time in the US was by local option, except during wartime.
33
34# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
35Rule US 1918 1919 - Mar lastSun 2:00 1:00 D
36Rule US 1918 1919 - Oct lastSun 2:00 0 S
37Rule US 1942 only - Feb 9 2:00 1:00 W # War
38Rule US 1945 only - Sep 30 2:00 0 S
39Rule US 1967 max - Oct lastSun 2:00 0 S
40Rule US 1967 1973 - Apr lastSun 2:00 1:00 D
41Rule US 1974 only - Jan 6 2:00 1:00 D
42Rule US 1975 only - Feb 23 2:00 1:00 D
43Rule US 1976 1986 - Apr lastSun 2:00 1:00 D
44Rule US 1987 max - Apr Sun>=1 2:00 1:00 D
45
46# From Bob Devine (January 28, 1988):
47# ...Alaska (and Hawaii) had the timezone names changed in 1967.
48# old new
49# Pacific Standard Time(PST) -same-
50# Yukon Standard Time(YST) -same-
51# Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST)
52# Nome Standard Time (NT) Bering Standard Time (BST)
53#
54# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz.
55# The YST zone now covers nearly all of the state, AHST just part
56# of the Aleutian islands. No DST.
57
58# From U. S. Naval Observatory (January 19, 1989):
59# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON
60# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30
61# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON
62# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30
63# USA MOUNTAIN 7 H BEHIND UTC DENVER
64# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30
65# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO
66# USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30
67# USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST)
68# USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT)
69# USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W
70# USA - " - 9 H BEHIND UTC APR 3 - OCT 30
71# USA HAWAII 10 H BEHIND UTC
72# USA BERING 11 H BEHIND UTC SAMOA, MIDWAY
73
74# From Arthur David Olson (January 21, 1989):
75# The above dates are for 1988.
76# Note the "AKST" and "AKDT" abbreviations, the claim that there's
77# no DST in Samoa, and the claim that there is DST in Alaska and the
78# Aleutians.
79
80# From Arthur David Olson (February 13, 1988):
81# Legal standard time zone names, from United States Code (1982 Edition and
82# Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names
83# up to April 1, 1967 (when most provisions of the Uniform Time Act of 1966
84# took effect), as explained in sections 263 and 261:
85# (none)
86# United States standard eastern time
87# United States standard mountain time
88# United States standard central time
89# United States standard Pacific time
90# (none)
91# United States standard Alaska time
92# (none)
93# Next, names from April 1, 1967 until November 30, 1983 (the date for
94# public law 98-181):
95# Atlantic standard time
96# eastern standard time
97# central standard time
98# mountain standard time
99# Pacific standard time
100# Yukon standard time
101# Alaska-Hawaii standard time
102# Bering standard time
103# And after November 30, 1983:
104# Atlantic standard time
105# eastern standard time
106# central standard time
107# mountain standard time
108# Pacific standard time
109# Alaska standard time
110# Hawaii-Aleutian standard time
111# Samoa standard time
112# The law doesn't give abbreviations.
113
114# From Paul Eggert <eggert@twinsun.com> (August 16, 1994):
115# Howse writes that Alaska switched from the Julian to the Gregorian calendar,
116# and from east-of-GMT to west-of-GMT days, in 1867 when the US purchased it
117# from Russia. We don't have this data pinned down yet, though.
118
119# Easy stuff first--including Alaska, where we ignore history (since we
120# can't tell if we should give Yukon time or Alaska-Hawaii time for "old"
121# times).
122
123# Zone NAME GMTOFF RULES FORMAT [UNTIL]
124Zone America/New_York -5:00 US E%sT
125Zone America/Chicago -6:00 US C%sT
126Zone America/Denver -7:00 US M%sT
127Zone America/Los_Angeles -8:00 US P%sT
128Zone America/Anchorage -9:00 US AK%sT
129 # AK%sT is the abbreviation per USNO
130
131# ZONE-DESCR America New_York United_States Eastern time (except Indiana and Michigan)
132# ZONE-DESCR America Chicago United_States Central time
133# ZONE-DESCR America Denver United_States Mountain time (except Arizona)
134# ZONE-DESCR America Los_Angeles United_States Pacific time
135# ZONE-DESCR America Anchorage United_States Alaska time
136
137# Mainland US areas that are always Standard as of 1986.
138
139Zone America/Fort_Wayne -5:00 US E%sT 1946
140 -5:00 - EST # Always EST as of 1986
141
142# From Arthur David Olson (October 28, 1991):
143# An article on page A3 of the Sunday, October 27, 1991 Washington Post
144# notes that Starke County switched from Central time to Eastern time as of
145# October 27, 1991.
146Zone America/Knox_IN -6:00 US C%sT 1991 Oct 27 2:00
147 -5:00 - EST # Always EST as of 1991
148Zone America/Phoenix -7:00 US M%sT 1946
149 -7:00 - MST # Always MST as of 1986
150
151# ZONE-DESCR America Fort_Wayne United_States Indiana (except Starke County)
152# ZONE-DESCR America Knox_IN United_States Indiana (Starke County)
153# ZONE-DESCR America Phoenix United_States Arizona (except Navajo Nation)
|
154# ZONE-DESCR America Navajo United_States Arizona (Navajo Nation)
| 154# ZONE-DESCR America Shiprock United_States Arizona (Navajo Nation)
|
155
156# From Arthur David Olson (February 13, 1988):
157# However. . .a writer from the Inter Tribal Council of Arizona, Inc.,
158# notes in private correspondence dated 12/28/87 that "Presently, only the
159# Navajo Nation participates in the Daylight Saving Time policy, due to its
160# large size and location in three states." (The "only" means that other
161# tribal nations don't use DST.)
162
| 155
156# From Arthur David Olson (February 13, 1988):
157# However. . .a writer from the Inter Tribal Council of Arizona, Inc.,
158# notes in private correspondence dated 12/28/87 that "Presently, only the
159# Navajo Nation participates in the Daylight Saving Time policy, due to its
160# large size and location in three states." (The "only" means that other
161# tribal nations don't use DST.)
162
|
163Link America/Denver America/Navajo
| 163Link America/Denver America/Shiprock
|
164
165# From Bob Devine (January 28, 1988):
166# Michigan didn't observe DST from 1968 to 1973.
167
168Zone America/Detroit -5:00 US E%sT 1968
169 -5:00 - EST 1973
170 -5:00 US E%sT
171
172# ZONE-DESCR America Detroit United_States Michigan
173
174# Samoa just changes names. No DST, per Naval Observatory.
175#
176# Howse writes that in 1879 the King of Samoa decided to change
177# ``the date in his kingdom from the Antipodean to the American system,
178# ordaining -- by a masterpiece of diplomatic flattery -- that
179# the Fourth of July should be celebrated twice in that year.''
180
181Zone Pacific/Pago_Pago 12:37:12 - LMT 1879 Jul 5
182 -11:22:48 - LMT 1911
183 -11:30 - SST 1950
184 -11:00 - NST 1967 Apr # N=Nome
185 -11:00 - BST 1983 Nov 30 # B=Bering
186 -11:00 - SST # S=Samoa
187
188Zone Pacific/Midway -11:49:28 - LMT 1901
189 -11:00 - NST 1967 Apr # N=Nome
190 -11:00 - BST 1983 Nov 30 # B=Bering
191 -11:00 - SST # S=Samoa
192
193# Aleutian has a name change. DST, per Naval Observatory.
194
195Zone America/Atka -10:00 US AH%sT 1983 Nov 30
196 -10:00 US HA%sT
197
198# From Arthur David Olson:
199# And then there's Hawaii.
200# DST was observed for one day in 1933;
201# Standard time was change by half an hour in 1947;
202# it's always standard as of 1986.
203
204Zone Pacific/Honolulu -10:30 US H%sT 1933 Apr 30 2:00
205 -10:30 1:00 HDT 1933 May 1 2:00
206 -10:30 US H%sT 1947 Jun 8 2:00
207 -10:00 - HST
208
209# Same time in American and Western Samoa
210Link Pacific/Pago_Pago Pacific/Apia
211
212# ZONE-DESCR Pacific Pago_Pago United_States American Samoa
213# ZONE-DESCR Pacific Apia Western_Samoa All points
214# ZONE-DESCR Pacific Midway United_States Midway Island
215# ZONE-DESCR America Atka United_States Aleutian Islands
216# ZONE-DESCR Pacific Honolulu United_States Hawaii
217
218# Navassa
219# no information; probably like US/Eastern
220
221
| 164
165# From Bob Devine (January 28, 1988):
166# Michigan didn't observe DST from 1968 to 1973.
167
168Zone America/Detroit -5:00 US E%sT 1968
169 -5:00 - EST 1973
170 -5:00 US E%sT
171
172# ZONE-DESCR America Detroit United_States Michigan
173
174# Samoa just changes names. No DST, per Naval Observatory.
175#
176# Howse writes that in 1879 the King of Samoa decided to change
177# ``the date in his kingdom from the Antipodean to the American system,
178# ordaining -- by a masterpiece of diplomatic flattery -- that
179# the Fourth of July should be celebrated twice in that year.''
180
181Zone Pacific/Pago_Pago 12:37:12 - LMT 1879 Jul 5
182 -11:22:48 - LMT 1911
183 -11:30 - SST 1950
184 -11:00 - NST 1967 Apr # N=Nome
185 -11:00 - BST 1983 Nov 30 # B=Bering
186 -11:00 - SST # S=Samoa
187
188Zone Pacific/Midway -11:49:28 - LMT 1901
189 -11:00 - NST 1967 Apr # N=Nome
190 -11:00 - BST 1983 Nov 30 # B=Bering
191 -11:00 - SST # S=Samoa
192
193# Aleutian has a name change. DST, per Naval Observatory.
194
195Zone America/Atka -10:00 US AH%sT 1983 Nov 30
196 -10:00 US HA%sT
197
198# From Arthur David Olson:
199# And then there's Hawaii.
200# DST was observed for one day in 1933;
201# Standard time was change by half an hour in 1947;
202# it's always standard as of 1986.
203
204Zone Pacific/Honolulu -10:30 US H%sT 1933 Apr 30 2:00
205 -10:30 1:00 HDT 1933 May 1 2:00
206 -10:30 US H%sT 1947 Jun 8 2:00
207 -10:00 - HST
208
209# Same time in American and Western Samoa
210Link Pacific/Pago_Pago Pacific/Apia
211
212# ZONE-DESCR Pacific Pago_Pago United_States American Samoa
213# ZONE-DESCR Pacific Apia Western_Samoa All points
214# ZONE-DESCR Pacific Midway United_States Midway Island
215# ZONE-DESCR America Atka United_States Aleutian Islands
216# ZONE-DESCR Pacific Honolulu United_States Hawaii
217
218# Navassa
219# no information; probably like US/Eastern
220
221
|
222# Old names, for S5 users
223
224# Link LINK-FROM LINK-TO
225Link America/New_York EST5EDT
226Link America/Chicago CST6CDT
227Link America/Denver MST7MDT
228Link America/Los_Angeles PST8PDT
229Link America/Fort_Wayne EST
230Link America/Phoenix MST
231Link Pacific/Honolulu HST
232
| |
233################################################################################
234
235
236# From Paul Eggert <eggert@twinsun.com> (November 18, 1993):
237# A good source for time zone historical data outside the U.S. is
238# Thomas G. Shanks, The International Atlas (3rd edition),
239# San Diego: ACS Publications, Inc. (1991).
240# Except where otherwise noted, it is the source for the data below.
241#
242# Another source occasionally used is Edward W. Whitman, World Time Differences,
243# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), which
244# I found in the UCLA library.
245#
246# I invented the abbreviation SPST for St Pierre Standard Time; SPDT likewise.
247# Corrections are welcome!
248#
| 222################################################################################
223
224
225# From Paul Eggert <eggert@twinsun.com> (November 18, 1993):
226# A good source for time zone historical data outside the U.S. is
227# Thomas G. Shanks, The International Atlas (3rd edition),
228# San Diego: ACS Publications, Inc. (1991).
229# Except where otherwise noted, it is the source for the data below.
230#
231# Another source occasionally used is Edward W. Whitman, World Time Differences,
232# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), which
233# I found in the UCLA library.
234#
235# I invented the abbreviation SPST for St Pierre Standard Time; SPDT likewise.
236# Corrections are welcome!
237#
|
| 238# See the `europe' file for Greenland.
239#
|
249# See the `africa' file for Zone naming conventions.
250
251
252
253# Canada
254
255# Canada is reportedly lots easier than the US--leastways since 1951.
256# I don't know what they did before then.
257# 4.3BSD claims that it's perfectly regular.
258# According to a posting in "comp.bugs.misc", "comp.unix.wizards", etc.
259# on February 8, 1987, by Dave Sherman of the Law Society of Upper Canada,
260# "...Canada (well, Ontario and at least some of the other provinces) are
261# adopting the new daylight savings time rules...". We assume all of
262# Canada is doing so.
263
264# From Bob Devine (January 28, 1988):
265# All of Canada did have DST from your first rule except Saskatchewan.
266# Which parts did not observe DST is hard to pinpoint but most of the
267# province follows the rules.
268# NOTE: those that didn't have DST for that rule, also
269# probably did not have it for several years previous.
270
271# From U. S. Naval Observatory (January 19, 1989):
272# CANADA NEW FDL 3.5H BEHIND UTC ST.JOHN'S
273# CANADA NEW FDL 1.5H BEHIND UTC APR 3 - OCT 29
274# CANADA ATLANTIC 4 H BEHIND UTC HALIFAX
275# CANADA ATLANTIC 3 H BEHIND UTC APR 3 - OCT 29
276# CANADA EASTERN 5 H BEHIND UTC TORONTO, MONTREAL, OTTAWA
277# CANADA EASTERN 4 H BEHIND UTC APR 3 - OCT 29
278# CANADA CENTRAL 6 H BEHIND UTC REGINA, WINNIPEG
279# CANADA CENTRAL 5 H BEHIND UTC APR 3 - OCT 29
280# CANADA MOUNTAIN 7 H BEHIND UTC CALGARY, EDMONTON
281# CANADA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 29
282# CANADA PACIFIC 8 H BEHIND UTC VANCOUVER
283# CANADA PACIFIC 7 H BEHIND UTC APR 3 - OCT 29
284# CANADA YUKON SAME AS PACIFIC DAWSON
285
286# From Arthur David Olson (January 21, 1989):
287# April 3 fell on a Sunday in 1988; October 29 fell on a Sunday in 1989. Ahem.
288# Note claim that there's double DST in Newfoundland and that Yukon should
289# be same as Pacific.
290
291# From W. Jones (jones@skdad.usask.ca) (November 6, 1992):
292# The. . .below is based on information I got from our law library, the
293# provincial archives, and the provincial Community Services department.
294# A precise history would require digging through newspaper archives, and
295# since you didn't say what you wanted, I didn't bother.
296#
297# Saskatchewan is split by a time zone meridian (105W) and over the years
298# the boundary became pretty ragged as communities near it reevaluated
299# their affiliations in one direction or the other. In 1965 a provincial
300# referendum favoured legislating common time practices.
301#
302# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of
303# Saskatchewan 1978) was proclaimed, and established that the eastern
304# part of Saskatchewan would use CST year round, that districts in
305# northwest Saskatchewan would by default follow CST but could opt to
306# follow Mountain Time rules (thus 1 hour difference in the winter and
307# zero in the summer), and that districts in southwest Saskatchewan would
308# by default follow MT but could opt to follow CST.
309#
310# It took a few years for the dust to settle (I know one story of a town
311# on one time zone having its school in another, such that a mom had to
312# serve her family lunch in two shifts), but presently it seems that only
313# a few towns on the border with Alberta (e.g. Lloydminster) follow MT
314# rules any more; all other districts appear to have used CST year round
315# since sometime in the 1960s.
316#
317# Here's how I would summarize things. Establish a "Saskatchewan" CST
318# time zone, and note that it officially exists as of 15 April 1966. Any
319# current exceptions can put themselves in the "Mountain" zone, since
320# those are the rules they follow. Any past exceptions can be forgotten,
321# since that's what those who live here have done.
322
323# From Arthur David Olson (November 21, 1992):
324# East-Saskatchewan kept to avoid problems for folks using that zone by name;
325# plain Saskatchewan added.
326
| 240# See the `africa' file for Zone naming conventions.
241
242
243
244# Canada
245
246# Canada is reportedly lots easier than the US--leastways since 1951.
247# I don't know what they did before then.
248# 4.3BSD claims that it's perfectly regular.
249# According to a posting in "comp.bugs.misc", "comp.unix.wizards", etc.
250# on February 8, 1987, by Dave Sherman of the Law Society of Upper Canada,
251# "...Canada (well, Ontario and at least some of the other provinces) are
252# adopting the new daylight savings time rules...". We assume all of
253# Canada is doing so.
254
255# From Bob Devine (January 28, 1988):
256# All of Canada did have DST from your first rule except Saskatchewan.
257# Which parts did not observe DST is hard to pinpoint but most of the
258# province follows the rules.
259# NOTE: those that didn't have DST for that rule, also
260# probably did not have it for several years previous.
261
262# From U. S. Naval Observatory (January 19, 1989):
263# CANADA NEW FDL 3.5H BEHIND UTC ST.JOHN'S
264# CANADA NEW FDL 1.5H BEHIND UTC APR 3 - OCT 29
265# CANADA ATLANTIC 4 H BEHIND UTC HALIFAX
266# CANADA ATLANTIC 3 H BEHIND UTC APR 3 - OCT 29
267# CANADA EASTERN 5 H BEHIND UTC TORONTO, MONTREAL, OTTAWA
268# CANADA EASTERN 4 H BEHIND UTC APR 3 - OCT 29
269# CANADA CENTRAL 6 H BEHIND UTC REGINA, WINNIPEG
270# CANADA CENTRAL 5 H BEHIND UTC APR 3 - OCT 29
271# CANADA MOUNTAIN 7 H BEHIND UTC CALGARY, EDMONTON
272# CANADA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 29
273# CANADA PACIFIC 8 H BEHIND UTC VANCOUVER
274# CANADA PACIFIC 7 H BEHIND UTC APR 3 - OCT 29
275# CANADA YUKON SAME AS PACIFIC DAWSON
276
277# From Arthur David Olson (January 21, 1989):
278# April 3 fell on a Sunday in 1988; October 29 fell on a Sunday in 1989. Ahem.
279# Note claim that there's double DST in Newfoundland and that Yukon should
280# be same as Pacific.
281
282# From W. Jones (jones@skdad.usask.ca) (November 6, 1992):
283# The. . .below is based on information I got from our law library, the
284# provincial archives, and the provincial Community Services department.
285# A precise history would require digging through newspaper archives, and
286# since you didn't say what you wanted, I didn't bother.
287#
288# Saskatchewan is split by a time zone meridian (105W) and over the years
289# the boundary became pretty ragged as communities near it reevaluated
290# their affiliations in one direction or the other. In 1965 a provincial
291# referendum favoured legislating common time practices.
292#
293# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of
294# Saskatchewan 1978) was proclaimed, and established that the eastern
295# part of Saskatchewan would use CST year round, that districts in
296# northwest Saskatchewan would by default follow CST but could opt to
297# follow Mountain Time rules (thus 1 hour difference in the winter and
298# zero in the summer), and that districts in southwest Saskatchewan would
299# by default follow MT but could opt to follow CST.
300#
301# It took a few years for the dust to settle (I know one story of a town
302# on one time zone having its school in another, such that a mom had to
303# serve her family lunch in two shifts), but presently it seems that only
304# a few towns on the border with Alberta (e.g. Lloydminster) follow MT
305# rules any more; all other districts appear to have used CST year round
306# since sometime in the 1960s.
307#
308# Here's how I would summarize things. Establish a "Saskatchewan" CST
309# time zone, and note that it officially exists as of 15 April 1966. Any
310# current exceptions can put themselves in the "Mountain" zone, since
311# those are the rules they follow. Any past exceptions can be forgotten,
312# since that's what those who live here have done.
313
314# From Arthur David Olson (November 21, 1992):
315# East-Saskatchewan kept to avoid problems for folks using that zone by name;
316# plain Saskatchewan added.
317
|
| 318# From Alain LaBont<e'> <ALB@immedia.ca> (1994-11-14):
319# I post here the time zone abbreviations standardized in Canada
320# for both English and French in the CAN/CSA-Z234.4-89 standard....
321#
322# UTC Standard time Daylight savings time
323# offset French English French English
324# -2:30 - - HAT NDT
325# -3 - - HAA ADT
326# -3:30 HNT NST - -
327# -4 HNA AST HAE EDT
328# -5 HNE EST HAC CDT
329# -6 HNC CST HAR MDT
330# -7 HNR MST HAP PDT
331# -8 HNP PST HAY YDT
332# -9 HNY YST - -
333#
334# HN: Heure Normale ST: Standard Time
335# HA: Heure Avanc<e'>e DT: Daylight saving Time
336#
337# A: de l'Atlantique Atlantic
338# C: du Centre Central
339# E: de l'Est Eastern
340# M: Mountain
341# N: Newfoundland
342# P: du Pacifique Pacific
343# R: des Rocheuses
344# T: de Terre-Neuve
345# Y: du Yukon Yukon
346#
347# From Paul Eggert <eggert@twinsun.com> (1994-11-22):
348# Alas, this sort of thing must be handled by localization software.
|
327
| 349
|
| 350
351
|
328# From Shanks (1991):
329# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
330Rule StJohns 1884 only - Jan 1 0:00 0 S
331Rule StJohns 1917 1918 - Apr Sun>=8 2:00 1:00 D
332Rule StJohns 1917 only - Sep 17 2:00 0 S
333Rule StJohns 1918 only - Oct 31 2:00 0 S
334# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks.
335Rule StJohns 1919 only - May 5 23:00 1:00 D
336Rule StJohns 1919 only - Aug 12 23:00 0 S
337# For 1931-1935 Whitman gives Apr same date; go with Shanks.
338Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D
339Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S
340# For 1936-1941 Shanks gives May Mon>=9 and Oct Mon>=2; go with Whitman.
341Rule StJohns 1936 1941 - May Sun>=8 0:00 1:00 D
342Rule StJohns 1936 1941 - Oct Sun>=1 0:00 0 S
343# Shanks gives 1942 May 11 - 1945 Sep 30; go with Whitman.
344Rule StJohns 1942 only - Mar 1 0:00 1:00 D
345Rule StJohns 1942 only - Dec 31 0:00 0 S
346Rule StJohns 1943 only - May 30 0:00 1:00 D
347Rule StJohns 1943 only - Sep 5 0:00 0 S
348Rule StJohns 1944 only - Jul 10 0:00 1:00 D
349Rule StJohns 1944 only - Sep 2 0:00 0 S
350Rule StJohns 1945 only - Jan 1 0:00 1:00 D
351Rule StJohns 1945 only - Oct 7 2:00 0 S
352# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives
353# Apr 30 - Sep 24; go with Shanks.
354Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D
355Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S
356Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D
357Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S
358Rule StJohns 1960 max - Oct lastSun 2:00 0 S
359Rule StJohns 1987 only - Apr Sun>=1 2:00 1:00 D
360Rule StJohns 1988 only - Apr Sun>=1 2:00 2:00 D
361Rule StJohns 1989 max - Apr Sun>=1 2:00 1:00 D
362# St John's has an apostrophe, but Posix file names can't have apostrophes.
363# Zone NAME GMTOFF RULES FORMAT [UNTIL]
364Zone America/St_Johns -3:30:52 - LMT 1884
365 -3:31 StJohns N%sT 1935 Mar 30
366 -3:30 StJohns N%sT
367
368# ZONE-DESCR America St_Johns Canada Newfoundland
369
370# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
371Rule Halifax 1902 only - Jun 15 0:00 0 S
372Rule Halifax 1916 only - Apr 1 0:00 1:00 D
373Rule Halifax 1916 only - Oct 1 0:00 0 S
374Rule Halifax 1918 only - Apr 14 2:00 1:00 D
375Rule Halifax 1918 only - Oct 31 2:00 0 S
376Rule Halifax 1920 only - May 9 0:00 1:00 D
377Rule Halifax 1920 only - Aug 29 0:00 0 S
378Rule Halifax 1921 only - May 6 0:00 1:00 D
379Rule Halifax 1921 1922 - Sep 5 0:00 0 S
380Rule Halifax 1922 only - Apr 30 0:00 1:00 D
381Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D
382Rule Halifax 1923 only - Sep 4 0:00 0 S
383Rule Halifax 1924 only - Sep 15 0:00 0 S
384Rule Halifax 1925 only - Sep 28 0:00 0 S
385Rule Halifax 1926 only - May 16 0:00 1:00 D
386Rule Halifax 1926 only - Sep 13 0:00 0 S
387Rule Halifax 1927 only - May 1 0:00 1:00 D
388Rule Halifax 1927 only - Sep 26 0:00 0 S
389Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D
390Rule Halifax 1928 only - Sep 9 0:00 0 S
391Rule Halifax 1929 only - Sep 3 0:00 0 S
392Rule Halifax 1930 only - Sep 15 0:00 0 S
393Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S
394Rule Halifax 1933 only - Apr 30 0:00 1:00 D
395Rule Halifax 1933 only - Oct 2 0:00 0 S
396Rule Halifax 1934 only - May 20 0:00 1:00 D
397Rule Halifax 1934 only - Sep 16 0:00 0 S
398Rule Halifax 1935 only - Jun 2 0:00 1:00 D
399Rule Halifax 1935 only - Sep 30 0:00 0 S
400Rule Halifax 1936 only - Jun 1 0:00 1:00 D
401Rule Halifax 1936 only - Sep 14 0:00 0 S
402Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D
403Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S
404Rule Halifax 1939 only - May 28 0:00 1:00 D
405Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D
406Rule Halifax 1942 only - Feb 9 2:00 1:00 D
407Rule Halifax 1945 1959 - Sep lastSun 2:00 0 S
408Rule Halifax 1946 1959 - Apr lastSun 2:00 1:00 D
409Rule Halifax 1962 1986 - Apr lastSun 2:00 1:00 D
410Rule Halifax 1962 max - Oct lastSun 2:00 0 S
411Rule Halifax 1987 max - Apr Sun>=1 2:00 1:00 D
412# Zone NAME GMTOFF RULES FORMAT [UNTIL]
413Zone America/Halifax -4:14:24 - LMT 1902 Jun 15
414 -4:00 Halifax A%sT
415
416# ZONE-DESCR America Halifax Canada Atlantic time
417
418# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
419Rule Mont 1884 only - Jan 1 0:00 0 S
420Rule Mont 1917 only - Mar 25 2:00 1:00 D
421Rule Mont 1917 only - Apr 24 0:00 0 S
422Rule Mont 1918 only - Apr 14 2:00 1:00 D
423Rule Mont 1918 only - Oct 31 2:00 0 S
424Rule Mont 1919 only - Mar 31 2:30 1:00 D
425Rule Mont 1919 only - Oct 25 2:30 0 S
426Rule Mont 1920 only - May 2 2:30 1:00 D
427Rule Mont 1920 only - Oct 3 2:30 0 S
428Rule Mont 1921 only - May 1 2:00 1:00 D
429Rule Mont 1921 only - Oct 2 2:30 0 S
430Rule Mont 1922 only - Apr 30 2:00 1:00 D
431Rule Mont 1922 only - Oct 1 2:30 0 S
432Rule Mont 1924 only - May 17 2:00 1:00 D
433Rule Mont 1924 1926 - Sep lastSun 2:30 0 S
434Rule Mont 1925 1926 - May Sun>=1 2:00 1:00 D
435Rule Mont 1927 only - May 1 0:00 1:00 D
436Rule Mont 1927 1932 - Sep Sun>=25 0:00 0 S
437Rule Mont 1928 1931 - Apr Sun>=25 0:00 1:00 D
438Rule Mont 1932 only - May 1 0:00 1:00 D
439Rule Mont 1933 1940 - Apr Sun>=24 0:00 1:00 D
440Rule Mont 1933 only - Oct 1 0:00 0 S
441Rule Mont 1934 1939 - Sep Sun>=24 0:00 0 S
442Rule Mont 1945 1948 - Sep lastSun 2:00 0 S
443Rule Mont 1946 1986 - Apr lastSun 2:00 1:00 D
444Rule Mont 1949 1950 - Oct lastSun 2:00 0 S
445Rule Mont 1951 1956 - Sep lastSun 2:00 0 S
446Rule Mont 1957 max - Oct lastSun 2:00 0 S
447Rule Mont 1987 max - Apr Sun>=1 2:00 1:00 D
448# Zone NAME GMTOFF RULES FORMAT [UNTIL]
449Zone America/Montreal -4:54:16 - LMT 1884
450 -5:00 Mont E%sT
451
452# ZONE-DESCR America Montreal Canada Eastern time
453
454# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
455Rule Winn 1887 only - Jul 16 0:00 0 S
456Rule Winn 1916 only - Apr 23 0:00 1:00 D
457Rule Winn 1916 only - Sep 17 0:00 0 S
458Rule Winn 1918 only - Apr 14 2:00 1:00 D
459Rule Winn 1918 only - Oct 31 2:00 0 S
460Rule Winn 1937 only - May 16 2:00 1:00 D
461Rule Winn 1937 only - Sep 23 2:00 0 S
462Rule Winn 1942 only - Feb 9 2:00 1:00 D
463Rule Winn 1945 only - Sep lastSun 2:00 0 S
464Rule Winn 1946 only - May 12 2:00 1:00 D
465Rule Winn 1946 only - Oct 13 2:00 0 S
466Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D
467Rule Winn 1947 1958 - Sep lastSun 2:00 0 S
468Rule Winn 1948 only - May 1 2:00 1:00 D
469Rule Winn 1948 1960 - Apr lastSun 2:00 1:00 D
470Rule Winn 1959 only - Oct lastSun 2:00 0 S
471Rule Winn 1960 only - Sep lastSun 2:00 0 S
472Rule Winn 1963 only - Apr lastSun 2:00 1:00 D
473Rule Winn 1963 only - Sep lastSun 2:00 0 S
474Rule Winn 1966 1986 - Apr lastSun 2:00 1:00 D
475Rule Winn 1966 max - Sep lastSun 2:00 0 S
476Rule Winn 1987 max - Apr Sun>=1 2:00 1:00 D
477# Zone NAME GMTOFF RULES FORMAT [UNTIL]
478Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16
479 -6:00 Winn C%sT
480
481# ZONE-DESCR America Winnipeg Canada Manitoba
482
483# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
484Rule Regina 1905 only - Sep 1 0:00 0 S
485Rule Regina 1918 only - Apr 14 2:00 1:00 D
486Rule Regina 1918 only - Oct 31 2:00 0 S
487Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D
488Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S
489Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D
490Rule Regina 1937 only - Oct Sun>=8 0:00 0 S
491Rule Regina 1938 only - Oct Sun>=1 0:00 0 S
492Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S
493Rule Regina 1942 only - Feb 9 2:00 1:00 D
494Rule Regina 1945 only - Sep lastSun 2:00 0 S
495Rule Regina 1946 only - Apr 14 2:00 1:00 D
496Rule Regina 1946 only - Oct 13 2:00 0 S
497Rule Regina 1947 1960 - Apr lastSun 2:00 1:00 D
498Rule Regina 1947 1959 - Sep lastSun 2:00 0 S
499# Zone NAME GMTOFF RULES FORMAT [UNTIL]
500Zone America/Regina -6:58:36 - LMT 1905 Sep
501 -7:00 Regina M%sT 1966 Apr 15
502 -6:00 - CST
503
504# ZONE-DESCR America Regina Canada Saskatchewan
505
506# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
507Rule Edm 1906 only - Sep 1 0:00 0 S
508Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D
509Rule Edm 1918 only - Oct 31 2:00 0 S
510Rule Edm 1919 only - May 27 2:00 0 S
511Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D
512Rule Edm 1920 only - Oct lastSun 2:00 0 S
513Rule Edm 1921 1923 - Sep lastSun 2:00 0 S
514Rule Edm 1942 only - Feb 9 2:00 1:00 D
515Rule Edm 1945 only - Sep lastSun 2:00 0 S
516Rule Edm 1947 only - Apr lastSun 2:00 1:00 D
517Rule Edm 1947 only - Sep lastSun 2:00 0 S
518Rule Edm 1967 only - Apr lastSun 2:00 1:00 D
519Rule Edm 1967 only - Oct lastSun 2:00 0 S
520Rule Edm 1969 only - Apr lastSun 2:00 1:00 D
521Rule Edm 1969 only - Oct lastSun 2:00 0 S
522Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D
523Rule Edm 1972 max - Oct lastSun 2:00 0 S
524Rule Edm 1987 max - Apr Sun>=1 2:00 1:00 D
525# Zone NAME GMTOFF RULES FORMAT [UNTIL]
526Zone America/Edmonton -7:33:52 - LMT 1906 Sep
527 -7:00 Edm M%sT
528
529# ZONE-DESCR America Edmonton Canada Alberta
530
531# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
532Rule Vanc 1884 only - Jan 1 0:00 0 S
533Rule Vanc 1918 only - Apr 14 2:00 1:00 D
534Rule Vanc 1918 only - Oct 31 2:00 0 S
535Rule Vanc 1942 only - Feb 9 2:00 1:00 D
536Rule Vanc 1945 only - Sep 30 2:00 0 S
537Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D
538Rule Vanc 1946 only - Oct 13 2:00 0 S
539Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S
540Rule Vanc 1962 max - Oct lastSun 2:00 0 S
541Rule Vanc 1987 max - Apr Sun>=1 2:00 1:00 D
542# Zone NAME GMTOFF RULES FORMAT [UNTIL]
543Zone America/Vancouver -8:12:28 - LMT 1884
544 -8:00 Vanc P%sT
545
546# ZONE-DESCR America Vancouver Canada British Columbia
547
548# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
549Rule Yukon 1900 only - Jan 1 0:00 0 S
550Rule Yukon 1918 only - Apr 14 2:00 1:00 D
551Rule Yukon 1918 only - Oct 27 2:00 0 S
552Rule Yukon 1919 only - May 25 2:00 1:00 D
553Rule Yukon 1919 only - Nov 1 0:00 0 S
554Rule Yukon 1942 only - Feb 9 2:00 1:00 D
555Rule Yukon 1965 only - Apr 25 0:00 1:00 D
556Rule Yukon 1965 only - Oct 31 2:00 0 S
557Rule Yukon 1980 1986 - Apr lastSun 2:00 1:00 D
558Rule Yukon 1980 max - Oct lastSun 2:00 0 S
559Rule Yukon 1987 max - Apr Sun>=1 2:00 1:00 D
560# Zone NAME GMTOFF RULES FORMAT [UNTIL]
561Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20
562 -9:00 Yukon Y%sT 1966 Jul
563 -8:00 Yukon P%sT
564# Parts of Yukon (e.g. Dawson) didn't switch to -8:00 until 1973 Oct 28.
565
566# ZONE-DESCR America Whitehorse Canada Yukon Territory
567
568###############################################################################
569
570# Mexico
571
572# From Guy Harris:
573# Rules are from the Official Airline Guide, Worldwide Edition, for 1987.
574# Rules prior to 1987 are unknown.
575# The comments in the OAG say "Only Ensenada, Mexicale, San Felipe and Tijuana
576# observe DST." This is presumably Baja California Norte, above 28th parallel,
577# as listed there; Mexico/BajaSur is for "Baja California Sur and N. Pacific
578# Coast (States of Sinaloa and Sonora)."
579
580# From Bob Devine (January 28, 1988):
581# The Federal District (where Mexico City is) has observed [DST] several
582# times but not recently.
583#
584# I don't where to drawn the line in the North Baja area. 28th latitude
585# sounds good -- but it may be higher (how far [d]o radio stations from
586# San Diego affect culture?).
587#
588# The dates of DST probably go back to 1981. The rules are the same as
589# US's. This is going to be a headache for US presidential electi[o]n years!
590
591# From Arthur David Olson (February 13, 1988)
592# Since the 1981 starting date is only "probable," we'll keep the 1987
593# starting date below.
594
595# From U. S. Naval Observatory (January 19, 1989):
596# MEXICO BAJA CAL N 7 H BEHIND UTC BAJA CALIFORNIA SUR AND
597# MEXICO BAJA CAL N N. PACIFIC COAST (STATES
598# MEXICO BAJA CAL N OF SINALOA AND SONORA)
599# MEXICO BAJA CAL N 8 H BEHIND UTC ABOVE 28TH PARALLAL APR 3
600# MEXICO BAJA CAL N - OCT 29
601# MEXICO BAJA CAL N 7 H BEHIND UTC ABOVE 28TH PARALLAL APR 3
602# MEXICO BAJA CAL N - 0CT 29
603# MEXICO 6 H BEHIND UTC STATES OF DURANGO,
604# MEXICO COAHUILA, NUEVO LEON,
605# MEXICO TAMAULIPAS
606# MEXICO 5 H BEHIND UTC STATES OF DURANGO,
607# MEXICO COAHUILA, NUEVO LEON,
608# MEXICO TAMAULIPAS APR 3 - OCT 29
609# MEXICO 6 H BEHIND UTC GENERAL MEXICO, STATES OF
610# MEXICO CAMPECHE, QUINTANA ROO AND
611# MEXICO YUCATAN
612
613# From Arthur David Olson (January 21, 1989):
614# April 3 fell on a Sunday in 1988; October 29 fell on a Sunday in 1989. Ahem.
615# USNO claims there should be four Mexican zones rather than three:
616# a zone that's GMT-8 with DST; a zone that's always GMT-7;
617# a zone that's GMT-6 with DST; and a zone that's always GMT-6.
618
619# From Paul Eggert <eggert@twinsun.com> (November 18, 1993):
620# Shanks also says there are four zones, but disagrees about the fourth.
621# Instead of GMT-6 with DST, he says there's GMT-8 without DST.
622
623# From Shanks (1991):
624# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
625Rule Mexico 1922 only - Jan 1 0:00 0 S
626Rule Mexico 1939 only - Feb 5 0:00 1:00 D
627Rule Mexico 1939 only - Jun 25 0:00 0 S
628Rule Mexico 1940 only - Dec 9 0:00 1:00 D
629Rule Mexico 1941 only - Apr 1 0:00 0 S
630Rule Mexico 1943 only - Dec 16 0:00 1:00 D
631Rule Mexico 1944 only - May 1 0:00 0 S
632Rule Mexico 1950 only - Feb 12 0:00 1:00 D
633Rule Mexico 1950 only - Jul 30 0:00 0 S
634Rule BajaN 1950 1966 - Apr lastSun 2:00 1:00 D
635Rule BajaN 1950 1961 - Sep lastSun 2:00 0 S
636Rule BajaN 1961 1966 - Oct lastSun 2:00 0 S
637# Zone NAME GMTOFF RULES FORMAT [UNTIL]
638Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24
639 -7:00 - MST 1927 Jun 10 23:00
640 -6:00 - CST 1930 Nov 15
641 -7:00 - MST 1931 May 1 23:00
642 -6:00 - CST 1931 Oct
643 -7:00 - MST 1932 Mar 30 23:00
644 -6:00 Mexico C%sT
645# ZONE-DESCR America Mexico_City Mexico Mexico City
646Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20
647 -7:00 - MST 1927 Jun 10 23:00
648 -6:00 - CST 1930 Nov 15
649 -7:00 - MST 1931 May 1 23:00
650 -6:00 - CST 1931 Oct
651 -7:00 - MST 1932 Mar 30 23:00
652 -6:00 - CST 1942 Apr
653 -7:00 - MST 1949 Jan 14
654 -8:00 - PST 1970
655 -7:00 - MST
656# ZONE-DESCR America Mazatlan Mexico Mazatlan
657Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56
658 -8:00 - PST 1927 Jun 10 23:00
659 -7:00 - MST 1930 Nov 16
660 -8:00 - PST 1942 Apr
661 -7:00 - MST 1949 Jan 14
662 -8:00 BajaN P%sT 1967 Apr lastSun 2:00
663 -8:00 US P%sT
664# ZONE-DESCR America Tijuana Mexico Baja California Norte
665Zone America/Ensenada -7:46:28 - LMT 1922 Jan 1 0:13:32
666 -8:00 - PST 1927 Jun 10 23:00
667 -7:00 - MST 1930 Nov 16
668 -8:00 - PST 1942 Apr
669 -7:00 - MST 1949 Jan 14
670 -8:00 - PST
671# ZONE-DESCR America Ensenada Mexico Ensenada
672
673#
674# Revillagigedo Is
675# no information
676
677###############################################################################
678
679# Anguilla
680# Zone NAME GMTOFF RULES FORMAT [UNTIL]
681Zone America/Anguilla -4:12:16 - LMT 1912 Mar 2
682 -4:00 - AST
683
684# ZONE-DESCR America Anguilla Anguilla All points
685
686# Antigua and Barbuda
687# Zone NAME GMTOFF RULES FORMAT [UNTIL]
688Zone America/Antigua -4:07:12 - LMT 1912 Mar 2
689 -5:00 - EST 1951
690 -4:00 - AST
691
692# ZONE-DESCR America Antigua Antigua All points
693
694# Bahamas
695# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
696Rule Bahamas 1912 only - Mar 2 0:00 0 S
697Rule Bahamas 1964 max - Oct lastSun 2:00 0 S
698Rule Bahamas 1964 1986 - Apr lastSun 2:00 1:00 D
699Rule Bahamas 1987 max - Apr Sun>=1 2:00 1:00 D
700# Zone NAME GMTOFF RULES FORMAT [UNTIL]
701Zone America/Nassau -5:09:24 - LMT 1912 Mar 2
702 -5:00 Bahamas E%sT
703
704# ZONE-DESCR America Nassau Bahamas All points
705
706# Barbados
707# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
708Rule Barb 1932 only - Jan 1 0:00 0 S
709Rule Barb 1977 only - Jun 12 2:00 1:00 D
710Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S
711Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D
712Rule Barb 1979 only - Sep 30 2:00 0 S
713Rule Barb 1980 only - Sep 25 2:00 0 S
714# Zone NAME GMTOFF RULES FORMAT [UNTIL]
715Zone America/Barbados -3:58:28 - LMT 1924 # Bridgetown
716 -3:58 - BMT 1932 # Bridgetown Mean Time
717 -4:00 Barb A%sT
718
719# ZONE-DESCR America Barbados Barbados All points
720
721# Belize
722# Whitman entirely disagrees with Shanks; go with Shanks.
723# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
724Rule Belize 1912 only - Apr 1 0:00 0 S
725Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD
726Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S
727Rule Belize 1973 only - Dec 5 0:00 1:00 D
728Rule Belize 1974 only - Feb 9 0:00 0 S
729Rule Belize 1982 only - Dec 18 0:00 1:00 D
730Rule Belize 1983 only - Feb 12 0:00 0 S
731# Zone NAME GMTOFF RULES FORMAT [UNTIL]
732Zone America/Belize -5:52:48 - LMT 1912 Apr
733 -6:00 Belize C%sT
734
735# ZONE-DESCR America Belize Belize All points
736
737# Bermuda
738# Zone NAME GMTOFF RULES FORMAT [UNTIL]
739Zone Atlantic/Bermuda -4:19:04 - LMT 1930 Jan 1 2:00 # Hamilton
740 -4:00 - AST 1974 Apr 28 2:00
741 -4:00 Bahamas A%sT
742
743# ZONE-DESCR Atlantic Bermuda Bermuda All points
744
745# Cayman Is
746# Zone NAME GMTOFF RULES FORMAT [UNTIL]
747Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown
748 -5:07 - KMT 1912 Feb # Kingston Mean Time
749 -5:00 - EST
750
751# ZONE-DESCR America Cayman Cayman_Islands All points
752
753# Clipperton
754# no information
755
756# Costa Rica
757# Shanks gives some very odd dates for 1991, and stops there.
758# For now, we won't guess further.
759# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
760Rule CR 1921 only - Jan 15 0:00 0 S
761Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D
762Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S
763Rule CR 1991 only - Jan 19 0:00 1:00 D
764Rule CR 1991 only - Jul 1 0:00 0 S
765# There are too many San Joses elsewhere, so we'll use `Costa Rica'.
766# Zone NAME GMTOFF RULES FORMAT [UNTIL]
767Zone America/Costa_Rica -5:36:20 - LMT 1890 # San Jose
768 -5:36 - SJMT 1921 Jan 15 # San Jose Mean Time
769 -6:00 CR C%sT
770# ZONE-DESCR America Costa_Rica Costa_Rica All points
771
772# Coco
773# no information; probably like America/Costa_Rica
774
775# Cuba
776
777# From Bob Devine (January 28, 1988):
778# . . .DST is from 2nd Sunday in May to 2nd Sunday in October since 1981.
779# Change at midnight. In 1979 & 1980, started at 3rd Sunday in March
780# (I think).
781
782# From U. S. Naval Observatory (January 19, 1989):
783# CUBA 5 H BEHIND UTC
784# CUBA 4 H BEHIND UTC MAR 20 - OCT 8
785
786# From Shanks (1991):
787# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
788Rule Cuba 1925 only - Jul 19 12:00 0 S
789Rule Cuba 1928 only - Jun 10 0:00 1:00 D
790Rule Cuba 1928 only - Oct 10 0:00 0 S
791Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D
792Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S
793Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D
794Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S
795Rule Cuba 1965 only - Jun 1 0:00 1:00 D
796Rule Cuba 1965 only - Sep 30 0:00 0 S
797Rule Cuba 1966 only - May 29 0:00 1:00 D
798Rule Cuba 1966 only - Oct 2 0:00 0 S
799Rule Cuba 1967 only - Apr 8 0:00 1:00 D
800Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S
801Rule Cuba 1968 only - Apr 14 0:00 1:00 D
802Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D
803Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S
804Rule Cuba 1972 1974 - Oct 8 0:00 0 S
805Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S
806Rule Cuba 1978 only - May 7 0:00 1:00 D
807Rule Cuba 1978 1980 - Oct Sun>=8 0:00 0 S
808Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D
809Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D
810Rule Cuba 1981 max - Oct Sun>=8 0:00 0 S
811Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D
812Rule Cuba 1990 only - Apr 1 0:00 1:00 D
813Rule Cuba 1991 max - Mar Sun>=14 0:00 1:00 D
814
815# Zone NAME GMTOFF RULES FORMAT [UNTIL]
816Zone America/Havana -5:29:28 - LMT 1890
817 -5:30 - HMT 1925 Jul 19 12:00 # Havana MT
818 -5:00 Cuba C%sT
819
820# ZONE-DESCR America Havana Cuba All points
821
822# Dominica
823# Zone NAME GMTOFF RULES FORMAT [UNTIL]
824Zone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau
825 -4:00 - AST
826
827# ZONE-DESCR America Dominica Dominica All points
828
829# Dominican Republic
830# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
831Rule DR 1933 only - Apr 1 12:00 0 S
832Rule DR 1966 only - Oct 30 0:00 1:00 D
833Rule DR 1967 only - Feb 28 0:00 0 S
834Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD
835Rule DR 1970 only - Feb 21 0:00 0 S
836Rule DR 1971 only - Jan 20 0:00 0 S
837Rule DR 1972 1974 - Jan 21 0:00 0 S
838# Zone NAME GMTOFF RULES FORMAT [UNTIL]
839Zone America/Santo_Domingo -4:39:36 - LMT 1890
840 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT
841 -5:00 DR E%sT 1974 Oct 27
842 -4:00 - AST
843
844# ZONE-DESCR America Santo_Domingo Dominican_Republic All points
845
846# El Salvador
847# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
848Rule Salv 1921 only - Jan 1 0:00 0 S
849Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D
850Rule Salv 1987 1988 - Sep lastSun 0:00 0 S
851# There are too many San Salvadors elsewhere, so we'll use `El Salvador'.
852# Zone NAME GMTOFF RULES FORMAT [UNTIL]
853Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador
854 -6:00 Salv C%sT
855
856# ZONE-DESCR America El_Salvador El_Salvador All points
857
858# Grenada
859# Zone NAME GMTOFF RULES FORMAT [UNTIL]
860Zone America/Grenada -4:07:00 - LMT 1911 Jul
861 -4:00 - AST
862
863# ZONE-DESCR America Grenada Grenada All points
864
865# Guadeloupe
866# Zone NAME GMTOFF RULES FORMAT [UNTIL]
867Zone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe a Pitre
868 -4:00 - AST
869
870# ZONE-DESCR America Guadeloupe Guadeloupe All points
871
872# Guatemala
873# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
874Rule Guat 1918 only - Oct 5 0:00 0 S
875Rule Guat 1973 only - Nov 25 0:00 1:00 D
876Rule Guat 1974 only - Feb 24 0:00 0 S
877Rule Guat 1983 only - May 21 0:00 1:00 D
878Rule Guat 1983 only - Sep 22 0:00 0 S
879# Zone NAME GMTOFF RULES FORMAT [UNTIL]
880Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5
881 -6:00 Guat C%sT
882
883# ZONE-DESCR America Guatemala Guatemala All points
884
885# Haiti
886# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
887Rule Haiti 1917 only - Jan 24 12:00 0 S
888Rule Haiti 1983 only - May 8 0:00 1:00 D
889Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D
890Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S
891Rule Haiti 1988 max - Apr Sun>=1 2:00 1:00 D
892Rule Haiti 1988 max - Oct lastSun 2:00 0 S
893# Zone NAME GMTOFF RULES FORMAT [UNTIL]
894Zone America/Port-au-Prince -4:49:20 - LMT 1890
895 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT
896 -5:00 Haiti E%sT
897
898# ZONE-DESCR America Port-au-Prince Haiti All points
899
900# Honduras
901# Shanks says 1921 Jan 1; go with Whitman's more precise Apr 1.
902# Zone NAME GMTOFF RULES FORMAT [UNTIL]
903Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr
904 -6:00 Salv C%sT
905
906# ZONE-DESCR America Tegucigalpa Honduras All points
907
908# Jamaica
909
910# From Bob Devine (January 28, 1988):
911# Follows US rules.
912
913# From U. S. Naval Observatory (January 19, 1989):
914# JAMAICA 5 H BEHIND UTC
915
916# From Shanks (1991):
917# Zone NAME GMTOFF RULES FORMAT [UNTIL]
918Zone America/Jamaica -5:07:12 - LMT 1890 # Kingston
919 -5:07 - KMT 1912 Feb # Kingston Mean Time
920 -5:00 - EST 1974 Jan 6 2:00
921 -5:00 US E%sT
922
923# ZONE-DESCR America Jamaica Jamaica All points
924
925# Martinique
926# Zone NAME GMTOFF RULES FORMAT [UNTIL]
927Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France
928 -4:04 - FFMT 1911 May # Fort-de-France MT
929 -4:00 - AST 1980 Apr 6
930 -4:00 1:00 ADT 1980 Sep 28
931 -4:00 - AST
932
933# ZONE-DESCR America Martinique Martinique All points
934
935# Montserrat
936# Zone NAME GMTOFF RULES FORMAT [UNTIL]
937Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Plymouth
938 -4:00 - AST
939
940# ZONE-DESCR America Montserrat Montserrat All points
941
942# Nicaragua
943# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
944Rule Nic 1975 only - Feb 16 0:00 0 S
945Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D
946Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S
947# Zone NAME GMTOFF RULES FORMAT [UNTIL]
948Zone America/Managua -5:45:08 - LMT 1890
949 -5:45 - MMT 1934 Jun 23 # Managua Mean Time
950 -6:00 - CST 1973 May
951 -5:00 - EST 1975 Feb 16
952 -6:00 Nic C%sT
953
954# ZONE-DESCR America Managua Nicaragua All points
955
956# Panama
957# Zone NAME GMTOFF RULES FORMAT [UNTIL]
958Zone America/Panama -5:18:08 - LMT 1890
959 -5:20 - PMT 1908 Apr 22 # Panama Mean Time
960 -5:00 - EST
961
962# ZONE-DESCR America Panama Panama All points
963
964# Puerto Rico
965# There are too many San Juans elsewhere, so we'll use `Puerto_Rico'.
966# Zone NAME GMTOFF RULES FORMAT [UNTIL]
967Zone America/Puerto_Rico -4:24:28 - LMT 1899 Mar 28 12:00 # San Juan
968 -4:00 - AST 1942 May 3
969 -4:00 1:00 ADT 1945 Sep 30 2:00
970 -4:00 - AST
971
972# ZONE-DESCR America Puerto_Rico United_States Puerto Rico
973
974# St Kitts-Nevis
975# Zone NAME GMTOFF RULES FORMAT [UNTIL]
976Zone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre
977 -4:00 - AST
978
979# ZONE-DESCR America St_Kitts St_Kitts_and_Nevis All points
980
981# St Lucia
982# Zone NAME GMTOFF RULES FORMAT [UNTIL]
983Zone America/St_Lucia -4:04:00 - LMT 1890 # Castries
984 -4:04 - CMT 1912 # Castries Mean Time
985 -4:00 - AST
986
987# ZONE-DESCR America St_Lucia St_Lucia All points
988
989# St Pierre and Miquelon
990# There are too many St Pierres elsewhere, so we'll use `Miquelon'.
991# Zone NAME GMTOFF RULES FORMAT [UNTIL]
992Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre
993 -4:00 - AST 1980 May
994 -3:00 Mont SP%sT
995
996# ZONE-DESCR America Miquelon France St. Pierre and Miquelon
997
998# St Vincent and the Grenadines
999# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1000Zone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown
1001 -4:05 - KMT 1912 # Kingstown Mean Time
1002 -4:00 - AST
1003
1004# ZONE-DESCR America St_Vincent St_Vincent All points
1005
1006# Turks and Caicos
1007# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1008Zone America/Grand_Turk -4:44:32 - LMT 1890
1009 -5:07 - KMT 1912 Feb # Kingston Mean Time
1010 -5:00 - EST 1979 Apr 29 2:00
1011 -5:00 US E%sT
1012
1013# ZONE-DESCR America Grand_Turk Turks_and_Caicos All points
1014
1015# Virgin Is (British and US)
1016# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1017Zone America/Virgin -4:19:44 - LMT 1911 Jul # Charlotte Amalie
1018 -4:00 - AST
1019
1020# ZONE-DESCR America Virgin United_States US Virgin Islands
1021# ZONE-DESCR America virgin United_Kingdom British Virgin Islands
| 352# From Shanks (1991):
353# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
354Rule StJohns 1884 only - Jan 1 0:00 0 S
355Rule StJohns 1917 1918 - Apr Sun>=8 2:00 1:00 D
356Rule StJohns 1917 only - Sep 17 2:00 0 S
357Rule StJohns 1918 only - Oct 31 2:00 0 S
358# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks.
359Rule StJohns 1919 only - May 5 23:00 1:00 D
360Rule StJohns 1919 only - Aug 12 23:00 0 S
361# For 1931-1935 Whitman gives Apr same date; go with Shanks.
362Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D
363Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S
364# For 1936-1941 Shanks gives May Mon>=9 and Oct Mon>=2; go with Whitman.
365Rule StJohns 1936 1941 - May Sun>=8 0:00 1:00 D
366Rule StJohns 1936 1941 - Oct Sun>=1 0:00 0 S
367# Shanks gives 1942 May 11 - 1945 Sep 30; go with Whitman.
368Rule StJohns 1942 only - Mar 1 0:00 1:00 D
369Rule StJohns 1942 only - Dec 31 0:00 0 S
370Rule StJohns 1943 only - May 30 0:00 1:00 D
371Rule StJohns 1943 only - Sep 5 0:00 0 S
372Rule StJohns 1944 only - Jul 10 0:00 1:00 D
373Rule StJohns 1944 only - Sep 2 0:00 0 S
374Rule StJohns 1945 only - Jan 1 0:00 1:00 D
375Rule StJohns 1945 only - Oct 7 2:00 0 S
376# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives
377# Apr 30 - Sep 24; go with Shanks.
378Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D
379Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S
380Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D
381Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S
382Rule StJohns 1960 max - Oct lastSun 2:00 0 S
383Rule StJohns 1987 only - Apr Sun>=1 2:00 1:00 D
384Rule StJohns 1988 only - Apr Sun>=1 2:00 2:00 D
385Rule StJohns 1989 max - Apr Sun>=1 2:00 1:00 D
386# St John's has an apostrophe, but Posix file names can't have apostrophes.
387# Zone NAME GMTOFF RULES FORMAT [UNTIL]
388Zone America/St_Johns -3:30:52 - LMT 1884
389 -3:31 StJohns N%sT 1935 Mar 30
390 -3:30 StJohns N%sT
391
392# ZONE-DESCR America St_Johns Canada Newfoundland
393
394# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
395Rule Halifax 1902 only - Jun 15 0:00 0 S
396Rule Halifax 1916 only - Apr 1 0:00 1:00 D
397Rule Halifax 1916 only - Oct 1 0:00 0 S
398Rule Halifax 1918 only - Apr 14 2:00 1:00 D
399Rule Halifax 1918 only - Oct 31 2:00 0 S
400Rule Halifax 1920 only - May 9 0:00 1:00 D
401Rule Halifax 1920 only - Aug 29 0:00 0 S
402Rule Halifax 1921 only - May 6 0:00 1:00 D
403Rule Halifax 1921 1922 - Sep 5 0:00 0 S
404Rule Halifax 1922 only - Apr 30 0:00 1:00 D
405Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D
406Rule Halifax 1923 only - Sep 4 0:00 0 S
407Rule Halifax 1924 only - Sep 15 0:00 0 S
408Rule Halifax 1925 only - Sep 28 0:00 0 S
409Rule Halifax 1926 only - May 16 0:00 1:00 D
410Rule Halifax 1926 only - Sep 13 0:00 0 S
411Rule Halifax 1927 only - May 1 0:00 1:00 D
412Rule Halifax 1927 only - Sep 26 0:00 0 S
413Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D
414Rule Halifax 1928 only - Sep 9 0:00 0 S
415Rule Halifax 1929 only - Sep 3 0:00 0 S
416Rule Halifax 1930 only - Sep 15 0:00 0 S
417Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S
418Rule Halifax 1933 only - Apr 30 0:00 1:00 D
419Rule Halifax 1933 only - Oct 2 0:00 0 S
420Rule Halifax 1934 only - May 20 0:00 1:00 D
421Rule Halifax 1934 only - Sep 16 0:00 0 S
422Rule Halifax 1935 only - Jun 2 0:00 1:00 D
423Rule Halifax 1935 only - Sep 30 0:00 0 S
424Rule Halifax 1936 only - Jun 1 0:00 1:00 D
425Rule Halifax 1936 only - Sep 14 0:00 0 S
426Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D
427Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S
428Rule Halifax 1939 only - May 28 0:00 1:00 D
429Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D
430Rule Halifax 1942 only - Feb 9 2:00 1:00 D
431Rule Halifax 1945 1959 - Sep lastSun 2:00 0 S
432Rule Halifax 1946 1959 - Apr lastSun 2:00 1:00 D
433Rule Halifax 1962 1986 - Apr lastSun 2:00 1:00 D
434Rule Halifax 1962 max - Oct lastSun 2:00 0 S
435Rule Halifax 1987 max - Apr Sun>=1 2:00 1:00 D
436# Zone NAME GMTOFF RULES FORMAT [UNTIL]
437Zone America/Halifax -4:14:24 - LMT 1902 Jun 15
438 -4:00 Halifax A%sT
439
440# ZONE-DESCR America Halifax Canada Atlantic time
441
442# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
443Rule Mont 1884 only - Jan 1 0:00 0 S
444Rule Mont 1917 only - Mar 25 2:00 1:00 D
445Rule Mont 1917 only - Apr 24 0:00 0 S
446Rule Mont 1918 only - Apr 14 2:00 1:00 D
447Rule Mont 1918 only - Oct 31 2:00 0 S
448Rule Mont 1919 only - Mar 31 2:30 1:00 D
449Rule Mont 1919 only - Oct 25 2:30 0 S
450Rule Mont 1920 only - May 2 2:30 1:00 D
451Rule Mont 1920 only - Oct 3 2:30 0 S
452Rule Mont 1921 only - May 1 2:00 1:00 D
453Rule Mont 1921 only - Oct 2 2:30 0 S
454Rule Mont 1922 only - Apr 30 2:00 1:00 D
455Rule Mont 1922 only - Oct 1 2:30 0 S
456Rule Mont 1924 only - May 17 2:00 1:00 D
457Rule Mont 1924 1926 - Sep lastSun 2:30 0 S
458Rule Mont 1925 1926 - May Sun>=1 2:00 1:00 D
459Rule Mont 1927 only - May 1 0:00 1:00 D
460Rule Mont 1927 1932 - Sep Sun>=25 0:00 0 S
461Rule Mont 1928 1931 - Apr Sun>=25 0:00 1:00 D
462Rule Mont 1932 only - May 1 0:00 1:00 D
463Rule Mont 1933 1940 - Apr Sun>=24 0:00 1:00 D
464Rule Mont 1933 only - Oct 1 0:00 0 S
465Rule Mont 1934 1939 - Sep Sun>=24 0:00 0 S
466Rule Mont 1945 1948 - Sep lastSun 2:00 0 S
467Rule Mont 1946 1986 - Apr lastSun 2:00 1:00 D
468Rule Mont 1949 1950 - Oct lastSun 2:00 0 S
469Rule Mont 1951 1956 - Sep lastSun 2:00 0 S
470Rule Mont 1957 max - Oct lastSun 2:00 0 S
471Rule Mont 1987 max - Apr Sun>=1 2:00 1:00 D
472# Zone NAME GMTOFF RULES FORMAT [UNTIL]
473Zone America/Montreal -4:54:16 - LMT 1884
474 -5:00 Mont E%sT
475
476# ZONE-DESCR America Montreal Canada Eastern time
477
478# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
479Rule Winn 1887 only - Jul 16 0:00 0 S
480Rule Winn 1916 only - Apr 23 0:00 1:00 D
481Rule Winn 1916 only - Sep 17 0:00 0 S
482Rule Winn 1918 only - Apr 14 2:00 1:00 D
483Rule Winn 1918 only - Oct 31 2:00 0 S
484Rule Winn 1937 only - May 16 2:00 1:00 D
485Rule Winn 1937 only - Sep 23 2:00 0 S
486Rule Winn 1942 only - Feb 9 2:00 1:00 D
487Rule Winn 1945 only - Sep lastSun 2:00 0 S
488Rule Winn 1946 only - May 12 2:00 1:00 D
489Rule Winn 1946 only - Oct 13 2:00 0 S
490Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D
491Rule Winn 1947 1958 - Sep lastSun 2:00 0 S
492Rule Winn 1948 only - May 1 2:00 1:00 D
493Rule Winn 1948 1960 - Apr lastSun 2:00 1:00 D
494Rule Winn 1959 only - Oct lastSun 2:00 0 S
495Rule Winn 1960 only - Sep lastSun 2:00 0 S
496Rule Winn 1963 only - Apr lastSun 2:00 1:00 D
497Rule Winn 1963 only - Sep lastSun 2:00 0 S
498Rule Winn 1966 1986 - Apr lastSun 2:00 1:00 D
499Rule Winn 1966 max - Sep lastSun 2:00 0 S
500Rule Winn 1987 max - Apr Sun>=1 2:00 1:00 D
501# Zone NAME GMTOFF RULES FORMAT [UNTIL]
502Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16
503 -6:00 Winn C%sT
504
505# ZONE-DESCR America Winnipeg Canada Manitoba
506
507# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
508Rule Regina 1905 only - Sep 1 0:00 0 S
509Rule Regina 1918 only - Apr 14 2:00 1:00 D
510Rule Regina 1918 only - Oct 31 2:00 0 S
511Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D
512Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S
513Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D
514Rule Regina 1937 only - Oct Sun>=8 0:00 0 S
515Rule Regina 1938 only - Oct Sun>=1 0:00 0 S
516Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S
517Rule Regina 1942 only - Feb 9 2:00 1:00 D
518Rule Regina 1945 only - Sep lastSun 2:00 0 S
519Rule Regina 1946 only - Apr 14 2:00 1:00 D
520Rule Regina 1946 only - Oct 13 2:00 0 S
521Rule Regina 1947 1960 - Apr lastSun 2:00 1:00 D
522Rule Regina 1947 1959 - Sep lastSun 2:00 0 S
523# Zone NAME GMTOFF RULES FORMAT [UNTIL]
524Zone America/Regina -6:58:36 - LMT 1905 Sep
525 -7:00 Regina M%sT 1966 Apr 15
526 -6:00 - CST
527
528# ZONE-DESCR America Regina Canada Saskatchewan
529
530# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
531Rule Edm 1906 only - Sep 1 0:00 0 S
532Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D
533Rule Edm 1918 only - Oct 31 2:00 0 S
534Rule Edm 1919 only - May 27 2:00 0 S
535Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D
536Rule Edm 1920 only - Oct lastSun 2:00 0 S
537Rule Edm 1921 1923 - Sep lastSun 2:00 0 S
538Rule Edm 1942 only - Feb 9 2:00 1:00 D
539Rule Edm 1945 only - Sep lastSun 2:00 0 S
540Rule Edm 1947 only - Apr lastSun 2:00 1:00 D
541Rule Edm 1947 only - Sep lastSun 2:00 0 S
542Rule Edm 1967 only - Apr lastSun 2:00 1:00 D
543Rule Edm 1967 only - Oct lastSun 2:00 0 S
544Rule Edm 1969 only - Apr lastSun 2:00 1:00 D
545Rule Edm 1969 only - Oct lastSun 2:00 0 S
546Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D
547Rule Edm 1972 max - Oct lastSun 2:00 0 S
548Rule Edm 1987 max - Apr Sun>=1 2:00 1:00 D
549# Zone NAME GMTOFF RULES FORMAT [UNTIL]
550Zone America/Edmonton -7:33:52 - LMT 1906 Sep
551 -7:00 Edm M%sT
552
553# ZONE-DESCR America Edmonton Canada Alberta
554
555# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
556Rule Vanc 1884 only - Jan 1 0:00 0 S
557Rule Vanc 1918 only - Apr 14 2:00 1:00 D
558Rule Vanc 1918 only - Oct 31 2:00 0 S
559Rule Vanc 1942 only - Feb 9 2:00 1:00 D
560Rule Vanc 1945 only - Sep 30 2:00 0 S
561Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D
562Rule Vanc 1946 only - Oct 13 2:00 0 S
563Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S
564Rule Vanc 1962 max - Oct lastSun 2:00 0 S
565Rule Vanc 1987 max - Apr Sun>=1 2:00 1:00 D
566# Zone NAME GMTOFF RULES FORMAT [UNTIL]
567Zone America/Vancouver -8:12:28 - LMT 1884
568 -8:00 Vanc P%sT
569
570# ZONE-DESCR America Vancouver Canada British Columbia
571
572# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
573Rule Yukon 1900 only - Jan 1 0:00 0 S
574Rule Yukon 1918 only - Apr 14 2:00 1:00 D
575Rule Yukon 1918 only - Oct 27 2:00 0 S
576Rule Yukon 1919 only - May 25 2:00 1:00 D
577Rule Yukon 1919 only - Nov 1 0:00 0 S
578Rule Yukon 1942 only - Feb 9 2:00 1:00 D
579Rule Yukon 1965 only - Apr 25 0:00 1:00 D
580Rule Yukon 1965 only - Oct 31 2:00 0 S
581Rule Yukon 1980 1986 - Apr lastSun 2:00 1:00 D
582Rule Yukon 1980 max - Oct lastSun 2:00 0 S
583Rule Yukon 1987 max - Apr Sun>=1 2:00 1:00 D
584# Zone NAME GMTOFF RULES FORMAT [UNTIL]
585Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20
586 -9:00 Yukon Y%sT 1966 Jul
587 -8:00 Yukon P%sT
588# Parts of Yukon (e.g. Dawson) didn't switch to -8:00 until 1973 Oct 28.
589
590# ZONE-DESCR America Whitehorse Canada Yukon Territory
591
592###############################################################################
593
594# Mexico
595
596# From Guy Harris:
597# Rules are from the Official Airline Guide, Worldwide Edition, for 1987.
598# Rules prior to 1987 are unknown.
599# The comments in the OAG say "Only Ensenada, Mexicale, San Felipe and Tijuana
600# observe DST." This is presumably Baja California Norte, above 28th parallel,
601# as listed there; Mexico/BajaSur is for "Baja California Sur and N. Pacific
602# Coast (States of Sinaloa and Sonora)."
603
604# From Bob Devine (January 28, 1988):
605# The Federal District (where Mexico City is) has observed [DST] several
606# times but not recently.
607#
608# I don't where to drawn the line in the North Baja area. 28th latitude
609# sounds good -- but it may be higher (how far [d]o radio stations from
610# San Diego affect culture?).
611#
612# The dates of DST probably go back to 1981. The rules are the same as
613# US's. This is going to be a headache for US presidential electi[o]n years!
614
615# From Arthur David Olson (February 13, 1988)
616# Since the 1981 starting date is only "probable," we'll keep the 1987
617# starting date below.
618
619# From U. S. Naval Observatory (January 19, 1989):
620# MEXICO BAJA CAL N 7 H BEHIND UTC BAJA CALIFORNIA SUR AND
621# MEXICO BAJA CAL N N. PACIFIC COAST (STATES
622# MEXICO BAJA CAL N OF SINALOA AND SONORA)
623# MEXICO BAJA CAL N 8 H BEHIND UTC ABOVE 28TH PARALLAL APR 3
624# MEXICO BAJA CAL N - OCT 29
625# MEXICO BAJA CAL N 7 H BEHIND UTC ABOVE 28TH PARALLAL APR 3
626# MEXICO BAJA CAL N - 0CT 29
627# MEXICO 6 H BEHIND UTC STATES OF DURANGO,
628# MEXICO COAHUILA, NUEVO LEON,
629# MEXICO TAMAULIPAS
630# MEXICO 5 H BEHIND UTC STATES OF DURANGO,
631# MEXICO COAHUILA, NUEVO LEON,
632# MEXICO TAMAULIPAS APR 3 - OCT 29
633# MEXICO 6 H BEHIND UTC GENERAL MEXICO, STATES OF
634# MEXICO CAMPECHE, QUINTANA ROO AND
635# MEXICO YUCATAN
636
637# From Arthur David Olson (January 21, 1989):
638# April 3 fell on a Sunday in 1988; October 29 fell on a Sunday in 1989. Ahem.
639# USNO claims there should be four Mexican zones rather than three:
640# a zone that's GMT-8 with DST; a zone that's always GMT-7;
641# a zone that's GMT-6 with DST; and a zone that's always GMT-6.
642
643# From Paul Eggert <eggert@twinsun.com> (November 18, 1993):
644# Shanks also says there are four zones, but disagrees about the fourth.
645# Instead of GMT-6 with DST, he says there's GMT-8 without DST.
646
647# From Shanks (1991):
648# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
649Rule Mexico 1922 only - Jan 1 0:00 0 S
650Rule Mexico 1939 only - Feb 5 0:00 1:00 D
651Rule Mexico 1939 only - Jun 25 0:00 0 S
652Rule Mexico 1940 only - Dec 9 0:00 1:00 D
653Rule Mexico 1941 only - Apr 1 0:00 0 S
654Rule Mexico 1943 only - Dec 16 0:00 1:00 D
655Rule Mexico 1944 only - May 1 0:00 0 S
656Rule Mexico 1950 only - Feb 12 0:00 1:00 D
657Rule Mexico 1950 only - Jul 30 0:00 0 S
658Rule BajaN 1950 1966 - Apr lastSun 2:00 1:00 D
659Rule BajaN 1950 1961 - Sep lastSun 2:00 0 S
660Rule BajaN 1961 1966 - Oct lastSun 2:00 0 S
661# Zone NAME GMTOFF RULES FORMAT [UNTIL]
662Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24
663 -7:00 - MST 1927 Jun 10 23:00
664 -6:00 - CST 1930 Nov 15
665 -7:00 - MST 1931 May 1 23:00
666 -6:00 - CST 1931 Oct
667 -7:00 - MST 1932 Mar 30 23:00
668 -6:00 Mexico C%sT
669# ZONE-DESCR America Mexico_City Mexico Mexico City
670Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20
671 -7:00 - MST 1927 Jun 10 23:00
672 -6:00 - CST 1930 Nov 15
673 -7:00 - MST 1931 May 1 23:00
674 -6:00 - CST 1931 Oct
675 -7:00 - MST 1932 Mar 30 23:00
676 -6:00 - CST 1942 Apr
677 -7:00 - MST 1949 Jan 14
678 -8:00 - PST 1970
679 -7:00 - MST
680# ZONE-DESCR America Mazatlan Mexico Mazatlan
681Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56
682 -8:00 - PST 1927 Jun 10 23:00
683 -7:00 - MST 1930 Nov 16
684 -8:00 - PST 1942 Apr
685 -7:00 - MST 1949 Jan 14
686 -8:00 BajaN P%sT 1967 Apr lastSun 2:00
687 -8:00 US P%sT
688# ZONE-DESCR America Tijuana Mexico Baja California Norte
689Zone America/Ensenada -7:46:28 - LMT 1922 Jan 1 0:13:32
690 -8:00 - PST 1927 Jun 10 23:00
691 -7:00 - MST 1930 Nov 16
692 -8:00 - PST 1942 Apr
693 -7:00 - MST 1949 Jan 14
694 -8:00 - PST
695# ZONE-DESCR America Ensenada Mexico Ensenada
696
697#
698# Revillagigedo Is
699# no information
700
701###############################################################################
702
703# Anguilla
704# Zone NAME GMTOFF RULES FORMAT [UNTIL]
705Zone America/Anguilla -4:12:16 - LMT 1912 Mar 2
706 -4:00 - AST
707
708# ZONE-DESCR America Anguilla Anguilla All points
709
710# Antigua and Barbuda
711# Zone NAME GMTOFF RULES FORMAT [UNTIL]
712Zone America/Antigua -4:07:12 - LMT 1912 Mar 2
713 -5:00 - EST 1951
714 -4:00 - AST
715
716# ZONE-DESCR America Antigua Antigua All points
717
718# Bahamas
719# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
720Rule Bahamas 1912 only - Mar 2 0:00 0 S
721Rule Bahamas 1964 max - Oct lastSun 2:00 0 S
722Rule Bahamas 1964 1986 - Apr lastSun 2:00 1:00 D
723Rule Bahamas 1987 max - Apr Sun>=1 2:00 1:00 D
724# Zone NAME GMTOFF RULES FORMAT [UNTIL]
725Zone America/Nassau -5:09:24 - LMT 1912 Mar 2
726 -5:00 Bahamas E%sT
727
728# ZONE-DESCR America Nassau Bahamas All points
729
730# Barbados
731# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
732Rule Barb 1932 only - Jan 1 0:00 0 S
733Rule Barb 1977 only - Jun 12 2:00 1:00 D
734Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S
735Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D
736Rule Barb 1979 only - Sep 30 2:00 0 S
737Rule Barb 1980 only - Sep 25 2:00 0 S
738# Zone NAME GMTOFF RULES FORMAT [UNTIL]
739Zone America/Barbados -3:58:28 - LMT 1924 # Bridgetown
740 -3:58 - BMT 1932 # Bridgetown Mean Time
741 -4:00 Barb A%sT
742
743# ZONE-DESCR America Barbados Barbados All points
744
745# Belize
746# Whitman entirely disagrees with Shanks; go with Shanks.
747# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
748Rule Belize 1912 only - Apr 1 0:00 0 S
749Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD
750Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S
751Rule Belize 1973 only - Dec 5 0:00 1:00 D
752Rule Belize 1974 only - Feb 9 0:00 0 S
753Rule Belize 1982 only - Dec 18 0:00 1:00 D
754Rule Belize 1983 only - Feb 12 0:00 0 S
755# Zone NAME GMTOFF RULES FORMAT [UNTIL]
756Zone America/Belize -5:52:48 - LMT 1912 Apr
757 -6:00 Belize C%sT
758
759# ZONE-DESCR America Belize Belize All points
760
761# Bermuda
762# Zone NAME GMTOFF RULES FORMAT [UNTIL]
763Zone Atlantic/Bermuda -4:19:04 - LMT 1930 Jan 1 2:00 # Hamilton
764 -4:00 - AST 1974 Apr 28 2:00
765 -4:00 Bahamas A%sT
766
767# ZONE-DESCR Atlantic Bermuda Bermuda All points
768
769# Cayman Is
770# Zone NAME GMTOFF RULES FORMAT [UNTIL]
771Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown
772 -5:07 - KMT 1912 Feb # Kingston Mean Time
773 -5:00 - EST
774
775# ZONE-DESCR America Cayman Cayman_Islands All points
776
777# Clipperton
778# no information
779
780# Costa Rica
781# Shanks gives some very odd dates for 1991, and stops there.
782# For now, we won't guess further.
783# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
784Rule CR 1921 only - Jan 15 0:00 0 S
785Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D
786Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S
787Rule CR 1991 only - Jan 19 0:00 1:00 D
788Rule CR 1991 only - Jul 1 0:00 0 S
789# There are too many San Joses elsewhere, so we'll use `Costa Rica'.
790# Zone NAME GMTOFF RULES FORMAT [UNTIL]
791Zone America/Costa_Rica -5:36:20 - LMT 1890 # San Jose
792 -5:36 - SJMT 1921 Jan 15 # San Jose Mean Time
793 -6:00 CR C%sT
794# ZONE-DESCR America Costa_Rica Costa_Rica All points
795
796# Coco
797# no information; probably like America/Costa_Rica
798
799# Cuba
800
801# From Bob Devine (January 28, 1988):
802# . . .DST is from 2nd Sunday in May to 2nd Sunday in October since 1981.
803# Change at midnight. In 1979 & 1980, started at 3rd Sunday in March
804# (I think).
805
806# From U. S. Naval Observatory (January 19, 1989):
807# CUBA 5 H BEHIND UTC
808# CUBA 4 H BEHIND UTC MAR 20 - OCT 8
809
810# From Shanks (1991):
811# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
812Rule Cuba 1925 only - Jul 19 12:00 0 S
813Rule Cuba 1928 only - Jun 10 0:00 1:00 D
814Rule Cuba 1928 only - Oct 10 0:00 0 S
815Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D
816Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S
817Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D
818Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S
819Rule Cuba 1965 only - Jun 1 0:00 1:00 D
820Rule Cuba 1965 only - Sep 30 0:00 0 S
821Rule Cuba 1966 only - May 29 0:00 1:00 D
822Rule Cuba 1966 only - Oct 2 0:00 0 S
823Rule Cuba 1967 only - Apr 8 0:00 1:00 D
824Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S
825Rule Cuba 1968 only - Apr 14 0:00 1:00 D
826Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D
827Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S
828Rule Cuba 1972 1974 - Oct 8 0:00 0 S
829Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S
830Rule Cuba 1978 only - May 7 0:00 1:00 D
831Rule Cuba 1978 1980 - Oct Sun>=8 0:00 0 S
832Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D
833Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D
834Rule Cuba 1981 max - Oct Sun>=8 0:00 0 S
835Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D
836Rule Cuba 1990 only - Apr 1 0:00 1:00 D
837Rule Cuba 1991 max - Mar Sun>=14 0:00 1:00 D
838
839# Zone NAME GMTOFF RULES FORMAT [UNTIL]
840Zone America/Havana -5:29:28 - LMT 1890
841 -5:30 - HMT 1925 Jul 19 12:00 # Havana MT
842 -5:00 Cuba C%sT
843
844# ZONE-DESCR America Havana Cuba All points
845
846# Dominica
847# Zone NAME GMTOFF RULES FORMAT [UNTIL]
848Zone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau
849 -4:00 - AST
850
851# ZONE-DESCR America Dominica Dominica All points
852
853# Dominican Republic
854# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
855Rule DR 1933 only - Apr 1 12:00 0 S
856Rule DR 1966 only - Oct 30 0:00 1:00 D
857Rule DR 1967 only - Feb 28 0:00 0 S
858Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD
859Rule DR 1970 only - Feb 21 0:00 0 S
860Rule DR 1971 only - Jan 20 0:00 0 S
861Rule DR 1972 1974 - Jan 21 0:00 0 S
862# Zone NAME GMTOFF RULES FORMAT [UNTIL]
863Zone America/Santo_Domingo -4:39:36 - LMT 1890
864 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT
865 -5:00 DR E%sT 1974 Oct 27
866 -4:00 - AST
867
868# ZONE-DESCR America Santo_Domingo Dominican_Republic All points
869
870# El Salvador
871# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
872Rule Salv 1921 only - Jan 1 0:00 0 S
873Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D
874Rule Salv 1987 1988 - Sep lastSun 0:00 0 S
875# There are too many San Salvadors elsewhere, so we'll use `El Salvador'.
876# Zone NAME GMTOFF RULES FORMAT [UNTIL]
877Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador
878 -6:00 Salv C%sT
879
880# ZONE-DESCR America El_Salvador El_Salvador All points
881
882# Grenada
883# Zone NAME GMTOFF RULES FORMAT [UNTIL]
884Zone America/Grenada -4:07:00 - LMT 1911 Jul
885 -4:00 - AST
886
887# ZONE-DESCR America Grenada Grenada All points
888
889# Guadeloupe
890# Zone NAME GMTOFF RULES FORMAT [UNTIL]
891Zone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe a Pitre
892 -4:00 - AST
893
894# ZONE-DESCR America Guadeloupe Guadeloupe All points
895
896# Guatemala
897# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
898Rule Guat 1918 only - Oct 5 0:00 0 S
899Rule Guat 1973 only - Nov 25 0:00 1:00 D
900Rule Guat 1974 only - Feb 24 0:00 0 S
901Rule Guat 1983 only - May 21 0:00 1:00 D
902Rule Guat 1983 only - Sep 22 0:00 0 S
903# Zone NAME GMTOFF RULES FORMAT [UNTIL]
904Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5
905 -6:00 Guat C%sT
906
907# ZONE-DESCR America Guatemala Guatemala All points
908
909# Haiti
910# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
911Rule Haiti 1917 only - Jan 24 12:00 0 S
912Rule Haiti 1983 only - May 8 0:00 1:00 D
913Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D
914Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S
915Rule Haiti 1988 max - Apr Sun>=1 2:00 1:00 D
916Rule Haiti 1988 max - Oct lastSun 2:00 0 S
917# Zone NAME GMTOFF RULES FORMAT [UNTIL]
918Zone America/Port-au-Prince -4:49:20 - LMT 1890
919 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT
920 -5:00 Haiti E%sT
921
922# ZONE-DESCR America Port-au-Prince Haiti All points
923
924# Honduras
925# Shanks says 1921 Jan 1; go with Whitman's more precise Apr 1.
926# Zone NAME GMTOFF RULES FORMAT [UNTIL]
927Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr
928 -6:00 Salv C%sT
929
930# ZONE-DESCR America Tegucigalpa Honduras All points
931
932# Jamaica
933
934# From Bob Devine (January 28, 1988):
935# Follows US rules.
936
937# From U. S. Naval Observatory (January 19, 1989):
938# JAMAICA 5 H BEHIND UTC
939
940# From Shanks (1991):
941# Zone NAME GMTOFF RULES FORMAT [UNTIL]
942Zone America/Jamaica -5:07:12 - LMT 1890 # Kingston
943 -5:07 - KMT 1912 Feb # Kingston Mean Time
944 -5:00 - EST 1974 Jan 6 2:00
945 -5:00 US E%sT
946
947# ZONE-DESCR America Jamaica Jamaica All points
948
949# Martinique
950# Zone NAME GMTOFF RULES FORMAT [UNTIL]
951Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France
952 -4:04 - FFMT 1911 May # Fort-de-France MT
953 -4:00 - AST 1980 Apr 6
954 -4:00 1:00 ADT 1980 Sep 28
955 -4:00 - AST
956
957# ZONE-DESCR America Martinique Martinique All points
958
959# Montserrat
960# Zone NAME GMTOFF RULES FORMAT [UNTIL]
961Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Plymouth
962 -4:00 - AST
963
964# ZONE-DESCR America Montserrat Montserrat All points
965
966# Nicaragua
967# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
968Rule Nic 1975 only - Feb 16 0:00 0 S
969Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D
970Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S
971# Zone NAME GMTOFF RULES FORMAT [UNTIL]
972Zone America/Managua -5:45:08 - LMT 1890
973 -5:45 - MMT 1934 Jun 23 # Managua Mean Time
974 -6:00 - CST 1973 May
975 -5:00 - EST 1975 Feb 16
976 -6:00 Nic C%sT
977
978# ZONE-DESCR America Managua Nicaragua All points
979
980# Panama
981# Zone NAME GMTOFF RULES FORMAT [UNTIL]
982Zone America/Panama -5:18:08 - LMT 1890
983 -5:20 - PMT 1908 Apr 22 # Panama Mean Time
984 -5:00 - EST
985
986# ZONE-DESCR America Panama Panama All points
987
988# Puerto Rico
989# There are too many San Juans elsewhere, so we'll use `Puerto_Rico'.
990# Zone NAME GMTOFF RULES FORMAT [UNTIL]
991Zone America/Puerto_Rico -4:24:28 - LMT 1899 Mar 28 12:00 # San Juan
992 -4:00 - AST 1942 May 3
993 -4:00 1:00 ADT 1945 Sep 30 2:00
994 -4:00 - AST
995
996# ZONE-DESCR America Puerto_Rico United_States Puerto Rico
997
998# St Kitts-Nevis
999# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1000Zone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre
1001 -4:00 - AST
1002
1003# ZONE-DESCR America St_Kitts St_Kitts_and_Nevis All points
1004
1005# St Lucia
1006# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1007Zone America/St_Lucia -4:04:00 - LMT 1890 # Castries
1008 -4:04 - CMT 1912 # Castries Mean Time
1009 -4:00 - AST
1010
1011# ZONE-DESCR America St_Lucia St_Lucia All points
1012
1013# St Pierre and Miquelon
1014# There are too many St Pierres elsewhere, so we'll use `Miquelon'.
1015# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1016Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre
1017 -4:00 - AST 1980 May
1018 -3:00 Mont SP%sT
1019
1020# ZONE-DESCR America Miquelon France St. Pierre and Miquelon
1021
1022# St Vincent and the Grenadines
1023# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1024Zone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown
1025 -4:05 - KMT 1912 # Kingstown Mean Time
1026 -4:00 - AST
1027
1028# ZONE-DESCR America St_Vincent St_Vincent All points
1029
1030# Turks and Caicos
1031# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1032Zone America/Grand_Turk -4:44:32 - LMT 1890
1033 -5:07 - KMT 1912 Feb # Kingston Mean Time
1034 -5:00 - EST 1979 Apr 29 2:00
1035 -5:00 US E%sT
1036
1037# ZONE-DESCR America Grand_Turk Turks_and_Caicos All points
1038
1039# Virgin Is (British and US)
1040# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1041Zone America/Virgin -4:19:44 - LMT 1911 Jul # Charlotte Amalie
1042 -4:00 - AST
1043
1044# ZONE-DESCR America Virgin United_States US Virgin Islands
1045# ZONE-DESCR America virgin United_Kingdom British Virgin Islands
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