1# @(#)northamerica 7.58
| 1# @(#)northamerica 7.60
|
2# also includes Central America and the Caribbean
3
| 2# also includes Central America and the Caribbean
3
|
4# $FreeBSD: head/share/zoneinfo/northamerica 75267 2001-04-06 16:46:52Z wollman $
| 4# $FreeBSD: head/share/zoneinfo/northamerica 86222 2001-11-09 19:17:59Z wollman $
|
5
6# This data is by no means authoritative; if you think you know better,
7# go ahead and edit the file (and please send any changes to
8# tz@elsie.nci.nih.gov for general use in the future).
9
10# From Paul Eggert <eggert@twinsun.com> (1999-03-22):
11# A reliable and entertaining source about time zones is
12# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
13
14###############################################################################
15
16# United States
17
18# From Paul Eggert (1999-03-31):
19# Howse writes (pp 121-125) that time zones were invented by
20# Professor Charles Ferdinand Dowd (1825-1904),
21# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY).
22# His pamphlet ``A System of National Time for Railroads'' (1870)
23# was the result of his proposals at the Convention of Railroad Trunk Lines
24# in New York City (1869-10). His 1870 proposal was based on Washington, DC,
25# but in 1872-05 he moved the proposed origin to Greenwich.
26# His proposal was adopted by the railroads on 1883-11-18 at 12:00,
27# and the most of the country soon followed suit.
28
29# From Paul Eggert <eggert@twinsun.com> (1995-12-19):
30# A good source for time zone historical data in the US is
31# Thomas G. Shanks, The American Atlas (5th edition),
32# San Diego: ACS Publications, Inc. (1991).
33# Make sure you have the errata sheet; the book is somewhat useless without it.
34# It is the source for the US and Puerto Rico entries below.
35
36# From Paul Eggert (2001-03-06):
37# Daylight Saving Time was first suggested as a joke by Benjamin Franklin
38# in his whimsical essay ``An Economical Project for Diminishing the Cost
39# of Light'' published in the Journal de Paris (1784-04-26).
40# Not everyone is happy with the results:
41#
42# I don't really care how time is reckoned so long as there is some
43# agreement about it, but I object to being told that I am saving
44# daylight when my reason tells me that I am doing nothing of the kind.
45# I even object to the implication that I am wasting something
46# valuable if I stay in bed after the sun has risen. As an admirer
47# of moonlight I resent the bossy insistence of those who want to
48# reduce my time for enjoying it. At the back of the Daylight Saving
49# scheme I detect the bony, blue-fingered hand of Puritanism, eager
50# to push people into bed earlier, and get them up earlier, to make
51# them healthy, wealthy and wise in spite of themselves.
52#
53# -- Robertson Davies, The Diary of Samuel Marchbanks (1947), XIX, Sunday
54#
55# For more about the first ten years of DST in the United States, see
56# Robert Garland's <a href="http://www.clpgh.org/exhibit/dst.html">
57# Ten years of daylight saving from the Pittsburgh standpoint
58# (Carnegie Library of Pittsburgh, 1927)</a>.
59#
60# Shanks says that DST was called "War Time" in the US in 1918 and 1919.
61# However, DST was imposed by the Standard Time Act of 1918, which
62# was the first nationwide legal time standard, and apparently
63# time was just called "Standard Time" or "Daylight Saving Time".
64
65# From Arthur David Olson:
66# US Daylight Saving Time ended on the last Sunday of *October* in 1974.
67# See, for example, the front page of the Saturday, 1974-10-26
68# and Sunday, 1974-10-27 editions of the Washington Post.
69
70# From Arthur David Olson:
71# Before the Uniform Time Act of 1966 took effect in 1967, observance of
72# Daylight Saving Time in the US was by local option, except during wartime.
73
74# From Arthur David Olson (2000-09-25):
75# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama.
76# In the introduction, Oboler spoke of "Eastern Peace Time."
77# An AltaVista search turned up
78# <a href="http://rowayton.org/rhs/hstaug45.html">:
79# "When the time is announced over the radio now, it is 'Eastern Peace
80# Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful."
81# </a> (August 1945) by way of confirmation.
82
83# From Joseph Gallant <notquite@hotmail.com>, citing
84# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987):
85# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set
| 5
6# This data is by no means authoritative; if you think you know better,
7# go ahead and edit the file (and please send any changes to
8# tz@elsie.nci.nih.gov for general use in the future).
9
10# From Paul Eggert <eggert@twinsun.com> (1999-03-22):
11# A reliable and entertaining source about time zones is
12# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
13
14###############################################################################
15
16# United States
17
18# From Paul Eggert (1999-03-31):
19# Howse writes (pp 121-125) that time zones were invented by
20# Professor Charles Ferdinand Dowd (1825-1904),
21# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY).
22# His pamphlet ``A System of National Time for Railroads'' (1870)
23# was the result of his proposals at the Convention of Railroad Trunk Lines
24# in New York City (1869-10). His 1870 proposal was based on Washington, DC,
25# but in 1872-05 he moved the proposed origin to Greenwich.
26# His proposal was adopted by the railroads on 1883-11-18 at 12:00,
27# and the most of the country soon followed suit.
28
29# From Paul Eggert <eggert@twinsun.com> (1995-12-19):
30# A good source for time zone historical data in the US is
31# Thomas G. Shanks, The American Atlas (5th edition),
32# San Diego: ACS Publications, Inc. (1991).
33# Make sure you have the errata sheet; the book is somewhat useless without it.
34# It is the source for the US and Puerto Rico entries below.
35
36# From Paul Eggert (2001-03-06):
37# Daylight Saving Time was first suggested as a joke by Benjamin Franklin
38# in his whimsical essay ``An Economical Project for Diminishing the Cost
39# of Light'' published in the Journal de Paris (1784-04-26).
40# Not everyone is happy with the results:
41#
42# I don't really care how time is reckoned so long as there is some
43# agreement about it, but I object to being told that I am saving
44# daylight when my reason tells me that I am doing nothing of the kind.
45# I even object to the implication that I am wasting something
46# valuable if I stay in bed after the sun has risen. As an admirer
47# of moonlight I resent the bossy insistence of those who want to
48# reduce my time for enjoying it. At the back of the Daylight Saving
49# scheme I detect the bony, blue-fingered hand of Puritanism, eager
50# to push people into bed earlier, and get them up earlier, to make
51# them healthy, wealthy and wise in spite of themselves.
52#
53# -- Robertson Davies, The Diary of Samuel Marchbanks (1947), XIX, Sunday
54#
55# For more about the first ten years of DST in the United States, see
56# Robert Garland's <a href="http://www.clpgh.org/exhibit/dst.html">
57# Ten years of daylight saving from the Pittsburgh standpoint
58# (Carnegie Library of Pittsburgh, 1927)</a>.
59#
60# Shanks says that DST was called "War Time" in the US in 1918 and 1919.
61# However, DST was imposed by the Standard Time Act of 1918, which
62# was the first nationwide legal time standard, and apparently
63# time was just called "Standard Time" or "Daylight Saving Time".
64
65# From Arthur David Olson:
66# US Daylight Saving Time ended on the last Sunday of *October* in 1974.
67# See, for example, the front page of the Saturday, 1974-10-26
68# and Sunday, 1974-10-27 editions of the Washington Post.
69
70# From Arthur David Olson:
71# Before the Uniform Time Act of 1966 took effect in 1967, observance of
72# Daylight Saving Time in the US was by local option, except during wartime.
73
74# From Arthur David Olson (2000-09-25):
75# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama.
76# In the introduction, Oboler spoke of "Eastern Peace Time."
77# An AltaVista search turned up
78# <a href="http://rowayton.org/rhs/hstaug45.html">:
79# "When the time is announced over the radio now, it is 'Eastern Peace
80# Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful."
81# </a> (August 1945) by way of confirmation.
82
83# From Joseph Gallant <notquite@hotmail.com>, citing
84# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987):
85# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set
|
86# to switch to London for Atlee's address, but the American people
| 86# to switch to London for Attlee's address, but the American people
|
87# never got to hear his speech live. According to one press account,
88# CBS' Bob Trout was first to announce the word of Japan's surrender,
89# but a few seconds later, NBC, ABC and Mutual also flashed the word
90# of surrender, all of whom interrupting the bells of Big Ben in
| 87# never got to hear his speech live. According to one press account,
88# CBS' Bob Trout was first to announce the word of Japan's surrender,
89# but a few seconds later, NBC, ABC and Mutual also flashed the word
90# of surrender, all of whom interrupting the bells of Big Ben in
|
91# London which were to precede Mr. Atlee's speech.
| 91# London which were to precede Mr. Attlee's speech.
|
92
93# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
94Rule US 1918 1919 - Mar lastSun 2:00 1:00 D
95Rule US 1918 1919 - Oct lastSun 2:00 0 S
96Rule US 1942 only - Feb 9 2:00 1:00 W # War
97Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace
98Rule US 1945 only - Sep 30 2:00 0 S
99Rule US 1967 max - Oct lastSun 2:00 0 S
100Rule US 1967 1973 - Apr lastSun 2:00 1:00 D
101Rule US 1974 only - Jan 6 2:00 1:00 D
102Rule US 1975 only - Feb 23 2:00 1:00 D
103Rule US 1976 1986 - Apr lastSun 2:00 1:00 D
104Rule US 1987 max - Apr Sun>=1 2:00 1:00 D
105# <a href="http://thomas.loc.gov/cgi-bin/bdquery/z?d106:h.r.00177:">
106# H.R.177
107# </a> (introduced 1999-01-06) would change April to March in the above rule.
108
109# From Bob Devine (1988-01-28):
110# ...Alaska (and Hawaii) had the timezone names changed in 1967.
111# old new
112# Pacific Standard Time(PST) -same-
113# Yukon Standard Time(YST) -same-
114# Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST)
115# Nome Standard Time (NT) Bering Standard Time (BST)
116#
117# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz.
118# The YST zone now covers nearly all of the state, AHST just part
119# of the Aleutian islands. No DST.
120
121# From Paul Eggert (1995-12-19):
122# The tables below use `NST', not `NT', for Nome Standard Time.
123# I invented `CAWT' for Central Alaska War Time.
124
125# From U. S. Naval Observatory (1989-01-19):
126# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON
127# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30
128# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON
129# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30
130# USA MOUNTAIN 7 H BEHIND UTC DENVER
131# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30
132# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO
133# USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30
134# USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST)
135# USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT)
136# USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W
137# USA - " - 9 H BEHIND UTC APR 3 - OCT 30
138# USA HAWAII 10 H BEHIND UTC
139# USA BERING 11 H BEHIND UTC SAMOA, MIDWAY
140
141# From Arthur David Olson (1989-01-21):
142# The above dates are for 1988.
143# Note the "AKST" and "AKDT" abbreviations, the claim that there's
144# no DST in Samoa, and the claim that there is DST in Alaska and the
145# Aleutians.
146
147# From Arthur David Olson (1988-02-13):
148# Legal standard time zone names, from United States Code (1982 Edition and
149# Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names
150# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966
151# took effect), as explained in sections 263 and 261:
152# (none)
153# United States standard eastern time
154# United States standard mountain time
155# United States standard central time
156# United States standard Pacific time
157# (none)
158# United States standard Alaska time
159# (none)
160# Next, names from 1967-04-01 until 1983-11-30 (the date for
161# public law 98-181):
162# Atlantic standard time
163# eastern standard time
164# central standard time
165# mountain standard time
166# Pacific standard time
167# Yukon standard time
168# Alaska-Hawaii standard time
169# Bering standard time
170# And after 1983-11-30:
171# Atlantic standard time
172# eastern standard time
173# central standard time
174# mountain standard time
175# Pacific standard time
176# Alaska standard time
177# Hawaii-Aleutian standard time
178# Samoa standard time
179# The law doesn't give abbreviations.
180#
181# From Paul Eggert (1995-12-19):
182# Shanks uses 1983-10-30, not 1983-11-30, for the 1983 transitions.
183# Go with Shanks.
184#
185# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow:
186# Public law 106-564 (2000-12-23) introduced the abbreviation
187# "Chamorro Standard Time" for time in Guam and the Northern Marianas.
188# See the file "australasia".
189
| 92
93# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
94Rule US 1918 1919 - Mar lastSun 2:00 1:00 D
95Rule US 1918 1919 - Oct lastSun 2:00 0 S
96Rule US 1942 only - Feb 9 2:00 1:00 W # War
97Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace
98Rule US 1945 only - Sep 30 2:00 0 S
99Rule US 1967 max - Oct lastSun 2:00 0 S
100Rule US 1967 1973 - Apr lastSun 2:00 1:00 D
101Rule US 1974 only - Jan 6 2:00 1:00 D
102Rule US 1975 only - Feb 23 2:00 1:00 D
103Rule US 1976 1986 - Apr lastSun 2:00 1:00 D
104Rule US 1987 max - Apr Sun>=1 2:00 1:00 D
105# <a href="http://thomas.loc.gov/cgi-bin/bdquery/z?d106:h.r.00177:">
106# H.R.177
107# </a> (introduced 1999-01-06) would change April to March in the above rule.
108
109# From Bob Devine (1988-01-28):
110# ...Alaska (and Hawaii) had the timezone names changed in 1967.
111# old new
112# Pacific Standard Time(PST) -same-
113# Yukon Standard Time(YST) -same-
114# Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST)
115# Nome Standard Time (NT) Bering Standard Time (BST)
116#
117# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz.
118# The YST zone now covers nearly all of the state, AHST just part
119# of the Aleutian islands. No DST.
120
121# From Paul Eggert (1995-12-19):
122# The tables below use `NST', not `NT', for Nome Standard Time.
123# I invented `CAWT' for Central Alaska War Time.
124
125# From U. S. Naval Observatory (1989-01-19):
126# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON
127# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30
128# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON
129# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30
130# USA MOUNTAIN 7 H BEHIND UTC DENVER
131# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30
132# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO
133# USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30
134# USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST)
135# USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT)
136# USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W
137# USA - " - 9 H BEHIND UTC APR 3 - OCT 30
138# USA HAWAII 10 H BEHIND UTC
139# USA BERING 11 H BEHIND UTC SAMOA, MIDWAY
140
141# From Arthur David Olson (1989-01-21):
142# The above dates are for 1988.
143# Note the "AKST" and "AKDT" abbreviations, the claim that there's
144# no DST in Samoa, and the claim that there is DST in Alaska and the
145# Aleutians.
146
147# From Arthur David Olson (1988-02-13):
148# Legal standard time zone names, from United States Code (1982 Edition and
149# Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names
150# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966
151# took effect), as explained in sections 263 and 261:
152# (none)
153# United States standard eastern time
154# United States standard mountain time
155# United States standard central time
156# United States standard Pacific time
157# (none)
158# United States standard Alaska time
159# (none)
160# Next, names from 1967-04-01 until 1983-11-30 (the date for
161# public law 98-181):
162# Atlantic standard time
163# eastern standard time
164# central standard time
165# mountain standard time
166# Pacific standard time
167# Yukon standard time
168# Alaska-Hawaii standard time
169# Bering standard time
170# And after 1983-11-30:
171# Atlantic standard time
172# eastern standard time
173# central standard time
174# mountain standard time
175# Pacific standard time
176# Alaska standard time
177# Hawaii-Aleutian standard time
178# Samoa standard time
179# The law doesn't give abbreviations.
180#
181# From Paul Eggert (1995-12-19):
182# Shanks uses 1983-10-30, not 1983-11-30, for the 1983 transitions.
183# Go with Shanks.
184#
185# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow:
186# Public law 106-564 (2000-12-23) introduced the abbreviation
187# "Chamorro Standard Time" for time in Guam and the Northern Marianas.
188# See the file "australasia".
189
|
190# From Ryan Alessi of the Thousand Oaks Star (2001-02-15) via Rives McDow:
191# Brad Sherman, D-Sherman Oaks, introduced a bill in Congress on
192# Wednesday that could have California operating on Denver time as
193# early as this summer.... The options include keeping
194# daylight-saving time all year long, or setting clocks back two hours
195# -- instead of just one -- during the existing daylight-saving time.
| 190# US eastern time, represented by New York
|
196
| 191
|
197
198# US Eastern time, represented by New York
199
| |
200# Connecticut, Delaware, District of Columbia, most of Florida,
201# Georgia, far southeastern Indiana, eastern Kentucky, Maine,
202# Maryland, Massachusetts, New Hampshire, New Jersey, New York, North
203# Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, eastern
204# Tennessee, Vermont, Virginia, West Virginia
205
206# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
207Rule NYC 1920 only - Mar lastSun 2:00 1:00 D
208Rule NYC 1920 only - Oct lastSun 2:00 0 S
209Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D
210Rule NYC 1921 1954 - Sep lastSun 2:00 0 S
211Rule NYC 1955 1966 - Oct lastSun 2:00 0 S
212# Zone NAME GMTOFF RULES FORMAT [UNTIL]
213Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:00
214 -5:00 US E%sT 1920
215 -5:00 NYC E%sT 1942
216 -5:00 US E%sT 1946
217 -5:00 NYC E%sT 1967
218 -5:00 US E%sT
219
| 192# Connecticut, Delaware, District of Columbia, most of Florida,
193# Georgia, far southeastern Indiana, eastern Kentucky, Maine,
194# Maryland, Massachusetts, New Hampshire, New Jersey, New York, North
195# Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, eastern
196# Tennessee, Vermont, Virginia, West Virginia
197
198# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
199Rule NYC 1920 only - Mar lastSun 2:00 1:00 D
200Rule NYC 1920 only - Oct lastSun 2:00 0 S
201Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D
202Rule NYC 1921 1954 - Sep lastSun 2:00 0 S
203Rule NYC 1955 1966 - Oct lastSun 2:00 0 S
204# Zone NAME GMTOFF RULES FORMAT [UNTIL]
205Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:00
206 -5:00 US E%sT 1920
207 -5:00 NYC E%sT 1942
208 -5:00 US E%sT 1946
209 -5:00 NYC E%sT 1967
210 -5:00 US E%sT
211
|
220# US Central time, represented by Chicago
| 212# US central time, represented by Chicago
|
221
222# Alabama, Arkansas, Florida panhandle, Illinois, western Indiana
223# corners, Iowa, most of Kansas, western Kentucky, Louisiana,
224# Minnesota, Mississippi, Missouri, eastern Nebraska, eastern North
225# Dakota, Oklahoma, eastern South Dakota, western Tennessee, most of
226# Texas, Wisconsin
227
228# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
229Rule Chicago 1920 only - Jun 13 2:00 1:00 D
230Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S
231Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D
232Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D
233Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S
234Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S
235# Zone NAME GMTOFF RULES FORMAT [UNTIL]
236Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:00
237 -6:00 US C%sT 1920
238 -6:00 Chicago C%sT 1936 Mar 1 2:00
239 -5:00 - EST 1936 Nov 15 2:00
240 -6:00 Chicago C%sT 1942
241 -6:00 US C%sT 1946
242 -6:00 Chicago C%sT 1967
243 -6:00 US C%sT
| 213
214# Alabama, Arkansas, Florida panhandle, Illinois, western Indiana
215# corners, Iowa, most of Kansas, western Kentucky, Louisiana,
216# Minnesota, Mississippi, Missouri, eastern Nebraska, eastern North
217# Dakota, Oklahoma, eastern South Dakota, western Tennessee, most of
218# Texas, Wisconsin
219
220# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
221Rule Chicago 1920 only - Jun 13 2:00 1:00 D
222Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S
223Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D
224Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D
225Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S
226Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S
227# Zone NAME GMTOFF RULES FORMAT [UNTIL]
228Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:00
229 -6:00 US C%sT 1920
230 -6:00 Chicago C%sT 1936 Mar 1 2:00
231 -5:00 - EST 1936 Nov 15 2:00
232 -6:00 Chicago C%sT 1942
233 -6:00 US C%sT 1946
234 -6:00 Chicago C%sT 1967
235 -6:00 US C%sT
|
| 236# Oliver County, ND switched from mountain to central time on 1992-10-25.
237Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:00
238 -7:00 US M%sT 1992 Oct 25 02:00
239 -6:00 US C%sT
|
244
| 240
|
245# US Mountain time, represented by Denver
| 241# US mountain time, represented by Denver
|
246#
247# Colorado, southern Idaho, far western Kansas, Montana, western
| 242#
243# Colorado, southern Idaho, far western Kansas, Montana, western
|
248# Nebraska, New Mexico, southwestern North Dakota, far eastern Oregon,
| 244# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City),
245# New Mexico, southwestern North Dakota, far eastern Oregon,
|
249# western South Dakota, far western Texas (El Paso County, Hudspeth County,
250# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming
251#
252# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
253Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D
254Rule Denver 1920 only - Oct lastSun 2:00 0 S
255Rule Denver 1921 only - May 22 2:00 0 S
256Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D
257Rule Denver 1965 1966 - Oct lastSun 2:00 0 S
258# Zone NAME GMTOFF RULES FORMAT [UNTIL]
259Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00
260 -7:00 US M%sT 1920
261 -7:00 Denver M%sT 1942
262 -7:00 US M%sT 1946
263 -7:00 Denver M%sT 1967
264 -7:00 US M%sT
265
266# US Pacific time, represented by Los Angeles
267#
| 246# western South Dakota, far western Texas (El Paso County, Hudspeth County,
247# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming
248#
249# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
250Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D
251Rule Denver 1920 only - Oct lastSun 2:00 0 S
252Rule Denver 1921 only - May 22 2:00 0 S
253Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D
254Rule Denver 1965 1966 - Oct lastSun 2:00 0 S
255# Zone NAME GMTOFF RULES FORMAT [UNTIL]
256Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00
257 -7:00 US M%sT 1920
258 -7:00 Denver M%sT 1942
259 -7:00 US M%sT 1946
260 -7:00 Denver M%sT 1967
261 -7:00 US M%sT
262
263# US Pacific time, represented by Los Angeles
264#
|
268# California, northern Idaho, Nevada, most of Oregon, and Washington
| 265# California, northern Idaho, most of Nevada, most of Oregon, and Washington
|
269#
270# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
271Rule CA 1948 only - Mar 14 2:00 1:00 D
272Rule CA 1949 only - Jan 1 2:00 0 S
273Rule CA 1950 1966 - Apr lastSun 2:00 1:00 D
274Rule CA 1950 1961 - Sep lastSun 2:00 0 S
275Rule CA 1962 1966 - Oct lastSun 2:00 0 S
276# Zone NAME GMTOFF RULES FORMAT [UNTIL]
277Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:00
278 -8:00 US P%sT 1946
279 -8:00 CA P%sT 1967
280 -8:00 US P%sT
281
282# Alaska
283# AK%sT is the modern abbreviation for -9:00 per USNO.
284#
| 266#
267# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
268Rule CA 1948 only - Mar 14 2:00 1:00 D
269Rule CA 1949 only - Jan 1 2:00 0 S
270Rule CA 1950 1966 - Apr lastSun 2:00 1:00 D
271Rule CA 1950 1961 - Sep lastSun 2:00 0 S
272Rule CA 1962 1966 - Oct lastSun 2:00 0 S
273# Zone NAME GMTOFF RULES FORMAT [UNTIL]
274Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:00
275 -8:00 US P%sT 1946
276 -8:00 CA P%sT 1967
277 -8:00 US P%sT
278
279# Alaska
280# AK%sT is the modern abbreviation for -9:00 per USNO.
281#
|
285# From Paul Eggert (2001-04-01):
| 282# From Paul Eggert (2001-05-30):
|
286# Howse writes that Alaska switched from the Julian to the Gregorian calendar,
287# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia.
288# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian,
289# also a Friday. Include only the time zone part of this transition,
290# ignoring the switch from Julian to Gregorian, since we can't represent
291# the Julian calendar.
292#
| 283# Howse writes that Alaska switched from the Julian to the Gregorian calendar,
284# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia.
285# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian,
286# also a Friday. Include only the time zone part of this transition,
287# ignoring the switch from Julian to Gregorian, since we can't represent
288# the Julian calendar.
289#
|
| 290# As far as we know, none of the exact locations mentioned below were
291# permanently inhabited in 1867 by anyone using either calendar.
292# (Yakutat was colonized by the Russians in 1799, but the settlement
293# was destroyed in 1805 by a Yakutat-kon war party.) However, there
294# were nearby inhabitants in some cases and for our purposes perhaps
295# it's best to simply use the official transition.
296#
|
293# Zone NAME GMTOFF RULES FORMAT [UNTIL]
294Zone America/Juneau 15:02:19 - LMT 1867 Oct 18
295 -8:57:41 - LMT 1900 Aug 20 12:00
296 -8:00 - PST 1942
297 -8:00 US P%sT 1946
298 -8:00 - PST 1969
299 -8:00 US P%sT 1983 Oct 30 2:00
300 -9:00 US AK%sT
301Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18
302 -9:18:55 - LMT 1900 Aug 20 12:00
303 -9:00 - YST 1942
304 -9:00 US Y%sT 1946
305 -9:00 - YST 1969
306 -9:00 US Y%sT 1983 Oct 30 2:00
307 -9:00 US AK%sT
308Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18
309 -9:59:36 - LMT 1900 Aug 20 12:00
310 -10:00 - CAT 1942
311 -10:00 US CAT/CAWT 1946
312 -10:00 - CAT 1967 Apr
313 -10:00 - AHST 1969
314 -10:00 US AH%sT 1983 Oct 30 2:00
315 -9:00 US AK%sT
316Zone America/Nome 12:58:21 - LMT 1867 Oct 18
317 -11:01:38 - LMT 1900 Aug 20 12:00
318 -11:00 - NST 1942
319 -11:00 US N%sT 1946
320 -11:00 - NST 1967 Apr
321 -11:00 - BST 1969
322 -11:00 US B%sT 1983 Oct 30 2:00
323 -9:00 US AK%sT
324Zone America/Adak 12:13:21 - LMT 1867 Oct 18
325 -11:46:38 - LMT 1900 Aug 20 12:00
326 -11:00 - NST 1942
327 -11:00 US N%sT 1946
328 -11:00 - NST 1967 Apr
329 -11:00 - BST 1969
330 -11:00 US B%sT 1983 Oct 30 2:00
331 -10:00 US HA%sT
332# Shanks writes that part of southwest Alaska (e.g. Aniak)
333# switched from -11:00 to -10:00 on 1968-09-22 at 02:00,
334# and another part (e.g. Akiak) made the same switch five weeks later.
335# These switches don't quite make our 1970 cutoff.
336
337# Hawaii
338#
339# From Arthur David Olson:
340# And then there's Hawaii.
341# DST was observed for one day in 1933;
342# standard time was changed by half an hour in 1947;
343# it's always standard as of 1986.
344#
345# From Paul Eggert:
346# Shanks says the 1933 experiment lasted for three weeks. Go with Shanks.
347#
348Zone Pacific/Honolulu -10:31:26 - LMT 1900 Jan 1 12:00
349 -10:30 - HST 1933 Apr 30 2:00
350 -10:30 1:00 HDT 1933 May 21 2:00
351 -10:30 US H%sT 1947 Jun 8 2:00
352 -10:00 - HST
353
354# Now we turn to US areas that have diverged from the consensus since 1970.
355
356# Arizona mostly uses MST.
357Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 12:00
358 -7:00 US M%sT 1944 Jan 1 00:01
359 -7:00 - MST 1944 Mar 17 00:01
360 -7:00 US M%sT 1944 Oct 1 00:01
361 -7:00 - MST 1967
362 -7:00 US M%sT 1968
363 -7:00 - MST
364# From Arthur David Olson (1988-02-13):
365# A writer from the Inter Tribal Council of Arizona, Inc.,
366# notes in private correspondence dated 12/28/87 that "Presently, only the
367# Navajo Nation participates in the Daylight Saving Time policy, due to its
368# large size and location in three states." (The "only" means that other
369# tribal nations don't use DST.)
370
371Link America/Denver America/Shiprock
372
373# Southern Idaho and eastern Oregon switched four weeks late in 1974.
374# Zone NAME GMTOFF RULES FORMAT [UNTIL]
375Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:00
376 -8:00 US P%sT 1923 May 13 2:00
377 -7:00 US M%sT 1974
378 -7:00 - MST 1974 Feb 3 2:00
379 -7:00 US M%sT
380
381# Indiana
382#
383# For a map of Indiana's time zone regions, see:
384# <a href="http://www.mccsc.edu/time.html">
385# What time is it in Indiana?
386# </a> (1999-04-06)
387#
388# From Paul Eggert (1995-12-19):
389# Indiana generally observes either EST all year, or CST/CDT,
390# but areas near Cincinnati and Louisville use those cities' timekeeping
391# and in 1969 and 1970 the whole state observed daylight time;
392# and there are other exceptions as noted below.
393# Shanks partitions Indiana into 345 regions, each with its own time history,
394# and writes ``Even newspaper reports present contradictory information.''
395# Fortunately, most of the complexity occurred before our cutoff date of 1970.
396#
397# Since 1970, EST-only Indiana has been like America/Indianapolis,
398# with exceptions noted below for Crawford, Starke, and Switzerland counties.
399# The parts of Indiana not listed below have been like America/Chicago,
400# America/Louisville, or America/New_York.
401#
402# Other than Indianapolis, the Indiana place names are so nondescript
403# that they would be ambiguous if we left them at the `America' level.
404# So we reluctantly put them all in a subdirectory `America/Indiana'.
405#
406# Most of EST-only Indiana last observed DST in 1970.
407
408# From Paul Eggert (2001-03-06), following a tip by Markus Kuhn:
409# Pam Belluck reported in the New York Times (2001-01-31) that the
410# Indiana Legislature is considering a bill to adopt DST statewide.
411# Her article mentioned Vevay, whose post office observes a different
| 297# Zone NAME GMTOFF RULES FORMAT [UNTIL]
298Zone America/Juneau 15:02:19 - LMT 1867 Oct 18
299 -8:57:41 - LMT 1900 Aug 20 12:00
300 -8:00 - PST 1942
301 -8:00 US P%sT 1946
302 -8:00 - PST 1969
303 -8:00 US P%sT 1983 Oct 30 2:00
304 -9:00 US AK%sT
305Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18
306 -9:18:55 - LMT 1900 Aug 20 12:00
307 -9:00 - YST 1942
308 -9:00 US Y%sT 1946
309 -9:00 - YST 1969
310 -9:00 US Y%sT 1983 Oct 30 2:00
311 -9:00 US AK%sT
312Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18
313 -9:59:36 - LMT 1900 Aug 20 12:00
314 -10:00 - CAT 1942
315 -10:00 US CAT/CAWT 1946
316 -10:00 - CAT 1967 Apr
317 -10:00 - AHST 1969
318 -10:00 US AH%sT 1983 Oct 30 2:00
319 -9:00 US AK%sT
320Zone America/Nome 12:58:21 - LMT 1867 Oct 18
321 -11:01:38 - LMT 1900 Aug 20 12:00
322 -11:00 - NST 1942
323 -11:00 US N%sT 1946
324 -11:00 - NST 1967 Apr
325 -11:00 - BST 1969
326 -11:00 US B%sT 1983 Oct 30 2:00
327 -9:00 US AK%sT
328Zone America/Adak 12:13:21 - LMT 1867 Oct 18
329 -11:46:38 - LMT 1900 Aug 20 12:00
330 -11:00 - NST 1942
331 -11:00 US N%sT 1946
332 -11:00 - NST 1967 Apr
333 -11:00 - BST 1969
334 -11:00 US B%sT 1983 Oct 30 2:00
335 -10:00 US HA%sT
336# Shanks writes that part of southwest Alaska (e.g. Aniak)
337# switched from -11:00 to -10:00 on 1968-09-22 at 02:00,
338# and another part (e.g. Akiak) made the same switch five weeks later.
339# These switches don't quite make our 1970 cutoff.
340
341# Hawaii
342#
343# From Arthur David Olson:
344# And then there's Hawaii.
345# DST was observed for one day in 1933;
346# standard time was changed by half an hour in 1947;
347# it's always standard as of 1986.
348#
349# From Paul Eggert:
350# Shanks says the 1933 experiment lasted for three weeks. Go with Shanks.
351#
352Zone Pacific/Honolulu -10:31:26 - LMT 1900 Jan 1 12:00
353 -10:30 - HST 1933 Apr 30 2:00
354 -10:30 1:00 HDT 1933 May 21 2:00
355 -10:30 US H%sT 1947 Jun 8 2:00
356 -10:00 - HST
357
358# Now we turn to US areas that have diverged from the consensus since 1970.
359
360# Arizona mostly uses MST.
361Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 12:00
362 -7:00 US M%sT 1944 Jan 1 00:01
363 -7:00 - MST 1944 Mar 17 00:01
364 -7:00 US M%sT 1944 Oct 1 00:01
365 -7:00 - MST 1967
366 -7:00 US M%sT 1968
367 -7:00 - MST
368# From Arthur David Olson (1988-02-13):
369# A writer from the Inter Tribal Council of Arizona, Inc.,
370# notes in private correspondence dated 12/28/87 that "Presently, only the
371# Navajo Nation participates in the Daylight Saving Time policy, due to its
372# large size and location in three states." (The "only" means that other
373# tribal nations don't use DST.)
374
375Link America/Denver America/Shiprock
376
377# Southern Idaho and eastern Oregon switched four weeks late in 1974.
378# Zone NAME GMTOFF RULES FORMAT [UNTIL]
379Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:00
380 -8:00 US P%sT 1923 May 13 2:00
381 -7:00 US M%sT 1974
382 -7:00 - MST 1974 Feb 3 2:00
383 -7:00 US M%sT
384
385# Indiana
386#
387# For a map of Indiana's time zone regions, see:
388# <a href="http://www.mccsc.edu/time.html">
389# What time is it in Indiana?
390# </a> (1999-04-06)
391#
392# From Paul Eggert (1995-12-19):
393# Indiana generally observes either EST all year, or CST/CDT,
394# but areas near Cincinnati and Louisville use those cities' timekeeping
395# and in 1969 and 1970 the whole state observed daylight time;
396# and there are other exceptions as noted below.
397# Shanks partitions Indiana into 345 regions, each with its own time history,
398# and writes ``Even newspaper reports present contradictory information.''
399# Fortunately, most of the complexity occurred before our cutoff date of 1970.
400#
401# Since 1970, EST-only Indiana has been like America/Indianapolis,
402# with exceptions noted below for Crawford, Starke, and Switzerland counties.
403# The parts of Indiana not listed below have been like America/Chicago,
404# America/Louisville, or America/New_York.
405#
406# Other than Indianapolis, the Indiana place names are so nondescript
407# that they would be ambiguous if we left them at the `America' level.
408# So we reluctantly put them all in a subdirectory `America/Indiana'.
409#
410# Most of EST-only Indiana last observed DST in 1970.
411
412# From Paul Eggert (2001-03-06), following a tip by Markus Kuhn:
413# Pam Belluck reported in the New York Times (2001-01-31) that the
414# Indiana Legislature is considering a bill to adopt DST statewide.
415# Her article mentioned Vevay, whose post office observes a different
|
412# time zone than Danner's Hardware across the street.
| 416# time zone from Danner's Hardware across the street.
|
413
414# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
415Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D
416Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S
417Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D
418# Zone NAME GMTOFF RULES FORMAT [UNTIL]
419Zone America/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:00
420 -6:00 US C%sT 1920
421 -6:00 Indianapolis C%sT 1942
422 -6:00 US C%sT 1946
423 -6:00 Indianapolis C%sT 1955 Apr 24 2:00
424 -5:00 - EST 1957 Sep 29 2:00
425 -6:00 - CST 1958 Apr 27 2:00
426 -5:00 - EST 1969
427 -5:00 US E%sT 1971
428 -5:00 - EST
429Link America/Indianapolis America/Indiana/Indianapolis
430#
431# Part of Crawford County, Indiana, last observed DST in 1975,
432# and left its clocks alone in 1974.
433# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
434Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D
435Rule Marengo 1951 only - Sep lastSun 2:00 0 S
436Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D
437Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S
438# Zone NAME GMTOFF RULES FORMAT [UNTIL]
439Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:00
440 -6:00 US C%sT 1951
441 -6:00 Marengo C%sT 1961 Apr 30 2:00
442 -5:00 - EST 1969
443 -5:00 US E%sT 1974 Jan 6 2:00
444 -6:00 1:00 CDT 1974 Oct 27 2:00
445 -5:00 US E%sT 1976
446 -5:00 - EST
447#
448# Starke County, Indiana
449# From Arthur David Olson (1991-10-28):
450# An article on page A3 of the Sunday, 1991-10-27 Washington Post
451# notes that Starke County switched from Central time to Eastern time as of
452# 1991-10-27.
453# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
454Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D
455Rule Starke 1947 1954 - Sep lastSun 2:00 0 S
456Rule Starke 1955 1956 - Oct lastSun 2:00 0 S
457Rule Starke 1957 1958 - Sep lastSun 2:00 0 S
458Rule Starke 1959 1961 - Oct lastSun 2:00 0 S
459# Zone NAME GMTOFF RULES FORMAT [UNTIL]
460Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:00
461 -6:00 US C%sT 1947
462 -6:00 Starke C%sT 1962 Apr 29 2:00
463 -5:00 - EST 1963 Oct 27 2:00
464 -6:00 US C%sT 1991 Oct 27 2:00
465 -5:00 - EST
466#
467# Switzerland County, Indiana, last observed DST in 1972.
468# Zone NAME GMTOFF RULES FORMAT [UNTIL]
469Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:00
470 -6:00 US C%sT 1954 Apr 25 2:00
471 -5:00 - EST 1969
472 -5:00 US E%sT 1973
473 -5:00 - EST
474
475# Part of Kentucky left its clocks alone in 1974.
476# This also includes a part of Indiana immediately adjacent to Louisville.
477# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
478Rule Louisville 1921 only - May 1 2:00 1:00 D
479Rule Louisville 1921 only - Sep 1 2:00 0 S
480Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D
481Rule Louisville 1941 only - Sep lastSun 2:00 0 S
482Rule Louisville 1946 only - Jun 2 2:00 0 S
483Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S
484Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S
485# Zone NAME GMTOFF RULES FORMAT [UNTIL]
486Zone America/Louisville -5:43:02 - LMT 1883 Nov 18 12:00
487 -6:00 US C%sT 1921
488 -6:00 Louisville C%sT 1942
489 -6:00 US C%sT 1946
490 -6:00 Louisville C%sT 1961 Jul 23 2:00
491 -5:00 - EST 1968
492 -5:00 US E%sT 1974 Jan 6 2:00
493 -6:00 1:00 CDT 1974 Oct 27 2:00
494 -5:00 US E%sT
495Link America/Louisville America/Kentucky/Louisville
496#
497# Wayne, Clinton, and Russell Counties, Kentucky
498#
499# From
500# <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml">
501# Lake Cumberland LIFE
502# </a> (1999-01-29) via WKYM-101.7:
503# Clinton County has joined Wayne County in asking the DoT to change from
504# the Central to the Eastern time zone.... The Wayne County government made
505# the same request in December. And while Russell County officials have not
506# taken action, the majority of respondents to a poll conducted there in
507# August indicated they would like to change to "fast time" also.
508# The three Lake Cumberland counties are the farthest east of any U.S.
509# location in the Central time zone.
510#
511# From Rich Wales (2000-08-29):
512# After prolonged debate, and despite continuing deep differences of opinion,
513# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern
514# (-0500) time. They won't "fall back" this year. See Sara Shipley,
515# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400).
| 417
418# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
419Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D
420Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S
421Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D
422# Zone NAME GMTOFF RULES FORMAT [UNTIL]
423Zone America/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:00
424 -6:00 US C%sT 1920
425 -6:00 Indianapolis C%sT 1942
426 -6:00 US C%sT 1946
427 -6:00 Indianapolis C%sT 1955 Apr 24 2:00
428 -5:00 - EST 1957 Sep 29 2:00
429 -6:00 - CST 1958 Apr 27 2:00
430 -5:00 - EST 1969
431 -5:00 US E%sT 1971
432 -5:00 - EST
433Link America/Indianapolis America/Indiana/Indianapolis
434#
435# Part of Crawford County, Indiana, last observed DST in 1975,
436# and left its clocks alone in 1974.
437# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
438Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D
439Rule Marengo 1951 only - Sep lastSun 2:00 0 S
440Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D
441Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S
442# Zone NAME GMTOFF RULES FORMAT [UNTIL]
443Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:00
444 -6:00 US C%sT 1951
445 -6:00 Marengo C%sT 1961 Apr 30 2:00
446 -5:00 - EST 1969
447 -5:00 US E%sT 1974 Jan 6 2:00
448 -6:00 1:00 CDT 1974 Oct 27 2:00
449 -5:00 US E%sT 1976
450 -5:00 - EST
451#
452# Starke County, Indiana
453# From Arthur David Olson (1991-10-28):
454# An article on page A3 of the Sunday, 1991-10-27 Washington Post
455# notes that Starke County switched from Central time to Eastern time as of
456# 1991-10-27.
457# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
458Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D
459Rule Starke 1947 1954 - Sep lastSun 2:00 0 S
460Rule Starke 1955 1956 - Oct lastSun 2:00 0 S
461Rule Starke 1957 1958 - Sep lastSun 2:00 0 S
462Rule Starke 1959 1961 - Oct lastSun 2:00 0 S
463# Zone NAME GMTOFF RULES FORMAT [UNTIL]
464Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:00
465 -6:00 US C%sT 1947
466 -6:00 Starke C%sT 1962 Apr 29 2:00
467 -5:00 - EST 1963 Oct 27 2:00
468 -6:00 US C%sT 1991 Oct 27 2:00
469 -5:00 - EST
470#
471# Switzerland County, Indiana, last observed DST in 1972.
472# Zone NAME GMTOFF RULES FORMAT [UNTIL]
473Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:00
474 -6:00 US C%sT 1954 Apr 25 2:00
475 -5:00 - EST 1969
476 -5:00 US E%sT 1973
477 -5:00 - EST
478
479# Part of Kentucky left its clocks alone in 1974.
480# This also includes a part of Indiana immediately adjacent to Louisville.
481# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
482Rule Louisville 1921 only - May 1 2:00 1:00 D
483Rule Louisville 1921 only - Sep 1 2:00 0 S
484Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D
485Rule Louisville 1941 only - Sep lastSun 2:00 0 S
486Rule Louisville 1946 only - Jun 2 2:00 0 S
487Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S
488Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S
489# Zone NAME GMTOFF RULES FORMAT [UNTIL]
490Zone America/Louisville -5:43:02 - LMT 1883 Nov 18 12:00
491 -6:00 US C%sT 1921
492 -6:00 Louisville C%sT 1942
493 -6:00 US C%sT 1946
494 -6:00 Louisville C%sT 1961 Jul 23 2:00
495 -5:00 - EST 1968
496 -5:00 US E%sT 1974 Jan 6 2:00
497 -6:00 1:00 CDT 1974 Oct 27 2:00
498 -5:00 US E%sT
499Link America/Louisville America/Kentucky/Louisville
500#
501# Wayne, Clinton, and Russell Counties, Kentucky
502#
503# From
504# <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml">
505# Lake Cumberland LIFE
506# </a> (1999-01-29) via WKYM-101.7:
507# Clinton County has joined Wayne County in asking the DoT to change from
508# the Central to the Eastern time zone.... The Wayne County government made
509# the same request in December. And while Russell County officials have not
510# taken action, the majority of respondents to a poll conducted there in
511# August indicated they would like to change to "fast time" also.
512# The three Lake Cumberland counties are the farthest east of any U.S.
513# location in the Central time zone.
514#
515# From Rich Wales (2000-08-29):
516# After prolonged debate, and despite continuing deep differences of opinion,
517# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern
518# (-0500) time. They won't "fall back" this year. See Sara Shipley,
519# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400).
|
| 520#
521# From Paul Eggert (2001-07-16):
522# The final rule was published in the
523# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22">
524# Federal Register 65, 160 (2000-08-17), page 50154-50158.
525# </a>
526#
|
516Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:00
517 -6:00 US C%sT 1946
518 -6:00 - CST 1968
519 -6:00 US C%sT 2000 Oct 29 2:00
520 -5:00 US E%sT
521
522
523# From Rives McDow (2000-08-30):
524# Here ... are all the changes in the US since 1985.
525# Kearny County, KS (put all of county on central;
526# previously split between MST and CST) ... 1990-10
527# Starke County, IN (from CST to EST) ... 1991-10
528# Oliver County, ND (from MST to CST) ... 1992-10
529# West Wendover, NV (from PST TO MST) ... 1999-10
530# Wayne County, KY (from CST to EST) ... 2000-10
| 527Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:00
528 -6:00 US C%sT 1946
529 -6:00 - CST 1968
530 -6:00 US C%sT 2000 Oct 29 2:00
531 -5:00 US E%sT
532
533
534# From Rives McDow (2000-08-30):
535# Here ... are all the changes in the US since 1985.
536# Kearny County, KS (put all of county on central;
537# previously split between MST and CST) ... 1990-10
538# Starke County, IN (from CST to EST) ... 1991-10
539# Oliver County, ND (from MST to CST) ... 1992-10
540# West Wendover, NV (from PST TO MST) ... 1999-10
541# Wayne County, KY (from CST to EST) ... 2000-10
|
531# There is another change in the offing; Mercer County, ND is looking
532# to change from MT to CT. It is possible that two other ND counties
533# (Sioux and Morton) will look to change also. If made, the earliest
534# a change would be effective is October 2001.
| |
535#
| 542#
|
536# From Paul Eggert (2000-10-02):
537# FIXME: I haven't yet had time to incorporate all the above changes.
| 543# From Paul Eggert (2001-07-17):
544# We don't know where the line used to be within Kearny County, KS,
545# so omit that change for now.
546# See America/Indiana/Knox for the Starke County, IN change.
547# See America/North_Dakota/Center for the Oliver County, ND change.
548# West Wendover, NV officially switched from Pacific to mountain time on
549# 1999-10-31. See the
550# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15">
551# Federal Register 64, 203 (1999-10-21), page 56705-56707.
552# </a>
553# However, the Federal Register says that West Wendover already operated
554# on mountain time, and the rule merely made this official;
555# hence a separate tz entry is not needed.
|
538
539# Michigan
540#
541# From Bob Devine (1988-01-28):
542# Michigan didn't observe DST from 1968 to 1973.
543#
544# From Paul Eggert (1999-03-31):
545# Shanks writes that Michigan started using standard time on 1885-09-18,
546# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01)
547# that Detroit kept
548#
549# local time until 1900 when the City Council decreed that clocks should
550# be put back twenty-eight minutes to Central Standard Time. Half the
551# city obeyed, half refused. After considerable debate, the decision
552# was rescinded and the city reverted to Sun time. A derisive offer to
553# erect a sundial in front of the city hall was referred to the
554# Committee on Sewers. Then, in 1905, Central time was adopted
555# by city vote.
556#
557# This story is too entertaining to be false, so go with Howse over Shanks.
558#
559# From Paul Eggert (2001-03-06):
560# Garland (1927) writes ``Cleveland and Detroit advanced their clocks
561# one hour in 1914.'' This change is not in Shanks. We have no more
562# info, so omit this for now.
563#
564# Most of Michigan observed DST from 1973 on, but was a bit late in 1975.
565# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
566Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D
567Rule Detroit 1948 only - Sep lastSun 2:00 0 S
568Rule Detroit 1967 only - Jun 14 2:00 1:00 D
569Rule Detroit 1967 only - Oct lastSun 2:00 0 S
570# Zone NAME GMTOFF RULES FORMAT [UNTIL]
571Zone America/Detroit -5:32:11 - LMT 1905
572 -6:00 - CST 1915 May 15 2:00
573 -5:00 - EST 1942
574 -5:00 US E%sT 1946
575 -5:00 Detroit E%sT 1973
576 -5:00 US E%sT 1975
577 -5:00 - EST 1975 Apr 27 2:00
578 -5:00 US E%sT
579#
580# The Michigan border with Wisconsin switched from EST to CST/CDT in 1973.
581# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
582Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D
583Rule Menominee 1946 only - Sep lastSun 2:00 0 S
584Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D
585Rule Menominee 1966 only - Oct lastSun 2:00 0 S
586# Zone NAME GMTOFF RULES FORMAT [UNTIL]
587Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00
588 -6:00 US C%sT 1946
589 -6:00 Menominee C%sT 1969 Apr 27 2:00
590 -5:00 - EST 1973 Apr 29 2:00
591 -6:00 US C%sT
592
593# Navassa
| 556
557# Michigan
558#
559# From Bob Devine (1988-01-28):
560# Michigan didn't observe DST from 1968 to 1973.
561#
562# From Paul Eggert (1999-03-31):
563# Shanks writes that Michigan started using standard time on 1885-09-18,
564# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01)
565# that Detroit kept
566#
567# local time until 1900 when the City Council decreed that clocks should
568# be put back twenty-eight minutes to Central Standard Time. Half the
569# city obeyed, half refused. After considerable debate, the decision
570# was rescinded and the city reverted to Sun time. A derisive offer to
571# erect a sundial in front of the city hall was referred to the
572# Committee on Sewers. Then, in 1905, Central time was adopted
573# by city vote.
574#
575# This story is too entertaining to be false, so go with Howse over Shanks.
576#
577# From Paul Eggert (2001-03-06):
578# Garland (1927) writes ``Cleveland and Detroit advanced their clocks
579# one hour in 1914.'' This change is not in Shanks. We have no more
580# info, so omit this for now.
581#
582# Most of Michigan observed DST from 1973 on, but was a bit late in 1975.
583# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
584Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D
585Rule Detroit 1948 only - Sep lastSun 2:00 0 S
586Rule Detroit 1967 only - Jun 14 2:00 1:00 D
587Rule Detroit 1967 only - Oct lastSun 2:00 0 S
588# Zone NAME GMTOFF RULES FORMAT [UNTIL]
589Zone America/Detroit -5:32:11 - LMT 1905
590 -6:00 - CST 1915 May 15 2:00
591 -5:00 - EST 1942
592 -5:00 US E%sT 1946
593 -5:00 Detroit E%sT 1973
594 -5:00 US E%sT 1975
595 -5:00 - EST 1975 Apr 27 2:00
596 -5:00 US E%sT
597#
598# The Michigan border with Wisconsin switched from EST to CST/CDT in 1973.
599# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
600Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D
601Rule Menominee 1946 only - Sep lastSun 2:00 0 S
602Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D
603Rule Menominee 1966 only - Oct lastSun 2:00 0 S
604# Zone NAME GMTOFF RULES FORMAT [UNTIL]
605Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00
606 -6:00 US C%sT 1946
607 -6:00 Menominee C%sT 1969 Apr 27 2:00
608 -5:00 - EST 1973 Apr 29 2:00
609 -6:00 US C%sT
610
611# Navassa
|
| 612# administered by the US Fish and Wildlife Service
|
594# claimed by US under the provisions of the 1856 Guano Islands Act
595# also claimed by Haiti
596# occupied 1857/1900 by the Navassa Phosphate Co
| 613# claimed by US under the provisions of the 1856 Guano Islands Act
614# also claimed by Haiti
615# occupied 1857/1900 by the Navassa Phosphate Co
|
597# US lighthouse 1917/1997-01
| 616# US lighthouse 1917/1996-09
|
598# currently uninhabited
599# see Mark Fineman, ``An Isle Rich in Guano and Discord'',
600# _Los Angeles Times_ (1998-11-10), A1, A10; it cites
601# Jimmy Skaggs, _The Great Guano Rush_ (1994).
602
603# Old names, for S5 users
604
605# Link LINK-FROM LINK-TO
606Link America/New_York EST5EDT
607Link America/Chicago CST6CDT
608Link America/Denver MST7MDT
609Link America/Los_Angeles PST8PDT
610Link America/Indianapolis EST
611Link America/Phoenix MST
612Link Pacific/Honolulu HST
613
614################################################################################
615
616
617# From Paul Eggert <eggert@twinsun.com> (1999-10-29):
618# A good source for time zone historical data outside the US is
619# Thomas G. Shanks, The International Atlas (5th edition),
620# San Diego: ACS Publications, Inc. (1999).
621#
| 617# currently uninhabited
618# see Mark Fineman, ``An Isle Rich in Guano and Discord'',
619# _Los Angeles Times_ (1998-11-10), A1, A10; it cites
620# Jimmy Skaggs, _The Great Guano Rush_ (1994).
621
622# Old names, for S5 users
623
624# Link LINK-FROM LINK-TO
625Link America/New_York EST5EDT
626Link America/Chicago CST6CDT
627Link America/Denver MST7MDT
628Link America/Los_Angeles PST8PDT
629Link America/Indianapolis EST
630Link America/Phoenix MST
631Link Pacific/Honolulu HST
632
633################################################################################
634
635
636# From Paul Eggert <eggert@twinsun.com> (1999-10-29):
637# A good source for time zone historical data outside the US is
638# Thomas G. Shanks, The International Atlas (5th edition),
639# San Diego: ACS Publications, Inc. (1999).
640#
|
622# Gwillim Law <Gwil_Law@bridge-point.com> writes that a good source
| 641# Gwillim Law writes that a good source
|
623# for recent time zone data is the International Air Transport
624# Association's Standard Schedules Information Manual (IATA SSIM),
625# published semiannually. Law sent in several helpful summaries
626# of the IATA's data after 1990.
627#
628# Except where otherwise noted, Shanks is the source for entries through 1990,
629# and IATA SSIM is the source for entries after 1990.
630#
631# Another source occasionally used is Edward W. Whitman, World Time Differences,
632# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), which
633# I found in the UCLA library.
634#
635# See the `europe' file for Greenland.
636
637# Canada
638
639# From Alain LaBont<e'> <ALB@immedia.ca> (1994-11-14):
640# I post here the time zone abbreviations standardized in Canada
641# for both English and French in the CAN/CSA-Z234.4-89 standard....
642#
643# UTC Standard time Daylight savings time
644# offset French English French English
645# -2:30 - - HAT NDT
646# -3 - - HAA ADT
647# -3:30 HNT NST - -
648# -4 HNA AST HAE EDT
649# -5 HNE EST HAC CDT
650# -6 HNC CST HAR MDT
651# -7 HNR MST HAP PDT
652# -8 HNP PST HAY YDT
653# -9 HNY YST - -
654#
655# HN: Heure Normale ST: Standard Time
656# HA: Heure Avanc<e'>e DT: Daylight saving Time
657#
658# A: de l'Atlantique Atlantic
659# C: du Centre Central
660# E: de l'Est Eastern
661# M: Mountain
662# N: Newfoundland
663# P: du Pacifique Pacific
664# R: des Rocheuses
665# T: de Terre-Neuve
666# Y: du Yukon Yukon
667#
668# From Paul Eggert <eggert@twinsun.com> (1994-11-22):
669# Alas, this sort of thing must be handled by localization software.
670
671# Unless otherwise specified, the data for Canada are all from Shanks.
672
673# From Paul Eggert (2000-10-02):
674# H. David Matthews and Mary Vincent's map
675# <a href="http://www.canadiangeographic.ca/SO98/geomap.htm">
676# "It's about TIME", _Canadian Geographic_ (September-October 1998)
677# </a> contains detailed boundaries for regions observing nonstandard
678# time and daylight saving time arrangements in Canada circa 1998.
679#
680# INMS, the Institute for National Measurement Standards in Ottawa, has
681# <a href="http://www.nrc.ca/inms/time/tze.html">
682# information about standard and daylight saving time zones in Canada.
683# </a> (updated periodically).
684# Its unofficial information is often taken from Matthews and Vincent.
685
686# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
687Rule Canada 1918 only - Apr 14 2:00 1:00 D
688Rule Canada 1918 only - Oct 31 2:00 0 S
689Rule Canada 1942 only - Feb 9 2:00 1:00 W
690Rule Canada 1945 only - Sep 30 2:00 0 S
691Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D
692Rule Canada 1974 max - Oct lastSun 2:00 0 S
693Rule Canada 1987 max - Apr Sun>=1 2:00 1:00 D
694
695
696# Newfoundland (and far southeast Labrador)
697
698# From Paul Eggert (2000-10-02):
699# Matthews and Vincent (1998) write that Labrador should use NST/NDT,
700# but the only part of Labrador that follows the rules is the
701# southeast corner, including Port Hope Simpson and Mary's Harbour,
702# but excluding, say, Black Tickle.
703
704# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
705Rule StJohns 1917 1918 - Apr Sun>=8 2:00 1:00 D
706Rule StJohns 1917 only - Sep 17 2:00 0 S
707Rule StJohns 1918 only - Oct 31 2:00 0 S
708# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks.
709Rule StJohns 1919 only - May 5 23:00 1:00 D
710Rule StJohns 1919 only - Aug 12 23:00 0 S
711# For 1931-1935 Whitman gives Apr same date; go with Shanks.
712Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D
713Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S
714# For 1936-1941 Shanks gives May Mon>=9 and Oct Mon>=2; go with Whitman.
715Rule StJohns 1936 1941 - May Sun>=8 0:00 1:00 D
716Rule StJohns 1936 1941 - Oct Sun>=1 0:00 0 S
717# Shanks gives 1942 May 11 - 1945 Sep 30; go with Whitman.
718Rule StJohns 1942 only - Mar 1 0:00 1:00 W
719Rule StJohns 1942 only - Dec 31 0:00 0 S
720Rule StJohns 1943 only - May 30 0:00 1:00 W
721Rule StJohns 1943 only - Sep 5 0:00 0 S
722Rule StJohns 1944 only - Jul 10 0:00 1:00 W
723Rule StJohns 1944 only - Sep 2 0:00 0 S
724Rule StJohns 1945 only - Jan 1 0:00 1:00 W
725Rule StJohns 1945 only - Oct 7 2:00 0 S
726# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives
727# Apr 30 - Sep 24; go with Shanks.
728Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D
729Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S
730Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D
731Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S
732Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S
733# From Paul Eggert (2000-10-02):
734# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches
735# at 00:01 local time. For now, assume it started in 1987.
736Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D
737Rule StJohns 1987 max - Oct lastSun 0:01 0 S
738Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD
739Rule StJohns 1989 max - Apr Sun>=1 0:01 1:00 D
740# St John's has an apostrophe, but Posix file names can't have apostrophes.
741# Zone NAME GMTOFF RULES FORMAT [UNTIL]
742Zone America/St_Johns -3:30:52 - LMT 1884
743 -3:30:52 StJohns N%sT 1935 Mar 30
744 -3:30 StJohns N%sT
745
746
747# most of east Labrador
748
749# The name `Happy Valley-Goose Bay' is too long; use `Goose Bay'.
750# Zone NAME GMTOFF RULES FORMAT [UNTIL]
751Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay
752 -3:30:52 StJohns NST 1919
753 -3:30:52 - NST 1935 Mar 30
754 -3:30 - NST 1936
755 -3:30 StJohns N%sT 1966 Mar 15 2:00
756 -4:00 StJohns A%sT
757
758
759# west Labrador, New Brunswick, Nova Scotia, Prince Edward I
760
761# From Paul Eggert (1996-06-12):
762# Shanks writes that since 1970 most of this region has been like Halifax.
763# Many locales did not observe peacetime DST until 1972;
764# Glace Bay, NS is the largest that we know of.
765# Shanks also writes that Liverpool, NS was the only town in Canada to observe
766# DST in 1971 but not 1970; for now we'll assume this is a typo.
767
768# From Paul Eggert (2000-10-02):
769# INMS (2000-09-12) says that, since 1988 at least, New Brunswick switches
770# at 00:01 local time. FIXME: verify and create a new Zone for this.
771
772
773# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
774Rule Halifax 1916 only - Apr 1 0:00 1:00 D
775Rule Halifax 1916 only - Oct 1 0:00 0 S
776Rule Halifax 1918 only - Apr 14 2:00 1:00 D
777Rule Halifax 1918 only - Oct 31 2:00 0 S
778Rule Halifax 1920 only - May 9 0:00 1:00 D
779Rule Halifax 1920 only - Aug 29 0:00 0 S
780Rule Halifax 1921 only - May 6 0:00 1:00 D
781Rule Halifax 1921 1922 - Sep 5 0:00 0 S
782Rule Halifax 1922 only - Apr 30 0:00 1:00 D
783Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D
784Rule Halifax 1923 only - Sep 4 0:00 0 S
785Rule Halifax 1924 only - Sep 15 0:00 0 S
786Rule Halifax 1925 only - Sep 28 0:00 0 S
787Rule Halifax 1926 only - May 16 0:00 1:00 D
788Rule Halifax 1926 only - Sep 13 0:00 0 S
789Rule Halifax 1927 only - May 1 0:00 1:00 D
790Rule Halifax 1927 only - Sep 26 0:00 0 S
791Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D
792Rule Halifax 1928 only - Sep 9 0:00 0 S
793Rule Halifax 1929 only - Sep 3 0:00 0 S
794Rule Halifax 1930 only - Sep 15 0:00 0 S
795Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S
796Rule Halifax 1933 only - Apr 30 0:00 1:00 D
797Rule Halifax 1933 only - Oct 2 0:00 0 S
798Rule Halifax 1934 only - May 20 0:00 1:00 D
799Rule Halifax 1934 only - Sep 16 0:00 0 S
800Rule Halifax 1935 only - Jun 2 0:00 1:00 D
801Rule Halifax 1935 only - Sep 30 0:00 0 S
802Rule Halifax 1936 only - Jun 1 0:00 1:00 D
803Rule Halifax 1936 only - Sep 14 0:00 0 S
804Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D
805Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S
806Rule Halifax 1939 only - May 28 0:00 1:00 D
807Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D
808Rule Halifax 1942 only - Feb 9 2:00 1:00 W
809Rule Halifax 1945 1959 - Sep lastSun 2:00 0 S
810Rule Halifax 1946 1959 - Apr lastSun 2:00 1:00 D
811Rule Halifax 1962 1986 - Apr lastSun 2:00 1:00 D
812Rule Halifax 1962 max - Oct lastSun 2:00 0 S
813Rule Halifax 1987 max - Apr Sun>=1 2:00 1:00 D
814# Zone NAME GMTOFF RULES FORMAT [UNTIL]
815Zone America/Halifax -4:14:24 - LMT 1902 Jun 15
816 -4:00 Halifax A%sT
817Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15
818 -4:00 Canada A%sT 1953
819 -4:00 Halifax A%sT 1954
820 -4:00 - AST 1972
821 -4:00 Halifax A%sT
822
823
824# Ontario, Quebec
825
826# From Paul Eggert (1996-06-12):
827# Shanks writes that since 1970 most of this region has been like Montreal.
828# Thunder Bay skipped DST in 1973.
829# Many smaller locales did not observe peacetime DST until 1974;
830# Nipigon (EST) and Rainy River (CST) are the largest that we know of.
831# Far west Ontario is like Winnipeg; far east Quebec is like Halifax.
832
833# From Paul Eggert (1997-10-17):
834# msb@sq.com writes that an article in the 1997-10-14 Toronto Star
835# says that Atikokan, Ontario currently does not observe DST,
836# but will vote on 11-10 whether to use EST/EDT.
837# He also writes that the
838# <a href="http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html">
839# Ontario Time Act (1990, Chapter T.9)
840# </a>
841# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT.
842# Officially Atikokan is therefore on CST/CDT, and most likely this report
843# concerns a non-official time observed as a matter of local practice.
844# For what it's worth, Shanks says that Atikokan has agreed with
845# Rainy River ever since standard time was introduced.
846
847# From Paul Eggert (2000-10-02):
848# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and
849# New Osnaburgh observe CST all year, that Big Trout Lake observes
850# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in
851# violation of the official Ontario rules.
852# They also write that Quebec east of the -63 meridian is supposed to
853# observe AST, but residents as far east as Natashquan use EST/EDT,
854# and residents east of Natashquan use AST.
855# We probably need Zones for far east Quebec and for Atikokan,
856# but we don't know when their practices started.
857
858# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
859Rule Mont 1917 only - Mar 25 2:00 1:00 D
860Rule Mont 1917 only - Apr 24 0:00 0 S
861Rule Mont 1918 only - Apr 14 2:00 1:00 D
862Rule Mont 1918 only - Oct 31 2:00 0 S
863Rule Mont 1919 only - Mar 31 2:30 1:00 D
864Rule Mont 1919 only - Oct 25 2:30 0 S
865Rule Mont 1920 only - May 2 2:30 1:00 D
866Rule Mont 1920 only - Oct 3 2:30 0 S
867Rule Mont 1921 only - May 1 2:00 1:00 D
868Rule Mont 1921 only - Oct 2 2:30 0 S
869Rule Mont 1922 only - Apr 30 2:00 1:00 D
870Rule Mont 1922 only - Oct 1 2:30 0 S
871Rule Mont 1924 only - May 17 2:00 1:00 D
872Rule Mont 1924 1926 - Sep lastSun 2:30 0 S
873Rule Mont 1925 1926 - May Sun>=1 2:00 1:00 D
874Rule Mont 1927 only - May 1 0:00 1:00 D
875Rule Mont 1927 1932 - Sep Sun>=25 0:00 0 S
876Rule Mont 1928 1931 - Apr Sun>=25 0:00 1:00 D
877Rule Mont 1932 only - May 1 0:00 1:00 D
878Rule Mont 1933 1940 - Apr Sun>=24 0:00 1:00 D
879Rule Mont 1933 only - Oct 1 0:00 0 S
880Rule Mont 1934 1939 - Sep Sun>=24 0:00 0 S
881Rule Mont 1945 1948 - Sep lastSun 2:00 0 S
882Rule Mont 1946 1986 - Apr lastSun 2:00 1:00 D
883Rule Mont 1949 1950 - Oct lastSun 2:00 0 S
884Rule Mont 1951 1956 - Sep lastSun 2:00 0 S
885Rule Mont 1957 max - Oct lastSun 2:00 0 S
886Rule Mont 1987 max - Apr Sun>=1 2:00 1:00 D
887# Zone NAME GMTOFF RULES FORMAT [UNTIL]
888Zone America/Montreal -4:54:16 - LMT 1884
889 -5:00 Mont E%sT
890Zone America/Thunder_Bay -5:57:00 - LMT 1895
891 -5:00 Canada E%sT 1970
892 -5:00 Mont E%sT 1973
893 -5:00 - EST 1974
894 -5:00 Canada E%sT
895Zone America/Nipigon -5:53:04 - LMT 1895
896 -5:00 Canada E%sT
897Zone America/Rainy_River -6:17:56 - LMT 1895
898 -6:00 Canada C%sT
899
900
901# Manitoba
902
903# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
904Rule Winn 1916 only - Apr 23 0:00 1:00 D
905Rule Winn 1916 only - Sep 17 0:00 0 S
906Rule Winn 1918 only - Apr 14 2:00 1:00 D
907Rule Winn 1918 only - Oct 31 2:00 0 S
908Rule Winn 1937 only - May 16 2:00 1:00 D
909Rule Winn 1937 only - Sep 26 2:00 0 S
910Rule Winn 1942 only - Feb 9 2:00 1:00 W
911Rule Winn 1945 only - Sep lastSun 2:00 0 S
912Rule Winn 1946 only - May 12 2:00 1:00 D
913Rule Winn 1946 only - Oct 13 2:00 0 S
914Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D
915Rule Winn 1947 1949 - Sep lastSun 2:00 0 S
916Rule Winn 1950 only - May 1 2:00 1:00 D
917Rule Winn 1950 only - Sep 30 2:00 0 S
918Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D
919Rule Winn 1951 1958 - Sep lastSun 2:00 0 S
920Rule Winn 1959 only - Oct lastSun 2:00 0 S
921Rule Winn 1960 only - Sep lastSun 2:00 0 S
922Rule Winn 1963 only - Apr lastSun 2:00 1:00 D
923Rule Winn 1963 only - Sep 22 2:00 0 S
924Rule Winn 1966 1986 - Apr lastSun 2:00 1:00 D
925Rule Winn 1966 1986 - Oct lastSun 2:00 0 S
926Rule Winn 1987 max - Apr Sun>=1 2:00 1:00 D
927# From Paul Eggert (2000-10-02):
928# INMS (2000-09-12) says that, since 1988 at least, Manitoba switches from
929# DST at 03:00 local time. For now, assume it started in 1987.
930Rule Winn 1987 max - Oct lastSun 2:00s 0 S
931# Zone NAME GMTOFF RULES FORMAT [UNTIL]
932Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16
933 -6:00 Winn C%sT
934
935
936# Saskatchewan
937
938# From Paul Eggert (2000-10-02):
939# Shanks writes that since 1970 most of this region has been like Regina.
940# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972.
941# Other western towns (e.g. Lloydminster) are like Edmonton.
942# Matthews and Vincent (1998) write that Denare Beach and Creighton
943# are like Winnipeg, in violation of Saskatchewan law.
944
945# From W. Jones <jones@skdad.usask.ca> (1992-11-06):
946# The. . .below is based on information I got from our law library, the
947# provincial archives, and the provincial Community Services department.
948# A precise history would require digging through newspaper archives, and
949# since you didn't say what you wanted, I didn't bother.
950#
951# Saskatchewan is split by a time zone meridian (105W) and over the years
952# the boundary became pretty ragged as communities near it reevaluated
953# their affiliations in one direction or the other. In 1965 a provincial
954# referendum favoured legislating common time practices.
955#
956# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of
957# Saskatchewan 1978) was proclaimed, and established that the eastern
958# part of Saskatchewan would use CST year round, that districts in
959# northwest Saskatchewan would by default follow CST but could opt to
960# follow Mountain Time rules (thus 1 hour difference in the winter and
961# zero in the summer), and that districts in southwest Saskatchewan would
962# by default follow MT but could opt to follow CST.
963#
964# It took a few years for the dust to settle (I know one story of a town
965# on one time zone having its school in another, such that a mom had to
966# serve her family lunch in two shifts), but presently it seems that only
967# a few towns on the border with Alberta (e.g. Lloydminster) follow MT
968# rules any more; all other districts appear to have used CST year round
969# since sometime in the 1960s.
970
971# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
972Rule Regina 1918 only - Apr 14 2:00 1:00 D
973Rule Regina 1918 only - Oct 31 2:00 0 S
974Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D
975Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S
976Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D
977Rule Regina 1937 only - Oct Sun>=8 0:00 0 S
978Rule Regina 1938 only - Oct Sun>=1 0:00 0 S
979Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S
980Rule Regina 1942 only - Feb 9 2:00 1:00 W
981Rule Regina 1945 only - Sep lastSun 2:00 0 S
982Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D
983Rule Regina 1946 only - Oct Sun>=8 2:00 0 S
984Rule Regina 1947 1959 - Apr lastSun 2:00 1:00 D
985Rule Regina 1947 1958 - Sep lastSun 2:00 0 S
986Rule Regina 1959 only - Oct lastSun 2:00 0 S
987#
988Rule Swift 1957 only - Apr lastSun 2:00 1:00 D
989Rule Swift 1957 only - Oct lastSun 2:00 0 S
990Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D
991Rule Swift 1959 only - Oct lastSun 2:00 0 S
992Rule Swift 1960 1961 - Sep lastSun 2:00 0 S
993# Zone NAME GMTOFF RULES FORMAT [UNTIL]
994Zone America/Regina -6:58:36 - LMT 1905 Sep
995 -7:00 Regina M%sT 1960 Apr lastSun 2:00
996 -6:00 - CST
997Zone America/Swift_Current -7:11:20 - LMT 1905 Sep
998 -7:00 Canada M%sT 1946 Apr lastSun 2:00
999 -7:00 Regina M%sT 1950
1000 -7:00 Swift M%sT 1972 Apr lastSun 2:00
1001 -6:00 - CST
1002
1003
1004# Alberta
1005
1006# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1007Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D
1008Rule Edm 1918 only - Oct 31 2:00 0 S
1009Rule Edm 1919 only - May 27 2:00 0 S
1010Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D
1011Rule Edm 1920 only - Oct lastSun 2:00 0 S
1012Rule Edm 1921 1923 - Sep lastSun 2:00 0 S
1013Rule Edm 1942 only - Feb 9 2:00 1:00 W
1014Rule Edm 1945 only - Sep lastSun 2:00 0 S
1015Rule Edm 1947 only - Apr lastSun 2:00 1:00 D
1016Rule Edm 1947 only - Sep lastSun 2:00 0 S
1017Rule Edm 1967 only - Apr lastSun 2:00 1:00 D
1018Rule Edm 1967 only - Oct lastSun 2:00 0 S
1019Rule Edm 1969 only - Apr lastSun 2:00 1:00 D
1020Rule Edm 1969 only - Oct lastSun 2:00 0 S
1021Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D
1022Rule Edm 1972 max - Oct lastSun 2:00 0 S
1023Rule Edm 1987 max - Apr Sun>=1 2:00 1:00 D
1024# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1025Zone America/Edmonton -7:33:52 - LMT 1906 Sep
1026 -7:00 Edm M%sT
1027
1028
1029# British Columbia
1030
1031# From Paul Eggert (2000-10-02):
1032# Shanks writes that since 1970 most of this region has been like Vancouver.
1033# Dawson Creek uses MST. Much of east BC is like Edmonton.
1034# Matthews and Vincent (1998) write that Creston is like Dawson Creek.
1035
1036# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1037Rule Vanc 1918 only - Apr 14 2:00 1:00 D
1038Rule Vanc 1918 only - Oct 31 2:00 0 S
1039Rule Vanc 1942 only - Feb 9 2:00 1:00 W
1040Rule Vanc 1945 only - Sep 30 2:00 0 S
1041Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D
1042Rule Vanc 1946 only - Oct 13 2:00 0 S
1043Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S
1044Rule Vanc 1962 max - Oct lastSun 2:00 0 S
1045Rule Vanc 1987 max - Apr Sun>=1 2:00 1:00 D
1046# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1047Zone America/Vancouver -8:12:28 - LMT 1884
1048 -8:00 Vanc P%sT
1049Zone America/Dawson_Creek -8:00:56 - LMT 1884
1050 -8:00 Canada P%sT 1947
1051 -8:00 Vanc P%sT 1972 Aug 30 2:00
1052 -7:00 - MST
1053
1054
1055# Northwest Territories, Nunavut, Yukon
1056
1057# From Paul Eggert (1999-10-29):
1058# Dawson switched to PST in 1973. Inuvik switched to MST in 1979.
1059# Mathew Englander <mathew@io.org> (1996-10-07) gives the following refs:
1060# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68,
1061# c. 7 defines Yukon standard time as UTC-9. This is still valid;
1062# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1).
1063# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00.
1064# * O.I.C. 1980/02 established DST.
1065# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00.
1066# Shanks says Yukon's 1973-10-28 switch was at 2:00; go with Englander.
1067
1068# From Rives McDow (1999-09-04):
1069# Nunavut ... moved ... to incorporate the whole territory into one time zone.
1070# <a href="http://www.nunatsiaq.com/nunavut/nvt90903_13.html">
1071# Nunavut moves to single time zone Oct. 31
1072# </a>
1073#
1074# From Antoine Leca (1999-09-06):
1075# We then need to create a new timezone for the Kitikmeot region of Nunavut
1076# to differentiate it from the Yellowknife region.
1077
1078# From Paul Eggert (1999-09-20):
1079# <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html">
1080# Basic Facts: The New Territory
| 642# for recent time zone data is the International Air Transport
643# Association's Standard Schedules Information Manual (IATA SSIM),
644# published semiannually. Law sent in several helpful summaries
645# of the IATA's data after 1990.
646#
647# Except where otherwise noted, Shanks is the source for entries through 1990,
648# and IATA SSIM is the source for entries after 1990.
649#
650# Another source occasionally used is Edward W. Whitman, World Time Differences,
651# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), which
652# I found in the UCLA library.
653#
654# See the `europe' file for Greenland.
655
656# Canada
657
658# From Alain LaBont<e'> <ALB@immedia.ca> (1994-11-14):
659# I post here the time zone abbreviations standardized in Canada
660# for both English and French in the CAN/CSA-Z234.4-89 standard....
661#
662# UTC Standard time Daylight savings time
663# offset French English French English
664# -2:30 - - HAT NDT
665# -3 - - HAA ADT
666# -3:30 HNT NST - -
667# -4 HNA AST HAE EDT
668# -5 HNE EST HAC CDT
669# -6 HNC CST HAR MDT
670# -7 HNR MST HAP PDT
671# -8 HNP PST HAY YDT
672# -9 HNY YST - -
673#
674# HN: Heure Normale ST: Standard Time
675# HA: Heure Avanc<e'>e DT: Daylight saving Time
676#
677# A: de l'Atlantique Atlantic
678# C: du Centre Central
679# E: de l'Est Eastern
680# M: Mountain
681# N: Newfoundland
682# P: du Pacifique Pacific
683# R: des Rocheuses
684# T: de Terre-Neuve
685# Y: du Yukon Yukon
686#
687# From Paul Eggert <eggert@twinsun.com> (1994-11-22):
688# Alas, this sort of thing must be handled by localization software.
689
690# Unless otherwise specified, the data for Canada are all from Shanks.
691
692# From Paul Eggert (2000-10-02):
693# H. David Matthews and Mary Vincent's map
694# <a href="http://www.canadiangeographic.ca/SO98/geomap.htm">
695# "It's about TIME", _Canadian Geographic_ (September-October 1998)
696# </a> contains detailed boundaries for regions observing nonstandard
697# time and daylight saving time arrangements in Canada circa 1998.
698#
699# INMS, the Institute for National Measurement Standards in Ottawa, has
700# <a href="http://www.nrc.ca/inms/time/tze.html">
701# information about standard and daylight saving time zones in Canada.
702# </a> (updated periodically).
703# Its unofficial information is often taken from Matthews and Vincent.
704
705# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
706Rule Canada 1918 only - Apr 14 2:00 1:00 D
707Rule Canada 1918 only - Oct 31 2:00 0 S
708Rule Canada 1942 only - Feb 9 2:00 1:00 W
709Rule Canada 1945 only - Sep 30 2:00 0 S
710Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D
711Rule Canada 1974 max - Oct lastSun 2:00 0 S
712Rule Canada 1987 max - Apr Sun>=1 2:00 1:00 D
713
714
715# Newfoundland (and far southeast Labrador)
716
717# From Paul Eggert (2000-10-02):
718# Matthews and Vincent (1998) write that Labrador should use NST/NDT,
719# but the only part of Labrador that follows the rules is the
720# southeast corner, including Port Hope Simpson and Mary's Harbour,
721# but excluding, say, Black Tickle.
722
723# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
724Rule StJohns 1917 1918 - Apr Sun>=8 2:00 1:00 D
725Rule StJohns 1917 only - Sep 17 2:00 0 S
726Rule StJohns 1918 only - Oct 31 2:00 0 S
727# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks.
728Rule StJohns 1919 only - May 5 23:00 1:00 D
729Rule StJohns 1919 only - Aug 12 23:00 0 S
730# For 1931-1935 Whitman gives Apr same date; go with Shanks.
731Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D
732Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S
733# For 1936-1941 Shanks gives May Mon>=9 and Oct Mon>=2; go with Whitman.
734Rule StJohns 1936 1941 - May Sun>=8 0:00 1:00 D
735Rule StJohns 1936 1941 - Oct Sun>=1 0:00 0 S
736# Shanks gives 1942 May 11 - 1945 Sep 30; go with Whitman.
737Rule StJohns 1942 only - Mar 1 0:00 1:00 W
738Rule StJohns 1942 only - Dec 31 0:00 0 S
739Rule StJohns 1943 only - May 30 0:00 1:00 W
740Rule StJohns 1943 only - Sep 5 0:00 0 S
741Rule StJohns 1944 only - Jul 10 0:00 1:00 W
742Rule StJohns 1944 only - Sep 2 0:00 0 S
743Rule StJohns 1945 only - Jan 1 0:00 1:00 W
744Rule StJohns 1945 only - Oct 7 2:00 0 S
745# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives
746# Apr 30 - Sep 24; go with Shanks.
747Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D
748Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S
749Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D
750Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S
751Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S
752# From Paul Eggert (2000-10-02):
753# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches
754# at 00:01 local time. For now, assume it started in 1987.
755Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D
756Rule StJohns 1987 max - Oct lastSun 0:01 0 S
757Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD
758Rule StJohns 1989 max - Apr Sun>=1 0:01 1:00 D
759# St John's has an apostrophe, but Posix file names can't have apostrophes.
760# Zone NAME GMTOFF RULES FORMAT [UNTIL]
761Zone America/St_Johns -3:30:52 - LMT 1884
762 -3:30:52 StJohns N%sT 1935 Mar 30
763 -3:30 StJohns N%sT
764
765
766# most of east Labrador
767
768# The name `Happy Valley-Goose Bay' is too long; use `Goose Bay'.
769# Zone NAME GMTOFF RULES FORMAT [UNTIL]
770Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay
771 -3:30:52 StJohns NST 1919
772 -3:30:52 - NST 1935 Mar 30
773 -3:30 - NST 1936
774 -3:30 StJohns N%sT 1966 Mar 15 2:00
775 -4:00 StJohns A%sT
776
777
778# west Labrador, New Brunswick, Nova Scotia, Prince Edward I
779
780# From Paul Eggert (1996-06-12):
781# Shanks writes that since 1970 most of this region has been like Halifax.
782# Many locales did not observe peacetime DST until 1972;
783# Glace Bay, NS is the largest that we know of.
784# Shanks also writes that Liverpool, NS was the only town in Canada to observe
785# DST in 1971 but not 1970; for now we'll assume this is a typo.
786
787# From Paul Eggert (2000-10-02):
788# INMS (2000-09-12) says that, since 1988 at least, New Brunswick switches
789# at 00:01 local time. FIXME: verify and create a new Zone for this.
790
791
792# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
793Rule Halifax 1916 only - Apr 1 0:00 1:00 D
794Rule Halifax 1916 only - Oct 1 0:00 0 S
795Rule Halifax 1918 only - Apr 14 2:00 1:00 D
796Rule Halifax 1918 only - Oct 31 2:00 0 S
797Rule Halifax 1920 only - May 9 0:00 1:00 D
798Rule Halifax 1920 only - Aug 29 0:00 0 S
799Rule Halifax 1921 only - May 6 0:00 1:00 D
800Rule Halifax 1921 1922 - Sep 5 0:00 0 S
801Rule Halifax 1922 only - Apr 30 0:00 1:00 D
802Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D
803Rule Halifax 1923 only - Sep 4 0:00 0 S
804Rule Halifax 1924 only - Sep 15 0:00 0 S
805Rule Halifax 1925 only - Sep 28 0:00 0 S
806Rule Halifax 1926 only - May 16 0:00 1:00 D
807Rule Halifax 1926 only - Sep 13 0:00 0 S
808Rule Halifax 1927 only - May 1 0:00 1:00 D
809Rule Halifax 1927 only - Sep 26 0:00 0 S
810Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D
811Rule Halifax 1928 only - Sep 9 0:00 0 S
812Rule Halifax 1929 only - Sep 3 0:00 0 S
813Rule Halifax 1930 only - Sep 15 0:00 0 S
814Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S
815Rule Halifax 1933 only - Apr 30 0:00 1:00 D
816Rule Halifax 1933 only - Oct 2 0:00 0 S
817Rule Halifax 1934 only - May 20 0:00 1:00 D
818Rule Halifax 1934 only - Sep 16 0:00 0 S
819Rule Halifax 1935 only - Jun 2 0:00 1:00 D
820Rule Halifax 1935 only - Sep 30 0:00 0 S
821Rule Halifax 1936 only - Jun 1 0:00 1:00 D
822Rule Halifax 1936 only - Sep 14 0:00 0 S
823Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D
824Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S
825Rule Halifax 1939 only - May 28 0:00 1:00 D
826Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D
827Rule Halifax 1942 only - Feb 9 2:00 1:00 W
828Rule Halifax 1945 1959 - Sep lastSun 2:00 0 S
829Rule Halifax 1946 1959 - Apr lastSun 2:00 1:00 D
830Rule Halifax 1962 1986 - Apr lastSun 2:00 1:00 D
831Rule Halifax 1962 max - Oct lastSun 2:00 0 S
832Rule Halifax 1987 max - Apr Sun>=1 2:00 1:00 D
833# Zone NAME GMTOFF RULES FORMAT [UNTIL]
834Zone America/Halifax -4:14:24 - LMT 1902 Jun 15
835 -4:00 Halifax A%sT
836Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15
837 -4:00 Canada A%sT 1953
838 -4:00 Halifax A%sT 1954
839 -4:00 - AST 1972
840 -4:00 Halifax A%sT
841
842
843# Ontario, Quebec
844
845# From Paul Eggert (1996-06-12):
846# Shanks writes that since 1970 most of this region has been like Montreal.
847# Thunder Bay skipped DST in 1973.
848# Many smaller locales did not observe peacetime DST until 1974;
849# Nipigon (EST) and Rainy River (CST) are the largest that we know of.
850# Far west Ontario is like Winnipeg; far east Quebec is like Halifax.
851
852# From Paul Eggert (1997-10-17):
853# msb@sq.com writes that an article in the 1997-10-14 Toronto Star
854# says that Atikokan, Ontario currently does not observe DST,
855# but will vote on 11-10 whether to use EST/EDT.
856# He also writes that the
857# <a href="http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html">
858# Ontario Time Act (1990, Chapter T.9)
859# </a>
860# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT.
861# Officially Atikokan is therefore on CST/CDT, and most likely this report
862# concerns a non-official time observed as a matter of local practice.
863# For what it's worth, Shanks says that Atikokan has agreed with
864# Rainy River ever since standard time was introduced.
865
866# From Paul Eggert (2000-10-02):
867# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and
868# New Osnaburgh observe CST all year, that Big Trout Lake observes
869# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in
870# violation of the official Ontario rules.
871# They also write that Quebec east of the -63 meridian is supposed to
872# observe AST, but residents as far east as Natashquan use EST/EDT,
873# and residents east of Natashquan use AST.
874# We probably need Zones for far east Quebec and for Atikokan,
875# but we don't know when their practices started.
876
877# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
878Rule Mont 1917 only - Mar 25 2:00 1:00 D
879Rule Mont 1917 only - Apr 24 0:00 0 S
880Rule Mont 1918 only - Apr 14 2:00 1:00 D
881Rule Mont 1918 only - Oct 31 2:00 0 S
882Rule Mont 1919 only - Mar 31 2:30 1:00 D
883Rule Mont 1919 only - Oct 25 2:30 0 S
884Rule Mont 1920 only - May 2 2:30 1:00 D
885Rule Mont 1920 only - Oct 3 2:30 0 S
886Rule Mont 1921 only - May 1 2:00 1:00 D
887Rule Mont 1921 only - Oct 2 2:30 0 S
888Rule Mont 1922 only - Apr 30 2:00 1:00 D
889Rule Mont 1922 only - Oct 1 2:30 0 S
890Rule Mont 1924 only - May 17 2:00 1:00 D
891Rule Mont 1924 1926 - Sep lastSun 2:30 0 S
892Rule Mont 1925 1926 - May Sun>=1 2:00 1:00 D
893Rule Mont 1927 only - May 1 0:00 1:00 D
894Rule Mont 1927 1932 - Sep Sun>=25 0:00 0 S
895Rule Mont 1928 1931 - Apr Sun>=25 0:00 1:00 D
896Rule Mont 1932 only - May 1 0:00 1:00 D
897Rule Mont 1933 1940 - Apr Sun>=24 0:00 1:00 D
898Rule Mont 1933 only - Oct 1 0:00 0 S
899Rule Mont 1934 1939 - Sep Sun>=24 0:00 0 S
900Rule Mont 1945 1948 - Sep lastSun 2:00 0 S
901Rule Mont 1946 1986 - Apr lastSun 2:00 1:00 D
902Rule Mont 1949 1950 - Oct lastSun 2:00 0 S
903Rule Mont 1951 1956 - Sep lastSun 2:00 0 S
904Rule Mont 1957 max - Oct lastSun 2:00 0 S
905Rule Mont 1987 max - Apr Sun>=1 2:00 1:00 D
906# Zone NAME GMTOFF RULES FORMAT [UNTIL]
907Zone America/Montreal -4:54:16 - LMT 1884
908 -5:00 Mont E%sT
909Zone America/Thunder_Bay -5:57:00 - LMT 1895
910 -5:00 Canada E%sT 1970
911 -5:00 Mont E%sT 1973
912 -5:00 - EST 1974
913 -5:00 Canada E%sT
914Zone America/Nipigon -5:53:04 - LMT 1895
915 -5:00 Canada E%sT
916Zone America/Rainy_River -6:17:56 - LMT 1895
917 -6:00 Canada C%sT
918
919
920# Manitoba
921
922# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
923Rule Winn 1916 only - Apr 23 0:00 1:00 D
924Rule Winn 1916 only - Sep 17 0:00 0 S
925Rule Winn 1918 only - Apr 14 2:00 1:00 D
926Rule Winn 1918 only - Oct 31 2:00 0 S
927Rule Winn 1937 only - May 16 2:00 1:00 D
928Rule Winn 1937 only - Sep 26 2:00 0 S
929Rule Winn 1942 only - Feb 9 2:00 1:00 W
930Rule Winn 1945 only - Sep lastSun 2:00 0 S
931Rule Winn 1946 only - May 12 2:00 1:00 D
932Rule Winn 1946 only - Oct 13 2:00 0 S
933Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D
934Rule Winn 1947 1949 - Sep lastSun 2:00 0 S
935Rule Winn 1950 only - May 1 2:00 1:00 D
936Rule Winn 1950 only - Sep 30 2:00 0 S
937Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D
938Rule Winn 1951 1958 - Sep lastSun 2:00 0 S
939Rule Winn 1959 only - Oct lastSun 2:00 0 S
940Rule Winn 1960 only - Sep lastSun 2:00 0 S
941Rule Winn 1963 only - Apr lastSun 2:00 1:00 D
942Rule Winn 1963 only - Sep 22 2:00 0 S
943Rule Winn 1966 1986 - Apr lastSun 2:00 1:00 D
944Rule Winn 1966 1986 - Oct lastSun 2:00 0 S
945Rule Winn 1987 max - Apr Sun>=1 2:00 1:00 D
946# From Paul Eggert (2000-10-02):
947# INMS (2000-09-12) says that, since 1988 at least, Manitoba switches from
948# DST at 03:00 local time. For now, assume it started in 1987.
949Rule Winn 1987 max - Oct lastSun 2:00s 0 S
950# Zone NAME GMTOFF RULES FORMAT [UNTIL]
951Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16
952 -6:00 Winn C%sT
953
954
955# Saskatchewan
956
957# From Paul Eggert (2000-10-02):
958# Shanks writes that since 1970 most of this region has been like Regina.
959# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972.
960# Other western towns (e.g. Lloydminster) are like Edmonton.
961# Matthews and Vincent (1998) write that Denare Beach and Creighton
962# are like Winnipeg, in violation of Saskatchewan law.
963
964# From W. Jones <jones@skdad.usask.ca> (1992-11-06):
965# The. . .below is based on information I got from our law library, the
966# provincial archives, and the provincial Community Services department.
967# A precise history would require digging through newspaper archives, and
968# since you didn't say what you wanted, I didn't bother.
969#
970# Saskatchewan is split by a time zone meridian (105W) and over the years
971# the boundary became pretty ragged as communities near it reevaluated
972# their affiliations in one direction or the other. In 1965 a provincial
973# referendum favoured legislating common time practices.
974#
975# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of
976# Saskatchewan 1978) was proclaimed, and established that the eastern
977# part of Saskatchewan would use CST year round, that districts in
978# northwest Saskatchewan would by default follow CST but could opt to
979# follow Mountain Time rules (thus 1 hour difference in the winter and
980# zero in the summer), and that districts in southwest Saskatchewan would
981# by default follow MT but could opt to follow CST.
982#
983# It took a few years for the dust to settle (I know one story of a town
984# on one time zone having its school in another, such that a mom had to
985# serve her family lunch in two shifts), but presently it seems that only
986# a few towns on the border with Alberta (e.g. Lloydminster) follow MT
987# rules any more; all other districts appear to have used CST year round
988# since sometime in the 1960s.
989
990# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
991Rule Regina 1918 only - Apr 14 2:00 1:00 D
992Rule Regina 1918 only - Oct 31 2:00 0 S
993Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D
994Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S
995Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D
996Rule Regina 1937 only - Oct Sun>=8 0:00 0 S
997Rule Regina 1938 only - Oct Sun>=1 0:00 0 S
998Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S
999Rule Regina 1942 only - Feb 9 2:00 1:00 W
1000Rule Regina 1945 only - Sep lastSun 2:00 0 S
1001Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D
1002Rule Regina 1946 only - Oct Sun>=8 2:00 0 S
1003Rule Regina 1947 1959 - Apr lastSun 2:00 1:00 D
1004Rule Regina 1947 1958 - Sep lastSun 2:00 0 S
1005Rule Regina 1959 only - Oct lastSun 2:00 0 S
1006#
1007Rule Swift 1957 only - Apr lastSun 2:00 1:00 D
1008Rule Swift 1957 only - Oct lastSun 2:00 0 S
1009Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D
1010Rule Swift 1959 only - Oct lastSun 2:00 0 S
1011Rule Swift 1960 1961 - Sep lastSun 2:00 0 S
1012# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1013Zone America/Regina -6:58:36 - LMT 1905 Sep
1014 -7:00 Regina M%sT 1960 Apr lastSun 2:00
1015 -6:00 - CST
1016Zone America/Swift_Current -7:11:20 - LMT 1905 Sep
1017 -7:00 Canada M%sT 1946 Apr lastSun 2:00
1018 -7:00 Regina M%sT 1950
1019 -7:00 Swift M%sT 1972 Apr lastSun 2:00
1020 -6:00 - CST
1021
1022
1023# Alberta
1024
1025# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1026Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D
1027Rule Edm 1918 only - Oct 31 2:00 0 S
1028Rule Edm 1919 only - May 27 2:00 0 S
1029Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D
1030Rule Edm 1920 only - Oct lastSun 2:00 0 S
1031Rule Edm 1921 1923 - Sep lastSun 2:00 0 S
1032Rule Edm 1942 only - Feb 9 2:00 1:00 W
1033Rule Edm 1945 only - Sep lastSun 2:00 0 S
1034Rule Edm 1947 only - Apr lastSun 2:00 1:00 D
1035Rule Edm 1947 only - Sep lastSun 2:00 0 S
1036Rule Edm 1967 only - Apr lastSun 2:00 1:00 D
1037Rule Edm 1967 only - Oct lastSun 2:00 0 S
1038Rule Edm 1969 only - Apr lastSun 2:00 1:00 D
1039Rule Edm 1969 only - Oct lastSun 2:00 0 S
1040Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D
1041Rule Edm 1972 max - Oct lastSun 2:00 0 S
1042Rule Edm 1987 max - Apr Sun>=1 2:00 1:00 D
1043# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1044Zone America/Edmonton -7:33:52 - LMT 1906 Sep
1045 -7:00 Edm M%sT
1046
1047
1048# British Columbia
1049
1050# From Paul Eggert (2000-10-02):
1051# Shanks writes that since 1970 most of this region has been like Vancouver.
1052# Dawson Creek uses MST. Much of east BC is like Edmonton.
1053# Matthews and Vincent (1998) write that Creston is like Dawson Creek.
1054
1055# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1056Rule Vanc 1918 only - Apr 14 2:00 1:00 D
1057Rule Vanc 1918 only - Oct 31 2:00 0 S
1058Rule Vanc 1942 only - Feb 9 2:00 1:00 W
1059Rule Vanc 1945 only - Sep 30 2:00 0 S
1060Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D
1061Rule Vanc 1946 only - Oct 13 2:00 0 S
1062Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S
1063Rule Vanc 1962 max - Oct lastSun 2:00 0 S
1064Rule Vanc 1987 max - Apr Sun>=1 2:00 1:00 D
1065# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1066Zone America/Vancouver -8:12:28 - LMT 1884
1067 -8:00 Vanc P%sT
1068Zone America/Dawson_Creek -8:00:56 - LMT 1884
1069 -8:00 Canada P%sT 1947
1070 -8:00 Vanc P%sT 1972 Aug 30 2:00
1071 -7:00 - MST
1072
1073
1074# Northwest Territories, Nunavut, Yukon
1075
1076# From Paul Eggert (1999-10-29):
1077# Dawson switched to PST in 1973. Inuvik switched to MST in 1979.
1078# Mathew Englander <mathew@io.org> (1996-10-07) gives the following refs:
1079# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68,
1080# c. 7 defines Yukon standard time as UTC-9. This is still valid;
1081# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1).
1082# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00.
1083# * O.I.C. 1980/02 established DST.
1084# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00.
1085# Shanks says Yukon's 1973-10-28 switch was at 2:00; go with Englander.
1086
1087# From Rives McDow (1999-09-04):
1088# Nunavut ... moved ... to incorporate the whole territory into one time zone.
1089# <a href="http://www.nunatsiaq.com/nunavut/nvt90903_13.html">
1090# Nunavut moves to single time zone Oct. 31
1091# </a>
1092#
1093# From Antoine Leca (1999-09-06):
1094# We then need to create a new timezone for the Kitikmeot region of Nunavut
1095# to differentiate it from the Yellowknife region.
1096
1097# From Paul Eggert (1999-09-20):
1098# <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html">
1099# Basic Facts: The New Territory
|
1081# </a> (1999) reports that Pangnirtung operates on Eastern time,
| 1100# </a> (1999) reports that Pangnirtung operates on eastern time,
|
1082# and that Coral Harbour does not observe DST. We don't know when
| 1101# and that Coral Harbour does not observe DST. We don't know when
|
1083# Pangnirtung switched to Eastern time; we'll guess 1995.
| 1102# Pangnirtung switched to eastern time; we'll guess 1995.
|
1084# We'll ignore the claim about Coral Harbour for now,
1085# since we have no further info.
1086
1087# From Rives McDow (1999-11-08):
1088# On October 31, when the rest of Nunavut went to Central time,
1089# Pangnirtung wobbled. Here is the result of their wobble:
1090#
1091# The following businesses and organizations in Pangnirtung use Central Time:
1092#
1093# First Air, Power Corp, Nunavut Construction, Health Center, RCMP,
1094# Eastern Arctic National Parks, A & D Specialist
1095#
1096# The following businesses and organizations in Pangnirtung use Eastern Time:
1097#
1098# Hamlet office, All other businesses, Both schools, Airport operator
1099#
1100# This has made for an interesting situation there, which warranted the news.
1101# No one there that I spoke with seems concerned, or has plans to
1102# change the local methods of keeping time, as it evidently does not
1103# really interfere with any activities or make things difficult locally.
1104# They plan to celebrate New Year's turn-over twice, one hour apart,
1105# so it appears that the situation will last at least that long.
1106# The Nunavut Intergovernmental Affairs hopes that they will "come to
1107# their senses", but the locals evidently don't see any problem with
1108# the current state of affairs.
1109
1110# From Michaela Rodrigue, writing in the
1111# <a href="http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html">
1112# Nunatsiaq News (1999-11-19)</a>:
1113# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones,
1114# central - or Nunavut time - for government offices, and eastern time
1115# for municipal offices and schools.... Igloolik [was similar but then]
1116# made the switch to central time on Saturday, Nov. 6.
1117
1118# From Paul Eggert (2000-10-02):
1119# Matthews and Vincent (1998) say the following, but we lack histories
1120# for these potential new Zones.
1121#
1122# The Canadian Forces station at Alert uses Eastern Time while the
1123# handful of residents at the Eureka weather station [in the Central
1124# zone] skip daylight savings. Baffin Island, which is crossed by the
1125# Central, Eastern and Atlantic Time zones only uses Eastern Time.
1126# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of
1127# Central Time and Southampton Island [in the Central zone] is not
1128# required to use daylight savings.
1129
1130# From
1131# <a href="http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html">
1132# Nunavut now has two time zones
1133# </a> (2000-11-10):
1134# The Nunavut government would allow its employees in Kugluktuk and
1135# Cambridge Bay to operate on central time year-round, putting them
1136# one hour behind the rest of Nunavut for six months during the winter.
1137# At the end of October the two communities had rebelled against
1138# Nunavut's unified time zone, refusing to shift to eastern time with
1139# the rest of the territory for the winter. Cambridge Bay remained on
1140# central time, while Kugluktuk, even farther west, reverted to
1141# mountain time, which they had used before the advent of Nunavut's
1142# unified time zone in 1999.
1143#
1144# From Rives McDow (2001-01-20), quoting the Nunavut government:
1145# The preceding decision came into effect at midnight, Saturday Nov 4, 2000.
1146
1147# From Paul Eggert (2000-12-04):
1148# Let's just keep track of the official times for now.
1149
1150# From Rives McDow (2001-03-07):
1151# The premier of Nunavut has issued a ministerial statement advising
1152# that effective 2001-04-01, the territory of Nunavut will revert
1153# back to three time zones (mountain, central, and eastern). Of the
1154# cities in Nunavut, Coral Harbor is the only one that I know of that
1155# has said it will not observe dst, staying on EST year round. I'm
1156# checking for more info, and will get back to you if I come up with
1157# more.
1158# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).]
1159
1160# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1161Rule NT_YK 1918 only - Apr 14 2:00 1:00 D
1162Rule NT_YK 1918 only - Oct 27 2:00 0 S
1163Rule NT_YK 1919 only - May 25 2:00 1:00 D
1164Rule NT_YK 1919 only - Nov 1 0:00 0 S
1165Rule NT_YK 1942 only - Feb 9 2:00 1:00 W
1166Rule NT_YK 1945 only - Sep 30 2:00 0 S
1167Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD
1168Rule NT_YK 1965 only - Oct lastSun 2:00 0 S
1169Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D
1170Rule NT_YK 1980 max - Oct lastSun 2:00 0 S
1171Rule NT_YK 1987 max - Apr Sun>=1 2:00 1:00 D
1172# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1173Zone America/Pangnirtung -4:22:56 - LMT 1884
1174 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00
1175 -5:00 Canada E%sT 1999 Oct 31 2:00
1176 -6:00 Canada C%sT 2000 Oct 29 2:00
1177 -5:00 Canada E%sT
1178Zone America/Iqaluit -4:33:52 - LMT 1884 # Frobisher Bay before 1987
1179 -5:00 NT_YK E%sT 1999 Oct 31 2:00
1180 -6:00 Canada C%sT 2000 Oct 29 2:00
1181 -5:00 Canada E%sT
1182Zone America/Rankin_Inlet -6:08:40 - LMT 1884
1183 -6:00 NT_YK C%sT 2000 Oct 29 2:00
1184 -5:00 - EST 2001 Apr 1 3:00
1185 -6:00 Canada C%sT
1186Zone America/Cambridge_Bay -7:00:20 - LMT 1884
1187 -7:00 NT_YK M%sT 1999 Oct 31 2:00
1188 -6:00 Canada C%sT 2000 Oct 29 2:00
1189 -5:00 - EST 2000 Nov 5 0:00
1190 -6:00 - CST 2001 Apr 1 3:00
1191 -7:00 Canada M%sT
1192Zone America/Yellowknife -7:37:24 - LMT 1884
1193 -7:00 NT_YK M%sT
1194Zone America/Inuvik -8:54:00 - LMT 1884
1195 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00
1196 -7:00 NT_YK M%sT
1197Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20
1198 -9:00 NT_YK Y%sT 1966 Jul 1 2:00
1199 -8:00 NT_YK P%sT
1200Zone America/Dawson -9:17:40 - LMT 1900 Aug 20
1201 -9:00 NT_YK Y%sT 1973 Oct 28 0:00
1202 -8:00 NT_YK P%sT
1203
1204
1205###############################################################################
1206
1207# Mexico
1208
1209# From Paul Eggert (2001-03-05):
1210# The Investigation and Analysis Service of the
1211# Mexican Library of Congress (MLoC) has published a
1212# <a href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/">
1213# history of Mexican local time (in Spanish)
1214# </a>.
1215#
1216# Here are the discrepancies between Shanks and the MLoC.
1217# (In all cases we go with the MLoC.)
1218# Shanks reports that Baja was at -8:00 in 1922/1923.
1219# Shanks says the 1930 transition in Baja was 1930-11-16.
1220# Shanks reports no DST during summer 1931.
1221# Shanks reports a transition at 1032-03-30 23:00, not 1932-04-01.
1222# Shanks does not report transitions for Baja in 1945 or 1948.
1223# Shanks reports southern Mexico transitions on 1981-12-01, not 12-23.
1224# Shanks says Quintana Roo switched to -6:00 on 1982-12-02, and to -5:00
1225# on 1997-10-26 at 02:00.
1226
1227# From Gwillim Law (2001-02-20):
1228# There are some other discrepancies between the Decrees page and the
1229# tz database. I think they can best be explained by supposing that
1230# the researchers who prepared the Decrees page failed to find some of
1231# the relevant documents.
1232
1233# From Paul Eggert (2000-07-26):
1234# Shanks gives 1942-04-01 instead of 1942-04-24, and omits the 1981
1235# and 1988 DST experiments. Go with spin.com.mx.
1236
1237# From Alan Perry <alan.perry@eng.sun.com> (1996-02-15):
1238# A guy from our Mexico subsidiary finally found the Presidential Decree
1239# outlining the timezone changes in Mexico.
1240#
1241# ------------- Begin Forwarded Message -------------
1242#
1243# I finally got my hands on the Official Presidential Decree that sets up the
1244# rules for the DST changes. The rules are:
1245#
1246# 1. The country is divided in 3 timezones:
1247# - Baja California Norte (the Mexico/BajaNorte TZ)
1248# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ)
1249# - The rest of the country (the Mexico/General TZ)
1250#
1251# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October
1252# at 2:00 AM, the times in each zone are as follows:
1253# BajaNorte: GMT+7
1254# BajaSur: GMT+6
1255# General: GMT+5
1256#
1257# 3. The rest of the year, the times are as follows:
1258# BajaNorte: GMT+8
1259# BajaSur: GMT+7
1260# General: GMT+6
1261#
1262# The Decree was published in Mexico's Official Newspaper on January 4th.
1263#
1264# -------------- End Forwarded Message --------------
1265# From Paul Eggert (1996-06-12):
1266# For an English translation of the decree, see
1267# <a href="http://mexico-travel.com/extra/timezone_eng.html">
1268# ``Diario Oficial: Time Zone Changeover'' (1996-01-04).
1269# </a>
1270
1271# From Rives McDow (1998-10-08):
1272# The State of Quintana Roo has reverted back to central STD and DST times
1273# (i.e. UTC -0600 and -0500 as of 1998-08-02).
1274
1275# From Rives McDow (2000-01-10):
1276# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time
1277# zone 5 hours from the International Date Line, and will not observe daylight
1278# savings time so as to stay on the same time zone as the southern part of
1279# Arizona year round.
1280
1281# From Jesper Norgaard, translating
1282# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17):
1283# In Oaxaca, the 55.000 teachers from the Section 22 of the National
1284# Syndicate of Education Workers, refuse to apply daylight saving each
1285# year, so that the more than 10,000 schools work at normal hour the
1286# whole year.
1287
1288# From Gwillim Law (2001-01-19):
1289# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says
1290# (translated):...
1291# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced
1292# that Summer Time will be reduced from seven to five months, starting
1293# this year....
1294# <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001>
1295# [translated], says "summer time will ... take effect on the first Sunday
1296# in May, and end on the last Sunday of September.
1297
1298# From Arthur David Olson (2001-01-25):
1299# The 2001-01-24 traditional Washington Post contained the page one
1300# story "Timely Issue Divides Mexicans."...
1301# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html
1302# ... Mexico City Mayor Lopez Obrador "...is threatening to keep
1303# Mexico City and its 20 million residents on a different time than
1304# the rest of the country..." In particular, Lopez Obrador would abolish
1305# observation of Daylight Saving Time.
1306
1307# <a href="http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre">
1308# Official statute published by the Energy Department
1309# </a> (2001-02-01) shows Baja and Chihauhua as still using US DST rules,
1310# and Sonora with no DST. This was reported by Jesper Norgaard (2001-02-03).
1311
1312# From Paul Eggert (2001-03-03):
1313#
1314# <a href="http://www.latimes.com/news/nation/20010303/t000018766.html">
1315# James F. Smith writes in today's LA Times
1316# </a>
1317# * Sonora will continue to observe standard time.
1318# * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that
1319# the Federal District will not adopt DST.
1320# * 4 of 16 district leaders announced they'll ignore the decree.
1321# * The decree does not affect federal-controlled facilities including
1322# the airport, banks, hospitals, and schools.
1323#
1324# For now we'll assume that the Federal District will bow to federal rules.
1325
1326# From Jesper Norgaard (2001-04-01):
1327# I found some references to the Mexican application of daylight
1328# saving, which modifies what I had already sent you, stating earlier
1329# that a number of northern Mexican states would go on daylight
1330# saving. The modification reverts this to only cover Baja California
1331# (Norte), while all other states (except Sonora, who has no daylight
1332# saving all year) will follow the original decree of president
1333# Vicente Fox, starting daylight saving May 6, 2001 and ending
1334# September 30, 2001.
1335# References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp>
1336# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31)
1337
| 1103# We'll ignore the claim about Coral Harbour for now,
1104# since we have no further info.
1105
1106# From Rives McDow (1999-11-08):
1107# On October 31, when the rest of Nunavut went to Central time,
1108# Pangnirtung wobbled. Here is the result of their wobble:
1109#
1110# The following businesses and organizations in Pangnirtung use Central Time:
1111#
1112# First Air, Power Corp, Nunavut Construction, Health Center, RCMP,
1113# Eastern Arctic National Parks, A & D Specialist
1114#
1115# The following businesses and organizations in Pangnirtung use Eastern Time:
1116#
1117# Hamlet office, All other businesses, Both schools, Airport operator
1118#
1119# This has made for an interesting situation there, which warranted the news.
1120# No one there that I spoke with seems concerned, or has plans to
1121# change the local methods of keeping time, as it evidently does not
1122# really interfere with any activities or make things difficult locally.
1123# They plan to celebrate New Year's turn-over twice, one hour apart,
1124# so it appears that the situation will last at least that long.
1125# The Nunavut Intergovernmental Affairs hopes that they will "come to
1126# their senses", but the locals evidently don't see any problem with
1127# the current state of affairs.
1128
1129# From Michaela Rodrigue, writing in the
1130# <a href="http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html">
1131# Nunatsiaq News (1999-11-19)</a>:
1132# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones,
1133# central - or Nunavut time - for government offices, and eastern time
1134# for municipal offices and schools.... Igloolik [was similar but then]
1135# made the switch to central time on Saturday, Nov. 6.
1136
1137# From Paul Eggert (2000-10-02):
1138# Matthews and Vincent (1998) say the following, but we lack histories
1139# for these potential new Zones.
1140#
1141# The Canadian Forces station at Alert uses Eastern Time while the
1142# handful of residents at the Eureka weather station [in the Central
1143# zone] skip daylight savings. Baffin Island, which is crossed by the
1144# Central, Eastern and Atlantic Time zones only uses Eastern Time.
1145# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of
1146# Central Time and Southampton Island [in the Central zone] is not
1147# required to use daylight savings.
1148
1149# From
1150# <a href="http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html">
1151# Nunavut now has two time zones
1152# </a> (2000-11-10):
1153# The Nunavut government would allow its employees in Kugluktuk and
1154# Cambridge Bay to operate on central time year-round, putting them
1155# one hour behind the rest of Nunavut for six months during the winter.
1156# At the end of October the two communities had rebelled against
1157# Nunavut's unified time zone, refusing to shift to eastern time with
1158# the rest of the territory for the winter. Cambridge Bay remained on
1159# central time, while Kugluktuk, even farther west, reverted to
1160# mountain time, which they had used before the advent of Nunavut's
1161# unified time zone in 1999.
1162#
1163# From Rives McDow (2001-01-20), quoting the Nunavut government:
1164# The preceding decision came into effect at midnight, Saturday Nov 4, 2000.
1165
1166# From Paul Eggert (2000-12-04):
1167# Let's just keep track of the official times for now.
1168
1169# From Rives McDow (2001-03-07):
1170# The premier of Nunavut has issued a ministerial statement advising
1171# that effective 2001-04-01, the territory of Nunavut will revert
1172# back to three time zones (mountain, central, and eastern). Of the
1173# cities in Nunavut, Coral Harbor is the only one that I know of that
1174# has said it will not observe dst, staying on EST year round. I'm
1175# checking for more info, and will get back to you if I come up with
1176# more.
1177# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).]
1178
1179# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1180Rule NT_YK 1918 only - Apr 14 2:00 1:00 D
1181Rule NT_YK 1918 only - Oct 27 2:00 0 S
1182Rule NT_YK 1919 only - May 25 2:00 1:00 D
1183Rule NT_YK 1919 only - Nov 1 0:00 0 S
1184Rule NT_YK 1942 only - Feb 9 2:00 1:00 W
1185Rule NT_YK 1945 only - Sep 30 2:00 0 S
1186Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD
1187Rule NT_YK 1965 only - Oct lastSun 2:00 0 S
1188Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D
1189Rule NT_YK 1980 max - Oct lastSun 2:00 0 S
1190Rule NT_YK 1987 max - Apr Sun>=1 2:00 1:00 D
1191# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1192Zone America/Pangnirtung -4:22:56 - LMT 1884
1193 -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00
1194 -5:00 Canada E%sT 1999 Oct 31 2:00
1195 -6:00 Canada C%sT 2000 Oct 29 2:00
1196 -5:00 Canada E%sT
1197Zone America/Iqaluit -4:33:52 - LMT 1884 # Frobisher Bay before 1987
1198 -5:00 NT_YK E%sT 1999 Oct 31 2:00
1199 -6:00 Canada C%sT 2000 Oct 29 2:00
1200 -5:00 Canada E%sT
1201Zone America/Rankin_Inlet -6:08:40 - LMT 1884
1202 -6:00 NT_YK C%sT 2000 Oct 29 2:00
1203 -5:00 - EST 2001 Apr 1 3:00
1204 -6:00 Canada C%sT
1205Zone America/Cambridge_Bay -7:00:20 - LMT 1884
1206 -7:00 NT_YK M%sT 1999 Oct 31 2:00
1207 -6:00 Canada C%sT 2000 Oct 29 2:00
1208 -5:00 - EST 2000 Nov 5 0:00
1209 -6:00 - CST 2001 Apr 1 3:00
1210 -7:00 Canada M%sT
1211Zone America/Yellowknife -7:37:24 - LMT 1884
1212 -7:00 NT_YK M%sT
1213Zone America/Inuvik -8:54:00 - LMT 1884
1214 -8:00 NT_YK P%sT 1979 Apr lastSun 2:00
1215 -7:00 NT_YK M%sT
1216Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20
1217 -9:00 NT_YK Y%sT 1966 Jul 1 2:00
1218 -8:00 NT_YK P%sT
1219Zone America/Dawson -9:17:40 - LMT 1900 Aug 20
1220 -9:00 NT_YK Y%sT 1973 Oct 28 0:00
1221 -8:00 NT_YK P%sT
1222
1223
1224###############################################################################
1225
1226# Mexico
1227
1228# From Paul Eggert (2001-03-05):
1229# The Investigation and Analysis Service of the
1230# Mexican Library of Congress (MLoC) has published a
1231# <a href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/">
1232# history of Mexican local time (in Spanish)
1233# </a>.
1234#
1235# Here are the discrepancies between Shanks and the MLoC.
1236# (In all cases we go with the MLoC.)
1237# Shanks reports that Baja was at -8:00 in 1922/1923.
1238# Shanks says the 1930 transition in Baja was 1930-11-16.
1239# Shanks reports no DST during summer 1931.
1240# Shanks reports a transition at 1032-03-30 23:00, not 1932-04-01.
1241# Shanks does not report transitions for Baja in 1945 or 1948.
1242# Shanks reports southern Mexico transitions on 1981-12-01, not 12-23.
1243# Shanks says Quintana Roo switched to -6:00 on 1982-12-02, and to -5:00
1244# on 1997-10-26 at 02:00.
1245
1246# From Gwillim Law (2001-02-20):
1247# There are some other discrepancies between the Decrees page and the
1248# tz database. I think they can best be explained by supposing that
1249# the researchers who prepared the Decrees page failed to find some of
1250# the relevant documents.
1251
1252# From Paul Eggert (2000-07-26):
1253# Shanks gives 1942-04-01 instead of 1942-04-24, and omits the 1981
1254# and 1988 DST experiments. Go with spin.com.mx.
1255
1256# From Alan Perry <alan.perry@eng.sun.com> (1996-02-15):
1257# A guy from our Mexico subsidiary finally found the Presidential Decree
1258# outlining the timezone changes in Mexico.
1259#
1260# ------------- Begin Forwarded Message -------------
1261#
1262# I finally got my hands on the Official Presidential Decree that sets up the
1263# rules for the DST changes. The rules are:
1264#
1265# 1. The country is divided in 3 timezones:
1266# - Baja California Norte (the Mexico/BajaNorte TZ)
1267# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ)
1268# - The rest of the country (the Mexico/General TZ)
1269#
1270# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October
1271# at 2:00 AM, the times in each zone are as follows:
1272# BajaNorte: GMT+7
1273# BajaSur: GMT+6
1274# General: GMT+5
1275#
1276# 3. The rest of the year, the times are as follows:
1277# BajaNorte: GMT+8
1278# BajaSur: GMT+7
1279# General: GMT+6
1280#
1281# The Decree was published in Mexico's Official Newspaper on January 4th.
1282#
1283# -------------- End Forwarded Message --------------
1284# From Paul Eggert (1996-06-12):
1285# For an English translation of the decree, see
1286# <a href="http://mexico-travel.com/extra/timezone_eng.html">
1287# ``Diario Oficial: Time Zone Changeover'' (1996-01-04).
1288# </a>
1289
1290# From Rives McDow (1998-10-08):
1291# The State of Quintana Roo has reverted back to central STD and DST times
1292# (i.e. UTC -0600 and -0500 as of 1998-08-02).
1293
1294# From Rives McDow (2000-01-10):
1295# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time
1296# zone 5 hours from the International Date Line, and will not observe daylight
1297# savings time so as to stay on the same time zone as the southern part of
1298# Arizona year round.
1299
1300# From Jesper Norgaard, translating
1301# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17):
1302# In Oaxaca, the 55.000 teachers from the Section 22 of the National
1303# Syndicate of Education Workers, refuse to apply daylight saving each
1304# year, so that the more than 10,000 schools work at normal hour the
1305# whole year.
1306
1307# From Gwillim Law (2001-01-19):
1308# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says
1309# (translated):...
1310# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced
1311# that Summer Time will be reduced from seven to five months, starting
1312# this year....
1313# <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001>
1314# [translated], says "summer time will ... take effect on the first Sunday
1315# in May, and end on the last Sunday of September.
1316
1317# From Arthur David Olson (2001-01-25):
1318# The 2001-01-24 traditional Washington Post contained the page one
1319# story "Timely Issue Divides Mexicans."...
1320# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html
1321# ... Mexico City Mayor Lopez Obrador "...is threatening to keep
1322# Mexico City and its 20 million residents on a different time than
1323# the rest of the country..." In particular, Lopez Obrador would abolish
1324# observation of Daylight Saving Time.
1325
1326# <a href="http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre">
1327# Official statute published by the Energy Department
1328# </a> (2001-02-01) shows Baja and Chihauhua as still using US DST rules,
1329# and Sonora with no DST. This was reported by Jesper Norgaard (2001-02-03).
1330
1331# From Paul Eggert (2001-03-03):
1332#
1333# <a href="http://www.latimes.com/news/nation/20010303/t000018766.html">
1334# James F. Smith writes in today's LA Times
1335# </a>
1336# * Sonora will continue to observe standard time.
1337# * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that
1338# the Federal District will not adopt DST.
1339# * 4 of 16 district leaders announced they'll ignore the decree.
1340# * The decree does not affect federal-controlled facilities including
1341# the airport, banks, hospitals, and schools.
1342#
1343# For now we'll assume that the Federal District will bow to federal rules.
1344
1345# From Jesper Norgaard (2001-04-01):
1346# I found some references to the Mexican application of daylight
1347# saving, which modifies what I had already sent you, stating earlier
1348# that a number of northern Mexican states would go on daylight
1349# saving. The modification reverts this to only cover Baja California
1350# (Norte), while all other states (except Sonora, who has no daylight
1351# saving all year) will follow the original decree of president
1352# Vicente Fox, starting daylight saving May 6, 2001 and ending
1353# September 30, 2001.
1354# References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp>
1355# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31)
1356
|
| 1357# From Reuters (2001-09-04):
1358# Mexico's Supreme Court on Tuesday declared that daylight savings was
1359# unconstitutional in Mexico City, creating the possibility the
1360# capital will be in a different time zone from the rest of the nation
1361# next year.... The Supreme Court's ruling takes effect at 2:00
1362# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to
1363# standard time. "This is so residents of the Federal District are not
1364# subject to unexpected time changes," a statement from the court said.
1365
|
1338# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1339Rule Mexico 1939 only - Feb 5 0:00 1:00 D
1340Rule Mexico 1939 only - Jun 25 0:00 0 S
1341Rule Mexico 1940 only - Dec 9 0:00 1:00 D
1342Rule Mexico 1941 only - Apr 1 0:00 0 S
1343Rule Mexico 1943 only - Dec 16 0:00 1:00 W
1344Rule Mexico 1944 only - May 1 0:00 0 S
1345Rule Mexico 1950 only - Feb 12 0:00 1:00 D
1346Rule Mexico 1950 only - Jul 30 0:00 0 S
1347Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D
1348Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S
1349Rule Mexico 2001 max - May Sun>=1 2:00 1:00 D
1350Rule Mexico 2001 max - Sep lastSun 2:00 0 S
1351# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1352# Quintana Roo
1353Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56
1354 -6:00 - CST 1981 Dec 23
1355 -5:00 Mexico E%sT 1998 Aug 2 2:00
1356 -6:00 Mexico C%sT
1357# Campeche, Yucatan
1358Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32
1359 -6:00 - CST 1981 Dec 23
1360 -5:00 - EST 1982 Dec 2
1361 -6:00 Mexico C%sT
1362# Coahuila, Durango, Nuevo Leon, Tamaulipas
1363Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44
1364 -6:00 - CST 1988
1365 -6:00 US C%sT 1989
1366 -6:00 Mexico C%sT
1367# Central Mexico
1368Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24
1369 -7:00 - MST 1927 Jun 10 23:00
1370 -6:00 - CST 1930 Nov 15
1371 -7:00 - MST 1931 May 1 23:00
1372 -6:00 - CST 1931 Oct
1373 -7:00 - MST 1932 Apr 1
| 1366# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1367Rule Mexico 1939 only - Feb 5 0:00 1:00 D
1368Rule Mexico 1939 only - Jun 25 0:00 0 S
1369Rule Mexico 1940 only - Dec 9 0:00 1:00 D
1370Rule Mexico 1941 only - Apr 1 0:00 0 S
1371Rule Mexico 1943 only - Dec 16 0:00 1:00 W
1372Rule Mexico 1944 only - May 1 0:00 0 S
1373Rule Mexico 1950 only - Feb 12 0:00 1:00 D
1374Rule Mexico 1950 only - Jul 30 0:00 0 S
1375Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D
1376Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S
1377Rule Mexico 2001 max - May Sun>=1 2:00 1:00 D
1378Rule Mexico 2001 max - Sep lastSun 2:00 0 S
1379# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1380# Quintana Roo
1381Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56
1382 -6:00 - CST 1981 Dec 23
1383 -5:00 Mexico E%sT 1998 Aug 2 2:00
1384 -6:00 Mexico C%sT
1385# Campeche, Yucatan
1386Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32
1387 -6:00 - CST 1981 Dec 23
1388 -5:00 - EST 1982 Dec 2
1389 -6:00 Mexico C%sT
1390# Coahuila, Durango, Nuevo Leon, Tamaulipas
1391Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44
1392 -6:00 - CST 1988
1393 -6:00 US C%sT 1989
1394 -6:00 Mexico C%sT
1395# Central Mexico
1396Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24
1397 -7:00 - MST 1927 Jun 10 23:00
1398 -6:00 - CST 1930 Nov 15
1399 -7:00 - MST 1931 May 1 23:00
1400 -6:00 - CST 1931 Oct
1401 -7:00 - MST 1932 Apr 1
|
1374 -6:00 Mexico C%sT
| 1402 -6:00 Mexico C%sT 2001 Sep 30 02:00
1403 -6:00 - CST
|
1375# Chihuahua
1376Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40
1377 -7:00 - MST 1927 Jun 10 23:00
1378 -6:00 - CST 1930 Nov 15
1379 -7:00 - MST 1931 May 1 23:00
1380 -6:00 - CST 1931 Oct
1381 -7:00 - MST 1932 Apr 1
1382 -6:00 - CST 1996
1383 -6:00 Mexico C%sT 1998
1384 -6:00 - CST 1998 Apr Sun>=1 3:00
1385 -7:00 Mexico M%sT
1386# Sonora
1387Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08
1388 -7:00 - MST 1927 Jun 10 23:00
1389 -6:00 - CST 1930 Nov 15
1390 -7:00 - MST 1931 May 1 23:00
1391 -6:00 - CST 1931 Oct
1392 -7:00 - MST 1932 Apr 1
1393 -6:00 - CST 1942 Apr 24
1394 -7:00 - MST 1949 Jan 14
1395 -8:00 - PST 1970
1396 -7:00 Mexico M%sT 1999
1397 -7:00 - MST
1398# Baja California Sur, Nayarit, Sinaloa
1399Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20
1400 -7:00 - MST 1927 Jun 10 23:00
1401 -6:00 - CST 1930 Nov 15
1402 -7:00 - MST 1931 May 1 23:00
1403 -6:00 - CST 1931 Oct
1404 -7:00 - MST 1932 Apr 1
1405 -6:00 - CST 1942 Apr 24
1406 -7:00 - MST 1949 Jan 14
1407 -8:00 - PST 1970
1408 -7:00 Mexico M%sT
1409# Baja California
1410Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56
1411 -7:00 - MST 1924
1412 -8:00 - PST 1927 Jun 10 23:00
1413 -7:00 - MST 1930 Nov 15
1414 -8:00 - PST 1931 Apr 1
1415 -8:00 1:00 PDT 1931 Sep 30
1416 -8:00 - PST 1942 Apr 24
1417 -8:00 1:00 PWT 1945 Nov 12
1418 -8:00 - PST 1948 Apr 5
1419 -8:00 1:00 PDT 1949 Jan 14
1420 -8:00 - PST 1954
1421 -8:00 CA P%sT 1961
1422 -8:00 - PST 1976
1423 -8:00 US P%sT 1996
1424 -8:00 Mexico P%sT 2001
1425 -8:00 US P%sT
1426# From Paul Eggert (2001-03-05):
1427# Formerly there was an America/Ensenada zone, which differed from
1428# America/Tijuana only in that it did not observe DST from 1976
1429# through 1995. This was as per Shanks. However, Guy Harris reports
1430# that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and
1431# Tijuana observe DST," which contradicts Shanks but does imply that
1432# DST-observance was a town-by-town matter back then. This concerns
1433# data after 1970 so most likely there should be at least one Zone
1434# other than America/Tijuana for Baja, but it's not clear yet what its
1435# name or contents should be.
1436#
1437# Revillagigedo Is
1438# no information
1439
1440###############################################################################
1441
1442# Anguilla
1443# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1444Zone America/Anguilla -4:12:16 - LMT 1912 Mar 2
1445 -4:00 - AST
1446
1447# Antigua and Barbuda
1448# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1449Zone America/Antigua -4:07:12 - LMT 1912 Mar 2
1450 -5:00 - EST 1951
1451 -4:00 - AST
1452
1453# Bahamas
1454# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1455Rule Bahamas 1964 max - Oct lastSun 2:00 0 S
1456Rule Bahamas 1964 1986 - Apr lastSun 2:00 1:00 D
1457Rule Bahamas 1987 max - Apr Sun>=1 2:00 1:00 D
1458# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1459Zone America/Nassau -5:09:24 - LMT 1912 Mar 2
1460 -5:00 Bahamas E%sT
1461
1462# Barbados
1463# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1464Rule Barb 1977 only - Jun 12 2:00 1:00 D
1465Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S
1466Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D
1467Rule Barb 1979 only - Sep 30 2:00 0 S
1468Rule Barb 1980 only - Sep 25 2:00 0 S
1469# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1470Zone America/Barbados -3:58:28 - LMT 1924 # Bridgetown
1471 -3:58:28 - BMT 1932 # Bridgetown Mean Time
1472 -4:00 Barb A%sT
1473
1474# Belize
1475# Whitman entirely disagrees with Shanks; go with Shanks.
1476# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1477Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD
1478Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S
1479Rule Belize 1973 only - Dec 5 0:00 1:00 D
1480Rule Belize 1974 only - Feb 9 0:00 0 S
1481Rule Belize 1982 only - Dec 18 0:00 1:00 D
1482Rule Belize 1983 only - Feb 12 0:00 0 S
1483# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1484Zone America/Belize -5:52:48 - LMT 1912 Apr
1485 -6:00 Belize C%sT
1486
1487# Bermuda
1488# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1489Zone Atlantic/Bermuda -4:19:04 - LMT 1930 Jan 1 2:00 # Hamilton
1490 -4:00 - AST 1974 Apr 28 2:00
1491 -4:00 Bahamas A%sT
1492
1493# Cayman Is
1494# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1495Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown
1496 -5:07:12 - KMT 1912 Feb # Kingston Mean Time
1497 -5:00 - EST
1498
1499# Costa Rica
1500# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1501Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D
1502Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S
1503Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D
1504# IATA SSIM (1991-09) says the following was at 1:00; go with Shanks.
1505Rule CR 1991 only - Jul 1 0:00 0 S
1506Rule CR 1992 only - Mar 15 0:00 0 S
1507# There are too many San Joses elsewhere, so we'll use `Costa Rica'.
1508# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1509Zone America/Costa_Rica -5:36:20 - LMT 1890 # San Jose
1510 -5:36:20 - SJMT 1921 Jan 15 # San Jose Mean Time
1511 -6:00 CR C%sT
1512# Coco
1513# no information; probably like America/Costa_Rica
1514
1515# Cuba
1516
1517# From Arthur David Olson (1999-03-29):
1518# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between
1519# the Cuban National Team and the Baltimore Orioles was carried live on
1520# the Orioles Radio Network, including affiliate WTOP in Washington, DC.
1521# During the game, play-by-play announcer Jim Hunter noted that
1522# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving
1523# Time today." (The "two hour" remark referred to losing one hour of
1524# sleep on 1999-03-28--when the announcers were in Cuba as it switched
1525# to DST--and one more hour on 1999-04-04--when the announcers will have
1526# returned to Baltimore, which switches on that date.)
1527
1528# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1529Rule Cuba 1928 only - Jun 10 0:00 1:00 D
1530Rule Cuba 1928 only - Oct 10 0:00 0 S
1531Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D
1532Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S
1533Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D
1534Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S
1535Rule Cuba 1965 only - Jun 1 0:00 1:00 D
1536Rule Cuba 1965 only - Sep 30 0:00 0 S
1537Rule Cuba 1966 only - May 29 0:00 1:00 D
1538Rule Cuba 1966 only - Oct 2 0:00 0 S
1539Rule Cuba 1967 only - Apr 8 0:00 1:00 D
1540Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S
1541Rule Cuba 1968 only - Apr 14 0:00 1:00 D
1542Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D
1543Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S
1544Rule Cuba 1972 1974 - Oct 8 0:00 0 S
1545Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S
1546Rule Cuba 1978 only - May 7 0:00 1:00 D
1547Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S
1548Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D
1549Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D
1550Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D
1551Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D
1552Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S
1553Rule Cuba 1996 only - Oct 6 0:00s 0 S
1554Rule Cuba 1997 only - Oct 12 0:00s 0 S
1555Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D
1556Rule Cuba 1998 max - Oct lastSun 0:00s 0 S
1557Rule Cuba 2000 max - Apr Sun>=1 0:00s 1:00 D
1558
1559# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1560Zone America/Havana -5:29:28 - LMT 1890
1561 -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT
1562 -5:00 Cuba C%sT
1563
1564# Dominica
1565# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1566Zone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau
1567 -4:00 - AST
1568
1569# Dominican Republic
1570
1571# From Steffen Thorsen (2000-10-30):
1572# Enrique Morales reported to me that the Dominican Republic has changed the
1573# time zone to Eastern Standard Time as of Sunday 29 at 2 am....
1574# http://www.listin.com.do/antes/261000/republica/princi.html
1575
1576# From Paul Eggert (2000-12-04):
1577# That URL (2000-10-26, in Spanish) says they planned to use US-style DST.
1578
1579# From Rives McDow (2000-12-01):
1580# Dominican Republic changed its mind and presidential decree on Tuesday,
1581# November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the
1582# Dominican Republic will be reverting to 8 hours from the International Date
1583# Line, and will not be using DST in the foreseeable future. The reason they
1584# decided to use DST was to be in synch with Puerto Rico, who was also going
1585# to implement DST. When Puerto Rico didn't implement DST, the president
1586# decided to revert.
1587
1588
1589# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1590Rule DR 1966 only - Oct 30 0:00 1:00 D
1591Rule DR 1967 only - Feb 28 0:00 0 S
1592Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD
1593Rule DR 1970 only - Feb 21 0:00 0 S
1594Rule DR 1971 only - Jan 20 0:00 0 S
1595Rule DR 1972 1974 - Jan 21 0:00 0 S
1596# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1597Zone America/Santo_Domingo -4:39:36 - LMT 1890
1598 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT
1599 -5:00 DR E%sT 1974 Oct 27
1600 -4:00 - AST 2000 Oct 29 02:00
1601 -5:00 US E%sT 2000 Dec 3 01:00
1602 -4:00 - AST
1603
1604# El Salvador
1605# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1606Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D
1607Rule Salv 1987 1988 - Sep lastSun 0:00 0 S
1608# There are too many San Salvadors elsewhere, so we'll use `El Salvador'.
1609# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1610Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador
1611 -6:00 Salv C%sT
1612
1613# Grenada
1614# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1615Zone America/Grenada -4:07:00 - LMT 1911 Jul # St George's
1616 -4:00 - AST
1617
1618# Guadeloupe
1619# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1620Zone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe a Pitre
1621 -4:00 - AST
1622
1623# Guatemala
1624# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1625Rule Guat 1973 only - Nov 25 0:00 1:00 D
1626Rule Guat 1974 only - Feb 24 0:00 0 S
1627Rule Guat 1983 only - May 21 0:00 1:00 D
1628Rule Guat 1983 only - Sep 22 0:00 0 S
1629Rule Guat 1991 only - Mar 23 0:00 1:00 D
1630Rule Guat 1991 only - Sep 7 0:00 0 S
1631# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1632Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5
1633 -6:00 Guat C%sT
1634
1635# Haiti
1636# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1637Rule Haiti 1983 only - May 8 0:00 1:00 D
1638Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D
1639Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S
1640# Shanks says AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. Go with IATA.
1641Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D
1642Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S
1643# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1644Zone America/Port-au-Prince -4:49:20 - LMT 1890
1645 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT
1646 -5:00 Haiti E%sT
1647
1648# Honduras
1649# Shanks says 1921 Jan 1; go with Whitman's more precise Apr 1.
1650# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1651Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr
1652 -6:00 Salv C%sT
1653#
1654# Great Swan I ceded by US to Honduras in 1972
1655
1656# Jamaica
1657
1658# From Bob Devine (1988-01-28):
1659# Follows US rules.
1660
1661# From U. S. Naval Observatory (1989-01-19):
1662# JAMAICA 5 H BEHIND UTC
1663
1664# From Shanks:
1665# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1666Zone America/Jamaica -5:07:12 - LMT 1890 # Kingston
1667 -5:07:12 - KMT 1912 Feb # Kingston Mean Time
1668 -5:00 - EST 1974 Apr 28 2:00
1669 -5:00 US E%sT 1984
1670 -5:00 - EST
1671
1672# Martinique
1673# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1674Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France
| 1404# Chihuahua
1405Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40
1406 -7:00 - MST 1927 Jun 10 23:00
1407 -6:00 - CST 1930 Nov 15
1408 -7:00 - MST 1931 May 1 23:00
1409 -6:00 - CST 1931 Oct
1410 -7:00 - MST 1932 Apr 1
1411 -6:00 - CST 1996
1412 -6:00 Mexico C%sT 1998
1413 -6:00 - CST 1998 Apr Sun>=1 3:00
1414 -7:00 Mexico M%sT
1415# Sonora
1416Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08
1417 -7:00 - MST 1927 Jun 10 23:00
1418 -6:00 - CST 1930 Nov 15
1419 -7:00 - MST 1931 May 1 23:00
1420 -6:00 - CST 1931 Oct
1421 -7:00 - MST 1932 Apr 1
1422 -6:00 - CST 1942 Apr 24
1423 -7:00 - MST 1949 Jan 14
1424 -8:00 - PST 1970
1425 -7:00 Mexico M%sT 1999
1426 -7:00 - MST
1427# Baja California Sur, Nayarit, Sinaloa
1428Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20
1429 -7:00 - MST 1927 Jun 10 23:00
1430 -6:00 - CST 1930 Nov 15
1431 -7:00 - MST 1931 May 1 23:00
1432 -6:00 - CST 1931 Oct
1433 -7:00 - MST 1932 Apr 1
1434 -6:00 - CST 1942 Apr 24
1435 -7:00 - MST 1949 Jan 14
1436 -8:00 - PST 1970
1437 -7:00 Mexico M%sT
1438# Baja California
1439Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56
1440 -7:00 - MST 1924
1441 -8:00 - PST 1927 Jun 10 23:00
1442 -7:00 - MST 1930 Nov 15
1443 -8:00 - PST 1931 Apr 1
1444 -8:00 1:00 PDT 1931 Sep 30
1445 -8:00 - PST 1942 Apr 24
1446 -8:00 1:00 PWT 1945 Nov 12
1447 -8:00 - PST 1948 Apr 5
1448 -8:00 1:00 PDT 1949 Jan 14
1449 -8:00 - PST 1954
1450 -8:00 CA P%sT 1961
1451 -8:00 - PST 1976
1452 -8:00 US P%sT 1996
1453 -8:00 Mexico P%sT 2001
1454 -8:00 US P%sT
1455# From Paul Eggert (2001-03-05):
1456# Formerly there was an America/Ensenada zone, which differed from
1457# America/Tijuana only in that it did not observe DST from 1976
1458# through 1995. This was as per Shanks. However, Guy Harris reports
1459# that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and
1460# Tijuana observe DST," which contradicts Shanks but does imply that
1461# DST-observance was a town-by-town matter back then. This concerns
1462# data after 1970 so most likely there should be at least one Zone
1463# other than America/Tijuana for Baja, but it's not clear yet what its
1464# name or contents should be.
1465#
1466# Revillagigedo Is
1467# no information
1468
1469###############################################################################
1470
1471# Anguilla
1472# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1473Zone America/Anguilla -4:12:16 - LMT 1912 Mar 2
1474 -4:00 - AST
1475
1476# Antigua and Barbuda
1477# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1478Zone America/Antigua -4:07:12 - LMT 1912 Mar 2
1479 -5:00 - EST 1951
1480 -4:00 - AST
1481
1482# Bahamas
1483# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1484Rule Bahamas 1964 max - Oct lastSun 2:00 0 S
1485Rule Bahamas 1964 1986 - Apr lastSun 2:00 1:00 D
1486Rule Bahamas 1987 max - Apr Sun>=1 2:00 1:00 D
1487# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1488Zone America/Nassau -5:09:24 - LMT 1912 Mar 2
1489 -5:00 Bahamas E%sT
1490
1491# Barbados
1492# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1493Rule Barb 1977 only - Jun 12 2:00 1:00 D
1494Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S
1495Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D
1496Rule Barb 1979 only - Sep 30 2:00 0 S
1497Rule Barb 1980 only - Sep 25 2:00 0 S
1498# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1499Zone America/Barbados -3:58:28 - LMT 1924 # Bridgetown
1500 -3:58:28 - BMT 1932 # Bridgetown Mean Time
1501 -4:00 Barb A%sT
1502
1503# Belize
1504# Whitman entirely disagrees with Shanks; go with Shanks.
1505# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1506Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD
1507Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S
1508Rule Belize 1973 only - Dec 5 0:00 1:00 D
1509Rule Belize 1974 only - Feb 9 0:00 0 S
1510Rule Belize 1982 only - Dec 18 0:00 1:00 D
1511Rule Belize 1983 only - Feb 12 0:00 0 S
1512# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1513Zone America/Belize -5:52:48 - LMT 1912 Apr
1514 -6:00 Belize C%sT
1515
1516# Bermuda
1517# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1518Zone Atlantic/Bermuda -4:19:04 - LMT 1930 Jan 1 2:00 # Hamilton
1519 -4:00 - AST 1974 Apr 28 2:00
1520 -4:00 Bahamas A%sT
1521
1522# Cayman Is
1523# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1524Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown
1525 -5:07:12 - KMT 1912 Feb # Kingston Mean Time
1526 -5:00 - EST
1527
1528# Costa Rica
1529# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1530Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D
1531Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S
1532Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D
1533# IATA SSIM (1991-09) says the following was at 1:00; go with Shanks.
1534Rule CR 1991 only - Jul 1 0:00 0 S
1535Rule CR 1992 only - Mar 15 0:00 0 S
1536# There are too many San Joses elsewhere, so we'll use `Costa Rica'.
1537# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1538Zone America/Costa_Rica -5:36:20 - LMT 1890 # San Jose
1539 -5:36:20 - SJMT 1921 Jan 15 # San Jose Mean Time
1540 -6:00 CR C%sT
1541# Coco
1542# no information; probably like America/Costa_Rica
1543
1544# Cuba
1545
1546# From Arthur David Olson (1999-03-29):
1547# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between
1548# the Cuban National Team and the Baltimore Orioles was carried live on
1549# the Orioles Radio Network, including affiliate WTOP in Washington, DC.
1550# During the game, play-by-play announcer Jim Hunter noted that
1551# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving
1552# Time today." (The "two hour" remark referred to losing one hour of
1553# sleep on 1999-03-28--when the announcers were in Cuba as it switched
1554# to DST--and one more hour on 1999-04-04--when the announcers will have
1555# returned to Baltimore, which switches on that date.)
1556
1557# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1558Rule Cuba 1928 only - Jun 10 0:00 1:00 D
1559Rule Cuba 1928 only - Oct 10 0:00 0 S
1560Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D
1561Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S
1562Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D
1563Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S
1564Rule Cuba 1965 only - Jun 1 0:00 1:00 D
1565Rule Cuba 1965 only - Sep 30 0:00 0 S
1566Rule Cuba 1966 only - May 29 0:00 1:00 D
1567Rule Cuba 1966 only - Oct 2 0:00 0 S
1568Rule Cuba 1967 only - Apr 8 0:00 1:00 D
1569Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S
1570Rule Cuba 1968 only - Apr 14 0:00 1:00 D
1571Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D
1572Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S
1573Rule Cuba 1972 1974 - Oct 8 0:00 0 S
1574Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S
1575Rule Cuba 1978 only - May 7 0:00 1:00 D
1576Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S
1577Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D
1578Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D
1579Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D
1580Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D
1581Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S
1582Rule Cuba 1996 only - Oct 6 0:00s 0 S
1583Rule Cuba 1997 only - Oct 12 0:00s 0 S
1584Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D
1585Rule Cuba 1998 max - Oct lastSun 0:00s 0 S
1586Rule Cuba 2000 max - Apr Sun>=1 0:00s 1:00 D
1587
1588# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1589Zone America/Havana -5:29:28 - LMT 1890
1590 -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT
1591 -5:00 Cuba C%sT
1592
1593# Dominica
1594# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1595Zone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau
1596 -4:00 - AST
1597
1598# Dominican Republic
1599
1600# From Steffen Thorsen (2000-10-30):
1601# Enrique Morales reported to me that the Dominican Republic has changed the
1602# time zone to Eastern Standard Time as of Sunday 29 at 2 am....
1603# http://www.listin.com.do/antes/261000/republica/princi.html
1604
1605# From Paul Eggert (2000-12-04):
1606# That URL (2000-10-26, in Spanish) says they planned to use US-style DST.
1607
1608# From Rives McDow (2000-12-01):
1609# Dominican Republic changed its mind and presidential decree on Tuesday,
1610# November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the
1611# Dominican Republic will be reverting to 8 hours from the International Date
1612# Line, and will not be using DST in the foreseeable future. The reason they
1613# decided to use DST was to be in synch with Puerto Rico, who was also going
1614# to implement DST. When Puerto Rico didn't implement DST, the president
1615# decided to revert.
1616
1617
1618# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1619Rule DR 1966 only - Oct 30 0:00 1:00 D
1620Rule DR 1967 only - Feb 28 0:00 0 S
1621Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD
1622Rule DR 1970 only - Feb 21 0:00 0 S
1623Rule DR 1971 only - Jan 20 0:00 0 S
1624Rule DR 1972 1974 - Jan 21 0:00 0 S
1625# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1626Zone America/Santo_Domingo -4:39:36 - LMT 1890
1627 -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT
1628 -5:00 DR E%sT 1974 Oct 27
1629 -4:00 - AST 2000 Oct 29 02:00
1630 -5:00 US E%sT 2000 Dec 3 01:00
1631 -4:00 - AST
1632
1633# El Salvador
1634# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1635Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D
1636Rule Salv 1987 1988 - Sep lastSun 0:00 0 S
1637# There are too many San Salvadors elsewhere, so we'll use `El Salvador'.
1638# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1639Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador
1640 -6:00 Salv C%sT
1641
1642# Grenada
1643# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1644Zone America/Grenada -4:07:00 - LMT 1911 Jul # St George's
1645 -4:00 - AST
1646
1647# Guadeloupe
1648# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1649Zone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe a Pitre
1650 -4:00 - AST
1651
1652# Guatemala
1653# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1654Rule Guat 1973 only - Nov 25 0:00 1:00 D
1655Rule Guat 1974 only - Feb 24 0:00 0 S
1656Rule Guat 1983 only - May 21 0:00 1:00 D
1657Rule Guat 1983 only - Sep 22 0:00 0 S
1658Rule Guat 1991 only - Mar 23 0:00 1:00 D
1659Rule Guat 1991 only - Sep 7 0:00 0 S
1660# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1661Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5
1662 -6:00 Guat C%sT
1663
1664# Haiti
1665# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1666Rule Haiti 1983 only - May 8 0:00 1:00 D
1667Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D
1668Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S
1669# Shanks says AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. Go with IATA.
1670Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D
1671Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S
1672# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1673Zone America/Port-au-Prince -4:49:20 - LMT 1890
1674 -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT
1675 -5:00 Haiti E%sT
1676
1677# Honduras
1678# Shanks says 1921 Jan 1; go with Whitman's more precise Apr 1.
1679# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1680Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr
1681 -6:00 Salv C%sT
1682#
1683# Great Swan I ceded by US to Honduras in 1972
1684
1685# Jamaica
1686
1687# From Bob Devine (1988-01-28):
1688# Follows US rules.
1689
1690# From U. S. Naval Observatory (1989-01-19):
1691# JAMAICA 5 H BEHIND UTC
1692
1693# From Shanks:
1694# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1695Zone America/Jamaica -5:07:12 - LMT 1890 # Kingston
1696 -5:07:12 - KMT 1912 Feb # Kingston Mean Time
1697 -5:00 - EST 1974 Apr 28 2:00
1698 -5:00 US E%sT 1984
1699 -5:00 - EST
1700
1701# Martinique
1702# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1703Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France
|
1675 -4:04 - FFMT 1911 May # Fort-de-France MT
| 1704 -4:04:20 - FFMT 1911 May # Fort-de-France MT
|
1676 -4:00 - AST 1980 Apr 6
1677 -4:00 1:00 ADT 1980 Sep 28
1678 -4:00 - AST
1679
1680# Montserrat
1681# From Paul Eggert (1997-08-31):
1682# Recent volcanic eruptions have forced evacuation of Plymouth, the capital.
1683# Luckily, Olveston, the current de facto capital, has the same longitude.
1684# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1685Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Olveston
1686 -4:00 - AST
1687
1688# Nicaragua
1689#
1690# From Steffen Thorsen (1998-12-29):
1691# Nicaragua seems to be back at -6:00 but I have not been able to find when
1692# they changed from -5:00.
1693#
1694# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1695Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D
1696Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S
1697Rule Nic 1992 only - Jan 1 4:00 1:00 D
1698Rule Nic 1992 only - Sep 24 0:00 0 S
1699# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1700Zone America/Managua -5:45:08 - LMT 1890
| 1705 -4:00 - AST 1980 Apr 6
1706 -4:00 1:00 ADT 1980 Sep 28
1707 -4:00 - AST
1708
1709# Montserrat
1710# From Paul Eggert (1997-08-31):
1711# Recent volcanic eruptions have forced evacuation of Plymouth, the capital.
1712# Luckily, Olveston, the current de facto capital, has the same longitude.
1713# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1714Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Olveston
1715 -4:00 - AST
1716
1717# Nicaragua
1718#
1719# From Steffen Thorsen (1998-12-29):
1720# Nicaragua seems to be back at -6:00 but I have not been able to find when
1721# they changed from -5:00.
1722#
1723# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1724Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D
1725Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S
1726Rule Nic 1992 only - Jan 1 4:00 1:00 D
1727Rule Nic 1992 only - Sep 24 0:00 0 S
1728# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1729Zone America/Managua -5:45:08 - LMT 1890
|
1701 -5:45 - MMT 1934 Jun 23 # Managua Mean Time
| 1730 -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time?
|
1702 -6:00 - CST 1973 May
1703 -5:00 - EST 1975 Feb 16
1704 -6:00 Nic C%sT 1993 Jan 1 4:00
1705 -5:00 - EST 1998 Dec
1706 -6:00 - CST
1707
1708# Panama
1709# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1710Zone America/Panama -5:18:08 - LMT 1890
| 1731 -6:00 - CST 1973 May
1732 -5:00 - EST 1975 Feb 16
1733 -6:00 Nic C%sT 1993 Jan 1 4:00
1734 -5:00 - EST 1998 Dec
1735 -6:00 - CST
1736
1737# Panama
1738# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1739Zone America/Panama -5:18:08 - LMT 1890
|
1711 -5:20 - PMT 1908 Apr 22 # Panama Mean Time
| 1740 -5:19:36 - CMT 1908 Apr 22 # Colon Mean Time
|
1712 -5:00 - EST
1713
1714# Puerto Rico
1715# There are too many San Juans elsewhere, so we'll use `Puerto_Rico'.
1716# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1717Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan
1718 -4:00 - AST 1942 May 3
1719 -4:00 1:00 AWT 1945 Sep 30 2:00
1720 -4:00 - AST
1721
1722# St Kitts-Nevis
1723# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1724Zone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre
1725 -4:00 - AST
1726
1727# St Lucia
1728# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1729Zone America/St_Lucia -4:04:00 - LMT 1890 # Castries
| 1741 -5:00 - EST
1742
1743# Puerto Rico
1744# There are too many San Juans elsewhere, so we'll use `Puerto_Rico'.
1745# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1746Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan
1747 -4:00 - AST 1942 May 3
1748 -4:00 1:00 AWT 1945 Sep 30 2:00
1749 -4:00 - AST
1750
1751# St Kitts-Nevis
1752# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1753Zone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre
1754 -4:00 - AST
1755
1756# St Lucia
1757# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1758Zone America/St_Lucia -4:04:00 - LMT 1890 # Castries
|
1730 -4:04 - CMT 1912 # Castries Mean Time
| 1759 -4:04:00 - CMT 1912 # Castries Mean Time
|
1731 -4:00 - AST
1732
1733# St Pierre and Miquelon
1734# There are too many St Pierres elsewhere, so we'll use `Miquelon'.
1735# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1736Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre
1737 -4:00 - AST 1980 May
1738 -3:00 Mont PM%sT # Pierre & Miquelon Time
1739
1740# St Vincent and the Grenadines
1741# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1742Zone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown
1743 -4:04:56 - KMT 1912 # Kingstown Mean Time
1744 -4:00 - AST
1745
1746# Turks and Caicos
1747# From Paul Eggert (1998-08-06):
1748# Shanks says they use US DST rules, but IATA SSIM (1991/1998)
1749# says they switch at midnight. Go with IATA SSIM.
1750# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1751Rule TC 1979 1986 - Apr lastSun 0:00 1:00 D
1752Rule TC 1979 max - Oct lastSun 0:00 0 S
1753Rule TC 1987 max - Apr Sun>=1 0:00 1:00 D
1754# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1755Zone America/Grand_Turk -4:44:32 - LMT 1890
1756 -5:07:12 - KMT 1912 Feb # Kingston Mean Time
1757 -5:00 TC E%sT
1758
1759# British Virgin Is
1760# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1761Zone America/Tortola -4:18:28 - LMT 1911 Jul # Road Town
1762 -4:00 - AST
1763
1764# Virgin Is
1765# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1766Zone America/St_Thomas -4:19:44 - LMT 1911 Jul # Charlotte Amalie
1767 -4:00 - AST
| 1760 -4:00 - AST
1761
1762# St Pierre and Miquelon
1763# There are too many St Pierres elsewhere, so we'll use `Miquelon'.
1764# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1765Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre
1766 -4:00 - AST 1980 May
1767 -3:00 Mont PM%sT # Pierre & Miquelon Time
1768
1769# St Vincent and the Grenadines
1770# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1771Zone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown
1772 -4:04:56 - KMT 1912 # Kingstown Mean Time
1773 -4:00 - AST
1774
1775# Turks and Caicos
1776# From Paul Eggert (1998-08-06):
1777# Shanks says they use US DST rules, but IATA SSIM (1991/1998)
1778# says they switch at midnight. Go with IATA SSIM.
1779# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1780Rule TC 1979 1986 - Apr lastSun 0:00 1:00 D
1781Rule TC 1979 max - Oct lastSun 0:00 0 S
1782Rule TC 1987 max - Apr Sun>=1 0:00 1:00 D
1783# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1784Zone America/Grand_Turk -4:44:32 - LMT 1890
1785 -5:07:12 - KMT 1912 Feb # Kingston Mean Time
1786 -5:00 TC E%sT
1787
1788# British Virgin Is
1789# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1790Zone America/Tortola -4:18:28 - LMT 1911 Jul # Road Town
1791 -4:00 - AST
1792
1793# Virgin Is
1794# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1795Zone America/St_Thomas -4:19:44 - LMT 1911 Jul # Charlotte Amalie
1796 -4:00 - AST
|