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Commit | Line | Data |
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2fc1e207 | 1 | # @(#)northamerica 7.69 |
1815bff5 A |
2 | # also includes Central America and the Caribbean |
3 | ||
4 | # This data is by no means authoritative; if you think you know better, | |
5 | # go ahead and edit the file (and please send any changes to | |
6 | # tz@elsie.nci.nih.gov for general use in the future). | |
7 | ||
b51d5b5f | 8 | # From Paul Eggert <eggert@twinsun.com> (1999-03-22): |
1815bff5 | 9 | # A reliable and entertaining source about time zones is |
b51d5b5f | 10 | # Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). |
1815bff5 A |
11 | |
12 | ############################################################################### | |
13 | ||
14 | # United States | |
15 | ||
b51d5b5f A |
16 | # From Paul Eggert (1999-03-31): |
17 | # Howse writes (pp 121-125) that time zones were invented by | |
18 | # Professor Charles Ferdinand Dowd (1825-1904), | |
19 | # Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). | |
20 | # His pamphlet ``A System of National Time for Railroads'' (1870) | |
21 | # was the result of his proposals at the Convention of Railroad Trunk Lines | |
22 | # in New York City (1869-10). His 1870 proposal was based on Washington, DC, | |
23 | # but in 1872-05 he moved the proposed origin to Greenwich. | |
24 | # His proposal was adopted by the railroads on 1883-11-18 at 12:00, | |
25 | # and the most of the country soon followed suit. | |
26 | ||
1815bff5 A |
27 | # From Paul Eggert <eggert@twinsun.com> (1995-12-19): |
28 | # A good source for time zone historical data in the US is | |
29 | # Thomas G. Shanks, The American Atlas (5th edition), | |
30 | # San Diego: ACS Publications, Inc. (1991). | |
31 | # Make sure you have the errata sheet; the book is somewhat useless without it. | |
32 | # It is the source for the US and Puerto Rico entries below. | |
33 | ||
b51d5b5f | 34 | # From Paul Eggert (2001-03-06): |
1815bff5 | 35 | # Daylight Saving Time was first suggested as a joke by Benjamin Franklin |
b51d5b5f A |
36 | # in his whimsical essay ``An Economical Project for Diminishing the Cost |
37 | # of Light'' published in the Journal de Paris (1784-04-26). | |
1815bff5 A |
38 | # Not everyone is happy with the results: |
39 | # | |
40 | # I don't really care how time is reckoned so long as there is some | |
41 | # agreement about it, but I object to being told that I am saving | |
42 | # daylight when my reason tells me that I am doing nothing of the kind. | |
43 | # I even object to the implication that I am wasting something | |
44 | # valuable if I stay in bed after the sun has risen. As an admirer | |
45 | # of moonlight I resent the bossy insistence of those who want to | |
46 | # reduce my time for enjoying it. At the back of the Daylight Saving | |
47 | # scheme I detect the bony, blue-fingered hand of Puritanism, eager | |
48 | # to push people into bed earlier, and get them up earlier, to make | |
49 | # them healthy, wealthy and wise in spite of themselves. | |
50 | # | |
51 | # -- Robertson Davies, The Diary of Samuel Marchbanks (1947), XIX, Sunday | |
b51d5b5f A |
52 | # |
53 | # For more about the first ten years of DST in the United States, see | |
54 | # Robert Garland's <a href="http://www.clpgh.org/exhibit/dst.html"> | |
55 | # Ten years of daylight saving from the Pittsburgh standpoint | |
56 | # (Carnegie Library of Pittsburgh, 1927)</a>. | |
57 | # | |
58 | # Shanks says that DST was called "War Time" in the US in 1918 and 1919. | |
59 | # However, DST was imposed by the Standard Time Act of 1918, which | |
60 | # was the first nationwide legal time standard, and apparently | |
61 | # time was just called "Standard Time" or "Daylight Saving Time". | |
1815bff5 A |
62 | |
63 | # From Arthur David Olson: | |
64 | # US Daylight Saving Time ended on the last Sunday of *October* in 1974. | |
65 | # See, for example, the front page of the Saturday, 1974-10-26 | |
66 | # and Sunday, 1974-10-27 editions of the Washington Post. | |
67 | ||
68 | # From Arthur David Olson: | |
69 | # Before the Uniform Time Act of 1966 took effect in 1967, observance of | |
70 | # Daylight Saving Time in the US was by local option, except during wartime. | |
71 | ||
b51d5b5f A |
72 | # From Arthur David Olson (2000-09-25): |
73 | # Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. | |
74 | # In the introduction, Oboler spoke of "Eastern Peace Time." | |
75 | # An AltaVista search turned up | |
76 | # <a href="http://rowayton.org/rhs/hstaug45.html">: | |
77 | # "When the time is announced over the radio now, it is 'Eastern Peace | |
78 | # Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." | |
79 | # </a> (August 1945) by way of confirmation. | |
80 | ||
81 | # From Joseph Gallant <notquite@hotmail.com>, citing | |
82 | # George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): | |
83 | # At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set | |
c3a08f59 | 84 | # to switch to London for Attlee's address, but the American people |
b51d5b5f A |
85 | # never got to hear his speech live. According to one press account, |
86 | # CBS' Bob Trout was first to announce the word of Japan's surrender, | |
87 | # but a few seconds later, NBC, ABC and Mutual also flashed the word | |
88 | # of surrender, all of whom interrupting the bells of Big Ben in | |
c3a08f59 A |
89 | # London which were to precede Mr. Attlee's speech. |
90 | ||
91 | # From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From | |
92 | # Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: | |
93 | # | |
94 | # ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. | |
95 | # Any announcement from Asia would reach St. John's New York newsroom on a | |
96 | # wire service teletype machine, which had prescribed signals for major news. | |
97 | # Associated Press, for example, would ring five bells before spewing out | |
98 | # typed copy of an important story, and 10 bells for news "of transcendental | |
99 | # importance." | |
100 | # | |
101 | # On Aug. 14, stalling while talking steadily into the NBC networks' open | |
102 | # microphone, St. John heard five bells and waited only to hear a sixth bell, | |
103 | # before announcing confidently: "Ladies and gentlemen, World War II is over. | |
104 | # The Japanese have agreed to our surrender terms." | |
105 | # | |
106 | # He had scored a 20-second scoop on other broadcasters. | |
b51d5b5f | 107 | |
1815bff5 | 108 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
b51d5b5f | 109 | Rule US 1918 1919 - Mar lastSun 2:00 1:00 D |
1815bff5 A |
110 | Rule US 1918 1919 - Oct lastSun 2:00 0 S |
111 | Rule US 1942 only - Feb 9 2:00 1:00 W # War | |
b51d5b5f | 112 | Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace |
1815bff5 A |
113 | Rule US 1945 only - Sep 30 2:00 0 S |
114 | Rule US 1967 max - Oct lastSun 2:00 0 S | |
115 | Rule US 1967 1973 - Apr lastSun 2:00 1:00 D | |
116 | Rule US 1974 only - Jan 6 2:00 1:00 D | |
117 | Rule US 1975 only - Feb 23 2:00 1:00 D | |
118 | Rule US 1976 1986 - Apr lastSun 2:00 1:00 D | |
119 | Rule US 1987 max - Apr Sun>=1 2:00 1:00 D | |
b51d5b5f A |
120 | # <a href="http://thomas.loc.gov/cgi-bin/bdquery/z?d106:h.r.00177:"> |
121 | # H.R.177 | |
122 | # </a> (introduced 1999-01-06) would change April to March in the above rule. | |
1815bff5 A |
123 | |
124 | # From Bob Devine (1988-01-28): | |
125 | # ...Alaska (and Hawaii) had the timezone names changed in 1967. | |
126 | # old new | |
127 | # Pacific Standard Time(PST) -same- | |
128 | # Yukon Standard Time(YST) -same- | |
129 | # Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) | |
130 | # Nome Standard Time (NT) Bering Standard Time (BST) | |
131 | # | |
132 | # ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. | |
133 | # The YST zone now covers nearly all of the state, AHST just part | |
134 | # of the Aleutian islands. No DST. | |
135 | ||
136 | # From Paul Eggert (1995-12-19): | |
137 | # The tables below use `NST', not `NT', for Nome Standard Time. | |
138 | # I invented `CAWT' for Central Alaska War Time. | |
139 | ||
140 | # From U. S. Naval Observatory (1989-01-19): | |
141 | # USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON | |
142 | # USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 | |
143 | # USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON | |
144 | # USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 | |
145 | # USA MOUNTAIN 7 H BEHIND UTC DENVER | |
146 | # USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 | |
147 | # USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO | |
148 | # USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 | |
149 | # USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) | |
150 | # USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) | |
151 | # USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W | |
152 | # USA - " - 9 H BEHIND UTC APR 3 - OCT 30 | |
153 | # USA HAWAII 10 H BEHIND UTC | |
154 | # USA BERING 11 H BEHIND UTC SAMOA, MIDWAY | |
155 | ||
156 | # From Arthur David Olson (1989-01-21): | |
157 | # The above dates are for 1988. | |
158 | # Note the "AKST" and "AKDT" abbreviations, the claim that there's | |
159 | # no DST in Samoa, and the claim that there is DST in Alaska and the | |
160 | # Aleutians. | |
161 | ||
162 | # From Arthur David Olson (1988-02-13): | |
163 | # Legal standard time zone names, from United States Code (1982 Edition and | |
164 | # Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names | |
165 | # up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 | |
166 | # took effect), as explained in sections 263 and 261: | |
167 | # (none) | |
168 | # United States standard eastern time | |
169 | # United States standard mountain time | |
170 | # United States standard central time | |
171 | # United States standard Pacific time | |
172 | # (none) | |
173 | # United States standard Alaska time | |
174 | # (none) | |
175 | # Next, names from 1967-04-01 until 1983-11-30 (the date for | |
176 | # public law 98-181): | |
177 | # Atlantic standard time | |
178 | # eastern standard time | |
179 | # central standard time | |
180 | # mountain standard time | |
181 | # Pacific standard time | |
182 | # Yukon standard time | |
183 | # Alaska-Hawaii standard time | |
184 | # Bering standard time | |
185 | # And after 1983-11-30: | |
186 | # Atlantic standard time | |
187 | # eastern standard time | |
188 | # central standard time | |
189 | # mountain standard time | |
190 | # Pacific standard time | |
191 | # Alaska standard time | |
192 | # Hawaii-Aleutian standard time | |
193 | # Samoa standard time | |
194 | # The law doesn't give abbreviations. | |
195 | # | |
b51d5b5f A |
196 | # From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: |
197 | # Public law 106-564 (2000-12-23) introduced the abbreviation | |
198 | # "Chamorro Standard Time" for time in Guam and the Northern Marianas. | |
199 | # See the file "australasia". | |
200 | ||
b51d5b5f | 201 | |
c3a08f59 | 202 | # US eastern time, represented by New York |
b51d5b5f A |
203 | |
204 | # Connecticut, Delaware, District of Columbia, most of Florida, | |
c3a08f59 A |
205 | # Georgia, southeast Indiana (Clark, Dearborn, Floyd, Harrison, and |
206 | # Ohio counties), eastern Kentucky, Maine, Maryland, Massachusetts, | |
207 | # New Hampshire, New Jersey, New York, North Carolina, Ohio, | |
208 | # Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, | |
209 | # Vermont, Virginia, West Virginia | |
b51d5b5f | 210 | |
1815bff5 A |
211 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
212 | Rule NYC 1920 only - Mar lastSun 2:00 1:00 D | |
213 | Rule NYC 1920 only - Oct lastSun 2:00 0 S | |
214 | Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D | |
215 | Rule NYC 1921 1954 - Sep lastSun 2:00 0 S | |
216 | Rule NYC 1955 1966 - Oct lastSun 2:00 0 S | |
217 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
218 | Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:00 | |
219 | -5:00 US E%sT 1920 | |
220 | -5:00 NYC E%sT 1942 | |
221 | -5:00 US E%sT 1946 | |
222 | -5:00 NYC E%sT 1967 | |
223 | -5:00 US E%sT | |
224 | ||
c3a08f59 | 225 | # US central time, represented by Chicago |
b51d5b5f | 226 | |
2fc1e207 A |
227 | # Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, |
228 | # Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and | |
229 | # Washington counties), Illinois, western Indiana | |
c3a08f59 A |
230 | # (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, |
231 | # Vanderburgh, and Warrick counties), Iowa, most of Kansas, western | |
232 | # Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern | |
233 | # Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, | |
234 | # western Tennessee, most of Texas, Wisconsin | |
b51d5b5f | 235 | |
1815bff5 A |
236 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
237 | Rule Chicago 1920 only - Jun 13 2:00 1:00 D | |
238 | Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S | |
239 | Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D | |
240 | Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D | |
241 | Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S | |
242 | Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S | |
243 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
244 | Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:00 | |
245 | -6:00 US C%sT 1920 | |
246 | -6:00 Chicago C%sT 1936 Mar 1 2:00 | |
247 | -5:00 - EST 1936 Nov 15 2:00 | |
248 | -6:00 Chicago C%sT 1942 | |
249 | -6:00 US C%sT 1946 | |
250 | -6:00 Chicago C%sT 1967 | |
251 | -6:00 US C%sT | |
c3a08f59 A |
252 | # Oliver County, ND switched from mountain to central time on 1992-10-25. |
253 | Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:00 | |
254 | -7:00 US M%sT 1992 Oct 25 02:00 | |
255 | -6:00 US C%sT | |
1815bff5 | 256 | |
c3a08f59 | 257 | # US mountain time, represented by Denver |
b51d5b5f | 258 | # |
2fc1e207 | 259 | # Colorado, far western Kansas, Montana, western |
c3a08f59 A |
260 | # Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), |
261 | # New Mexico, southwestern North Dakota, far eastern Oregon, | |
b51d5b5f A |
262 | # western South Dakota, far western Texas (El Paso County, Hudspeth County, |
263 | # and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming | |
264 | # | |
1815bff5 A |
265 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
266 | Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D | |
267 | Rule Denver 1920 only - Oct lastSun 2:00 0 S | |
268 | Rule Denver 1921 only - May 22 2:00 0 S | |
269 | Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D | |
270 | Rule Denver 1965 1966 - Oct lastSun 2:00 0 S | |
271 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
272 | Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00 | |
273 | -7:00 US M%sT 1920 | |
274 | -7:00 Denver M%sT 1942 | |
275 | -7:00 US M%sT 1946 | |
276 | -7:00 Denver M%sT 1967 | |
277 | -7:00 US M%sT | |
278 | ||
279 | # US Pacific time, represented by Los Angeles | |
b51d5b5f | 280 | # |
2fc1e207 A |
281 | # California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, |
282 | # Idaho, Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties), | |
283 | # most of Nevada, most of Oregon, and Washington | |
b51d5b5f | 284 | # |
1815bff5 A |
285 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
286 | Rule CA 1948 only - Mar 14 2:00 1:00 D | |
287 | Rule CA 1949 only - Jan 1 2:00 0 S | |
288 | Rule CA 1950 1966 - Apr lastSun 2:00 1:00 D | |
289 | Rule CA 1950 1961 - Sep lastSun 2:00 0 S | |
290 | Rule CA 1962 1966 - Oct lastSun 2:00 0 S | |
291 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
292 | Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:00 | |
293 | -8:00 US P%sT 1946 | |
294 | -8:00 CA P%sT 1967 | |
295 | -8:00 US P%sT | |
296 | ||
297 | # Alaska | |
298 | # AK%sT is the modern abbreviation for -9:00 per USNO. | |
299 | # | |
c3a08f59 | 300 | # From Paul Eggert (2001-05-30): |
1815bff5 A |
301 | # Howse writes that Alaska switched from the Julian to the Gregorian calendar, |
302 | # and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. | |
b51d5b5f A |
303 | # This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, |
304 | # also a Friday. Include only the time zone part of this transition, | |
305 | # ignoring the switch from Julian to Gregorian, since we can't represent | |
306 | # the Julian calendar. | |
1815bff5 | 307 | # |
c3a08f59 A |
308 | # As far as we know, none of the exact locations mentioned below were |
309 | # permanently inhabited in 1867 by anyone using either calendar. | |
310 | # (Yakutat was colonized by the Russians in 1799, but the settlement | |
311 | # was destroyed in 1805 by a Yakutat-kon war party.) However, there | |
312 | # were nearby inhabitants in some cases and for our purposes perhaps | |
313 | # it's best to simply use the official transition. | |
314 | # | |
1815bff5 | 315 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
b51d5b5f A |
316 | Zone America/Juneau 15:02:19 - LMT 1867 Oct 18 |
317 | -8:57:41 - LMT 1900 Aug 20 12:00 | |
1815bff5 A |
318 | -8:00 - PST 1942 |
319 | -8:00 US P%sT 1946 | |
320 | -8:00 - PST 1969 | |
321 | -8:00 US P%sT 1983 Oct 30 2:00 | |
2fc1e207 | 322 | -9:00 US Y%sT 1983 Nov 30 |
1815bff5 | 323 | -9:00 US AK%sT |
b51d5b5f A |
324 | Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18 |
325 | -9:18:55 - LMT 1900 Aug 20 12:00 | |
1815bff5 A |
326 | -9:00 - YST 1942 |
327 | -9:00 US Y%sT 1946 | |
328 | -9:00 - YST 1969 | |
2fc1e207 | 329 | -9:00 US Y%sT 1983 Nov 30 |
1815bff5 | 330 | -9:00 US AK%sT |
b51d5b5f A |
331 | Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18 |
332 | -9:59:36 - LMT 1900 Aug 20 12:00 | |
1815bff5 A |
333 | -10:00 - CAT 1942 |
334 | -10:00 US CAT/CAWT 1946 | |
335 | -10:00 - CAT 1967 Apr | |
336 | -10:00 - AHST 1969 | |
337 | -10:00 US AH%sT 1983 Oct 30 2:00 | |
2fc1e207 | 338 | -9:00 US Y%sT 1983 Nov 30 |
1815bff5 | 339 | -9:00 US AK%sT |
b51d5b5f A |
340 | Zone America/Nome 12:58:21 - LMT 1867 Oct 18 |
341 | -11:01:38 - LMT 1900 Aug 20 12:00 | |
1815bff5 A |
342 | -11:00 - NST 1942 |
343 | -11:00 US N%sT 1946 | |
344 | -11:00 - NST 1967 Apr | |
345 | -11:00 - BST 1969 | |
346 | -11:00 US B%sT 1983 Oct 30 2:00 | |
2fc1e207 | 347 | -9:00 US Y%sT 1983 Nov 30 |
1815bff5 | 348 | -9:00 US AK%sT |
b51d5b5f A |
349 | Zone America/Adak 12:13:21 - LMT 1867 Oct 18 |
350 | -11:46:38 - LMT 1900 Aug 20 12:00 | |
1815bff5 A |
351 | -11:00 - NST 1942 |
352 | -11:00 US N%sT 1946 | |
353 | -11:00 - NST 1967 Apr | |
354 | -11:00 - BST 1969 | |
355 | -11:00 US B%sT 1983 Oct 30 2:00 | |
2fc1e207 | 356 | -10:00 US AH%sT 1983 Nov 30 |
1815bff5 A |
357 | -10:00 US HA%sT |
358 | # Shanks writes that part of southwest Alaska (e.g. Aniak) | |
359 | # switched from -11:00 to -10:00 on 1968-09-22 at 02:00, | |
360 | # and another part (e.g. Akiak) made the same switch five weeks later. | |
361 | # These switches don't quite make our 1970 cutoff. | |
362 | ||
363 | # Hawaii | |
364 | # | |
365 | # From Arthur David Olson: | |
366 | # And then there's Hawaii. | |
367 | # DST was observed for one day in 1933; | |
368 | # standard time was changed by half an hour in 1947; | |
369 | # it's always standard as of 1986. | |
370 | # | |
371 | # From Paul Eggert: | |
372 | # Shanks says the 1933 experiment lasted for three weeks. Go with Shanks. | |
373 | # | |
374 | Zone Pacific/Honolulu -10:31:26 - LMT 1900 Jan 1 12:00 | |
375 | -10:30 - HST 1933 Apr 30 2:00 | |
376 | -10:30 1:00 HDT 1933 May 21 2:00 | |
377 | -10:30 US H%sT 1947 Jun 8 2:00 | |
378 | -10:00 - HST | |
379 | ||
1815bff5 A |
380 | # Now we turn to US areas that have diverged from the consensus since 1970. |
381 | ||
382 | # Arizona mostly uses MST. | |
c3a08f59 A |
383 | |
384 | # From Paul Eggert (2002-10-20): | |
385 | # | |
386 | # The information in the rest of this paragraph is derived from the | |
387 | # <a href="http://www.dlapr.lib.az.us/links/daylight.htm"> | |
388 | # Daylight Saving Time web page (2002-01-23)</a> maintained by the | |
389 | # Arizona State Library, Archives and Public Records. | |
390 | # Between 1944-01-01 and 1944-04-01 the State of Arizona used standard | |
391 | # time, but by federal law railroads, airlines, bus lines, military | |
392 | # personnel, and some engaged in interstate commerce continued to | |
393 | # observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix | |
394 | # Gazette says that was the date the law changed, and that 04-01 was | |
395 | # the date the state's clocks would change. In 1945 the State of | |
396 | # Arizona used standard time all year, again with exceptions only as | |
397 | # mandated by federal law. Arizona observed DST in 1967, but Arizona | |
398 | # Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. | |
399 | # | |
400 | # Shanks says the 1944 experiment came to an end on 1944-03-17. | |
401 | # Go with the Arizona State Library instead. | |
402 | ||
1815bff5 A |
403 | Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 12:00 |
404 | -7:00 US M%sT 1944 Jan 1 00:01 | |
c3a08f59 | 405 | -7:00 - MST 1944 Apr 1 00:01 |
1815bff5 A |
406 | -7:00 US M%sT 1944 Oct 1 00:01 |
407 | -7:00 - MST 1967 | |
c3a08f59 | 408 | -7:00 US M%sT 1968 Mar 21 |
1815bff5 A |
409 | -7:00 - MST |
410 | # From Arthur David Olson (1988-02-13): | |
411 | # A writer from the Inter Tribal Council of Arizona, Inc., | |
2fc1e207 | 412 | # notes in private correspondence dated 1987-12-28 that "Presently, only the |
1815bff5 A |
413 | # Navajo Nation participates in the Daylight Saving Time policy, due to its |
414 | # large size and location in three states." (The "only" means that other | |
415 | # tribal nations don't use DST.) | |
416 | ||
417 | Link America/Denver America/Shiprock | |
418 | ||
2fc1e207 A |
419 | # Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, |
420 | # Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, | |
421 | # Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, | |
422 | # Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, | |
423 | # Teton, Twin Falls, Valley, Washington counties) and eastern Oregon | |
424 | # switched four weeks late in 1974. | |
425 | # | |
1815bff5 A |
426 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
427 | Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:00 | |
428 | -8:00 US P%sT 1923 May 13 2:00 | |
429 | -7:00 US M%sT 1974 | |
430 | -7:00 - MST 1974 Feb 3 2:00 | |
431 | -7:00 US M%sT | |
432 | ||
433 | # Indiana | |
434 | # | |
b51d5b5f A |
435 | # For a map of Indiana's time zone regions, see: |
436 | # <a href="http://www.mccsc.edu/time.html"> | |
437 | # What time is it in Indiana? | |
438 | # </a> (1999-04-06) | |
439 | # | |
1815bff5 A |
440 | # From Paul Eggert (1995-12-19): |
441 | # Indiana generally observes either EST all year, or CST/CDT, | |
442 | # but areas near Cincinnati and Louisville use those cities' timekeeping | |
443 | # and in 1969 and 1970 the whole state observed daylight time; | |
444 | # and there are other exceptions as noted below. | |
445 | # Shanks partitions Indiana into 345 regions, each with its own time history, | |
446 | # and writes ``Even newspaper reports present contradictory information.'' | |
447 | # Fortunately, most of the complexity occurred before our cutoff date of 1970. | |
448 | # | |
449 | # Since 1970, EST-only Indiana has been like America/Indianapolis, | |
450 | # with exceptions noted below for Crawford, Starke, and Switzerland counties. | |
451 | # The parts of Indiana not listed below have been like America/Chicago, | |
452 | # America/Louisville, or America/New_York. | |
453 | # | |
454 | # Other than Indianapolis, the Indiana place names are so nondescript | |
455 | # that they would be ambiguous if we left them at the `America' level. | |
456 | # So we reluctantly put them all in a subdirectory `America/Indiana'. | |
457 | # | |
458 | # Most of EST-only Indiana last observed DST in 1970. | |
b51d5b5f A |
459 | |
460 | # From Paul Eggert (2001-03-06), following a tip by Markus Kuhn: | |
461 | # Pam Belluck reported in the New York Times (2001-01-31) that the | |
462 | # Indiana Legislature is considering a bill to adopt DST statewide. | |
463 | # Her article mentioned Vevay, whose post office observes a different | |
c3a08f59 | 464 | # time zone from Danner's Hardware across the street. |
b51d5b5f | 465 | |
1815bff5 A |
466 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
467 | Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D | |
468 | Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S | |
469 | Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D | |
470 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
471 | Zone America/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:00 | |
472 | -6:00 US C%sT 1920 | |
473 | -6:00 Indianapolis C%sT 1942 | |
474 | -6:00 US C%sT 1946 | |
475 | -6:00 Indianapolis C%sT 1955 Apr 24 2:00 | |
476 | -5:00 - EST 1957 Sep 29 2:00 | |
477 | -6:00 - CST 1958 Apr 27 2:00 | |
478 | -5:00 - EST 1969 | |
479 | -5:00 US E%sT 1971 | |
480 | -5:00 - EST | |
481 | Link America/Indianapolis America/Indiana/Indianapolis | |
482 | # | |
483 | # Part of Crawford County, Indiana, last observed DST in 1975, | |
484 | # and left its clocks alone in 1974. | |
485 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER | |
486 | Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D | |
487 | Rule Marengo 1951 only - Sep lastSun 2:00 0 S | |
488 | Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D | |
489 | Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S | |
490 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
491 | Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:00 | |
492 | -6:00 US C%sT 1951 | |
493 | -6:00 Marengo C%sT 1961 Apr 30 2:00 | |
494 | -5:00 - EST 1969 | |
495 | -5:00 US E%sT 1974 Jan 6 2:00 | |
496 | -6:00 1:00 CDT 1974 Oct 27 2:00 | |
497 | -5:00 US E%sT 1976 | |
498 | -5:00 - EST | |
499 | # | |
500 | # Starke County, Indiana | |
501 | # From Arthur David Olson (1991-10-28): | |
502 | # An article on page A3 of the Sunday, 1991-10-27 Washington Post | |
503 | # notes that Starke County switched from Central time to Eastern time as of | |
504 | # 1991-10-27. | |
505 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER | |
506 | Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D | |
507 | Rule Starke 1947 1954 - Sep lastSun 2:00 0 S | |
508 | Rule Starke 1955 1956 - Oct lastSun 2:00 0 S | |
509 | Rule Starke 1957 1958 - Sep lastSun 2:00 0 S | |
510 | Rule Starke 1959 1961 - Oct lastSun 2:00 0 S | |
511 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
512 | Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:00 | |
513 | -6:00 US C%sT 1947 | |
514 | -6:00 Starke C%sT 1962 Apr 29 2:00 | |
515 | -5:00 - EST 1963 Oct 27 2:00 | |
516 | -6:00 US C%sT 1991 Oct 27 2:00 | |
517 | -5:00 - EST | |
518 | # | |
519 | # Switzerland County, Indiana, last observed DST in 1972. | |
520 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
521 | Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:00 | |
522 | -6:00 US C%sT 1954 Apr 25 2:00 | |
523 | -5:00 - EST 1969 | |
524 | -5:00 US E%sT 1973 | |
525 | -5:00 - EST | |
526 | ||
527 | # Part of Kentucky left its clocks alone in 1974. | |
b51d5b5f | 528 | # This also includes a part of Indiana immediately adjacent to Louisville. |
1815bff5 A |
529 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
530 | Rule Louisville 1921 only - May 1 2:00 1:00 D | |
531 | Rule Louisville 1921 only - Sep 1 2:00 0 S | |
532 | Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D | |
533 | Rule Louisville 1941 only - Sep lastSun 2:00 0 S | |
534 | Rule Louisville 1946 only - Jun 2 2:00 0 S | |
535 | Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S | |
536 | Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S | |
537 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
538 | Zone America/Louisville -5:43:02 - LMT 1883 Nov 18 12:00 | |
539 | -6:00 US C%sT 1921 | |
540 | -6:00 Louisville C%sT 1942 | |
541 | -6:00 US C%sT 1946 | |
542 | -6:00 Louisville C%sT 1961 Jul 23 2:00 | |
543 | -5:00 - EST 1968 | |
544 | -5:00 US E%sT 1974 Jan 6 2:00 | |
545 | -6:00 1:00 CDT 1974 Oct 27 2:00 | |
546 | -5:00 US E%sT | |
b51d5b5f A |
547 | Link America/Louisville America/Kentucky/Louisville |
548 | # | |
549 | # Wayne, Clinton, and Russell Counties, Kentucky | |
550 | # | |
551 | # From | |
552 | # <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml"> | |
553 | # Lake Cumberland LIFE | |
554 | # </a> (1999-01-29) via WKYM-101.7: | |
555 | # Clinton County has joined Wayne County in asking the DoT to change from | |
556 | # the Central to the Eastern time zone.... The Wayne County government made | |
557 | # the same request in December. And while Russell County officials have not | |
558 | # taken action, the majority of respondents to a poll conducted there in | |
559 | # August indicated they would like to change to "fast time" also. | |
560 | # The three Lake Cumberland counties are the farthest east of any U.S. | |
561 | # location in the Central time zone. | |
562 | # | |
563 | # From Rich Wales (2000-08-29): | |
564 | # After prolonged debate, and despite continuing deep differences of opinion, | |
565 | # Wayne County (central Kentucky) is switching from Central (-0600) to Eastern | |
566 | # (-0500) time. They won't "fall back" this year. See Sara Shipley, | |
567 | # The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). | |
c3a08f59 A |
568 | # |
569 | # From Paul Eggert (2001-07-16): | |
570 | # The final rule was published in the | |
571 | # <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22"> | |
572 | # Federal Register 65, 160 (2000-08-17), page 50154-50158. | |
573 | # </a> | |
574 | # | |
b51d5b5f A |
575 | Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:00 |
576 | -6:00 US C%sT 1946 | |
577 | -6:00 - CST 1968 | |
578 | -6:00 US C%sT 2000 Oct 29 2:00 | |
579 | -5:00 US E%sT | |
580 | ||
581 | ||
582 | # From Rives McDow (2000-08-30): | |
583 | # Here ... are all the changes in the US since 1985. | |
584 | # Kearny County, KS (put all of county on central; | |
585 | # previously split between MST and CST) ... 1990-10 | |
586 | # Starke County, IN (from CST to EST) ... 1991-10 | |
587 | # Oliver County, ND (from MST to CST) ... 1992-10 | |
588 | # West Wendover, NV (from PST TO MST) ... 1999-10 | |
589 | # Wayne County, KY (from CST to EST) ... 2000-10 | |
b51d5b5f | 590 | # |
c3a08f59 A |
591 | # From Paul Eggert (2001-07-17): |
592 | # We don't know where the line used to be within Kearny County, KS, | |
593 | # so omit that change for now. | |
594 | # See America/Indiana/Knox for the Starke County, IN change. | |
595 | # See America/North_Dakota/Center for the Oliver County, ND change. | |
596 | # West Wendover, NV officially switched from Pacific to mountain time on | |
597 | # 1999-10-31. See the | |
598 | # <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15"> | |
599 | # Federal Register 64, 203 (1999-10-21), page 56705-56707. | |
600 | # </a> | |
601 | # However, the Federal Register says that West Wendover already operated | |
602 | # on mountain time, and the rule merely made this official; | |
603 | # hence a separate tz entry is not needed. | |
1815bff5 A |
604 | |
605 | # Michigan | |
606 | # | |
607 | # From Bob Devine (1988-01-28): | |
608 | # Michigan didn't observe DST from 1968 to 1973. | |
609 | # | |
b51d5b5f A |
610 | # From Paul Eggert (1999-03-31): |
611 | # Shanks writes that Michigan started using standard time on 1885-09-18, | |
612 | # but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) | |
613 | # that Detroit kept | |
1815bff5 A |
614 | # |
615 | # local time until 1900 when the City Council decreed that clocks should | |
616 | # be put back twenty-eight minutes to Central Standard Time. Half the | |
617 | # city obeyed, half refused. After considerable debate, the decision | |
618 | # was rescinded and the city reverted to Sun time. A derisive offer to | |
619 | # erect a sundial in front of the city hall was referred to the | |
620 | # Committee on Sewers. Then, in 1905, Central time was adopted | |
621 | # by city vote. | |
622 | # | |
623 | # This story is too entertaining to be false, so go with Howse over Shanks. | |
624 | # | |
b51d5b5f A |
625 | # From Paul Eggert (2001-03-06): |
626 | # Garland (1927) writes ``Cleveland and Detroit advanced their clocks | |
627 | # one hour in 1914.'' This change is not in Shanks. We have no more | |
628 | # info, so omit this for now. | |
629 | # | |
1815bff5 A |
630 | # Most of Michigan observed DST from 1973 on, but was a bit late in 1975. |
631 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER | |
632 | Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D | |
633 | Rule Detroit 1948 only - Sep lastSun 2:00 0 S | |
634 | Rule Detroit 1967 only - Jun 14 2:00 1:00 D | |
635 | Rule Detroit 1967 only - Oct lastSun 2:00 0 S | |
636 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
637 | Zone America/Detroit -5:32:11 - LMT 1905 | |
638 | -6:00 - CST 1915 May 15 2:00 | |
639 | -5:00 - EST 1942 | |
640 | -5:00 US E%sT 1946 | |
641 | -5:00 Detroit E%sT 1973 | |
642 | -5:00 US E%sT 1975 | |
643 | -5:00 - EST 1975 Apr 27 2:00 | |
644 | -5:00 US E%sT | |
645 | # | |
646 | # The Michigan border with Wisconsin switched from EST to CST/CDT in 1973. | |
647 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER | |
648 | Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D | |
649 | Rule Menominee 1946 only - Sep lastSun 2:00 0 S | |
650 | Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D | |
651 | Rule Menominee 1966 only - Oct lastSun 2:00 0 S | |
652 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
653 | Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 | |
654 | -6:00 US C%sT 1946 | |
655 | -6:00 Menominee C%sT 1969 Apr 27 2:00 | |
656 | -5:00 - EST 1973 Apr 29 2:00 | |
657 | -6:00 US C%sT | |
658 | ||
659 | # Navassa | |
c3a08f59 | 660 | # administered by the US Fish and Wildlife Service |
b51d5b5f A |
661 | # claimed by US under the provisions of the 1856 Guano Islands Act |
662 | # also claimed by Haiti | |
663 | # occupied 1857/1900 by the Navassa Phosphate Co | |
c3a08f59 | 664 | # US lighthouse 1917/1996-09 |
b51d5b5f A |
665 | # currently uninhabited |
666 | # see Mark Fineman, ``An Isle Rich in Guano and Discord'', | |
667 | # _Los Angeles Times_ (1998-11-10), A1, A10; it cites | |
668 | # Jimmy Skaggs, _The Great Guano Rush_ (1994). | |
1815bff5 A |
669 | |
670 | # Old names, for S5 users | |
671 | ||
672 | # Link LINK-FROM LINK-TO | |
673 | Link America/New_York EST5EDT | |
674 | Link America/Chicago CST6CDT | |
675 | Link America/Denver MST7MDT | |
676 | Link America/Los_Angeles PST8PDT | |
677 | Link America/Indianapolis EST | |
678 | Link America/Phoenix MST | |
679 | Link Pacific/Honolulu HST | |
680 | ||
681 | ################################################################################ | |
682 | ||
683 | ||
b51d5b5f | 684 | # From Paul Eggert <eggert@twinsun.com> (1999-10-29): |
1815bff5 | 685 | # A good source for time zone historical data outside the US is |
b51d5b5f A |
686 | # Thomas G. Shanks, The International Atlas (5th edition), |
687 | # San Diego: ACS Publications, Inc. (1999). | |
1815bff5 | 688 | # |
c3a08f59 | 689 | # Gwillim Law writes that a good source |
1815bff5 A |
690 | # for recent time zone data is the International Air Transport |
691 | # Association's Standard Schedules Information Manual (IATA SSIM), | |
692 | # published semiannually. Law sent in several helpful summaries | |
693 | # of the IATA's data after 1990. | |
694 | # | |
695 | # Except where otherwise noted, Shanks is the source for entries through 1990, | |
696 | # and IATA SSIM is the source for entries after 1990. | |
697 | # | |
2fc1e207 A |
698 | # Other sources occasionally used include: |
699 | # | |
700 | # Edward W. Whitman, World Time Differences, | |
701 | # Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), | |
702 | # which I found in the UCLA library. | |
703 | # | |
704 | # <a href="http://www.pettswoodvillage.co.uk/Daylight_Savings_William_Willett.pdf"> | |
705 | # William Willett, The Waste of Daylight, 19th edition | |
706 | # </a> (1914-03) | |
1815bff5 A |
707 | # |
708 | # See the `europe' file for Greenland. | |
1815bff5 A |
709 | |
710 | # Canada | |
711 | ||
712 | # From Alain LaBont<e'> <ALB@immedia.ca> (1994-11-14): | |
713 | # I post here the time zone abbreviations standardized in Canada | |
714 | # for both English and French in the CAN/CSA-Z234.4-89 standard.... | |
715 | # | |
716 | # UTC Standard time Daylight savings time | |
717 | # offset French English French English | |
718 | # -2:30 - - HAT NDT | |
719 | # -3 - - HAA ADT | |
720 | # -3:30 HNT NST - - | |
721 | # -4 HNA AST HAE EDT | |
722 | # -5 HNE EST HAC CDT | |
723 | # -6 HNC CST HAR MDT | |
724 | # -7 HNR MST HAP PDT | |
725 | # -8 HNP PST HAY YDT | |
726 | # -9 HNY YST - - | |
727 | # | |
728 | # HN: Heure Normale ST: Standard Time | |
729 | # HA: Heure Avanc<e'>e DT: Daylight saving Time | |
730 | # | |
731 | # A: de l'Atlantique Atlantic | |
732 | # C: du Centre Central | |
733 | # E: de l'Est Eastern | |
734 | # M: Mountain | |
735 | # N: Newfoundland | |
736 | # P: du Pacifique Pacific | |
737 | # R: des Rocheuses | |
738 | # T: de Terre-Neuve | |
739 | # Y: du Yukon Yukon | |
740 | # | |
741 | # From Paul Eggert <eggert@twinsun.com> (1994-11-22): | |
742 | # Alas, this sort of thing must be handled by localization software. | |
743 | ||
b51d5b5f | 744 | # Unless otherwise specified, the data for Canada are all from Shanks. |
1815bff5 | 745 | |
b51d5b5f A |
746 | # From Paul Eggert (2000-10-02): |
747 | # H. David Matthews and Mary Vincent's map | |
748 | # <a href="http://www.canadiangeographic.ca/SO98/geomap.htm"> | |
749 | # "It's about TIME", _Canadian Geographic_ (September-October 1998) | |
750 | # </a> contains detailed boundaries for regions observing nonstandard | |
751 | # time and daylight saving time arrangements in Canada circa 1998. | |
752 | # | |
753 | # INMS, the Institute for National Measurement Standards in Ottawa, has | |
754 | # <a href="http://www.nrc.ca/inms/time/tze.html"> | |
755 | # information about standard and daylight saving time zones in Canada. | |
756 | # </a> (updated periodically). | |
757 | # Its unofficial information is often taken from Matthews and Vincent. | |
1815bff5 A |
758 | |
759 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
760 | Rule Canada 1918 only - Apr 14 2:00 1:00 D | |
761 | Rule Canada 1918 only - Oct 31 2:00 0 S | |
2fc1e207 A |
762 | Rule Canada 1942 only - Feb 9 2:00 1:00 W # War |
763 | Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace | |
1815bff5 A |
764 | Rule Canada 1945 only - Sep 30 2:00 0 S |
765 | Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D | |
766 | Rule Canada 1974 max - Oct lastSun 2:00 0 S | |
767 | Rule Canada 1987 max - Apr Sun>=1 2:00 1:00 D | |
768 | ||
769 | ||
b51d5b5f A |
770 | # Newfoundland (and far southeast Labrador) |
771 | ||
772 | # From Paul Eggert (2000-10-02): | |
773 | # Matthews and Vincent (1998) write that Labrador should use NST/NDT, | |
774 | # but the only part of Labrador that follows the rules is the | |
775 | # southeast corner, including Port Hope Simpson and Mary's Harbour, | |
776 | # but excluding, say, Black Tickle. | |
1815bff5 A |
777 | |
778 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
2fc1e207 | 779 | Rule StJohns 1917 only - Apr 8 2:00 1:00 D |
1815bff5 | 780 | Rule StJohns 1917 only - Sep 17 2:00 0 S |
1815bff5 A |
781 | # Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks. |
782 | Rule StJohns 1919 only - May 5 23:00 1:00 D | |
783 | Rule StJohns 1919 only - Aug 12 23:00 0 S | |
784 | # For 1931-1935 Whitman gives Apr same date; go with Shanks. | |
785 | Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D | |
786 | Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S | |
2fc1e207 A |
787 | # For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks. |
788 | Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D | |
789 | Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S | |
790 | # Whitman gives the following transitions: | |
791 | # 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 | |
792 | # but go with Shanks and assume they used Canadian rules. | |
1815bff5 A |
793 | # For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives |
794 | # Apr 30 - Sep 24; go with Shanks. | |
795 | Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D | |
796 | Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S | |
797 | Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D | |
798 | Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S | |
b51d5b5f A |
799 | Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S |
800 | # From Paul Eggert (2000-10-02): | |
801 | # INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches | |
802 | # at 00:01 local time. For now, assume it started in 1987. | |
803 | Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D | |
804 | Rule StJohns 1987 max - Oct lastSun 0:01 0 S | |
805 | Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD | |
806 | Rule StJohns 1989 max - Apr Sun>=1 0:01 1:00 D | |
1815bff5 A |
807 | # St John's has an apostrophe, but Posix file names can't have apostrophes. |
808 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
809 | Zone America/St_Johns -3:30:52 - LMT 1884 | |
2fc1e207 A |
810 | -3:30:52 StJohns N%sT 1918 |
811 | -3:30:52 Canada N%sT 1919 | |
1815bff5 | 812 | -3:30:52 StJohns N%sT 1935 Mar 30 |
2fc1e207 A |
813 | -3:30 StJohns N%sT 1942 May 11 |
814 | -3:30 Canada N%sT 1946 | |
1815bff5 A |
815 | -3:30 StJohns N%sT |
816 | ||
b51d5b5f | 817 | # most of east Labrador |
1815bff5 A |
818 | |
819 | # The name `Happy Valley-Goose Bay' is too long; use `Goose Bay'. | |
820 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
821 | Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay | |
2fc1e207 A |
822 | -3:30:52 - NST 1918 |
823 | -3:30:52 Canada N%sT 1919 | |
1815bff5 A |
824 | -3:30:52 - NST 1935 Mar 30 |
825 | -3:30 - NST 1936 | |
2fc1e207 A |
826 | -3:30 StJohns N%sT 1942 May 11 |
827 | -3:30 Canada N%sT 1946 | |
1815bff5 A |
828 | -3:30 StJohns N%sT 1966 Mar 15 2:00 |
829 | -4:00 StJohns A%sT | |
830 | ||
831 | ||
832 | # west Labrador, New Brunswick, Nova Scotia, Prince Edward I | |
833 | ||
834 | # From Paul Eggert (1996-06-12): | |
835 | # Shanks writes that since 1970 most of this region has been like Halifax. | |
836 | # Many locales did not observe peacetime DST until 1972; | |
837 | # Glace Bay, NS is the largest that we know of. | |
838 | # Shanks also writes that Liverpool, NS was the only town in Canada to observe | |
839 | # DST in 1971 but not 1970; for now we'll assume this is a typo. | |
840 | ||
b51d5b5f A |
841 | # From Paul Eggert (2000-10-02): |
842 | # INMS (2000-09-12) says that, since 1988 at least, New Brunswick switches | |
843 | # at 00:01 local time. FIXME: verify and create a new Zone for this. | |
844 | ||
845 | ||
1815bff5 A |
846 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
847 | Rule Halifax 1916 only - Apr 1 0:00 1:00 D | |
848 | Rule Halifax 1916 only - Oct 1 0:00 0 S | |
1815bff5 A |
849 | Rule Halifax 1920 only - May 9 0:00 1:00 D |
850 | Rule Halifax 1920 only - Aug 29 0:00 0 S | |
851 | Rule Halifax 1921 only - May 6 0:00 1:00 D | |
852 | Rule Halifax 1921 1922 - Sep 5 0:00 0 S | |
853 | Rule Halifax 1922 only - Apr 30 0:00 1:00 D | |
854 | Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D | |
855 | Rule Halifax 1923 only - Sep 4 0:00 0 S | |
856 | Rule Halifax 1924 only - Sep 15 0:00 0 S | |
857 | Rule Halifax 1925 only - Sep 28 0:00 0 S | |
858 | Rule Halifax 1926 only - May 16 0:00 1:00 D | |
859 | Rule Halifax 1926 only - Sep 13 0:00 0 S | |
860 | Rule Halifax 1927 only - May 1 0:00 1:00 D | |
861 | Rule Halifax 1927 only - Sep 26 0:00 0 S | |
862 | Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D | |
863 | Rule Halifax 1928 only - Sep 9 0:00 0 S | |
864 | Rule Halifax 1929 only - Sep 3 0:00 0 S | |
865 | Rule Halifax 1930 only - Sep 15 0:00 0 S | |
866 | Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S | |
2fc1e207 | 867 | Rule Halifax 1932 only - May 1 0:00 1:00 D |
1815bff5 A |
868 | Rule Halifax 1933 only - Apr 30 0:00 1:00 D |
869 | Rule Halifax 1933 only - Oct 2 0:00 0 S | |
870 | Rule Halifax 1934 only - May 20 0:00 1:00 D | |
871 | Rule Halifax 1934 only - Sep 16 0:00 0 S | |
872 | Rule Halifax 1935 only - Jun 2 0:00 1:00 D | |
873 | Rule Halifax 1935 only - Sep 30 0:00 0 S | |
874 | Rule Halifax 1936 only - Jun 1 0:00 1:00 D | |
875 | Rule Halifax 1936 only - Sep 14 0:00 0 S | |
876 | Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D | |
877 | Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S | |
878 | Rule Halifax 1939 only - May 28 0:00 1:00 D | |
879 | Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D | |
2fc1e207 A |
880 | Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S |
881 | Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D | |
882 | Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S | |
883 | Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D | |
884 | Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S | |
885 | Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D | |
886 | Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D | |
887 | Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S | |
1815bff5 A |
888 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
889 | Zone America/Halifax -4:14:24 - LMT 1902 Jun 15 | |
2fc1e207 A |
890 | -4:00 Halifax A%sT 1918 |
891 | -4:00 Canada A%sT 1919 | |
892 | -4:00 Halifax A%sT 1942 Feb 9 2:00s | |
893 | -4:00 Canada A%sT 1946 | |
894 | -4:00 Halifax A%sT 1974 | |
895 | -4:00 Canada A%sT | |
1815bff5 A |
896 | Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 |
897 | -4:00 Canada A%sT 1953 | |
898 | -4:00 Halifax A%sT 1954 | |
899 | -4:00 - AST 1972 | |
2fc1e207 A |
900 | -4:00 Halifax A%sT 1974 |
901 | -4:00 Canada A%sT | |
1815bff5 A |
902 | |
903 | ||
904 | # Ontario, Quebec | |
905 | ||
906 | # From Paul Eggert (1996-06-12): | |
2fc1e207 A |
907 | # Shanks writes that since 1970 most of Ontario has been like Toronto, |
908 | # and most of Quebec has been like Montreal. | |
1815bff5 A |
909 | # Thunder Bay skipped DST in 1973. |
910 | # Many smaller locales did not observe peacetime DST until 1974; | |
911 | # Nipigon (EST) and Rainy River (CST) are the largest that we know of. | |
912 | # Far west Ontario is like Winnipeg; far east Quebec is like Halifax. | |
913 | ||
2fc1e207 A |
914 | # From Mark Brader (2003-07-26): |
915 | # [According to the Toronto Star] Orillia, Ontario, adopted DST | |
916 | # effective Saturday, 1912-06-22, 22:00; the article mentions that | |
917 | # Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw | |
918 | # have already done so. In Orillia DST was to run until Saturday, | |
919 | # 1912-08-31 (no time mentioned), but it was met with considerable | |
920 | # hostility from certain segments of the public, and was revoked after | |
921 | # only two weeks -- I copied it as Saturday, 1912-07-07, 22:00, but | |
922 | # presumably that should be -07-06. (1912-06-19, -07-12; also letters | |
923 | # earlier in June). | |
924 | # | |
925 | # Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). | |
926 | ||
b51d5b5f | 927 | # From Paul Eggert (1997-10-17): |
2fc1e207 | 928 | # Mark Brader writes that an article in the 1997-10-14 Toronto Star |
b51d5b5f A |
929 | # says that Atikokan, Ontario currently does not observe DST, |
930 | # but will vote on 11-10 whether to use EST/EDT. | |
931 | # He also writes that the | |
932 | # <a href="http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html"> | |
933 | # Ontario Time Act (1990, Chapter T.9) | |
934 | # </a> | |
935 | # says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. | |
936 | # Officially Atikokan is therefore on CST/CDT, and most likely this report | |
937 | # concerns a non-official time observed as a matter of local practice. | |
938 | # For what it's worth, Shanks says that Atikokan has agreed with | |
939 | # Rainy River ever since standard time was introduced. | |
940 | ||
941 | # From Paul Eggert (2000-10-02): | |
942 | # Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and | |
943 | # New Osnaburgh observe CST all year, that Big Trout Lake observes | |
944 | # CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in | |
945 | # violation of the official Ontario rules. | |
946 | # They also write that Quebec east of the -63 meridian is supposed to | |
947 | # observe AST, but residents as far east as Natashquan use EST/EDT, | |
948 | # and residents east of Natashquan use AST. | |
949 | # We probably need Zones for far east Quebec and for Atikokan, | |
950 | # but we don't know when their practices started. | |
951 | ||
1815bff5 A |
952 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
953 | Rule Mont 1917 only - Mar 25 2:00 1:00 D | |
954 | Rule Mont 1917 only - Apr 24 0:00 0 S | |
1815bff5 A |
955 | Rule Mont 1919 only - Mar 31 2:30 1:00 D |
956 | Rule Mont 1919 only - Oct 25 2:30 0 S | |
957 | Rule Mont 1920 only - May 2 2:30 1:00 D | |
2fc1e207 | 958 | Rule Mont 1920 1922 - Oct Sun>=1 2:30 0 S |
1815bff5 | 959 | Rule Mont 1921 only - May 1 2:00 1:00 D |
1815bff5 | 960 | Rule Mont 1922 only - Apr 30 2:00 1:00 D |
1815bff5 A |
961 | Rule Mont 1924 only - May 17 2:00 1:00 D |
962 | Rule Mont 1924 1926 - Sep lastSun 2:30 0 S | |
963 | Rule Mont 1925 1926 - May Sun>=1 2:00 1:00 D | |
2fc1e207 A |
964 | # The 1927-to-1937 rules can be expressed more simply as |
965 | # Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D | |
966 | # Rule Mont 1927 1937 - Sep lastSat 24:00 0 S | |
967 | # The rules below avoid use of 24:00 | |
968 | # (which pre-1998 versions of zic cannot handle). | |
969 | Rule Mont 1927 only - May 1 0:00 1:00 D | |
970 | Rule Mont 1927 1932 - Sep lastSun 0:00 0 S | |
971 | Rule Mont 1928 1931 - Apr lastSun 0:00 1:00 D | |
972 | Rule Mont 1932 only - May 1 0:00 1:00 D | |
973 | Rule Mont 1933 1940 - Apr lastSun 0:00 1:00 D | |
974 | Rule Mont 1933 only - Oct 1 0:00 0 S | |
975 | Rule Mont 1934 1939 - Sep lastSun 0:00 0 S | |
976 | Rule Mont 1946 1973 - Apr lastSun 2:00 1:00 D | |
1815bff5 | 977 | Rule Mont 1945 1948 - Sep lastSun 2:00 0 S |
1815bff5 A |
978 | Rule Mont 1949 1950 - Oct lastSun 2:00 0 S |
979 | Rule Mont 1951 1956 - Sep lastSun 2:00 0 S | |
2fc1e207 A |
980 | Rule Mont 1957 1973 - Oct lastSun 2:00 0 S |
981 | ||
982 | Rule Toronto 1919 only - Mar 30 23:30 1:00 D | |
983 | Rule Toronto 1919 only - Oct 26 0:00 0 S | |
984 | Rule Toronto 1920 only - May 2 2:00 1:00 D | |
985 | Rule Toronto 1920 only - Sep 26 0:00 0 S | |
986 | Rule Toronto 1921 only - May 15 2:00 1:00 D | |
987 | Rule Toronto 1921 only - Sep 15 2:00 0 S | |
988 | Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D | |
989 | # Shanks says 1923-09-19; assume it's a typo and that "-16" was meant. | |
990 | Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S | |
991 | Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D | |
992 | # The 1927-to-1939 rules can be expressed more simply as | |
993 | # Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S | |
994 | # Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D | |
995 | # Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D | |
996 | # Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S | |
997 | # The rules below avoid use of Sun>=25 | |
998 | # (which pre-2004 versions of zic cannot handle). | |
999 | Rule Toronto 1927 1932 - Sep lastSun 2:00 0 S | |
1000 | Rule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D | |
1001 | Rule Toronto 1932 only - May 1 2:00 1:00 D | |
1002 | Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D | |
1003 | Rule Toronto 1933 only - Oct 1 2:00 0 S | |
1004 | Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S | |
1005 | Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S | |
1006 | Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D | |
1007 | Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D | |
1008 | Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S | |
1009 | Rule Toronto 1949 only - Nov lastSun 0:00 0 S | |
1010 | Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D | |
1011 | Rule Toronto 1950 only - Nov lastSun 2:00 0 S | |
1012 | Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S | |
1013 | # Shanks says Toronto ended DST a week early in 1971, namely on 1971-10-24, | |
1014 | # but Mark Brader wrote (2003-05-31) that he checked the 1971-10-30 issue | |
1015 | # of the Toronto Star, and it said that DST ended 1971-10-31 as usual. | |
1016 | Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S | |
1017 | ||
1018 | # From Paul Eggert (2003-07-27): | |
1019 | # Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and | |
1020 | # Port Arthur, Ontario, the principle of the Bill has been in | |
1021 | # operation for the past three years, and in the City of Moose Jaw, | |
1022 | # Saskatchewan, for one year." | |
1023 | ||
1024 | # From David Bryan via Tory Tronrud, Director/Curator, | |
1025 | # Thunder Bay Museum (2003-11-12): | |
1026 | # There is some suggestion, however, that, by-law or not, daylight | |
1027 | # savings time was being practiced in Fort William and Port Arthur | |
1028 | # before 1909.... [I]n 1910, the line between the Eastern and Central | |
1029 | # Time Zones was permanently moved about two hundred miles west to | |
1030 | # include the Thunder Bay area.... When Canada adopted daylight | |
1031 | # savings time in 1916, Fort William and Port Arthur, having done so | |
1032 | # already, did not change their clocks.... During the Second World | |
1033 | # War,... [t]he cities agreed to implement DST during the summer | |
1034 | # months for the remainder of the war years. | |
1035 | ||
1815bff5 A |
1036 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
1037 | Zone America/Montreal -4:54:16 - LMT 1884 | |
2fc1e207 A |
1038 | -5:00 Mont E%sT 1918 |
1039 | -5:00 Canada E%sT 1919 | |
1040 | -5:00 Mont E%sT 1942 Feb 9 2:00s | |
1041 | -5:00 Canada E%sT 1946 | |
1042 | -5:00 Mont E%sT 1974 | |
1043 | -5:00 Canada E%sT | |
1044 | Zone America/Toronto -5:17:32 - LMT 1895 | |
1045 | -5:00 Canada E%sT 1919 | |
1046 | -5:00 Toronto E%sT 1942 Feb 9 2:00s | |
1047 | -5:00 Canada E%sT 1946 | |
1048 | -5:00 Toronto E%sT 1974 | |
1049 | -5:00 Canada E%sT | |
1815bff5 | 1050 | Zone America/Thunder_Bay -5:57:00 - LMT 1895 |
2fc1e207 A |
1051 | -6:00 - CST 1910 |
1052 | -5:00 - EST 1942 | |
1815bff5 A |
1053 | -5:00 Canada E%sT 1970 |
1054 | -5:00 Mont E%sT 1973 | |
1055 | -5:00 - EST 1974 | |
1056 | -5:00 Canada E%sT | |
1057 | Zone America/Nipigon -5:53:04 - LMT 1895 | |
2fc1e207 A |
1058 | -5:00 Canada E%sT 1940 Sep 29 |
1059 | -5:00 1:00 EDT 1942 Feb 9 2:00s | |
1815bff5 A |
1060 | -5:00 Canada E%sT |
1061 | Zone America/Rainy_River -6:17:56 - LMT 1895 | |
2fc1e207 A |
1062 | -6:00 Canada C%sT 1940 Sep 29 |
1063 | -6:00 1:00 CDT 1942 Feb 9 2:00s | |
1815bff5 A |
1064 | -6:00 Canada C%sT |
1065 | ||
1066 | ||
1067 | # Manitoba | |
1068 | ||
1069 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
1070 | Rule Winn 1916 only - Apr 23 0:00 1:00 D | |
1071 | Rule Winn 1916 only - Sep 17 0:00 0 S | |
1072 | Rule Winn 1918 only - Apr 14 2:00 1:00 D | |
1073 | Rule Winn 1918 only - Oct 31 2:00 0 S | |
1074 | Rule Winn 1937 only - May 16 2:00 1:00 D | |
1075 | Rule Winn 1937 only - Sep 26 2:00 0 S | |
2fc1e207 A |
1076 | Rule Winn 1942 only - Feb 9 2:00 1:00 W # War |
1077 | Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace | |
1815bff5 A |
1078 | Rule Winn 1945 only - Sep lastSun 2:00 0 S |
1079 | Rule Winn 1946 only - May 12 2:00 1:00 D | |
1080 | Rule Winn 1946 only - Oct 13 2:00 0 S | |
1081 | Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D | |
1082 | Rule Winn 1947 1949 - Sep lastSun 2:00 0 S | |
1083 | Rule Winn 1950 only - May 1 2:00 1:00 D | |
1084 | Rule Winn 1950 only - Sep 30 2:00 0 S | |
1085 | Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D | |
1086 | Rule Winn 1951 1958 - Sep lastSun 2:00 0 S | |
1087 | Rule Winn 1959 only - Oct lastSun 2:00 0 S | |
1088 | Rule Winn 1960 only - Sep lastSun 2:00 0 S | |
1089 | Rule Winn 1963 only - Apr lastSun 2:00 1:00 D | |
1090 | Rule Winn 1963 only - Sep 22 2:00 0 S | |
1091 | Rule Winn 1966 1986 - Apr lastSun 2:00 1:00 D | |
b51d5b5f | 1092 | Rule Winn 1966 1986 - Oct lastSun 2:00 0 S |
1815bff5 | 1093 | Rule Winn 1987 max - Apr Sun>=1 2:00 1:00 D |
b51d5b5f A |
1094 | # From Paul Eggert (2000-10-02): |
1095 | # INMS (2000-09-12) says that, since 1988 at least, Manitoba switches from | |
1096 | # DST at 03:00 local time. For now, assume it started in 1987. | |
1097 | Rule Winn 1987 max - Oct lastSun 2:00s 0 S | |
1815bff5 A |
1098 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
1099 | Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 | |
1100 | -6:00 Winn C%sT | |
1101 | ||
1102 | ||
1103 | # Saskatchewan | |
1104 | ||
2fc1e207 A |
1105 | # From Mark Brader (2003-07-26): |
1106 | # The first actual adoption of DST in Canada was at the municipal | |
1107 | # level. As the [Toronto] Star put it (1912-06-07), "While people | |
1108 | # elsewhere have long been talking of legislation to save daylight, | |
1109 | # the city of Moose Jaw [Saskatchewan] has acted on its own hook." | |
1110 | # DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: | |
1111 | # presumably late evening, as below), and would run until "the end of | |
1112 | # the summer". The discrepancy between municipal time and railroad | |
1113 | # time was noted. | |
1114 | ||
1115 | # From Paul Eggert (2003-07-27): | |
1116 | # Willett (1914-03) notes that DST "has been in operation ... in the | |
1117 | # City of Moose Jaw, Saskatchewan, for one year." | |
1118 | ||
b51d5b5f | 1119 | # From Paul Eggert (2000-10-02): |
1815bff5 A |
1120 | # Shanks writes that since 1970 most of this region has been like Regina. |
1121 | # Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. | |
1122 | # Other western towns (e.g. Lloydminster) are like Edmonton. | |
b51d5b5f A |
1123 | # Matthews and Vincent (1998) write that Denare Beach and Creighton |
1124 | # are like Winnipeg, in violation of Saskatchewan law. | |
1815bff5 A |
1125 | |
1126 | # From W. Jones <jones@skdad.usask.ca> (1992-11-06): | |
1127 | # The. . .below is based on information I got from our law library, the | |
1128 | # provincial archives, and the provincial Community Services department. | |
1129 | # A precise history would require digging through newspaper archives, and | |
1130 | # since you didn't say what you wanted, I didn't bother. | |
1131 | # | |
1132 | # Saskatchewan is split by a time zone meridian (105W) and over the years | |
1133 | # the boundary became pretty ragged as communities near it reevaluated | |
1134 | # their affiliations in one direction or the other. In 1965 a provincial | |
1135 | # referendum favoured legislating common time practices. | |
1136 | # | |
1137 | # On 15 April 1966 the Time Act (c. T-14, Revised Statutes of | |
1138 | # Saskatchewan 1978) was proclaimed, and established that the eastern | |
1139 | # part of Saskatchewan would use CST year round, that districts in | |
1140 | # northwest Saskatchewan would by default follow CST but could opt to | |
1141 | # follow Mountain Time rules (thus 1 hour difference in the winter and | |
1142 | # zero in the summer), and that districts in southwest Saskatchewan would | |
1143 | # by default follow MT but could opt to follow CST. | |
1144 | # | |
1145 | # It took a few years for the dust to settle (I know one story of a town | |
1146 | # on one time zone having its school in another, such that a mom had to | |
1147 | # serve her family lunch in two shifts), but presently it seems that only | |
1148 | # a few towns on the border with Alberta (e.g. Lloydminster) follow MT | |
1149 | # rules any more; all other districts appear to have used CST year round | |
1150 | # since sometime in the 1960s. | |
1151 | ||
1152 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
1153 | Rule Regina 1918 only - Apr 14 2:00 1:00 D | |
1154 | Rule Regina 1918 only - Oct 31 2:00 0 S | |
1155 | Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D | |
1156 | Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S | |
1157 | Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D | |
1158 | Rule Regina 1937 only - Oct Sun>=8 0:00 0 S | |
1159 | Rule Regina 1938 only - Oct Sun>=1 0:00 0 S | |
1160 | Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S | |
2fc1e207 A |
1161 | Rule Regina 1942 only - Feb 9 2:00 1:00 W # War |
1162 | Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace | |
1815bff5 A |
1163 | Rule Regina 1945 only - Sep lastSun 2:00 0 S |
1164 | Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D | |
1165 | Rule Regina 1946 only - Oct Sun>=8 2:00 0 S | |
2fc1e207 A |
1166 | Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D |
1167 | Rule Regina 1947 1957 - Sep lastSun 2:00 0 S | |
1168 | Rule Regina 1959 only - Apr lastSun 2:00 1:00 D | |
1815bff5 A |
1169 | Rule Regina 1959 only - Oct lastSun 2:00 0 S |
1170 | # | |
1171 | Rule Swift 1957 only - Apr lastSun 2:00 1:00 D | |
1172 | Rule Swift 1957 only - Oct lastSun 2:00 0 S | |
1173 | Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D | |
1174 | Rule Swift 1959 only - Oct lastSun 2:00 0 S | |
1175 | Rule Swift 1960 1961 - Sep lastSun 2:00 0 S | |
1176 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
1177 | Zone America/Regina -6:58:36 - LMT 1905 Sep | |
1178 | -7:00 Regina M%sT 1960 Apr lastSun 2:00 | |
1179 | -6:00 - CST | |
1180 | Zone America/Swift_Current -7:11:20 - LMT 1905 Sep | |
1181 | -7:00 Canada M%sT 1946 Apr lastSun 2:00 | |
1182 | -7:00 Regina M%sT 1950 | |
1183 | -7:00 Swift M%sT 1972 Apr lastSun 2:00 | |
1184 | -6:00 - CST | |
1185 | ||
1186 | ||
1187 | # Alberta | |
1188 | ||
1189 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
1190 | Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D | |
1191 | Rule Edm 1918 only - Oct 31 2:00 0 S | |
1192 | Rule Edm 1919 only - May 27 2:00 0 S | |
1193 | Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D | |
1194 | Rule Edm 1920 only - Oct lastSun 2:00 0 S | |
1195 | Rule Edm 1921 1923 - Sep lastSun 2:00 0 S | |
2fc1e207 A |
1196 | Rule Edm 1942 only - Feb 9 2:00 1:00 W # War |
1197 | Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace | |
1815bff5 A |
1198 | Rule Edm 1945 only - Sep lastSun 2:00 0 S |
1199 | Rule Edm 1947 only - Apr lastSun 2:00 1:00 D | |
1200 | Rule Edm 1947 only - Sep lastSun 2:00 0 S | |
1201 | Rule Edm 1967 only - Apr lastSun 2:00 1:00 D | |
1202 | Rule Edm 1967 only - Oct lastSun 2:00 0 S | |
1203 | Rule Edm 1969 only - Apr lastSun 2:00 1:00 D | |
1204 | Rule Edm 1969 only - Oct lastSun 2:00 0 S | |
1205 | Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D | |
1206 | Rule Edm 1972 max - Oct lastSun 2:00 0 S | |
1207 | Rule Edm 1987 max - Apr Sun>=1 2:00 1:00 D | |
1208 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
1209 | Zone America/Edmonton -7:33:52 - LMT 1906 Sep | |
1210 | -7:00 Edm M%sT | |
1211 | ||
1212 | ||
1213 | # British Columbia | |
1214 | ||
b51d5b5f | 1215 | # From Paul Eggert (2000-10-02): |
1815bff5 | 1216 | # Shanks writes that since 1970 most of this region has been like Vancouver. |
b51d5b5f A |
1217 | # Dawson Creek uses MST. Much of east BC is like Edmonton. |
1218 | # Matthews and Vincent (1998) write that Creston is like Dawson Creek. | |
1815bff5 A |
1219 | |
1220 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
1221 | Rule Vanc 1918 only - Apr 14 2:00 1:00 D | |
1222 | Rule Vanc 1918 only - Oct 31 2:00 0 S | |
2fc1e207 A |
1223 | Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War |
1224 | Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace | |
1815bff5 A |
1225 | Rule Vanc 1945 only - Sep 30 2:00 0 S |
1226 | Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D | |
1227 | Rule Vanc 1946 only - Oct 13 2:00 0 S | |
1228 | Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S | |
1229 | Rule Vanc 1962 max - Oct lastSun 2:00 0 S | |
1230 | Rule Vanc 1987 max - Apr Sun>=1 2:00 1:00 D | |
1231 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
1232 | Zone America/Vancouver -8:12:28 - LMT 1884 | |
1233 | -8:00 Vanc P%sT | |
1234 | Zone America/Dawson_Creek -8:00:56 - LMT 1884 | |
1235 | -8:00 Canada P%sT 1947 | |
1236 | -8:00 Vanc P%sT 1972 Aug 30 2:00 | |
1237 | -7:00 - MST | |
1238 | ||
1239 | ||
b51d5b5f | 1240 | # Northwest Territories, Nunavut, Yukon |
1815bff5 | 1241 | |
b51d5b5f | 1242 | # From Paul Eggert (1999-10-29): |
1815bff5 | 1243 | # Dawson switched to PST in 1973. Inuvik switched to MST in 1979. |
1815bff5 A |
1244 | # Mathew Englander <mathew@io.org> (1996-10-07) gives the following refs: |
1245 | # * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, | |
1246 | # c. 7 defines Yukon standard time as UTC-9. This is still valid; | |
1247 | # see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). | |
1248 | # * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. | |
1249 | # * O.I.C. 1980/02 established DST. | |
1250 | # * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. | |
1251 | # Shanks says Yukon's 1973-10-28 switch was at 2:00; go with Englander. | |
1252 | ||
b51d5b5f A |
1253 | # From Rives McDow (1999-09-04): |
1254 | # Nunavut ... moved ... to incorporate the whole territory into one time zone. | |
1255 | # <a href="http://www.nunatsiaq.com/nunavut/nvt90903_13.html"> | |
1256 | # Nunavut moves to single time zone Oct. 31 | |
1257 | # </a> | |
1258 | # | |
1259 | # From Antoine Leca (1999-09-06): | |
1260 | # We then need to create a new timezone for the Kitikmeot region of Nunavut | |
1261 | # to differentiate it from the Yellowknife region. | |
1262 | ||
1263 | # From Paul Eggert (1999-09-20): | |
1264 | # <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html"> | |
1265 | # Basic Facts: The New Territory | |
c3a08f59 | 1266 | # </a> (1999) reports that Pangnirtung operates on eastern time, |
b51d5b5f | 1267 | # and that Coral Harbour does not observe DST. We don't know when |
c3a08f59 | 1268 | # Pangnirtung switched to eastern time; we'll guess 1995. |
b51d5b5f A |
1269 | # We'll ignore the claim about Coral Harbour for now, |
1270 | # since we have no further info. | |
1271 | ||
1272 | # From Rives McDow (1999-11-08): | |
1273 | # On October 31, when the rest of Nunavut went to Central time, | |
1274 | # Pangnirtung wobbled. Here is the result of their wobble: | |
1275 | # | |
1276 | # The following businesses and organizations in Pangnirtung use Central Time: | |
1277 | # | |
1278 | # First Air, Power Corp, Nunavut Construction, Health Center, RCMP, | |
1279 | # Eastern Arctic National Parks, A & D Specialist | |
1280 | # | |
1281 | # The following businesses and organizations in Pangnirtung use Eastern Time: | |
1282 | # | |
1283 | # Hamlet office, All other businesses, Both schools, Airport operator | |
1284 | # | |
1285 | # This has made for an interesting situation there, which warranted the news. | |
1286 | # No one there that I spoke with seems concerned, or has plans to | |
1287 | # change the local methods of keeping time, as it evidently does not | |
1288 | # really interfere with any activities or make things difficult locally. | |
1289 | # They plan to celebrate New Year's turn-over twice, one hour apart, | |
1290 | # so it appears that the situation will last at least that long. | |
1291 | # The Nunavut Intergovernmental Affairs hopes that they will "come to | |
1292 | # their senses", but the locals evidently don't see any problem with | |
1293 | # the current state of affairs. | |
1294 | ||
1295 | # From Michaela Rodrigue, writing in the | |
1296 | # <a href="http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html"> | |
1297 | # Nunatsiaq News (1999-11-19)</a>: | |
1298 | # Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, | |
1299 | # central - or Nunavut time - for government offices, and eastern time | |
1300 | # for municipal offices and schools.... Igloolik [was similar but then] | |
1301 | # made the switch to central time on Saturday, Nov. 6. | |
1302 | ||
1303 | # From Paul Eggert (2000-10-02): | |
1304 | # Matthews and Vincent (1998) say the following, but we lack histories | |
1305 | # for these potential new Zones. | |
1306 | # | |
1307 | # The Canadian Forces station at Alert uses Eastern Time while the | |
1308 | # handful of residents at the Eureka weather station [in the Central | |
1309 | # zone] skip daylight savings. Baffin Island, which is crossed by the | |
1310 | # Central, Eastern and Atlantic Time zones only uses Eastern Time. | |
1311 | # Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of | |
1312 | # Central Time and Southampton Island [in the Central zone] is not | |
1313 | # required to use daylight savings. | |
1314 | ||
1315 | # From | |
1316 | # <a href="http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html"> | |
1317 | # Nunavut now has two time zones | |
1318 | # </a> (2000-11-10): | |
1319 | # The Nunavut government would allow its employees in Kugluktuk and | |
1320 | # Cambridge Bay to operate on central time year-round, putting them | |
1321 | # one hour behind the rest of Nunavut for six months during the winter. | |
1322 | # At the end of October the two communities had rebelled against | |
1323 | # Nunavut's unified time zone, refusing to shift to eastern time with | |
1324 | # the rest of the territory for the winter. Cambridge Bay remained on | |
1325 | # central time, while Kugluktuk, even farther west, reverted to | |
1326 | # mountain time, which they had used before the advent of Nunavut's | |
1327 | # unified time zone in 1999. | |
1328 | # | |
1329 | # From Rives McDow (2001-01-20), quoting the Nunavut government: | |
1330 | # The preceding decision came into effect at midnight, Saturday Nov 4, 2000. | |
1331 | ||
1332 | # From Paul Eggert (2000-12-04): | |
1333 | # Let's just keep track of the official times for now. | |
1334 | ||
1335 | # From Rives McDow (2001-03-07): | |
1336 | # The premier of Nunavut has issued a ministerial statement advising | |
1337 | # that effective 2001-04-01, the territory of Nunavut will revert | |
1338 | # back to three time zones (mountain, central, and eastern). Of the | |
1339 | # cities in Nunavut, Coral Harbor is the only one that I know of that | |
1340 | # has said it will not observe dst, staying on EST year round. I'm | |
1341 | # checking for more info, and will get back to you if I come up with | |
1342 | # more. | |
1343 | # [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] | |
1344 | ||
1815bff5 A |
1345 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
1346 | Rule NT_YK 1918 only - Apr 14 2:00 1:00 D | |
1347 | Rule NT_YK 1918 only - Oct 27 2:00 0 S | |
1348 | Rule NT_YK 1919 only - May 25 2:00 1:00 D | |
1349 | Rule NT_YK 1919 only - Nov 1 0:00 0 S | |
2fc1e207 A |
1350 | Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War |
1351 | Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace | |
1815bff5 A |
1352 | Rule NT_YK 1945 only - Sep 30 2:00 0 S |
1353 | Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD | |
1354 | Rule NT_YK 1965 only - Oct lastSun 2:00 0 S | |
1355 | Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D | |
1356 | Rule NT_YK 1980 max - Oct lastSun 2:00 0 S | |
1357 | Rule NT_YK 1987 max - Apr Sun>=1 2:00 1:00 D | |
1358 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
1359 | Zone America/Pangnirtung -4:22:56 - LMT 1884 | |
b51d5b5f A |
1360 | -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 |
1361 | -5:00 Canada E%sT 1999 Oct 31 2:00 | |
1362 | -6:00 Canada C%sT 2000 Oct 29 2:00 | |
1363 | -5:00 Canada E%sT | |
1364 | Zone America/Iqaluit -4:33:52 - LMT 1884 # Frobisher Bay before 1987 | |
1365 | -5:00 NT_YK E%sT 1999 Oct 31 2:00 | |
1366 | -6:00 Canada C%sT 2000 Oct 29 2:00 | |
1367 | -5:00 Canada E%sT | |
1815bff5 | 1368 | Zone America/Rankin_Inlet -6:08:40 - LMT 1884 |
b51d5b5f A |
1369 | -6:00 NT_YK C%sT 2000 Oct 29 2:00 |
1370 | -5:00 - EST 2001 Apr 1 3:00 | |
1371 | -6:00 Canada C%sT | |
1372 | Zone America/Cambridge_Bay -7:00:20 - LMT 1884 | |
1373 | -7:00 NT_YK M%sT 1999 Oct 31 2:00 | |
1374 | -6:00 Canada C%sT 2000 Oct 29 2:00 | |
1375 | -5:00 - EST 2000 Nov 5 0:00 | |
1376 | -6:00 - CST 2001 Apr 1 3:00 | |
1377 | -7:00 Canada M%sT | |
1815bff5 A |
1378 | Zone America/Yellowknife -7:37:24 - LMT 1884 |
1379 | -7:00 NT_YK M%sT | |
1380 | Zone America/Inuvik -8:54:00 - LMT 1884 | |
1381 | -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 | |
1382 | -7:00 NT_YK M%sT | |
1383 | Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 | |
1384 | -9:00 NT_YK Y%sT 1966 Jul 1 2:00 | |
1385 | -8:00 NT_YK P%sT | |
1386 | Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 | |
1387 | -9:00 NT_YK Y%sT 1973 Oct 28 0:00 | |
1388 | -8:00 NT_YK P%sT | |
1389 | ||
1390 | ||
1391 | ############################################################################### | |
1392 | ||
1393 | # Mexico | |
1394 | ||
b51d5b5f A |
1395 | # From Paul Eggert (2001-03-05): |
1396 | # The Investigation and Analysis Service of the | |
1397 | # Mexican Library of Congress (MLoC) has published a | |
1398 | # <a href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/"> | |
1399 | # history of Mexican local time (in Spanish) | |
1400 | # </a>. | |
1815bff5 | 1401 | # |
b51d5b5f A |
1402 | # Here are the discrepancies between Shanks and the MLoC. |
1403 | # (In all cases we go with the MLoC.) | |
1404 | # Shanks reports that Baja was at -8:00 in 1922/1923. | |
1405 | # Shanks says the 1930 transition in Baja was 1930-11-16. | |
1406 | # Shanks reports no DST during summer 1931. | |
1407 | # Shanks reports a transition at 1032-03-30 23:00, not 1932-04-01. | |
1408 | # Shanks does not report transitions for Baja in 1945 or 1948. | |
1409 | # Shanks reports southern Mexico transitions on 1981-12-01, not 12-23. | |
1410 | # Shanks says Quintana Roo switched to -6:00 on 1982-12-02, and to -5:00 | |
1411 | # on 1997-10-26 at 02:00. | |
1412 | ||
1413 | # From Gwillim Law (2001-02-20): | |
1414 | # There are some other discrepancies between the Decrees page and the | |
1415 | # tz database. I think they can best be explained by supposing that | |
1416 | # the researchers who prepared the Decrees page failed to find some of | |
1417 | # the relevant documents. | |
1418 | ||
1419 | # From Paul Eggert (2000-07-26): | |
1420 | # Shanks gives 1942-04-01 instead of 1942-04-24, and omits the 1981 | |
1421 | # and 1988 DST experiments. Go with spin.com.mx. | |
1815bff5 A |
1422 | |
1423 | # From Alan Perry <alan.perry@eng.sun.com> (1996-02-15): | |
1424 | # A guy from our Mexico subsidiary finally found the Presidential Decree | |
1425 | # outlining the timezone changes in Mexico. | |
b51d5b5f | 1426 | # |
1815bff5 | 1427 | # ------------- Begin Forwarded Message ------------- |
b51d5b5f | 1428 | # |
1815bff5 A |
1429 | # I finally got my hands on the Official Presidential Decree that sets up the |
1430 | # rules for the DST changes. The rules are: | |
b51d5b5f | 1431 | # |
1815bff5 A |
1432 | # 1. The country is divided in 3 timezones: |
1433 | # - Baja California Norte (the Mexico/BajaNorte TZ) | |
1434 | # - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) | |
1435 | # - The rest of the country (the Mexico/General TZ) | |
b51d5b5f | 1436 | # |
1815bff5 A |
1437 | # 2. From the first Sunday in April at 2:00 AM to the last Sunday in October |
1438 | # at 2:00 AM, the times in each zone are as follows: | |
1439 | # BajaNorte: GMT+7 | |
1440 | # BajaSur: GMT+6 | |
1441 | # General: GMT+5 | |
b51d5b5f | 1442 | # |
1815bff5 A |
1443 | # 3. The rest of the year, the times are as follows: |
1444 | # BajaNorte: GMT+8 | |
1445 | # BajaSur: GMT+7 | |
1446 | # General: GMT+6 | |
b51d5b5f | 1447 | # |
1815bff5 | 1448 | # The Decree was published in Mexico's Official Newspaper on January 4th. |
b51d5b5f | 1449 | # |
1815bff5 A |
1450 | # -------------- End Forwarded Message -------------- |
1451 | # From Paul Eggert (1996-06-12): | |
b51d5b5f A |
1452 | # For an English translation of the decree, see |
1453 | # <a href="http://mexico-travel.com/extra/timezone_eng.html"> | |
1454 | # ``Diario Oficial: Time Zone Changeover'' (1996-01-04). | |
1455 | # </a> | |
1456 | ||
1457 | # From Rives McDow (1998-10-08): | |
1458 | # The State of Quintana Roo has reverted back to central STD and DST times | |
1459 | # (i.e. UTC -0600 and -0500 as of 1998-08-02). | |
1460 | ||
1461 | # From Rives McDow (2000-01-10): | |
1462 | # Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time | |
1463 | # zone 5 hours from the International Date Line, and will not observe daylight | |
1464 | # savings time so as to stay on the same time zone as the southern part of | |
1465 | # Arizona year round. | |
1466 | ||
1467 | # From Jesper Norgaard, translating | |
1468 | # <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): | |
1469 | # In Oaxaca, the 55.000 teachers from the Section 22 of the National | |
1470 | # Syndicate of Education Workers, refuse to apply daylight saving each | |
1471 | # year, so that the more than 10,000 schools work at normal hour the | |
1472 | # whole year. | |
1473 | ||
1474 | # From Gwillim Law (2001-01-19): | |
1475 | # <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says | |
1476 | # (translated):... | |
1477 | # January 17, 2000 - The Energy Secretary, Ernesto Martens, announced | |
1478 | # that Summer Time will be reduced from seven to five months, starting | |
1479 | # this year.... | |
1480 | # <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001> | |
1481 | # [translated], says "summer time will ... take effect on the first Sunday | |
1482 | # in May, and end on the last Sunday of September. | |
1483 | ||
1484 | # From Arthur David Olson (2001-01-25): | |
1485 | # The 2001-01-24 traditional Washington Post contained the page one | |
1486 | # story "Timely Issue Divides Mexicans."... | |
1487 | # http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html | |
1488 | # ... Mexico City Mayor Lopez Obrador "...is threatening to keep | |
1489 | # Mexico City and its 20 million residents on a different time than | |
1490 | # the rest of the country..." In particular, Lopez Obrador would abolish | |
1491 | # observation of Daylight Saving Time. | |
1492 | ||
1493 | # <a href="http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre"> | |
1494 | # Official statute published by the Energy Department | |
1495 | # </a> (2001-02-01) shows Baja and Chihauhua as still using US DST rules, | |
1496 | # and Sonora with no DST. This was reported by Jesper Norgaard (2001-02-03). | |
1497 | ||
1498 | # From Paul Eggert (2001-03-03): | |
1499 | # | |
1500 | # <a href="http://www.latimes.com/news/nation/20010303/t000018766.html"> | |
1501 | # James F. Smith writes in today's LA Times | |
1502 | # </a> | |
1503 | # * Sonora will continue to observe standard time. | |
1504 | # * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that | |
1505 | # the Federal District will not adopt DST. | |
1506 | # * 4 of 16 district leaders announced they'll ignore the decree. | |
1507 | # * The decree does not affect federal-controlled facilities including | |
1508 | # the airport, banks, hospitals, and schools. | |
1509 | # | |
1510 | # For now we'll assume that the Federal District will bow to federal rules. | |
1511 | ||
1512 | # From Jesper Norgaard (2001-04-01): | |
1513 | # I found some references to the Mexican application of daylight | |
1514 | # saving, which modifies what I had already sent you, stating earlier | |
1515 | # that a number of northern Mexican states would go on daylight | |
1516 | # saving. The modification reverts this to only cover Baja California | |
1517 | # (Norte), while all other states (except Sonora, who has no daylight | |
1518 | # saving all year) will follow the original decree of president | |
1519 | # Vicente Fox, starting daylight saving May 6, 2001 and ending | |
1520 | # September 30, 2001. | |
1521 | # References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp> | |
1522 | # Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) | |
1815bff5 | 1523 | |
c3a08f59 A |
1524 | # From Reuters (2001-09-04): |
1525 | # Mexico's Supreme Court on Tuesday declared that daylight savings was | |
1526 | # unconstitutional in Mexico City, creating the possibility the | |
1527 | # capital will be in a different time zone from the rest of the nation | |
1528 | # next year.... The Supreme Court's ruling takes effect at 2:00 | |
1529 | # a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to | |
1530 | # standard time. "This is so residents of the Federal District are not | |
1531 | # subject to unexpected time changes," a statement from the court said. | |
1532 | ||
1533 | # From Jesper Norgaard Welen (2002-03-12): | |
1534 | # ... consulting my local grocery store(!) and my coworkers, they all insisted | |
1535 | # that a new decision had been made to reinstate US style DST in Mexico.... | |
1536 | # http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) | |
1537 | # confirms this. Sonora as usual is the only state where DST is not applied. | |
1538 | ||
1815bff5 A |
1539 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
1540 | Rule Mexico 1939 only - Feb 5 0:00 1:00 D | |
1541 | Rule Mexico 1939 only - Jun 25 0:00 0 S | |
1542 | Rule Mexico 1940 only - Dec 9 0:00 1:00 D | |
1543 | Rule Mexico 1941 only - Apr 1 0:00 0 S | |
2fc1e207 | 1544 | Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War |
1815bff5 A |
1545 | Rule Mexico 1944 only - May 1 0:00 0 S |
1546 | Rule Mexico 1950 only - Feb 12 0:00 1:00 D | |
1547 | Rule Mexico 1950 only - Jul 30 0:00 0 S | |
b51d5b5f A |
1548 | Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D |
1549 | Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S | |
c3a08f59 A |
1550 | Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D |
1551 | Rule Mexico 2001 only - Sep lastSun 2:00 0 S | |
1552 | Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D | |
1553 | Rule Mexico 2002 max - Oct lastSun 2:00 0 S | |
1815bff5 | 1554 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
b51d5b5f A |
1555 | # Quintana Roo |
1556 | Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 | |
1557 | -6:00 - CST 1981 Dec 23 | |
1558 | -5:00 Mexico E%sT 1998 Aug 2 2:00 | |
1559 | -6:00 Mexico C%sT | |
1560 | # Campeche, Yucatan | |
1561 | Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 | |
1562 | -6:00 - CST 1981 Dec 23 | |
1563 | -5:00 - EST 1982 Dec 2 | |
1564 | -6:00 Mexico C%sT | |
1565 | # Coahuila, Durango, Nuevo Leon, Tamaulipas | |
1566 | Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 | |
1567 | -6:00 - CST 1988 | |
1568 | -6:00 US C%sT 1989 | |
1569 | -6:00 Mexico C%sT | |
1570 | # Central Mexico | |
1815bff5 A |
1571 | Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 |
1572 | -7:00 - MST 1927 Jun 10 23:00 | |
1573 | -6:00 - CST 1930 Nov 15 | |
1574 | -7:00 - MST 1931 May 1 23:00 | |
1575 | -6:00 - CST 1931 Oct | |
b51d5b5f | 1576 | -7:00 - MST 1932 Apr 1 |
c3a08f59 A |
1577 | -6:00 Mexico C%sT 2001 Sep 30 02:00 |
1578 | -6:00 - CST 2002 Feb 20 | |
1815bff5 | 1579 | -6:00 Mexico C%sT |
b51d5b5f A |
1580 | # Chihuahua |
1581 | Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 | |
1582 | -7:00 - MST 1927 Jun 10 23:00 | |
1583 | -6:00 - CST 1930 Nov 15 | |
1584 | -7:00 - MST 1931 May 1 23:00 | |
1585 | -6:00 - CST 1931 Oct | |
1586 | -7:00 - MST 1932 Apr 1 | |
1587 | -6:00 - CST 1996 | |
1588 | -6:00 Mexico C%sT 1998 | |
1589 | -6:00 - CST 1998 Apr Sun>=1 3:00 | |
1590 | -7:00 Mexico M%sT | |
1591 | # Sonora | |
1592 | Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 | |
1593 | -7:00 - MST 1927 Jun 10 23:00 | |
1594 | -6:00 - CST 1930 Nov 15 | |
1595 | -7:00 - MST 1931 May 1 23:00 | |
1596 | -6:00 - CST 1931 Oct | |
1597 | -7:00 - MST 1932 Apr 1 | |
1598 | -6:00 - CST 1942 Apr 24 | |
1599 | -7:00 - MST 1949 Jan 14 | |
1600 | -8:00 - PST 1970 | |
1601 | -7:00 Mexico M%sT 1999 | |
1602 | -7:00 - MST | |
1603 | # Baja California Sur, Nayarit, Sinaloa | |
1815bff5 A |
1604 | Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 |
1605 | -7:00 - MST 1927 Jun 10 23:00 | |
1606 | -6:00 - CST 1930 Nov 15 | |
1607 | -7:00 - MST 1931 May 1 23:00 | |
1608 | -6:00 - CST 1931 Oct | |
b51d5b5f A |
1609 | -7:00 - MST 1932 Apr 1 |
1610 | -6:00 - CST 1942 Apr 24 | |
1815bff5 A |
1611 | -7:00 - MST 1949 Jan 14 |
1612 | -8:00 - PST 1970 | |
1613 | -7:00 Mexico M%sT | |
b51d5b5f | 1614 | # Baja California |
1815bff5 | 1615 | Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 |
b51d5b5f | 1616 | -7:00 - MST 1924 |
1815bff5 | 1617 | -8:00 - PST 1927 Jun 10 23:00 |
b51d5b5f A |
1618 | -7:00 - MST 1930 Nov 15 |
1619 | -8:00 - PST 1931 Apr 1 | |
1620 | -8:00 1:00 PDT 1931 Sep 30 | |
1621 | -8:00 - PST 1942 Apr 24 | |
1622 | -8:00 1:00 PWT 1945 Nov 12 | |
1623 | -8:00 - PST 1948 Apr 5 | |
1624 | -8:00 1:00 PDT 1949 Jan 14 | |
1625 | -8:00 - PST 1954 | |
1626 | -8:00 CA P%sT 1961 | |
1627 | -8:00 - PST 1976 | |
1815bff5 | 1628 | -8:00 US P%sT 1996 |
b51d5b5f | 1629 | -8:00 Mexico P%sT 2001 |
c3a08f59 A |
1630 | -8:00 US P%sT 2002 Feb 20 |
1631 | -8:00 Mexico P%sT | |
b51d5b5f A |
1632 | # From Paul Eggert (2001-03-05): |
1633 | # Formerly there was an America/Ensenada zone, which differed from | |
1634 | # America/Tijuana only in that it did not observe DST from 1976 | |
1635 | # through 1995. This was as per Shanks. However, Guy Harris reports | |
1636 | # that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and | |
1637 | # Tijuana observe DST," which contradicts Shanks but does imply that | |
1638 | # DST-observance was a town-by-town matter back then. This concerns | |
1639 | # data after 1970 so most likely there should be at least one Zone | |
1640 | # other than America/Tijuana for Baja, but it's not clear yet what its | |
1641 | # name or contents should be. | |
1815bff5 A |
1642 | # |
1643 | # Revillagigedo Is | |
1644 | # no information | |
1645 | ||
1646 | ############################################################################### | |
1647 | ||
1648 | # Anguilla | |
1649 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
1650 | Zone America/Anguilla -4:12:16 - LMT 1912 Mar 2 | |
1651 | -4:00 - AST | |
1652 | ||
1653 | # Antigua and Barbuda | |
1654 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
1655 | Zone America/Antigua -4:07:12 - LMT 1912 Mar 2 | |
1656 | -5:00 - EST 1951 | |
1657 | -4:00 - AST | |
1658 | ||
1659 | # Bahamas | |
1660 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
1661 | Rule Bahamas 1964 max - Oct lastSun 2:00 0 S | |
1662 | Rule Bahamas 1964 1986 - Apr lastSun 2:00 1:00 D | |
1663 | Rule Bahamas 1987 max - Apr Sun>=1 2:00 1:00 D | |
1664 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
1665 | Zone America/Nassau -5:09:24 - LMT 1912 Mar 2 | |
1666 | -5:00 Bahamas E%sT | |
1667 | ||
1668 | # Barbados | |
1669 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
1670 | Rule Barb 1977 only - Jun 12 2:00 1:00 D | |
1671 | Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S | |
1672 | Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D | |
1673 | Rule Barb 1979 only - Sep 30 2:00 0 S | |
1674 | Rule Barb 1980 only - Sep 25 2:00 0 S | |
1675 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
1676 | Zone America/Barbados -3:58:28 - LMT 1924 # Bridgetown | |
b51d5b5f | 1677 | -3:58:28 - BMT 1932 # Bridgetown Mean Time |
1815bff5 A |
1678 | -4:00 Barb A%sT |
1679 | ||
1680 | # Belize | |
1681 | # Whitman entirely disagrees with Shanks; go with Shanks. | |
1682 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
1683 | Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD | |
1684 | Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S | |
1685 | Rule Belize 1973 only - Dec 5 0:00 1:00 D | |
1686 | Rule Belize 1974 only - Feb 9 0:00 0 S | |
1687 | Rule Belize 1982 only - Dec 18 0:00 1:00 D | |
1688 | Rule Belize 1983 only - Feb 12 0:00 0 S | |
1689 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
1690 | Zone America/Belize -5:52:48 - LMT 1912 Apr | |
1691 | -6:00 Belize C%sT | |
1692 | ||
1693 | # Bermuda | |
1694 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
1695 | Zone Atlantic/Bermuda -4:19:04 - LMT 1930 Jan 1 2:00 # Hamilton | |
1696 | -4:00 - AST 1974 Apr 28 2:00 | |
1697 | -4:00 Bahamas A%sT | |
1698 | ||
1699 | # Cayman Is | |
1700 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
1701 | Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown | |
b51d5b5f | 1702 | -5:07:12 - KMT 1912 Feb # Kingston Mean Time |
1815bff5 A |
1703 | -5:00 - EST |
1704 | ||
1815bff5 | 1705 | # Costa Rica |
1815bff5 A |
1706 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
1707 | Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D | |
1708 | Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S | |
1709 | Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D | |
1710 | # IATA SSIM (1991-09) says the following was at 1:00; go with Shanks. | |
1711 | Rule CR 1991 only - Jul 1 0:00 0 S | |
1712 | Rule CR 1992 only - Mar 15 0:00 0 S | |
1713 | # There are too many San Joses elsewhere, so we'll use `Costa Rica'. | |
1714 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
1715 | Zone America/Costa_Rica -5:36:20 - LMT 1890 # San Jose | |
b51d5b5f | 1716 | -5:36:20 - SJMT 1921 Jan 15 # San Jose Mean Time |
1815bff5 A |
1717 | -6:00 CR C%sT |
1718 | # Coco | |
1719 | # no information; probably like America/Costa_Rica | |
1720 | ||
1721 | # Cuba | |
1722 | ||
b51d5b5f A |
1723 | # From Arthur David Olson (1999-03-29): |
1724 | # The 1999-03-28 exhibition baseball game held in Havana, Cuba, between | |
1725 | # the Cuban National Team and the Baltimore Orioles was carried live on | |
1726 | # the Orioles Radio Network, including affiliate WTOP in Washington, DC. | |
1727 | # During the game, play-by-play announcer Jim Hunter noted that | |
1728 | # "We'll be losing two hours of sleep...Cuba switched to Daylight Saving | |
1729 | # Time today." (The "two hour" remark referred to losing one hour of | |
1730 | # sleep on 1999-03-28--when the announcers were in Cuba as it switched | |
1731 | # to DST--and one more hour on 1999-04-04--when the announcers will have | |
1732 | # returned to Baltimore, which switches on that date.) | |
1815bff5 | 1733 | |
1815bff5 A |
1734 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
1735 | Rule Cuba 1928 only - Jun 10 0:00 1:00 D | |
1736 | Rule Cuba 1928 only - Oct 10 0:00 0 S | |
1737 | Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D | |
1738 | Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S | |
1739 | Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D | |
1740 | Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S | |
1741 | Rule Cuba 1965 only - Jun 1 0:00 1:00 D | |
1742 | Rule Cuba 1965 only - Sep 30 0:00 0 S | |
1743 | Rule Cuba 1966 only - May 29 0:00 1:00 D | |
1744 | Rule Cuba 1966 only - Oct 2 0:00 0 S | |
1745 | Rule Cuba 1967 only - Apr 8 0:00 1:00 D | |
1746 | Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S | |
1747 | Rule Cuba 1968 only - Apr 14 0:00 1:00 D | |
1748 | Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D | |
1749 | Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S | |
1750 | Rule Cuba 1972 1974 - Oct 8 0:00 0 S | |
1751 | Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S | |
1752 | Rule Cuba 1978 only - May 7 0:00 1:00 D | |
b51d5b5f | 1753 | Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S |
1815bff5 A |
1754 | Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D |
1755 | Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D | |
1815bff5 | 1756 | Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D |
b51d5b5f | 1757 | Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D |
1815bff5 | 1758 | Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S |
b51d5b5f A |
1759 | Rule Cuba 1996 only - Oct 6 0:00s 0 S |
1760 | Rule Cuba 1997 only - Oct 12 0:00s 0 S | |
1761 | Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D | |
1762 | Rule Cuba 1998 max - Oct lastSun 0:00s 0 S | |
1763 | Rule Cuba 2000 max - Apr Sun>=1 0:00s 1:00 D | |
1815bff5 A |
1764 | |
1765 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
1766 | Zone America/Havana -5:29:28 - LMT 1890 | |
b51d5b5f | 1767 | -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT |
1815bff5 A |
1768 | -5:00 Cuba C%sT |
1769 | ||
1770 | # Dominica | |
1771 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
1772 | Zone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau | |
1773 | -4:00 - AST | |
1774 | ||
1775 | # Dominican Republic | |
b51d5b5f A |
1776 | |
1777 | # From Steffen Thorsen (2000-10-30): | |
1778 | # Enrique Morales reported to me that the Dominican Republic has changed the | |
1779 | # time zone to Eastern Standard Time as of Sunday 29 at 2 am.... | |
1780 | # http://www.listin.com.do/antes/261000/republica/princi.html | |
1781 | ||
1782 | # From Paul Eggert (2000-12-04): | |
1783 | # That URL (2000-10-26, in Spanish) says they planned to use US-style DST. | |
1784 | ||
1785 | # From Rives McDow (2000-12-01): | |
1786 | # Dominican Republic changed its mind and presidential decree on Tuesday, | |
1787 | # November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the | |
1788 | # Dominican Republic will be reverting to 8 hours from the International Date | |
1789 | # Line, and will not be using DST in the foreseeable future. The reason they | |
1790 | # decided to use DST was to be in synch with Puerto Rico, who was also going | |
1791 | # to implement DST. When Puerto Rico didn't implement DST, the president | |
1792 | # decided to revert. | |
1793 | ||
1794 | ||
1815bff5 A |
1795 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
1796 | Rule DR 1966 only - Oct 30 0:00 1:00 D | |
1797 | Rule DR 1967 only - Feb 28 0:00 0 S | |
1798 | Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD | |
1799 | Rule DR 1970 only - Feb 21 0:00 0 S | |
1800 | Rule DR 1971 only - Jan 20 0:00 0 S | |
1801 | Rule DR 1972 1974 - Jan 21 0:00 0 S | |
1802 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
1803 | Zone America/Santo_Domingo -4:39:36 - LMT 1890 | |
1804 | -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT | |
1805 | -5:00 DR E%sT 1974 Oct 27 | |
b51d5b5f A |
1806 | -4:00 - AST 2000 Oct 29 02:00 |
1807 | -5:00 US E%sT 2000 Dec 3 01:00 | |
1815bff5 A |
1808 | -4:00 - AST |
1809 | ||
1810 | # El Salvador | |
1811 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
1812 | Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D | |
1813 | Rule Salv 1987 1988 - Sep lastSun 0:00 0 S | |
2fc1e207 A |
1814 | # There are too many San Salvadors elsewhere, so use America/El_Salvador |
1815 | # instead of America/San_Salvador. | |
1815bff5 A |
1816 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
1817 | Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador | |
1818 | -6:00 Salv C%sT | |
1819 | ||
1820 | # Grenada | |
1821 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
1822 | Zone America/Grenada -4:07:00 - LMT 1911 Jul # St George's | |
1823 | -4:00 - AST | |
1824 | ||
1825 | # Guadeloupe | |
1826 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
1827 | Zone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe a Pitre | |
1828 | -4:00 - AST | |
1829 | ||
1830 | # Guatemala | |
1831 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
1832 | Rule Guat 1973 only - Nov 25 0:00 1:00 D | |
1833 | Rule Guat 1974 only - Feb 24 0:00 0 S | |
1834 | Rule Guat 1983 only - May 21 0:00 1:00 D | |
1835 | Rule Guat 1983 only - Sep 22 0:00 0 S | |
1836 | Rule Guat 1991 only - Mar 23 0:00 1:00 D | |
1837 | Rule Guat 1991 only - Sep 7 0:00 0 S | |
1838 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
1839 | Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5 | |
1840 | -6:00 Guat C%sT | |
1841 | ||
1842 | # Haiti | |
1843 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
1844 | Rule Haiti 1983 only - May 8 0:00 1:00 D | |
1845 | Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D | |
1846 | Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S | |
b51d5b5f A |
1847 | # Shanks says AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. Go with IATA. |
1848 | Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D | |
1849 | Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S | |
1815bff5 A |
1850 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
1851 | Zone America/Port-au-Prince -4:49:20 - LMT 1890 | |
1852 | -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT | |
1853 | -5:00 Haiti E%sT | |
1854 | ||
1855 | # Honduras | |
1856 | # Shanks says 1921 Jan 1; go with Whitman's more precise Apr 1. | |
1857 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
1858 | Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr | |
1859 | -6:00 Salv C%sT | |
b51d5b5f A |
1860 | # |
1861 | # Great Swan I ceded by US to Honduras in 1972 | |
1815bff5 A |
1862 | |
1863 | # Jamaica | |
1864 | ||
1865 | # From Bob Devine (1988-01-28): | |
1866 | # Follows US rules. | |
1867 | ||
1868 | # From U. S. Naval Observatory (1989-01-19): | |
1869 | # JAMAICA 5 H BEHIND UTC | |
1870 | ||
b51d5b5f | 1871 | # From Shanks: |
1815bff5 A |
1872 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
1873 | Zone America/Jamaica -5:07:12 - LMT 1890 # Kingston | |
b51d5b5f A |
1874 | -5:07:12 - KMT 1912 Feb # Kingston Mean Time |
1875 | -5:00 - EST 1974 Apr 28 2:00 | |
1815bff5 A |
1876 | -5:00 US E%sT 1984 |
1877 | -5:00 - EST | |
1878 | ||
1879 | # Martinique | |
1880 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
1881 | Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France | |
c3a08f59 | 1882 | -4:04:20 - FFMT 1911 May # Fort-de-France MT |
1815bff5 A |
1883 | -4:00 - AST 1980 Apr 6 |
1884 | -4:00 1:00 ADT 1980 Sep 28 | |
1885 | -4:00 - AST | |
1886 | ||
1887 | # Montserrat | |
b51d5b5f A |
1888 | # From Paul Eggert (1997-08-31): |
1889 | # Recent volcanic eruptions have forced evacuation of Plymouth, the capital. | |
1890 | # Luckily, Olveston, the current de facto capital, has the same longitude. | |
1815bff5 | 1891 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] |
b51d5b5f | 1892 | Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Olveston |
1815bff5 A |
1893 | -4:00 - AST |
1894 | ||
1895 | # Nicaragua | |
b51d5b5f A |
1896 | # |
1897 | # From Steffen Thorsen (1998-12-29): | |
1898 | # Nicaragua seems to be back at -6:00 but I have not been able to find when | |
1899 | # they changed from -5:00. | |
1900 | # | |
1815bff5 A |
1901 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
1902 | Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D | |
1903 | Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S | |
1904 | Rule Nic 1992 only - Jan 1 4:00 1:00 D | |
1905 | Rule Nic 1992 only - Sep 24 0:00 0 S | |
1906 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
1907 | Zone America/Managua -5:45:08 - LMT 1890 | |
c3a08f59 | 1908 | -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? |
1815bff5 A |
1909 | -6:00 - CST 1973 May |
1910 | -5:00 - EST 1975 Feb 16 | |
1911 | -6:00 Nic C%sT 1993 Jan 1 4:00 | |
b51d5b5f A |
1912 | -5:00 - EST 1998 Dec |
1913 | -6:00 - CST | |
1815bff5 A |
1914 | |
1915 | # Panama | |
1916 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
1917 | Zone America/Panama -5:18:08 - LMT 1890 | |
c3a08f59 | 1918 | -5:19:36 - CMT 1908 Apr 22 # Colon Mean Time |
1815bff5 A |
1919 | -5:00 - EST |
1920 | ||
1921 | # Puerto Rico | |
1922 | # There are too many San Juans elsewhere, so we'll use `Puerto_Rico'. | |
1923 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
1924 | Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan | |
1925 | -4:00 - AST 1942 May 3 | |
1926 | -4:00 1:00 AWT 1945 Sep 30 2:00 | |
1927 | -4:00 - AST | |
1928 | ||
1929 | # St Kitts-Nevis | |
1930 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
1931 | Zone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre | |
1932 | -4:00 - AST | |
1933 | ||
1934 | # St Lucia | |
1935 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
1936 | Zone America/St_Lucia -4:04:00 - LMT 1890 # Castries | |
c3a08f59 | 1937 | -4:04:00 - CMT 1912 # Castries Mean Time |
1815bff5 A |
1938 | -4:00 - AST |
1939 | ||
1940 | # St Pierre and Miquelon | |
1941 | # There are too many St Pierres elsewhere, so we'll use `Miquelon'. | |
1942 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
1943 | Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre | |
1944 | -4:00 - AST 1980 May | |
2fc1e207 A |
1945 | -3:00 - PMST 1987 # Pierre & Miquelon Time |
1946 | -3:00 Canada PM%sT | |
1815bff5 A |
1947 | |
1948 | # St Vincent and the Grenadines | |
1949 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
1950 | Zone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown | |
b51d5b5f | 1951 | -4:04:56 - KMT 1912 # Kingstown Mean Time |
1815bff5 A |
1952 | -4:00 - AST |
1953 | ||
1954 | # Turks and Caicos | |
b51d5b5f A |
1955 | # From Paul Eggert (1998-08-06): |
1956 | # Shanks says they use US DST rules, but IATA SSIM (1991/1998) | |
1815bff5 A |
1957 | # says they switch at midnight. Go with IATA SSIM. |
1958 | # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
1959 | Rule TC 1979 1986 - Apr lastSun 0:00 1:00 D | |
1960 | Rule TC 1979 max - Oct lastSun 0:00 0 S | |
1961 | Rule TC 1987 max - Apr Sun>=1 0:00 1:00 D | |
1962 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
1963 | Zone America/Grand_Turk -4:44:32 - LMT 1890 | |
b51d5b5f | 1964 | -5:07:12 - KMT 1912 Feb # Kingston Mean Time |
1815bff5 A |
1965 | -5:00 TC E%sT |
1966 | ||
1967 | # British Virgin Is | |
1968 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
1969 | Zone America/Tortola -4:18:28 - LMT 1911 Jul # Road Town | |
1970 | -4:00 - AST | |
1971 | ||
1972 | # Virgin Is | |
1973 | # Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
1974 | Zone America/St_Thomas -4:19:44 - LMT 1911 Jul # Charlotte Amalie | |
1975 | -4:00 - AST |