1 #
2 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
3 #
4 # This code is free software; you can redistribute it and/or modify it
5 # under the terms of the GNU General Public License version 2 only, as
6 # published by the Free Software Foundation. Oracle designates this
7 # particular file as subject to the "Classpath" exception as provided
8 # by Oracle in the LICENSE file that accompanied this code.
9 #
10 # This code is distributed in the hope that it will be useful, but WITHOUT
11 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 # version 2 for more details (a copy is included in the LICENSE file that
14 # accompanied this code).
15 #
16 # You should have received a copy of the GNU General Public License version
17 # 2 along with this work; if not, write to the Free Software Foundation,
18 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 #
20 # Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 # or visit www.oracle.com if you need additional information or have any
22 # questions.
23 #
24 # This file is in the public domain, so clarified as of
25 # 2009-05-17 by Arthur David Olson.
26
27 # This file is by no means authoritative; if you think you know better,
28 # go ahead and edit the file (and please send any changes to
29 # tz@iana.org for general use in the future). For more, please see
30 # the file CONTRIBUTING in the tz distribution.
31
32 # From Paul Eggert (2014-10-31):
33 #
34 # Unless otherwise specified, the source for data through 1990 is:
35 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
36 # San Diego: ACS Publications, Inc. (2003).
37 # Unfortunately this book contains many errors and cites no sources.
38 #
39 # Gwillim Law writes that a good source
40 # for recent time zone data is the International Air Transport
41 # Association's Standard Schedules Information Manual (IATA SSIM),
42 # published semiannually. Law sent in several helpful summaries
43 # of the IATA's data after 1990. Except where otherwise noted,
44 # IATA SSIM is the source for entries after 1990.
45 #
46 # For data circa 1899, a common source is:
47 # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94.
48 # http://www.jstor.org/stable/1774359
49 #
50 # Earlier editions of these tables used the North American style (e.g. ARST and
51 # ARDT for Argentine Standard and Daylight Time), but the following quote
52 # suggests that it's better to use European style (e.g. ART and ARST).
53 # I suggest the use of _Summer time_ instead of the more cumbersome
54 # _daylight-saving time_. _Summer time_ seems to be in general use
55 # in Europe and South America.
56 # -- E O Cutler, _New York Times_ (1937-02-14), quoted in
57 # H L Mencken, _The American Language: Supplement I_ (1960), p 466
58 #
59 # Earlier editions of these tables also used the North American style
60 # for time zones in Brazil, but this was incorrect, as Brazilians say
61 # "summer time". Reinaldo Goulart, a São Paulo businessman active in
62 # the railroad sector, writes (1999-07-06):
63 # The subject of time zones is currently a matter of discussion/debate in
64 # Brazil. Let's say that "the Brasília time" is considered the
65 # "official time" because Brasília is the capital city.
66 # The other three time zones are called "Brasília time "minus one" or
67 # "plus one" or "plus two". As far as I know there is no such
68 # name/designation as "Eastern Time" or "Central Time".
69 # So I invented the following (English-language) abbreviations for now.
70 # Corrections are welcome!
71 # std dst
72 # -2:00 FNT FNST Fernando de Noronha
73 # -3:00 BRT BRST Brasília
74 # -4:00 AMT AMST Amazon
75 # -5:00 ACT ACST Acre
76
77 ###############################################################################
78
79 ###############################################################################
80
81 # Argentina
82
83 # From Bob Devine (1988-01-28):
84 # Argentina: first Sunday in October to first Sunday in April since 1976.
85 # Double Summer time from 1969 to 1974. Switches at midnight.
86
87 # From U. S. Naval Observatory (1988-01-19):
88 # ARGENTINA 3 H BEHIND UTC
89
90 # From Hernan G. Otero (1995-06-26):
91 # I am sending modifications to the Argentine time zone table...
92 # AR was chosen because they are the ISO letters that represent Argentina.
93
94 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
95 Rule Arg 1930 only - Dec 1 0:00 1:00 S
96 Rule Arg 1931 only - Apr 1 0:00 0 -
97 Rule Arg 1931 only - Oct 15 0:00 1:00 S
98 Rule Arg 1932 1940 - Mar 1 0:00 0 -
99 Rule Arg 1932 1939 - Nov 1 0:00 1:00 S
100 Rule Arg 1940 only - Jul 1 0:00 1:00 S
101 Rule Arg 1941 only - Jun 15 0:00 0 -
102 Rule Arg 1941 only - Oct 15 0:00 1:00 S
103 Rule Arg 1943 only - Aug 1 0:00 0 -
104 Rule Arg 1943 only - Oct 15 0:00 1:00 S
105 Rule Arg 1946 only - Mar 1 0:00 0 -
106 Rule Arg 1946 only - Oct 1 0:00 1:00 S
107 Rule Arg 1963 only - Oct 1 0:00 0 -
108 Rule Arg 1963 only - Dec 15 0:00 1:00 S
109 Rule Arg 1964 1966 - Mar 1 0:00 0 -
110 Rule Arg 1964 1966 - Oct 15 0:00 1:00 S
111 Rule Arg 1967 only - Apr 2 0:00 0 -
112 Rule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 S
113 Rule Arg 1968 1969 - Apr Sun>=1 0:00 0 -
114 Rule Arg 1974 only - Jan 23 0:00 1:00 S
115 Rule Arg 1974 only - May 1 0:00 0 -
116 Rule Arg 1988 only - Dec 1 0:00 1:00 S
117 #
118 # From Hernan G. Otero (1995-06-26):
119 # These corrections were contributed by InterSoft Argentina S.A.,
120 # obtaining the data from the:
121 # Talleres de Hidrografía Naval Argentina
122 # (Argentine Naval Hydrography Institute)
123 Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 -
124 Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S
125 #
126 # From Hernan G. Otero (1995-06-26):
127 # From this moment on, the law that mandated the daylight saving
128 # time corrections was derogated and no more modifications
129 # to the time zones (for daylight saving) are now made.
130 #
131 # From Rives McDow (2000-01-10):
132 # On October 3, 1999, 0:00 local, Argentina implemented daylight savings time,
133 # which did not result in the switch of a time zone, as they stayed 9 hours
134 # from the International Date Line.
135 Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 S
136 # From Paul Eggert (2007-12-28):
137 # DST was set to expire on March 5, not March 3, but since it was converted
138 # to standard time on March 3 it's more convenient for us to pretend that
139 # it ended on March 3.
140 Rule Arg 2000 only - Mar 3 0:00 0 -
141 #
142 # From Peter Gradelski via Steffen Thorsen (2000-03-01):
143 # We just checked with our São Paulo office and they say the government of
144 # Argentina decided not to become one of the countries that go on or off DST.
145 # So Buenos Aires should be -3 hours from GMT at all times.
146 #
147 # From Fabián L. Arce Jofré (2000-04-04):
148 # The law that claimed DST for Argentina was derogated by President Fernando
149 # de la Rúa on March 2, 2000, because it would make people spend more energy
150 # in the winter time, rather than less. The change took effect on March 3.
151 #
152 # From Mariano Absatz (2001-06-06):
153 # one of the major newspapers here in Argentina said that the 1999
154 # Timezone Law (which never was effectively applied) will (would?) be
155 # in effect.... The article is at
156 # http://ar.clarin.com/diario/2001-06-06/e-01701.htm
157 # ... The Law itself is "Ley No 25155", sanctioned on 1999-08-25, enacted
158 # 1999-09-17, and published 1999-09-21. The official publication is at:
159 # http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF
160 # Regretfully, you have to subscribe (and pay) for the on-line version....
161 #
162 # (2001-06-12):
163 # the timezone for Argentina will not change next Sunday.
164 # Apparently it will do so on Sunday 24th....
165 # http://ar.clarin.com/diario/2001-06-12/s-03501.htm
166 #
167 # (2001-06-25):
168 # Last Friday (yes, the last working day before the date of the change), the
169 # Senate annulled the 1999 law that introduced the changes later postponed.
170 # http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm
171 # It remains the vote of the Deputies..., but it will be the same....
172 # This kind of things had always been done this way in Argentina.
173 # We are still -03:00 all year round in all of the country.
174 #
175 # From Steffen Thorsen (2007-12-21):
176 # A user (Leonardo Chaim) reported that Argentina will adopt DST....
177 # all of the country (all Zone-entries) are affected. News reports like
178 # http://www.lanacion.com.ar/opinion/nota.asp?nota_id=973037 indicate
179 # that Argentina will use DST next year as well, from October to
180 # March, although exact rules are not given.
181 #
182 # From Jesper Nørgaard Welen (2007-12-26)
183 # The last hurdle of Argentina DST is over, the proposal was approved in
184 # the lower chamber too (Diputados) with a vote 192 for and 2 against.
185 # By the way thanks to Mariano Absatz and Daniel Mario Vega for the link to
186 # the original scanned proposal, where the dates and the zero hours are
187 # clear and unambiguous...This is the article about final approval:
188 # http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996
189 #
190 # From Paul Eggert (2007-12-22):
191 # For dates after mid-2008, the following rules are my guesses and
192 # are quite possibly wrong, but are more likely than no DST at all.
193
194 # From Alexander Krivenyshev (2008-09-05):
195 # As per message from Carlos Alberto Fonseca Arauz (Nicaragua),
196 # Argentina will start DST on Sunday October 19, 2008.
197 #
198 # http://www.worldtimezone.com/dst_news/dst_news_argentina03.html
199 # http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish)
200
201 # From Rodrigo Severo (2008-10-06):
202 # Here is some info available at a Gentoo bug related to TZ on Argentina's DST:
203 # ...
204 # ------- Comment #1 from [jmdocile] 2008-10-06 16:28 0000 -------
205 # Hi, there is a problem with timezone-data-2008e and maybe with
206 # timezone-data-2008f
207 # Argentinian law [Number] 25.155 is no longer valid.
208 # http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm
209 # The new one is law [Number] 26.350
210 # http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm
211 # So there is no summer time in Argentina for now.
212
213 # From Mariano Absatz (2008-10-20):
214 # Decree 1693/2008 applies Law 26.350 for the summer 2008/2009 establishing DST
215 # in Argentina from 2008-10-19 until 2009-03-15.
216 # http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01
217 #
218
219 # Decree 1705/2008 excepting 12 Provinces from applying DST in the summer
220 # 2008/2009: Catamarca, La Rioja, Mendoza, Salta, San Juan, San Luis, La
221 # Pampa, Neuquén, Rio Negro, Chubut, Santa Cruz and Tierra del Fuego
222 # http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01
223 #
224 # Press release 235 dated Saturday October 18th, from the Government of the
225 # Province of Jujuy saying it will not apply DST either (even when it was not
226 # included in Decree 1705/2008).
227 # http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc
228
229 # From fullinet (2009-10-18):
230 # As announced in
231 # http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356
232 # (an official .gob.ar) under title: "Sin Cambio de Hora"
233 # (English: "No hour change").
234 #
235 # "Por el momento, el Gobierno Nacional resolvió no modificar la hora
236 # oficial, decisión que estaba en estudio para su implementación el
237 # domingo 18 de octubre. Desde el Ministerio de Planificación se anunció
238 # que la Argentina hoy, en estas condiciones meteorológicas, no necesita
239 # la modificación del huso horario, ya que 2009 nos encuentra con
240 # crecimiento en la producción y distribución energética."
241
242 Rule Arg 2007 only - Dec 30 0:00 1:00 S
243 Rule Arg 2008 2009 - Mar Sun>=15 0:00 0 -
244 Rule Arg 2008 only - Oct Sun>=15 0:00 1:00 S
245
246 # From Mariano Absatz (2004-05-21):
247 # Today it was officially published that the Province of Mendoza is changing
248 # its timezone this winter... starting tomorrow night....
249 # http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf
250 # From Paul Eggert (2004-05-24):
251 # It's Law No. 7,210. This change is due to a public power emergency, so for
252 # now we'll assume it's for this year only.
253 #
254 # From Paul Eggert (2014-08-09):
255 # Hora de verano para la República Argentina
256 # http://buenasiembra.com.ar/esoterismo/astrologia/hora-de-verano-de-la-republica-argentina-27.html
257 # says that standard time in Argentina from 1894-10-31
258 # to 1920-05-01 was -4:16:48.25. Go with this more-precise value
259 # over Shanks & Pottenger.
260 #
261 # From Mariano Absatz (2004-06-05):
262 # These media articles from a major newspaper mostly cover the current state:
263 # http://www.lanacion.com.ar/04/05/27/de_604825.asp
264 # http://www.lanacion.com.ar/04/05/28/de_605203.asp
265 #
266 # The following eight (8) provinces pulled clocks back to UTC-04:00 at
267 # midnight Monday May 31st. (that is, the night between 05/31 and 06/01).
268 # Apparently, all nine provinces would go back to UTC-03:00 at the same
269 # time in October 17th.
270 #
271 # Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz,
272 # Tierra del Fuego, Tucumán.
273 #
274 # From Mariano Absatz (2004-06-14):
275 # ... this weekend, the Province of Tucumán decided it'd go back to UTC-03:00
276 # yesterday midnight (that is, at 24:00 Saturday 12th), since the people's
277 # annoyance with the change is much higher than the power savings obtained....
278 #
279 # From Gwillim Law (2004-06-14):
280 # http://www.lanacion.com.ar/04/06/10/de_609078.asp ...
281 # "The time change in Tierra del Fuego was a conflicted decision from
282 # the start. The government had decreed that the measure would take
283 # effect on June 1, but a normative error forced the new time to begin
284 # three days earlier, from a Saturday to a Sunday....
285 # Our understanding was that the change was originally scheduled to take place
286 # on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other
287 # provinces). Sunday was May 30, only two days earlier. So the article
288 # contains a contradiction. I would give more credence to the Saturday/Sunday
289 # date than the "three days earlier" phrase, and conclude that Tierra del
290 # Fuego set its clocks back at 2004-05-30 00:00.
291 #
292 # From Steffen Thorsen (2004-10-05):
293 # The previous law 7210 which changed the province of Mendoza's time zone
294 # back in May have been modified slightly in a new law 7277, which set the
295 # new end date to 2004-09-26 (original date was 2004-10-17).
296 # http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf
297 #
298 # From Mariano Absatz (2004-10-05):
299 # San Juan changed from UTC-03:00 to UTC-04:00 at midnight between
300 # Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00
301 # at midnight between Saturday, July 24th and Sunday, July 25th....
302 # http://www.sanjuan.gov.ar/prensa/archivo/000329.html
303 # http://www.sanjuan.gov.ar/prensa/archivo/000426.html
304 # http://www.sanjuan.gov.ar/prensa/archivo/000441.html
305
306 # From Alex Krivenyshev (2008-01-17):
307 # Here are articles that Argentina Province San Luis is planning to end DST
308 # as earlier as upcoming Monday January 21, 2008 or February 2008:
309 #
310 # Provincia argentina retrasa reloj y marca diferencia con resto del país
311 # (Argentine Province delayed clock and mark difference with the rest of the
312 # country)
313 # http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel
314 #
315 # Es inminente que en San Luis atrasen una hora los relojes
316 # (It is imminent in San Luis clocks one hour delay)
317 # http://www.lagaceta.com.ar/nota/253414/Economia/Es-inminente-que-en-San-Luis-atrasen-una-hora-los-relojes.html
318 # http://www.worldtimezone.net/dst_news/dst_news_argentina02.html
319
320 # From Jesper Nørgaard Welen (2008-01-18):
321 # The page of the San Luis provincial government
322 # http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812
323 # confirms what Alex Krivenyshev has earlier sent to the tz
324 # emailing list about that San Luis plans to return to standard
325 # time much earlier than the rest of the country. It also
326 # confirms that upon request the provinces San Juan and Mendoza
327 # refused to follow San Luis in this change.
328 #
329 # The change is supposed to take place Monday the 21st at 0:00
330 # hours. As far as I understand it if this goes ahead, we need
331 # a new timezone for San Luis (although there are also documented
332 # independent changes in the southamerica file of San Luis in
333 # 1990 and 1991 which has not been confirmed).
334
335 # From Jesper Nørgaard Welen (2008-01-25):
336 # Unfortunately the below page has become defunct, about the San Luis
337 # time change. Perhaps because it now is part of a group of pages "Most
338 # important pages of 2008."
339 #
340 # You can use
341 # http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834
342 # instead it seems. Or use "Buscador" from the main page of the San Luis
343 # government, and fill in "huso" and click OK, and you will get 3 pages
344 # from which the first one is identical to the above.
345
346 # From Mariano Absatz (2008-01-28):
347 # I can confirm that the Province of San Luis (and so far only that
348 # province) decided to go back to UTC-3 effective midnight Jan 20th 2008
349 # (that is, Monday 21st at 0:00 is the time the clocks were delayed back
350 # 1 hour), and they intend to keep UTC-3 as their timezone all year round
351 # (that is, unless they change their mind any minute now).
352 #
353 # So we'll have to add yet another city to 'southamerica' (I think San
354 # Luis city is the mos populated city in the Province, so it'd be
355 # America/Argentina/San_Luis... of course I can't remember if San Luis's
356 # history of particular changes goes along with Mendoza or San Juan :-(
357 # (I only remember not being able to collect hard facts about San Luis
358 # back in 2004, when these provinces changed to UTC-4 for a few days, I
359 # mailed them personally and never got an answer).
360
361 # From Paul Eggert (2014-08-12):
362 # Unless otherwise specified, data entries are from Shanks & Pottenger through
363 # 1992, from the IATA otherwise. As noted below, Shanks & Pottenger say that
364 # America/Cordoba split into 6 subregions during 1991/1992, one of which
365 # was America/San_Luis, but we haven't verified this yet so for now we'll
366 # keep America/Cordoba a single region rather than splitting it into the
367 # other 5 subregions.
368
369 # From Mariano Absatz (2009-03-13):
370 # Yesterday (with our usual 2-day notice) the Province of San Luis
371 # decided that next Sunday instead of "staying" @utc-03:00 they will go
372 # to utc-04:00 until the second Saturday in October...
373 #
374 # The press release is at
375 # http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102
376 # (I couldn't find the decree, but www.sanluis.gov.ar
377 # is the official page for the Province Government.)
378 #
379 # There's also a note in only one of the major national papers ...
380 # http://www.lanacion.com.ar/nota.asp?nota_id=1107912
381 #
382 # The press release says [quick and dirty translation]:
383 # ... announced that next Sunday, at 00:00, Puntanos (the San Luis
384 # inhabitants) will have to turn back one hour their clocks
385 #
386 # Since then, San Luis will establish its own Province timezone. Thus,
387 # during 2009, this timezone change will run from 00:00 the third Sunday
388 # in March until 24:00 of the second Saturday in October.
389
390 # From Mariano Absatz (2009-10-16):
391 # ...the Province of San Luis is a case in itself.
392 #
393 # The Law at
394 # http://www.diputadossanluis.gov.ar/diputadosasp/paginas/verNorma.asp?NormaID=276
395 # is ambiguous because establishes a calendar from the 2nd Sunday in
396 # October at 0:00 thru the 2nd Saturday in March at 24:00 and the
397 # complement of that starting on the 2nd Sunday of March at 0:00 and
398 # ending on the 2nd Saturday of March at 24:00.
399 #
400 # This clearly breaks every time the 1st of March or October is a Sunday.
401 #
402 # IMHO, the "spirit of the Law" is to make the changes at 0:00 on the 2nd
403 # Sunday of October and March.
404 #
405 # The problem is that the changes in the rest of the Provinces that did
406 # change in 2007/2008, were made according to the Federal Law and Decrees
407 # that did so on the 3rd Sunday of October and March.
408 #
409 # In fact, San Luis actually switched from UTC-4 to UTC-3 last Sunday
410 # (October 11th) at 0:00.
411 #
412 # So I guess a new set of rules, besides "Arg", must be made and the last
413 # America/Argentina/San_Luis entries should change to use these...
414 #
415 # I'm enclosing a patch that does what I say... regretfully, the San Luis
416 # timezone must be called "WART/WARST" even when most of the time (like,
417 # right now) WARST == ART... that is, since last Sunday, all the country
418 # is using UTC-3, but in my patch, San Luis calls it "WARST" and the rest
419 # of the country calls it "ART".
420 # ...
421
422 # From Alexander Krivenyshev (2010-04-09):
423 # According to news reports from El Diario de la República Province San
424 # Luis, Argentina (standard time UTC-04) will keep Daylight Saving Time
425 # after April 11, 2010 - will continue to have same time as rest of
426 # Argentina (UTC-3) (no DST).
427 #
428 # Confirmaron la prórroga del huso horario de verano (Spanish)
429 # http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9
430 # or (some English translation):
431 # http://www.worldtimezone.com/dst_news/dst_news_argentina08.html
432
433 # From Mariano Absatz (2010-04-12):
434 # yes...I can confirm this...and given that San Luis keeps calling
435 # UTC-03:00 "summer time", we should't just let San Luis go back to "Arg"
436 # rules...San Luis is still using "Western ARgentina Time" and it got
437 # stuck on Summer daylight savings time even though the summer is over.
438
439 # From Paul Eggert (2013-09-05):
440 # Perhaps San Luis operates on the legal fiction that it is at UTC-4
441 # with perpetual summer time, but ordinary usage typically seems to
442 # just say it's at UTC-3; see, for example,
443 # http://es.wikipedia.org/wiki/Hora_oficial_argentina
444 # We've documented similar situations as being plain changes to
445 # standard time, so let's do that here too. This does not change UTC
446 # offsets, only tm_isdst and the time zone abbreviations. One minor
447 # plus is that this silences a zic complaint that there's no POSIX TZ
448 # setting for time stamps past 2038.
449
450 # From Paul Eggert (2013-02-21):
451 # Milne says Córdoba time was -4:16:48.2. Round to the nearest second.
452
453 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
454 #
455 # Buenos Aires (BA), Capital Federal (CF),
456 Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31
457 -4:16:48 - CMT 1920 May # Córdoba Mean Time
458 -4:00 - ART 1930 Dec
459 -4:00 Arg AR%sT 1969 Oct 5
460 -3:00 Arg AR%sT 1999 Oct 3
461 -4:00 Arg AR%sT 2000 Mar 3
462 -3:00 Arg AR%sT
463 #
464 # Córdoba (CB), Santa Fe (SF), Entre Ríos (ER), Corrientes (CN), Misiones (MN),
465 # Chaco (CC), Formosa (FM), Santiago del Estero (SE)
466 #
467 # Shanks & Pottenger also make the following claims, which we haven't verified:
468 # - Formosa switched to -3:00 on 1991-01-07.
469 # - Misiones switched to -3:00 on 1990-12-29.
470 # - Chaco switched to -3:00 on 1991-01-04.
471 # - Santiago del Estero switched to -4:00 on 1991-04-01,
472 # then to -3:00 on 1991-04-26.
473 #
474 Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31
475 -4:16:48 - CMT 1920 May
476 -4:00 - ART 1930 Dec
477 -4:00 Arg AR%sT 1969 Oct 5
478 -3:00 Arg AR%sT 1991 Mar 3
479 -4:00 - WART 1991 Oct 20
480 -3:00 Arg AR%sT 1999 Oct 3
481 -4:00 Arg AR%sT 2000 Mar 3
482 -3:00 Arg AR%sT
483 #
484 # Salta (SA), La Pampa (LP), Neuquén (NQ), Rio Negro (RN)
485 Zone America/Argentina/Salta -4:21:40 - LMT 1894 Oct 31
486 -4:16:48 - CMT 1920 May
487 -4:00 - ART 1930 Dec
488 -4:00 Arg AR%sT 1969 Oct 5
489 -3:00 Arg AR%sT 1991 Mar 3
490 -4:00 - WART 1991 Oct 20
491 -3:00 Arg AR%sT 1999 Oct 3
492 -4:00 Arg AR%sT 2000 Mar 3
493 -3:00 Arg AR%sT 2008 Oct 18
494 -3:00 - ART
495 #
496 # Tucumán (TM)
497 Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31
498 -4:16:48 - CMT 1920 May
499 -4:00 - ART 1930 Dec
500 -4:00 Arg AR%sT 1969 Oct 5
501 -3:00 Arg AR%sT 1991 Mar 3
502 -4:00 - WART 1991 Oct 20
503 -3:00 Arg AR%sT 1999 Oct 3
504 -4:00 Arg AR%sT 2000 Mar 3
505 -3:00 - ART 2004 Jun 1
506 -4:00 - WART 2004 Jun 13
507 -3:00 Arg AR%sT
508 #
509 # La Rioja (LR)
510 Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31
511 -4:16:48 - CMT 1920 May
512 -4:00 - ART 1930 Dec
513 -4:00 Arg AR%sT 1969 Oct 5
514 -3:00 Arg AR%sT 1991 Mar 1
515 -4:00 - WART 1991 May 7
516 -3:00 Arg AR%sT 1999 Oct 3
517 -4:00 Arg AR%sT 2000 Mar 3
518 -3:00 - ART 2004 Jun 1
519 -4:00 - WART 2004 Jun 20
520 -3:00 Arg AR%sT 2008 Oct 18
521 -3:00 - ART
522 #
523 # San Juan (SJ)
524 Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31
525 -4:16:48 - CMT 1920 May
526 -4:00 - ART 1930 Dec
527 -4:00 Arg AR%sT 1969 Oct 5
528 -3:00 Arg AR%sT 1991 Mar 1
529 -4:00 - WART 1991 May 7
530 -3:00 Arg AR%sT 1999 Oct 3
531 -4:00 Arg AR%sT 2000 Mar 3
532 -3:00 - ART 2004 May 31
533 -4:00 - WART 2004 Jul 25
534 -3:00 Arg AR%sT 2008 Oct 18
535 -3:00 - ART
536 #
537 # Jujuy (JY)
538 Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31
539 -4:16:48 - CMT 1920 May
540 -4:00 - ART 1930 Dec
541 -4:00 Arg AR%sT 1969 Oct 5
542 -3:00 Arg AR%sT 1990 Mar 4
543 -4:00 - WART 1990 Oct 28
544 -4:00 1:00 WARST 1991 Mar 17
545 -4:00 - WART 1991 Oct 6
546 -3:00 1:00 ARST 1992
547 -3:00 Arg AR%sT 1999 Oct 3
548 -4:00 Arg AR%sT 2000 Mar 3
549 -3:00 Arg AR%sT 2008 Oct 18
550 -3:00 - ART
551 #
552 # Catamarca (CT), Chubut (CH)
553 Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31
554 -4:16:48 - CMT 1920 May
555 -4:00 - ART 1930 Dec
556 -4:00 Arg AR%sT 1969 Oct 5
557 -3:00 Arg AR%sT 1991 Mar 3
558 -4:00 - WART 1991 Oct 20
559 -3:00 Arg AR%sT 1999 Oct 3
560 -4:00 Arg AR%sT 2000 Mar 3
561 -3:00 - ART 2004 Jun 1
562 -4:00 - WART 2004 Jun 20
563 -3:00 Arg AR%sT 2008 Oct 18
564 -3:00 - ART
565 #
566 # Mendoza (MZ)
567 Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31
568 -4:16:48 - CMT 1920 May
569 -4:00 - ART 1930 Dec
570 -4:00 Arg AR%sT 1969 Oct 5
571 -3:00 Arg AR%sT 1990 Mar 4
572 -4:00 - WART 1990 Oct 15
573 -4:00 1:00 WARST 1991 Mar 1
574 -4:00 - WART 1991 Oct 15
575 -4:00 1:00 WARST 1992 Mar 1
576 -4:00 - WART 1992 Oct 18
577 -3:00 Arg AR%sT 1999 Oct 3
578 -4:00 Arg AR%sT 2000 Mar 3
579 -3:00 - ART 2004 May 23
580 -4:00 - WART 2004 Sep 26
581 -3:00 Arg AR%sT 2008 Oct 18
582 -3:00 - ART
583 #
584 # San Luis (SL)
585
586 Rule SanLuis 2008 2009 - Mar Sun>=8 0:00 0 -
587 Rule SanLuis 2007 2008 - Oct Sun>=8 0:00 1:00 S
588
589 Zone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31
590 -4:16:48 - CMT 1920 May
591 -4:00 - ART 1930 Dec
592 -4:00 Arg AR%sT 1969 Oct 5
593 -3:00 Arg AR%sT 1990
594 -3:00 1:00 ARST 1990 Mar 14
595 -4:00 - WART 1990 Oct 15
596 -4:00 1:00 WARST 1991 Mar 1
597 -4:00 - WART 1991 Jun 1
598 -3:00 - ART 1999 Oct 3
599 -4:00 1:00 WARST 2000 Mar 3
600 -3:00 - ART 2004 May 31
601 -4:00 - WART 2004 Jul 25
602 -3:00 Arg AR%sT 2008 Jan 21
603 -4:00 SanLuis WAR%sT 2009 Oct 11
604 -3:00 - ART
605 #
606 # Santa Cruz (SC)
607 Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31
608 -4:16:48 - CMT 1920 May # Córdoba Mean Time
609 -4:00 - ART 1930 Dec
610 -4:00 Arg AR%sT 1969 Oct 5
611 -3:00 Arg AR%sT 1999 Oct 3
612 -4:00 Arg AR%sT 2000 Mar 3
613 -3:00 - ART 2004 Jun 1
614 -4:00 - WART 2004 Jun 20
615 -3:00 Arg AR%sT 2008 Oct 18
616 -3:00 - ART
617 #
618 # Tierra del Fuego, Antártida e Islas del Atlántico Sur (TF)
619 Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31
620 -4:16:48 - CMT 1920 May # Córdoba Mean Time
621 -4:00 - ART 1930 Dec
622 -4:00 Arg AR%sT 1969 Oct 5
623 -3:00 Arg AR%sT 1999 Oct 3
624 -4:00 Arg AR%sT 2000 Mar 3
625 -3:00 - ART 2004 May 30
626 -4:00 - WART 2004 Jun 20
627 -3:00 Arg AR%sT 2008 Oct 18
628 -3:00 - ART
629
630 # Aruba
631 Link America/Curacao America/Aruba
632
633 # Bolivia
634 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
635 Zone America/La_Paz -4:32:36 - LMT 1890
636 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT
637 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST
638 -4:00 - BOT # Bolivia Time
639
640 # Brazil
641
642 # From Paul Eggert (1993-11-18):
643 # The mayor of Rio recently attempted to change the time zone rules
644 # just in his city, in order to leave more summer time for the tourist trade.
645 # The rule change lasted only part of the day;
646 # the federal government refused to follow the city's rules, and business
647 # was in a chaos, so the mayor backed down that afternoon.
648
649 # From IATA SSIM (1996-02):
650 # _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS),
651 # Santa Catarina (SC), Paraná (PR), São Paulo (SP), Rio de Janeiro (RJ),
652 # Espírito Santo (ES), Minas Gerais (MG), Bahia (BA), Goiás (GO),
653 # Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL].
654 # [The last three states are new to this issue of the IATA SSIM.]
655
656 # From Gwillim Law (1996-10-07):
657 # Geography, history (Tocantins was part of Goiás until 1989), and other
658 # sources of time zone information lead me to believe that AL, SE, and TO were
659 # always in BR1, and so the only change was whether or not they observed DST....
660 # The earliest issue of the SSIM I have is 2/91. Each issue from then until
661 # 9/95 says that DST is observed only in the ten states I quoted from 9/95,
662 # along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2
663 # (UTC-4).... The other two time zones given for Brazil are BR3, which is
664 # UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is
665 # UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's
666 # become part of the state of Pernambuco). The boundary between BR1 and BR2
667 # has never been clearly stated. They've simply been called East and West.
668 # However, some conclusions can be drawn from another IATA manual: the Airline
669 # Coding Directory, which lists close to 400 airports in Brazil. For each
670 # airport it gives a time zone which is coded to the SSIM. From that
671 # information, I'm led to conclude that the states of Amapá (AP), Ceará (CE),
672 # Maranhão (MA), Paraíba (PR), Pernambuco (PE), Piauí (PI), and Rio Grande do
673 # Norte (RN), and the eastern part of Pará (PA) are all in BR1 without DST.
674
675 # From Marcos Tadeu (1998-09-27):
676 # Brazilian official page <http://pcdsh01.on.br/verao1.html>
677
678 # From Jesper Nørgaard (2000-11-03):
679 # [For an official list of which regions in Brazil use which time zones, see:]
680 # http://pcdsh01.on.br/Fusbr.htm
681 # http://pcdsh01.on.br/Fusbrhv.htm
682
683 # From Celso Doria via David Madeo (2002-10-09):
684 # The reason for the delay this year has to do with elections in Brazil.
685 #
686 # Unlike in the United States, elections in Brazil are 100% computerized and
687 # the results are known almost immediately. Yesterday, it was the first
688 # round of the elections when 115 million Brazilians voted for President,
689 # Governor, Senators, Federal Deputies, and State Deputies. Nobody is
690 # counting (or re-counting) votes anymore and we know there will be a second
691 # round for the Presidency and also for some Governors. The 2nd round will
692 # take place on October 27th.
693 #
694 # The reason why the DST will only begin November 3rd is that the thousands
695 # of electoral machines used cannot have their time changed, and since the
696 # Constitution says the elections must begin at 8:00 AM and end at 5:00 PM,
697 # the Government decided to postpone DST, instead of changing the Constitution
698 # (maybe, for the next elections, it will be possible to change the clock)...
699
700 # From Rodrigo Severo (2004-10-04):
701 # It's just the biannual change made necessary by the much hyped, supposedly
702 # modern Brazilian eletronic voting machines which, apparently, can't deal
703 # with a time change between the first and the second rounds of the elections.
704
705 # From Steffen Thorsen (2007-09-20):
706 # Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00:
707 # http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975
708
709 # From Paul Schulze (2008-06-24):
710 # ...by law number 11.662 of April 24, 2008 (published in the "Diario
711 # Oficial da União"...) in Brazil there are changes in the timezones,
712 # effective today (00:00am at June 24, 2008) as follows:
713 #
714 # a) The timezone UTC+5 is extinguished, with all the Acre state and the
715 # part of the Amazonas state that had this timezone now being put to the
716 # timezone UTC+4
717 # b) The whole Pará state now is put at timezone UTC+3, instead of just
718 # part of it, as was before.
719 #
720 # This change follows a proposal of senator Tiao Viana of Acre state, that
721 # proposed it due to concerns about open television channels displaying
722 # programs inappropriate to youths in the states that had the timezone
723 # UTC+5 too early in the night. In the occasion, some more corrections
724 # were proposed, trying to unify the timezones of any given state. This
725 # change modifies timezone rules defined in decree 2.784 of 18 June,
726 # 1913.
727
728 # From Rodrigo Severo (2008-06-24):
729 # Just correcting the URL:
730 # https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008
731 #
732 # As a result of the above Decree I believe the America/Rio_Branco
733 # timezone shall be modified from UTC-5 to UTC-4 and a new timezone shall
734 # be created to represent the...west side of the Pará State. I
735 # suggest this new timezone be called Santarem as the most
736 # important/populated city in the affected area.
737 #
738 # This new timezone would be the same as the Rio_Branco timezone up to
739 # the 2008/06/24 change which would be to UTC-3 instead of UTC-4.
740
741 # From Alex Krivenyshev (2008-06-24):
742 # This is a quick reference page for New and Old Brazil Time Zones map.
743 # http://www.worldtimezone.com/brazil-time-new-old.php
744 #
745 # - 4 time zones replaced by 3 time zones - eliminating time zone UTC-05
746 # (state Acre and the part of the Amazonas will be UTC/GMT-04) - western
747 # part of Par state is moving to one timezone UTC-03 (from UTC-04).
748
749 # From Paul Eggert (2002-10-10):
750 # The official decrees referenced below are mostly taken from
751 # Decretos sobre o Horário de Verão no Brasil.
752 # http://pcdsh01.on.br/DecHV.html
753
754 # From Steffen Thorsen (2008-08-29):
755 # As announced by the government and many newspapers in Brazil late
756 # yesterday, Brazil will start DST on 2008-10-19 (need to change rule) and
757 # it will end on 2009-02-15 (current rule for Brazil is fine). Based on
758 # past years experience with the elections, there was a good chance that
759 # the start was postponed to November, but it did not happen this year.
760 #
761 # It has not yet been posted to http://pcdsh01.on.br/DecHV.html
762 #
763 # An official page about it:
764 # http://www.mme.gov.br/site/news/detail.do?newsId=16722
765 # Note that this link does not always work directly, but must be accessed
766 # by going to
767 # http://www.mme.gov.br/first
768 #
769 # One example link that works directly:
770 # http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54
771 # (Portuguese)
772 #
773 # We have a written a short article about it as well:
774 # http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html
775 #
776 # From Alexander Krivenyshev (2011-10-04):
777 # State Bahia will return to Daylight savings time this year after 8 years off.
778 # The announcement was made by Governor Jaques Wagner in an interview to a
779 # television station in Salvador.
780
781 # In Portuguese:
782 # http://g1.globo.com/bahia/noticia/2011/10/governador-jaques-wagner-confirma-horario-de-verao-na-bahia.html
783 # http://noticias.terra.com.br/brasil/noticias/0,,OI5390887-EI8139,00-Bahia+volta+a+ter+horario+de+verao+apos+oito+anos.html
784
785 # From Guilherme Bernardes Rodrigues (2011-10-07):
786 # There is news in the media, however there is still no decree about it.
787 # I just send a e-mail to Zulmira Brandao at http://pcdsh01.on.br/ the
788 # official agency about time in Brazil, and she confirmed that the old rule is
789 # still in force.
790
791 # From Guilherme Bernardes Rodrigues (2011-10-14)
792 # It's official, the President signed a decree that includes Bahia in summer
793 # time.
794 # [ and in a second message (same day): ]
795 # I found the decree.
796 #
797 # DECRETO No- 7.584, DE 13 DE OUTUBRO DE 2011
798 # Link :
799 # http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6
800
801 # From Kelley Cook (2012-10-16):
802 # The governor of state of Bahia in Brazil announced on Thursday that
803 # due to public pressure, he is reversing the DST policy they implemented
804 # last year and will not be going to Summer Time on October 21st....
805 # http://www.correio24horas.com.br/r/artigo/apos-pressoes-wagner-suspende-horario-de-verao-na-bahia
806
807 # From Rodrigo Severo (2012-10-16):
808 # Tocantins state will have DST.
809 # http://noticias.terra.com.br/brasil/noticias/0,,OI6232536-EI306.html
810
811 # From Steffen Thorsen (2013-09-20):
812 # Tocantins in Brazil is very likely not to observe DST from October....
813 # http://conexaoto.com.br/2013/09/18/ministerio-confirma-que-tocantins-esta-fora-do-horario-de-verao-em-2013-mas-falta-publicacao-de-decreto
814 # We will keep this article updated when this is confirmed:
815 # http://www.timeanddate.com/news/time/brazil-starts-dst-2013.html
816
817 # From Steffen Thorsen (2013-10-17):
818 # http://www.timeanddate.com/news/time/acre-amazonas-change-time-zone.html
819 # Senator Jorge Viana announced that Acre will change time zone on November 10.
820 # He did not specify the time of the change, nor if western parts of Amazonas
821 # will change as well.
822 #
823 # From Paul Eggert (2013-10-17):
824 # For now, assume western Amazonas will change as well.
825
826 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
827 # Decree 20,466 <http://pcdsh01.on.br/HV20466.htm> (1931-10-01)
828 # Decree 21,896 <http://pcdsh01.on.br/HV21896.htm> (1932-01-10)
829 Rule Brazil 1931 only - Oct 3 11:00 1:00 S
830 Rule Brazil 1932 1933 - Apr 1 0:00 0 -
831 Rule Brazil 1932 only - Oct 3 0:00 1:00 S
832 # Decree 23,195 <http://pcdsh01.on.br/HV23195.htm> (1933-10-10)
833 # revoked DST.
834 # Decree 27,496 <http://pcdsh01.on.br/HV27496.htm> (1949-11-24)
835 # Decree 27,998 <http://pcdsh01.on.br/HV27998.htm> (1950-04-13)
836 Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S
837 Rule Brazil 1950 only - Apr 16 1:00 0 -
838 Rule Brazil 1951 1952 - Apr 1 0:00 0 -
839 # Decree 32,308 <http://pcdsh01.on.br/HV32308.htm> (1953-02-24)
840 Rule Brazil 1953 only - Mar 1 0:00 0 -
841 # Decree 34,724 <http://pcdsh01.on.br/HV34724.htm> (1953-11-30)
842 # revoked DST.
843 # Decree 52,700 <http://pcdsh01.on.br/HV52700.htm> (1963-10-18)
844 # established DST from 1963-10-23 00:00 to 1964-02-29 00:00
845 # in SP, RJ, GB, MG, ES, due to the prolongation of the drought.
846 # Decree 53,071 <http://pcdsh01.on.br/HV53071.htm> (1963-12-03)
847 # extended the above decree to all of the national territory on 12-09.
848 Rule Brazil 1963 only - Dec 9 0:00 1:00 S
849 # Decree 53,604 <http://pcdsh01.on.br/HV53604.htm> (1964-02-25)
850 # extended summer time by one day to 1964-03-01 00:00 (start of school).
851 Rule Brazil 1964 only - Mar 1 0:00 0 -
852 # Decree 55,639 <http://pcdsh01.on.br/HV55639.htm> (1965-01-27)
853 Rule Brazil 1965 only - Jan 31 0:00 1:00 S
854 Rule Brazil 1965 only - Mar 31 0:00 0 -
855 # Decree 57,303 <http://pcdsh01.on.br/HV57303.htm> (1965-11-22)
856 Rule Brazil 1965 only - Dec 1 0:00 1:00 S
857 # Decree 57,843 <http://pcdsh01.on.br/HV57843.htm> (1966-02-18)
858 Rule Brazil 1966 1968 - Mar 1 0:00 0 -
859 Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S
860 # Decree 63,429 <http://pcdsh01.on.br/HV63429.htm> (1968-10-15)
861 # revoked DST.
862 # Decree 91,698 <http://pcdsh01.on.br/HV91698.htm> (1985-09-27)
863 Rule Brazil 1985 only - Nov 2 0:00 1:00 S
864 # Decree 92,310 (1986-01-21)
865 # Decree 92,463 (1986-03-13)
866 Rule Brazil 1986 only - Mar 15 0:00 0 -
867 # Decree 93,316 (1986-10-01)
868 Rule Brazil 1986 only - Oct 25 0:00 1:00 S
869 Rule Brazil 1987 only - Feb 14 0:00 0 -
870 # Decree 94,922 <http://pcdsh01.on.br/HV94922.htm> (1987-09-22)
871 Rule Brazil 1987 only - Oct 25 0:00 1:00 S
872 Rule Brazil 1988 only - Feb 7 0:00 0 -
873 # Decree 96,676 <http://pcdsh01.on.br/HV96676.htm> (1988-09-12)
874 # except for the states of AC, AM, PA, RR, RO, and AP (then a territory)
875 Rule Brazil 1988 only - Oct 16 0:00 1:00 S
876 Rule Brazil 1989 only - Jan 29 0:00 0 -
877 # Decree 98,077 <http://pcdsh01.on.br/HV98077.htm> (1989-08-21)
878 # with the same exceptions
879 Rule Brazil 1989 only - Oct 15 0:00 1:00 S
880 Rule Brazil 1990 only - Feb 11 0:00 0 -
881 # Decree 99,530 <http://pcdsh01.on.br/HV99530.htm> (1990-09-17)
882 # adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF.
883 # Decree 99,629 (1990-10-19) adds BA, MT.
884 Rule Brazil 1990 only - Oct 21 0:00 1:00 S
885 Rule Brazil 1991 only - Feb 17 0:00 0 -
886 # Unnumbered decree <http://pcdsh01.on.br/HV1991.htm> (1991-09-25)
887 # adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF.
888 Rule Brazil 1991 only - Oct 20 0:00 1:00 S
889 Rule Brazil 1992 only - Feb 9 0:00 0 -
890 # Unnumbered decree <http://pcdsh01.on.br/HV1992.htm> (1992-10-16)
891 # adopted by same states.
892 Rule Brazil 1992 only - Oct 25 0:00 1:00 S
893 Rule Brazil 1993 only - Jan 31 0:00 0 -
894 # Decree 942 <http://pcdsh01.on.br/HV942.htm> (1993-09-28)
895 # adopted by same states, plus AM.
896 # Decree 1,252 <http://pcdsh01.on.br/HV1252.htm> (1994-09-22;
897 # web page corrected 2004-01-07) adopted by same states, minus AM.
898 # Decree 1,636 <http://pcdsh01.on.br/HV1636.htm> (1995-09-14)
899 # adopted by same states, plus MT and TO.
900 # Decree 1,674 <http://pcdsh01.on.br/HV1674.htm> (1995-10-13)
901 # adds AL, SE.
902 Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S
903 Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 -
904 Rule Brazil 1996 only - Feb 11 0:00 0 -
905 # Decree 2,000 <http://pcdsh01.on.br/HV2000.htm> (1996-09-04)
906 # adopted by same states, minus AL, SE.
907 Rule Brazil 1996 only - Oct 6 0:00 1:00 S
908 Rule Brazil 1997 only - Feb 16 0:00 0 -
909 # From Daniel C. Sobral (1998-02-12):
910 # In 1997, the DS began on October 6. The stated reason was that
911 # because international television networks ignored Brazil's policy on DS,
912 # they bought the wrong times on satellite for coverage of Pope's visit.
913 # This year, the ending date of DS was postponed to March 1
914 # to help dealing with the shortages of electric power.
915 #
916 # Decree 2,317 (1997-09-04), adopted by same states.
917 Rule Brazil 1997 only - Oct 6 0:00 1:00 S
918 # Decree 2,495 <http://pcdsh01.on.br/figuras/HV2495.JPG>
919 # (1998-02-10)
920 Rule Brazil 1998 only - Mar 1 0:00 0 -
921 # Decree 2,780 <http://pcdsh01.on.br/figuras/Hv98.jpg> (1998-09-11)
922 # adopted by the same states as before.
923 Rule Brazil 1998 only - Oct 11 0:00 1:00 S
924 Rule Brazil 1999 only - Feb 21 0:00 0 -
925 # Decree 3,150 <http://pcdsh01.on.br/figuras/HV3150.gif>
926 # (1999-08-23) adopted by same states.
927 # Decree 3,188 <http://pcdsh01.on.br/DecHV99.gif> (1999-09-30)
928 # adds SE, AL, PB, PE, RN, CE, PI, MA and RR.
929 Rule Brazil 1999 only - Oct 3 0:00 1:00 S
930 Rule Brazil 2000 only - Feb 27 0:00 0 -
931 # Decree 3,592 <http://pcdsh01.on.br/DEC3592.htm> (2000-09-06)
932 # adopted by the same states as before.
933 # Decree 3,630 <http://pcdsh01.on.br/Dec3630.jpg> (2000-10-13)
934 # repeals DST in PE and RR, effective 2000-10-15 00:00.
935 # Decree 3,632 <http://pcdsh01.on.br/Dec3632.jpg> (2000-10-17)
936 # repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00.
937 # Decree 3,916 <http://pcdsh01.on.br/figuras/HV3916.gif>
938 # (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE.
939 Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S
940 Rule Brazil 2001 2006 - Feb Sun>=15 0:00 0 -
941 # Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE.
942 # 4,399 <http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm>
943 Rule Brazil 2002 only - Nov 3 0:00 1:00 S
944 # Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO.
945 # 4,844 <http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm>
946 Rule Brazil 2003 only - Oct 19 0:00 1:00 S
947 # Decree 5,223 (2004-10-01) reestablishes DST in MT.
948 # 5,223 <http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm>
949 Rule Brazil 2004 only - Nov 2 0:00 1:00 S
950 # Decree 5,539 <http://pcdsh01.on.br/DecHV5539.gif> (2005-09-19),
951 # adopted by the same states as before.
952 Rule Brazil 2005 only - Oct 16 0:00 1:00 S
953 # Decree 5,920 <http://pcdsh01.on.br/DecHV5920.gif> (2006-10-03),
954 # adopted by the same states as before.
955 Rule Brazil 2006 only - Nov 5 0:00 1:00 S
956 Rule Brazil 2007 only - Feb 25 0:00 0 -
957 # Decree 6,212 <http://pcdsh01.on.br/DecHV6212.gif> (2007-09-26),
958 # adopted by the same states as before.
959 Rule Brazil 2007 only - Oct Sun>=8 0:00 1:00 S
960 # From Frederico A. C. Neves (2008-09-10):
961 # According to this decree
962 # http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm
963 # [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the
964 # 3rd Feb Sunday. There is an exception on the return date when this is
965 # the Carnival Sunday then the return date will be the next Sunday...
966 Rule Brazil 2008 max - Oct Sun>=15 0:00 1:00 S
967 Rule Brazil 2008 2011 - Feb Sun>=15 0:00 0 -
968 Rule Brazil 2012 only - Feb Sun>=22 0:00 0 -
969 Rule Brazil 2013 2014 - Feb Sun>=15 0:00 0 -
970 Rule Brazil 2015 only - Feb Sun>=22 0:00 0 -
971 Rule Brazil 2016 2022 - Feb Sun>=15 0:00 0 -
972 Rule Brazil 2023 only - Feb Sun>=22 0:00 0 -
973 Rule Brazil 2024 2025 - Feb Sun>=15 0:00 0 -
974 Rule Brazil 2026 only - Feb Sun>=22 0:00 0 -
975 Rule Brazil 2027 2033 - Feb Sun>=15 0:00 0 -
976 Rule Brazil 2034 only - Feb Sun>=22 0:00 0 -
977 Rule Brazil 2035 2036 - Feb Sun>=15 0:00 0 -
978 Rule Brazil 2037 only - Feb Sun>=22 0:00 0 -
979 # From Arthur David Olson (2008-09-29):
980 # The next is wrong in some years but is better than nothing.
981 Rule Brazil 2038 max - Feb Sun>=15 0:00 0 -
982
983 # The latest ruleset listed above says that the following states observe DST:
984 # DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP.
985
986 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
987 #
988 # Fernando de Noronha (administratively part of PE)
989 Zone America/Noronha -2:09:40 - LMT 1914
990 -2:00 Brazil FN%sT 1990 Sep 17
991 -2:00 - FNT 1999 Sep 30
992 -2:00 Brazil FN%sT 2000 Oct 15
993 -2:00 - FNT 2001 Sep 13
994 -2:00 Brazil FN%sT 2002 Oct 1
995 -2:00 - FNT
996 # Other Atlantic islands have no permanent settlement.
997 # These include Trindade and Martim Vaz (administratively part of ES),
998 # Rocas Atoll (RN), and the St Peter and St Paul Archipelago (PE).
999 # Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01;
1000 # it also included the Penedos.
1001 #
1002 # Amapá (AP), east Pará (PA)
1003 # East Pará includes Belém, Marabá, Serra Norte, and São Félix do Xingu.
1004 # The division between east and west Pará is the river Xingu.
1005 # In the north a very small part from the river Javary (now Jari I guess,
1006 # the border with Amapá) to the Amazon, then to the Xingu.
1007 Zone America/Belem -3:13:56 - LMT 1914
1008 -3:00 Brazil BR%sT 1988 Sep 12
1009 -3:00 - BRT
1010 #
1011 # west Pará (PA)
1012 # West Pará includes Altamira, Óbidos, Prainha, Oriximiná, and Santarém.
1013 Zone America/Santarem -3:38:48 - LMT 1914
1014 -4:00 Brazil AM%sT 1988 Sep 12
1015 -4:00 - AMT 2008 Jun 24 0:00
1016 -3:00 - BRT
1017 #
1018 # Maranhão (MA), Piauí (PI), Ceará (CE), Rio Grande do Norte (RN),
1019 # Paraíba (PB)
1020 Zone America/Fortaleza -2:34:00 - LMT 1914
1021 -3:00 Brazil BR%sT 1990 Sep 17
1022 -3:00 - BRT 1999 Sep 30
1023 -3:00 Brazil BR%sT 2000 Oct 22
1024 -3:00 - BRT 2001 Sep 13
1025 -3:00 Brazil BR%sT 2002 Oct 1
1026 -3:00 - BRT
1027 #
1028 # Pernambuco (PE) (except Atlantic islands)
1029 Zone America/Recife -2:19:36 - LMT 1914
1030 -3:00 Brazil BR%sT 1990 Sep 17
1031 -3:00 - BRT 1999 Sep 30
1032 -3:00 Brazil BR%sT 2000 Oct 15
1033 -3:00 - BRT 2001 Sep 13
1034 -3:00 Brazil BR%sT 2002 Oct 1
1035 -3:00 - BRT
1036 #
1037 # Tocantins (TO)
1038 Zone America/Araguaina -3:12:48 - LMT 1914
1039 -3:00 Brazil BR%sT 1990 Sep 17
1040 -3:00 - BRT 1995 Sep 14
1041 -3:00 Brazil BR%sT 2003 Sep 24
1042 -3:00 - BRT 2012 Oct 21
1043 -3:00 Brazil BR%sT 2013 Sep
1044 -3:00 - BRT
1045 #
1046 # Alagoas (AL), Sergipe (SE)
1047 Zone America/Maceio -2:22:52 - LMT 1914
1048 -3:00 Brazil BR%sT 1990 Sep 17
1049 -3:00 - BRT 1995 Oct 13
1050 -3:00 Brazil BR%sT 1996 Sep 4
1051 -3:00 - BRT 1999 Sep 30
1052 -3:00 Brazil BR%sT 2000 Oct 22
1053 -3:00 - BRT 2001 Sep 13
1054 -3:00 Brazil BR%sT 2002 Oct 1
1055 -3:00 - BRT
1056 #
1057 # Bahia (BA)
1058 # There are too many Salvadors elsewhere, so use America/Bahia instead
1059 # of America/Salvador.
1060 Zone America/Bahia -2:34:04 - LMT 1914
1061 -3:00 Brazil BR%sT 2003 Sep 24
1062 -3:00 - BRT 2011 Oct 16
1063 -3:00 Brazil BR%sT 2012 Oct 21
1064 -3:00 - BRT
1065 #
1066 # Goiás (GO), Distrito Federal (DF), Minas Gerais (MG),
1067 # Espírito Santo (ES), Rio de Janeiro (RJ), São Paulo (SP), Paraná (PR),
1068 # Santa Catarina (SC), Rio Grande do Sul (RS)
1069 Zone America/Sao_Paulo -3:06:28 - LMT 1914
1070 -3:00 Brazil BR%sT 1963 Oct 23 0:00
1071 -3:00 1:00 BRST 1964
1072 -3:00 Brazil BR%sT
1073 #
1074 # Mato Grosso do Sul (MS)
1075 Zone America/Campo_Grande -3:38:28 - LMT 1914
1076 -4:00 Brazil AM%sT
1077 #
1078 # Mato Grosso (MT)
1079 Zone America/Cuiaba -3:44:20 - LMT 1914
1080 -4:00 Brazil AM%sT 2003 Sep 24
1081 -4:00 - AMT 2004 Oct 1
1082 -4:00 Brazil AM%sT
1083 #
1084 # Rondônia (RO)
1085 Zone America/Porto_Velho -4:15:36 - LMT 1914
1086 -4:00 Brazil AM%sT 1988 Sep 12
1087 -4:00 - AMT
1088 #
1089 # Roraima (RR)
1090 Zone America/Boa_Vista -4:02:40 - LMT 1914
1091 -4:00 Brazil AM%sT 1988 Sep 12
1092 -4:00 - AMT 1999 Sep 30
1093 -4:00 Brazil AM%sT 2000 Oct 15
1094 -4:00 - AMT
1095 #
1096 # east Amazonas (AM): Boca do Acre, Jutaí, Manaus, Floriano Peixoto
1097 # The great circle line from Tabatinga to Porto Acre divides
1098 # east from west Amazonas.
1099 Zone America/Manaus -4:00:04 - LMT 1914
1100 -4:00 Brazil AM%sT 1988 Sep 12
1101 -4:00 - AMT 1993 Sep 28
1102 -4:00 Brazil AM%sT 1994 Sep 22
1103 -4:00 - AMT
1104 #
1105 # west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant,
1106 # Eirunepé, Envira, Ipixuna
1107 Zone America/Eirunepe -4:39:28 - LMT 1914
1108 -5:00 Brazil AC%sT 1988 Sep 12
1109 -5:00 - ACT 1993 Sep 28
1110 -5:00 Brazil AC%sT 1994 Sep 22
1111 -5:00 - ACT 2008 Jun 24 0:00
1112 -4:00 - AMT 2013 Nov 10
1113 -5:00 - ACT
1114 #
1115 # Acre (AC)
1116 Zone America/Rio_Branco -4:31:12 - LMT 1914
1117 -5:00 Brazil AC%sT 1988 Sep 12
1118 -5:00 - ACT 2008 Jun 24 0:00
1119 -4:00 - AMT 2013 Nov 10
1120 -5:00 - ACT
1121
1122 # Chile
1123
1124 # From Paul Eggert (2015-04-03):
1125 # Shanks & Pottenger says America/Santiago introduced standard time in
1126 # 1890 and rounds its UTC offset to 70W40; guess that in practice this
1127 # was the same offset as in 1916-1919. It also says Pacific/Easter
1128 # standardized on 109W22 in 1890; assume this didn't change the clocks.
1129 #
1130 # Dates for America/Santiago from 1910 to 2004 are primarily from
1131 # the following source, cited by Oscar van Vlijmen (2006-10-08):
1132 # [1] Chile Law
1133 # http://www.webexhibits.org/daylightsaving/chile.html
1134 # This contains a copy of a this official table:
1135 # Cambios en la hora oficial de Chile desde 1900 (retrieved 2008-03-30)
1136 # http://web.archive.org/web/20080330200901/http://www.horaoficial.cl/cambio.htm
1137 # [1] needs several corrections, though.
1138 #
1139 # The first set of corrections is from:
1140 # [2] History of the Official Time of Chile
1141 # http://www.horaoficial.cl/ing/horaof_ing.html (retrieved 2012-03-06). See:
1142 # http://web.archive.org/web/20120306042032/http://www.horaoficial.cl/ing/horaof_ing.html
1143 # This is an English translation of:
1144 # Historia de la hora oficial de Chile (retrieved 2012-10-24). See:
1145 # http://web.archive.org/web/20121024234627/http://www.horaoficial.cl/horaof.htm
1146 # A fancier Spanish version (requiring mouse-clicking) is at:
1147 # http://www.horaoficial.cl/historia_hora.html
1148 # Conflicts between [1] and [2] were resolved as follows:
1149 #
1150 # - [1] says the 1910 transition was Jan 1, [2] says Jan 10 and cites
1151 # Boletín Nº 1, Aviso Nº 1 (1910). Go with [2].
1152 #
1153 # - [1] says SMT was -4:42:45, [2] says Chile's official time from
1154 # 1916 to 1919 was -4:42:46.3, the meridian of Chile's National
1155 # Astronomical Observatory (OAN), then located in what is now
1156 # Quinta Normal in Santiago. Go with [2], rounding it to -4:42:46.
1157 #
1158 # - [1] says the 1918 transition was Sep 1, [2] says Sep 10 and cites
1159 # Boletín Nº 22, Aviso Nº 129/1918 (1918-08-23). Go with [2].
1160 #
1161 # - [1] does not give times for transitions; assume they occur
1162 # at midnight mainland time, the current common practice. However,
1163 # go with [2]'s specification of 23:00 for the 1947-05-21 transition.
1164 #
1165 # Another correction to [1] is from Jesper Nørgaard Welen, who
1166 # wrote (2006-10-08), "I think that there are some obvious mistakes in
1167 # the suggested link from Oscar van Vlijmen,... for instance entry 66
1168 # says that GMT-4 ended 1990-09-12 while entry 67 only begins GMT-3 at
1169 # 1990-09-15 (they should have been 1990-09-15 and 1990-09-16
1170 # respectively), but anyhow it clears up some doubts too."
1171 #
1172 # Data for Pacific/Easter from 1910 through 1967 come from Shanks &
1173 # Pottenger. After that, for lack of better info assume
1174 # Pacific/Easter is always two hours behind America/Santiago;
1175 # this is known to work for DST transitions starting in 2008 and
1176 # may well be true for earlier transitions.
1177
1178 # From Eduardo Krell (1995-10-19):
1179 # The law says to switch to DST at midnight [24:00] on the second SATURDAY
1180 # of October.... The law is the same for March and October.
1181 # (1998-09-29):
1182 # Because of the drought this year, the government decided to go into
1183 # DST earlier (saturday 9/26 at 24:00). This is a one-time change only ...
1184 # (unless there's another dry season next year, I guess).
1185
1186 # From Julio I. Pacheco Troncoso (1999-03-18):
1187 # Because of the same drought, the government decided to end DST later,
1188 # on April 3, (one-time change).
1189
1190 # From Germán Poo-Caamaño (2008-03-03):
1191 # Due to drought, Chile extends Daylight Time in three weeks. This
1192 # is one-time change (Saturday 3/29 at 24:00 for America/Santiago
1193 # and Saturday 3/29 at 22:00 for Pacific/Easter)
1194 # The Supreme Decree is located at
1195 # http://www.shoa.cl/servicios/supremo316.pdf
1196 #
1197 # From José Miguel Garrido (2008-03-05):
1198 # http://www.shoa.cl/noticias/2008/04hora/hora.htm
1199
1200 # From Angel Chiang (2010-03-04):
1201 # Subject: DST in Chile exceptionally extended to 3 April due to earthquake
1202 # http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098
1203 #
1204 # From Arthur David Olson (2010-03-06):
1205 # Angel Chiang's message confirmed by Julio Pacheco; Julio provided a patch.
1206
1207 # From Glenn Eychaner (2011-03-28):
1208 # http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E}
1209 # In English:
1210 # Chile's clocks will go back an hour this year on the 7th of May instead
1211 # of this Saturday. They will go forward again the 3rd Saturday in
1212 # August, not in October as they have since 1968.
1213
1214 # From Mauricio Parada (2012-02-22), translated by Glenn Eychaner (2012-02-23):
1215 # As stated in the website of the Chilean Energy Ministry
1216 # http://www.minenergia.cl/ministerio/noticias/generales/gobierno-anuncia-fechas-de-cambio-de.html
1217 # The Chilean Government has decided to postpone the entrance into winter time
1218 # (to leave DST) from March 11 2012 to April 28th 2012....
1219 # Quote from the website communication:
1220 #
1221 # 6. For the year 2012, the dates of entry into winter time will be as follows:
1222 # a. Saturday April 28, 2012, clocks should go back 60 minutes; that is, at
1223 # 23:59:59, instead of passing to 0:00, the time should be adjusted to be 23:00
1224 # of the same day.
1225 # b. Saturday, September 1, 2012, clocks should go forward 60 minutes; that is,
1226 # at 23:59:59, instead of passing to 0:00, the time should be adjusted to be
1227 # 01:00 on September 2.
1228
1229 # From Steffen Thorsen (2013-02-15):
1230 # According to several news sources, Chile has extended DST this year,
1231 # they will end DST later and start DST earlier than planned. They
1232 # hope to save energy. The new end date is 2013-04-28 00:00 and new
1233 # start date is 2013-09-08 00:00....
1234 # http://www.gob.cl/informa/2013/02/15/gobierno-anuncia-fechas-de-cambio-de-hora-para-el-ano-2013.htm
1235
1236 # From José Miguel Garrido (2014-02-19):
1237 # Today appeared in the Diario Oficial a decree amending the time change
1238 # dates to 2014.
1239 # DST End: last Saturday of April 2014 (Sun 27 Apr 2014 03:00 UTC)
1240 # DST Start: first Saturday of September 2014 (Sun 07 Sep 2014 04:00 UTC)
1241 # http://www.diariooficial.interior.gob.cl//media/2014/02/19/do-20140219.pdf
1242
1243 # From Eduardo Romero Urra (2015-03-03):
1244 # Today has been published officially that Chile will use the DST time
1245 # permanently until March 25 of 2017
1246 # http://www.diariooficial.interior.gob.cl/media/2015/03/03/1-large.jpg
1247 #
1248 # From Paul Eggert (2015-03-03):
1249 # For now, assume that the extension will persist indefinitely.
1250
1251 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1252 Rule Chile 1927 1931 - Sep 1 0:00 1:00 S
1253 Rule Chile 1928 1932 - Apr 1 0:00 0 -
1254 Rule Chile 1968 only - Nov 3 4:00u 1:00 S
1255 Rule Chile 1969 only - Mar 30 3:00u 0 -
1256 Rule Chile 1969 only - Nov 23 4:00u 1:00 S
1257 Rule Chile 1970 only - Mar 29 3:00u 0 -
1258 Rule Chile 1971 only - Mar 14 3:00u 0 -
1259 Rule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 S
1260 Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 -
1261 Rule Chile 1973 only - Sep 30 4:00u 1:00 S
1262 Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 S
1263 Rule Chile 1987 only - Apr 12 3:00u 0 -
1264 Rule Chile 1988 1990 - Mar Sun>=9 3:00u 0 -
1265 Rule Chile 1988 1989 - Oct Sun>=9 4:00u 1:00 S
1266 Rule Chile 1990 only - Sep 16 4:00u 1:00 S
1267 Rule Chile 1991 1996 - Mar Sun>=9 3:00u 0 -
1268 Rule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 S
1269 Rule Chile 1997 only - Mar 30 3:00u 0 -
1270 Rule Chile 1998 only - Mar Sun>=9 3:00u 0 -
1271 Rule Chile 1998 only - Sep 27 4:00u 1:00 S
1272 Rule Chile 1999 only - Apr 4 3:00u 0 -
1273 Rule Chile 1999 2010 - Oct Sun>=9 4:00u 1:00 S
1274 Rule Chile 2000 2007 - Mar Sun>=9 3:00u 0 -
1275 # N.B.: the end of March 29 in Chile is March 30 in Universal time,
1276 # which is used below in specifying the transition.
1277 Rule Chile 2008 only - Mar 30 3:00u 0 -
1278 Rule Chile 2009 only - Mar Sun>=9 3:00u 0 -
1279 Rule Chile 2010 only - Apr Sun>=1 3:00u 0 -
1280 Rule Chile 2011 only - May Sun>=2 3:00u 0 -
1281 Rule Chile 2011 only - Aug Sun>=16 4:00u 1:00 S
1282 Rule Chile 2012 2015 - Apr Sun>=23 3:00u 0 -
1283 Rule Chile 2012 2014 - Sep Sun>=2 4:00u 1:00 S
1284 # IATA SSIM anomalies: (1992-02) says 1992-03-14;
1285 # (1996-09) says 1998-03-08. Ignore these.
1286 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1287 Zone America/Santiago -4:42:46 - LMT 1890
1288 -4:42:46 - SMT 1910 Jan 10 # Santiago Mean Time
1289 -5:00 - CLT 1916 Jul 1 # Chile Time
1290 -4:42:46 - SMT 1918 Sep 10
1291 -4:00 - CLT 1919 Jul 1
1292 -4:42:46 - SMT 1927 Sep 1
1293 -5:00 Chile CL%sT 1932 Sep 1
1294 -4:00 - CLT 1942 Jun 1
1295 -5:00 - CLT 1942 Aug 1
1296 -4:00 - CLT 1946 Jul 15
1297 -4:00 1:00 CLST 1946 Sep 1 # central Chile
1298 -4:00 - CLT 1947 Apr 1
1299 -5:00 - CLT 1947 May 21 23:00
1300 -4:00 Chile CL%sT 2015 Apr 26 3:00u
1301 -3:00 - CLT
1302 Zone Pacific/Easter -7:17:28 - LMT 1890
1303 -7:17:28 - EMT 1932 Sep # Easter Mean Time
1304 -7:00 Chile EAS%sT 1982 Mar 14 3:00u # Easter Time
1305 -6:00 Chile EAS%sT 2015 Apr 26 3:00u
1306 -5:00 - EAST
1307 #
1308 # Salas y Gómez Island is uninhabited.
1309 # Other Chilean locations, including Juan Fernández Is, Desventuradas Is,
1310 # and Antarctic bases, are like America/Santiago.
1311
1312 # Antarctic base using South American rules
1313 # (See the file 'antarctica' for more.)
1314 #
1315 # Palmer, Anvers Island, since 1965 (moved 2 miles in 1968)
1316 #
1317 # From Ethan Dicks (1996-10-06):
1318 # It keeps the same time as Punta Arenas, Chile, because, just like us
1319 # and the South Pole, that's the other end of their supply line....
1320 # I verified with someone who was there that since 1980,
1321 # Palmer has followed Chile. Prior to that, before the Falklands War,
1322 # Palmer used to be supplied from Argentina.
1323 #
1324 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1325 Zone Antarctica/Palmer 0 - zzz 1965
1326 -4:00 Arg AR%sT 1969 Oct 5
1327 -3:00 Arg AR%sT 1982 May
1328 -4:00 Chile CL%sT 2015 Apr 26 3:00u
1329 -3:00 - CLT
1330
1331 # Colombia
1332
1333 # Milne gives 4:56:16.4 for Bogotá time in 1899; round to nearest. He writes,
1334 # "A variation of fifteen minutes in the public clocks of Bogota is not rare."
1335
1336 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1337 Rule CO 1992 only - May 3 0:00 1:00 S
1338 Rule CO 1993 only - Apr 4 0:00 0 -
1339 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1340 Zone America/Bogota -4:56:16 - LMT 1884 Mar 13
1341 -4:56:16 - BMT 1914 Nov 23 # Bogotá Mean Time
1342 -5:00 CO CO%sT # Colombia Time
1343 # Malpelo, Providencia, San Andres
1344 # no information; probably like America/Bogota
1345
1346 # Curaçao
1347
1348 # Milne gives 4:35:46.9 for Curaçao mean time; round to nearest.
1349 #
1350 # From Paul Eggert (2006-03-22):
1351 # Shanks & Pottenger say that The Bottom and Philipsburg have been at
1352 # -4:00 since standard time was introduced on 1912-03-02; and that
1353 # Kralendijk and Rincon used Kralendijk Mean Time (-4:33:08) from
1354 # 1912-02-02 to 1965-01-01. The former is dubious, since S&P also say
1355 # Saba Island has been like Curaçao.
1356 # This all predates our 1970 cutoff, though.
1357 #
1358 # By July 2007 Curaçao and St Maarten are planned to become
1359 # associated states within the Netherlands, much like Aruba;
1360 # Bonaire, Saba and St Eustatius would become directly part of the
1361 # Netherlands as Kingdom Islands. This won't affect their time zones
1362 # though, as far as we know.
1363 #
1364 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1365 Zone America/Curacao -4:35:47 - LMT 1912 Feb 12 # Willemstad
1366 -4:30 - ANT 1965 # Netherlands Antilles Time
1367 -4:00 - AST
1368
1369 # From Arthur David Olson (2011-06-15):
1370 # use links for places with new iso3166 codes.
1371 # The name "Lower Prince's Quarter" is both longer than fourteen characters
1372 # and contains an apostrophe; use "Lower_Princes" below.
1373
1374 Link America/Curacao America/Lower_Princes # Sint Maarten
1375 Link America/Curacao America/Kralendijk # Caribbean Netherlands
1376
1377 # Ecuador
1378 #
1379 # Milne says the Central and South American Telegraph Company used -5:24:15.
1380 #
1381 # From Paul Eggert (2007-03-04):
1382 # Apparently Ecuador had a failed experiment with DST in 1992.
1383 # <http://midena.gov.ec/content/view/1261/208/> (2007-02-27) and
1384 # <http://www.hoy.com.ec/NoticiaNue.asp?row_id=249856> (2006-11-06) both
1385 # talk about "hora Sixto". Leave this alone for now, as we have no data.
1386 #
1387 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1388 Zone America/Guayaquil -5:19:20 - LMT 1890
1389 -5:14:00 - QMT 1931 # Quito Mean Time
1390 -5:00 - ECT # Ecuador Time
1391 Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno
1392 -5:00 - ECT 1986
1393 -6:00 - GALT # Galápagos Time
1394
1395 # Falklands
1396
1397 # From Paul Eggert (2006-03-22):
1398 # Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except
1399 # the IATA gives 1996-09-08. Go with Shanks & Pottenger.
1400
1401 # From Falkland Islands Government Office, London (2001-01-22)
1402 # via Jesper Nørgaard:
1403 # ... the clocks revert back to Local Mean Time at 2 am on Sunday 15
1404 # April 2001 and advance one hour to summer time at 2 am on Sunday 2
1405 # September. It is anticipated that the clocks will revert back at 2
1406 # am on Sunday 21 April 2002 and advance to summer time at 2 am on
1407 # Sunday 1 September.
1408
1409 # From Rives McDow (2001-02-13):
1410 #
1411 # I have communicated several times with people there, and the last
1412 # time I had communications that was helpful was in 1998. Here is
1413 # what was said then:
1414 #
1415 # "The general rule was that Stanley used daylight saving and the Camp
1416 # did not. However for various reasons many people in the Camp have
1417 # started to use daylight saving (known locally as 'Stanley Time')
1418 # There is no rule as to who uses daylight saving - it is a matter of
1419 # personal choice and so it is impossible to draw a map showing who
1420 # uses it and who does not. Any list would be out of date as soon as
1421 # it was produced. This year daylight saving ended on April 18/19th
1422 # and started again on September 12/13th. I do not know what the rule
1423 # is, but can find out if you like. We do not change at the same time
1424 # as UK or Chile."
1425 #
1426 # I did have in my notes that the rule was "Second Saturday in Sep at
1427 # 0:00 until third Saturday in Apr at 0:00". I think that this does
1428 # not agree in some cases with Shanks; is this true?
1429 #
1430 # Also, there is no mention in the list that some areas in the
1431 # Falklands do not use DST. I have found in my communications there
1432 # that these areas are on the western half of East Falkland and all of
1433 # West Falkland. Stanley is the only place that consistently observes
1434 # DST. Again, as in other places in the world, the farmers don't like
1435 # it. West Falkland is almost entirely sheep farmers.
1436 #
1437 # I know one lady there that keeps a list of which farm keeps DST and
1438 # which doesn't each year. She runs a shop in Stanley, and says that
1439 # the list changes each year. She uses it to communicate to her
1440 # customers, catching them when they are home for lunch or dinner.
1441
1442 # From Paul Eggert (2001-03-05):
1443 # For now, we'll just record the time in Stanley, since we have no
1444 # better info.
1445
1446 # From Steffen Thorsen (2011-04-01):
1447 # The Falkland Islands will not turn back clocks this winter, but stay on
1448 # daylight saving time.
1449 #
1450 # One source:
1451 # http://www.falklandnews.com/public/story.cfm?get=5914&source=3
1452 #
1453 # We have gotten this confirmed by a clerk of the legislative assembly:
1454 # Normally the clocks revert to Local Mean Time (UTC/GMT -4 hours) on the
1455 # third Sunday of April at 0200hrs and advance to Summer Time (UTC/GMT -3
1456 # hours) on the first Sunday of September at 0200hrs.
1457 #
1458 # IMPORTANT NOTE: During 2011, on a trial basis, the Falkland Islands
1459 # will not revert to local mean time, but clocks will remain on Summer
1460 # time (UTC/GMT - 3 hours) throughout the whole of 2011. Any long term
1461 # change to local time following the trial period will be notified.
1462 #
1463 # From Andrew Newman (2012-02-24)
1464 # A letter from Justin McPhee, Chief Executive,
1465 # Cable & Wireless Falkland Islands (dated 2012-02-22)
1466 # states...
1467 # The current Atlantic/Stanley entry under South America expects the
1468 # clocks to go back to standard Falklands Time (FKT) on the 15th April.
1469 # The database entry states that in 2011 Stanley was staying on fixed
1470 # summer time on a trial basis only. FIG need to contact IANA and/or
1471 # the maintainers of the database to inform them we're adopting
1472 # the same policy this year and suggest recommendations for future years.
1473 #
1474 # For now we will assume permanent summer time for the Falklands
1475 # until advised differently (to apply for 2012 and beyond, after the 2011
1476 # experiment was apparently successful.)
1477 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1478 Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S
1479 Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 -
1480 Rule Falk 1939 only - Oct 1 0:00 1:00 S
1481 Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S
1482 Rule Falk 1943 only - Jan 1 0:00 0 -
1483 Rule Falk 1983 only - Sep lastSun 0:00 1:00 S
1484 Rule Falk 1984 1985 - Apr lastSun 0:00 0 -
1485 Rule Falk 1984 only - Sep 16 0:00 1:00 S
1486 Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S
1487 Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 -
1488 Rule Falk 2001 2010 - Apr Sun>=15 2:00 0 -
1489 Rule Falk 2001 2010 - Sep Sun>=1 2:00 1:00 S
1490 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1491 Zone Atlantic/Stanley -3:51:24 - LMT 1890
1492 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time
1493 -4:00 Falk FK%sT 1983 May # Falkland Is Time
1494 -3:00 Falk FK%sT 1985 Sep 15
1495 -4:00 Falk FK%sT 2010 Sep 5 2:00
1496 -3:00 - FKST
1497
1498 # French Guiana
1499 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1500 Zone America/Cayenne -3:29:20 - LMT 1911 Jul
1501 -4:00 - GFT 1967 Oct # French Guiana Time
1502 -3:00 - GFT
1503
1504 # Guyana
1505 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1506 Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown
1507 -3:45 - GBGT 1966 May 26 # Br Guiana Time
1508 -3:45 - GYT 1975 Jul 31 # Guyana Time
1509 -3:00 - GYT 1991
1510 # IATA SSIM (1996-06) says -4:00. Assume a 1991 switch.
1511 -4:00 - GYT
1512
1513 # Paraguay
1514 #
1515 # From Paul Eggert (2006-03-22):
1516 # Shanks & Pottenger say that spring transitions are 01:00 -> 02:00,
1517 # and autumn transitions are 00:00 -> 23:00. Go with pre-1999
1518 # editions of Shanks, and with the IATA, who say transitions occur at 00:00.
1519 #
1520 # From Waldemar Villamayor-Venialbo (2013-09-20):
1521 # No time of the day is established for the adjustment, so people normally
1522 # adjust their clocks at 0 hour of the given dates.
1523 #
1524 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1525 Rule Para 1975 1988 - Oct 1 0:00 1:00 S
1526 Rule Para 1975 1978 - Mar 1 0:00 0 -
1527 Rule Para 1979 1991 - Apr 1 0:00 0 -
1528 Rule Para 1989 only - Oct 22 0:00 1:00 S
1529 Rule Para 1990 only - Oct 1 0:00 1:00 S
1530 Rule Para 1991 only - Oct 6 0:00 1:00 S
1531 Rule Para 1992 only - Mar 1 0:00 0 -
1532 Rule Para 1992 only - Oct 5 0:00 1:00 S
1533 Rule Para 1993 only - Mar 31 0:00 0 -
1534 Rule Para 1993 1995 - Oct 1 0:00 1:00 S
1535 Rule Para 1994 1995 - Feb lastSun 0:00 0 -
1536 Rule Para 1996 only - Mar 1 0:00 0 -
1537 # IATA SSIM (2000-02) says 1999-10-10; ignore this for now.
1538 # From Steffen Thorsen (2000-10-02):
1539 # I have three independent reports that Paraguay changed to DST this Sunday
1540 # (10-01).
1541 #
1542 # Translated by Gwillim Law (2001-02-27) from
1543 # Noticias, a daily paper in Asunción, Paraguay (2000-10-01):
1544 # http://www.diarionoticias.com.py/011000/nacional/naciona1.htm
1545 # Starting at 0:00 today, the clock will be set forward 60 minutes, in
1546 # fulfillment of Decree No. 7,273 of the Executive Power.... The time change
1547 # system has been operating for several years. Formerly there was a separate
1548 # decree each year; the new law has the same effect, but permanently. Every
1549 # year, the time will change on the first Sunday of October; likewise, the
1550 # clock will be set back on the first Sunday of March.
1551 #
1552 Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S
1553 # IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger.
1554 Rule Para 1997 only - Feb lastSun 0:00 0 -
1555 # Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but
1556 # (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27).
1557 Rule Para 1998 2001 - Mar Sun>=1 0:00 0 -
1558 # From Rives McDow (2002-02-28):
1559 # A decree was issued in Paraguay (no. 16350) on 2002-02-26 that changed the
1560 # dst method to be from the first Sunday in September to the first Sunday in
1561 # April.
1562 Rule Para 2002 2004 - Apr Sun>=1 0:00 0 -
1563 Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 S
1564 #
1565 # From Jesper Nørgaard Welen (2005-01-02):
1566 # There are several sources that claim that Paraguay made
1567 # a timezone rule change in autumn 2004.
1568 # From Steffen Thorsen (2005-01-05):
1569 # Decree 1,867 (2004-03-05)
1570 # From Carlos Raúl Perasso via Jesper Nørgaard Welen (2006-10-13)
1571 # http://www.presidencia.gov.py/decretos/D1867.pdf
1572 Rule Para 2004 2009 - Oct Sun>=15 0:00 1:00 S
1573 Rule Para 2005 2009 - Mar Sun>=8 0:00 0 -
1574 # From Carlos Raúl Perasso (2010-02-18):
1575 # By decree number 3958 issued yesterday
1576 # http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf
1577 # Paraguay changes its DST schedule, postponing the March rule to April and
1578 # modifying the October date. The decree reads:
1579 # ...
1580 # Art. 1. It is hereby established that from the second Sunday of the month of
1581 # April of this year (2010), the official time is to be set back 60 minutes,
1582 # and that on the first Sunday of the month of October, it is to be set
1583 # forward 60 minutes, in all the territory of the Paraguayan Republic.
1584 # ...
1585 Rule Para 2010 max - Oct Sun>=1 0:00 1:00 S
1586 Rule Para 2010 2012 - Apr Sun>=8 0:00 0 -
1587 #
1588 # From Steffen Thorsen (2013-03-07):
1589 # Paraguay will end DST on 2013-03-24 00:00....
1590 # http://www.ande.gov.py/interna.php?id=1075
1591 #
1592 # From Carlos Raúl Perasso (2013-03-15):
1593 # The change in Paraguay is now final. Decree number 10780
1594 # http://www.presidencia.gov.py/uploads/pdf/presidencia-3b86ff4b691c79d4f5927ca964922ec74772ce857c02ca054a52a37b49afc7fb.pdf
1595 # From Carlos Raúl Perasso (2014-02-28):
1596 # Decree 1264 can be found at:
1597 # http://www.presidencia.gov.py/archivos/documentos/DECRETO1264_ey9r8zai.pdf
1598 Rule Para 2013 max - Mar Sun>=22 0:00 0 -
1599
1600 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1601 Zone America/Asuncion -3:50:40 - LMT 1890
1602 -3:50:40 - AMT 1931 Oct 10 # Asunción Mean Time
1603 -4:00 - PYT 1972 Oct # Paraguay Time
1604 -3:00 - PYT 1974 Apr
1605 -4:00 Para PY%sT
1606
1607 # Peru
1608 #
1609 # From Evelyn C. Leeper via Mark Brader (2003-10-26)
1610 # <news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net>:
1611 # When we were in Peru in 1985-1986, they apparently switched over
1612 # sometime between December 29 and January 3 while we were on the Amazon.
1613 #
1614 # From Paul Eggert (2006-03-22):
1615 # Shanks & Pottenger don't have this transition. Assume 1986 was like 1987.
1616
1617 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1618 Rule Peru 1938 only - Jan 1 0:00 1:00 S
1619 Rule Peru 1938 only - Apr 1 0:00 0 -
1620 Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S
1621 Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 -
1622 Rule Peru 1986 1987 - Jan 1 0:00 1:00 S
1623 Rule Peru 1986 1987 - Apr 1 0:00 0 -
1624 Rule Peru 1990 only - Jan 1 0:00 1:00 S
1625 Rule Peru 1990 only - Apr 1 0:00 0 -
1626 # IATA is ambiguous for 1993/1995; go with Shanks & Pottenger.
1627 Rule Peru 1994 only - Jan 1 0:00 1:00 S
1628 Rule Peru 1994 only - Apr 1 0:00 0 -
1629 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1630 Zone America/Lima -5:08:12 - LMT 1890
1631 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time?
1632 -5:00 Peru PE%sT # Peru Time
1633
1634 # South Georgia
1635 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1636 Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken
1637 -2:00 - GST # South Georgia Time
1638
1639 # South Sandwich Is
1640 # uninhabited; scientific personnel have wintered
1641
1642 # Suriname
1643 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1644 Zone America/Paramaribo -3:40:40 - LMT 1911
1645 -3:40:52 - PMT 1935 # Paramaribo Mean Time
1646 -3:40:36 - PMT 1945 Oct # The capital moved?
1647 -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time
1648 -3:30 - SRT 1984 Oct # Suriname Time
1649 -3:00 - SRT
1650
1651 # Trinidad and Tobago
1652 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1653 Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2
1654 -4:00 - AST
1655
1656 # These all agree with Trinidad and Tobago since 1970.
1657 Link America/Port_of_Spain America/Anguilla
1658 Link America/Port_of_Spain America/Antigua
1659 Link America/Port_of_Spain America/Dominica
1660 Link America/Port_of_Spain America/Grenada
1661 Link America/Port_of_Spain America/Guadeloupe
1662 Link America/Port_of_Spain America/Marigot # St Martin (French part)
1663 Link America/Port_of_Spain America/Montserrat
1664 Link America/Port_of_Spain America/St_Barthelemy # St Barthélemy
1665 Link America/Port_of_Spain America/St_Kitts # St Kitts & Nevis
1666 Link America/Port_of_Spain America/St_Lucia
1667 Link America/Port_of_Spain America/St_Thomas # Virgin Islands (US)
1668 Link America/Port_of_Spain America/St_Vincent
1669 Link America/Port_of_Spain America/Tortola # Virgin Islands (UK)
1670
1671 # Uruguay
1672 # From Paul Eggert (1993-11-18):
1673 # Uruguay wins the prize for the strangest peacetime manipulation of the rules.
1674 # From Shanks & Pottenger:
1675 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1676 # Whitman gives 1923 Oct 1; go with Shanks & Pottenger.
1677 Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS
1678 Rule Uruguay 1924 1926 - Apr 1 0:00 0 -
1679 Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS
1680 Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS
1681 # Shanks & Pottenger give 1935 Apr 1 0:00 & 1936 Mar 30 0:00; go with Whitman.
1682 Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 -
1683 Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS
1684 Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 -
1685 # Whitman gives 1937 Oct 3; go with Shanks & Pottenger.
1686 Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS
1687 # Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13,
1688 # and 1943 Apr 13 "to present time"; go with Shanks & Pottenger.
1689 Rule Uruguay 1941 only - Aug 1 0:00 0:30 HS
1690 Rule Uruguay 1942 only - Jan 1 0:00 0 -
1691 Rule Uruguay 1942 only - Dec 14 0:00 1:00 S
1692 Rule Uruguay 1943 only - Mar 14 0:00 0 -
1693 Rule Uruguay 1959 only - May 24 0:00 1:00 S
1694 Rule Uruguay 1959 only - Nov 15 0:00 0 -
1695 Rule Uruguay 1960 only - Jan 17 0:00 1:00 S
1696 Rule Uruguay 1960 only - Mar 6 0:00 0 -
1697 Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S
1698 Rule Uruguay 1965 only - Sep 26 0:00 0 -
1699 Rule Uruguay 1966 1967 - Oct 31 0:00 0 -
1700 Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS
1701 Rule Uruguay 1968 1970 - Dec 2 0:00 0 -
1702 Rule Uruguay 1972 only - Apr 24 0:00 1:00 S
1703 Rule Uruguay 1972 only - Aug 15 0:00 0 -
1704 Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS
1705 Rule Uruguay 1974 only - Dec 22 0:00 1:00 S
1706 Rule Uruguay 1976 only - Oct 1 0:00 0 -
1707 Rule Uruguay 1977 only - Dec 4 0:00 1:00 S
1708 Rule Uruguay 1978 only - Apr 1 0:00 0 -
1709 Rule Uruguay 1979 only - Oct 1 0:00 1:00 S
1710 Rule Uruguay 1980 only - May 1 0:00 0 -
1711 Rule Uruguay 1987 only - Dec 14 0:00 1:00 S
1712 Rule Uruguay 1988 only - Mar 14 0:00 0 -
1713 Rule Uruguay 1988 only - Dec 11 0:00 1:00 S
1714 Rule Uruguay 1989 only - Mar 12 0:00 0 -
1715 Rule Uruguay 1989 only - Oct 29 0:00 1:00 S
1716 # Shanks & Pottenger say no DST was observed in 1990/1 and 1991/2,
1717 # and that 1992/3's DST was from 10-25 to 03-01. Go with IATA.
1718 Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 -
1719 Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S
1720 Rule Uruguay 1992 only - Oct 18 0:00 1:00 S
1721 Rule Uruguay 1993 only - Feb 28 0:00 0 -
1722 # From Eduardo Cota (2004-09-20):
1723 # The Uruguayan government has decreed a change in the local time....
1724 # http://www.presidencia.gub.uy/decretos/2004091502.htm
1725 Rule Uruguay 2004 only - Sep 19 0:00 1:00 S
1726 # From Steffen Thorsen (2005-03-11):
1727 # Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to
1728 # save energy ... it was postponed two weeks....
1729 # http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm
1730 Rule Uruguay 2005 only - Mar 27 2:00 0 -
1731 # From Eduardo Cota (2005-09-27):
1732 # http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF
1733 # This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at
1734 # 02:00 local time, official time in Uruguay will be at GMT -2.
1735 Rule Uruguay 2005 only - Oct 9 2:00 1:00 S
1736 Rule Uruguay 2006 only - Mar 12 2:00 0 -
1737 # From Jesper Nørgaard Welen (2006-09-06):
1738 # http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF
1739 Rule Uruguay 2006 max - Oct Sun>=1 2:00 1:00 S
1740 Rule Uruguay 2007 max - Mar Sun>=8 2:00 0 -
1741 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1742 Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28
1743 -3:44:44 - MMT 1920 May 1 # Montevideo MT
1744 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time
1745 -3:00 Uruguay UY%sT
1746
1747 # Venezuela
1748 #
1749 # From John Stainforth (2007-11-28):
1750 # ... the change for Venezuela originally expected for 2007-12-31 has
1751 # been brought forward to 2007-12-09. The official announcement was
1752 # published today in the "Gaceta Oficial de la República Bolivariana
1753 # de Venezuela, número 38.819" (official document for all laws or
1754 # resolution publication)
1755 # http://www.globovision.com/news.php?nid=72208
1756
1757 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1758 Zone America/Caracas -4:27:44 - LMT 1890
1759 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time?
1760 -4:30 - VET 1965 # Venezuela Time
1761 -4:00 - VET 2007 Dec 9 3:00
1762 -4:30 - VET