1 # <pre>
2 # This file is in the public domain, so clarified as of
3 # 2009-05-17 by Arthur David Olson.
4
5 # This data is by no means authoritative; if you think you know better,
6 # go ahead and edit the file (and please send any changes to
7 # tz@iana.org for general use in the future).
8
9 # From Paul Eggert (2006-03-22):
10 # A good source for time zone historical data outside the U.S. is
11 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
12 # San Diego: ACS Publications, Inc. (2003).
13 #
14 # For data circa 1899, a common source is:
15 # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94
16 # <http://www.jstor.org/stable/1774359>.
17 #
18 # Gwillim Law writes that a good source
19 # for recent time zone data is the International Air Transport
20 # Association's Standard Schedules Information Manual (IATA SSIM),
21 # published semiannually. Law sent in several helpful summaries
22 # of the IATA's data after 1990.
23 #
24 # Except where otherwise noted, Shanks & Pottenger is the source for
25 # entries through 1990, and IATA SSIM is the source for entries afterwards.
26 #
27 # Earlier editions of these tables used the North American style (e.g. ARST and
28 # ARDT for Argentine Standard and Daylight Time), but the following quote
29 # suggests that it's better to use European style (e.g. ART and ARST).
30 # I suggest the use of _Summer time_ instead of the more cumbersome
31 # _daylight-saving time_. _Summer time_ seems to be in general use
32 # in Europe and South America.
33 # -- E O Cutler, _New York Times_ (1937-02-14), quoted in
34 # H L Mencken, _The American Language: Supplement I_ (1960), p 466
35 #
36 # Earlier editions of these tables also used the North American style
37 # for time zones in Brazil, but this was incorrect, as Brazilians say
38 # "summer time". Reinaldo Goulart, a Sao Paulo businessman active in
39 # the railroad sector, writes (1999-07-06):
40 # The subject of time zones is currently a matter of discussion/debate in
41 # Brazil. Let's say that "the Brasilia time" is considered the
42 # "official time" because Brasilia is the capital city.
43 # The other three time zones are called "Brasilia time "minus one" or
44 # "plus one" or "plus two". As far as I know there is no such
45 # name/designation as "Eastern Time" or "Central Time".
46 # So I invented the following (English-language) abbreviations for now.
47 # Corrections are welcome!
48 # std dst
49 # -2:00 FNT FNST Fernando de Noronha
50 # -3:00 BRT BRST Brasilia
51 # -4:00 AMT AMST Amazon
52 # -5:00 ACT ACST Acre
53
54 ###############################################################################
55
56 ###############################################################################
57
58 # Argentina
59
60 # From Bob Devine (1988-01-28):
61 # Argentina: first Sunday in October to first Sunday in April since 1976.
62 # Double Summer time from 1969 to 1974. Switches at midnight.
63
64 # From U. S. Naval Observatory (1988-01-199):
65 # ARGENTINA 3 H BEHIND UTC
66
67 # From Hernan G. Otero (1995-06-26):
68 # I am sending modifications to the Argentine time zone table...
69 # AR was chosen because they are the ISO letters that represent Argentina.
70
71 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
72 Rule Arg 1930 only - Dec 1 0:00 1:00 S
73 Rule Arg 1931 only - Apr 1 0:00 0 -
74 Rule Arg 1931 only - Oct 15 0:00 1:00 S
75 Rule Arg 1932 1940 - Mar 1 0:00 0 -
76 Rule Arg 1932 1939 - Nov 1 0:00 1:00 S
77 Rule Arg 1940 only - Jul 1 0:00 1:00 S
78 Rule Arg 1941 only - Jun 15 0:00 0 -
79 Rule Arg 1941 only - Oct 15 0:00 1:00 S
80 Rule Arg 1943 only - Aug 1 0:00 0 -
81 Rule Arg 1943 only - Oct 15 0:00 1:00 S
82 Rule Arg 1946 only - Mar 1 0:00 0 -
83 Rule Arg 1946 only - Oct 1 0:00 1:00 S
84 Rule Arg 1963 only - Oct 1 0:00 0 -
85 Rule Arg 1963 only - Dec 15 0:00 1:00 S
86 Rule Arg 1964 1966 - Mar 1 0:00 0 -
87 Rule Arg 1964 1966 - Oct 15 0:00 1:00 S
88 Rule Arg 1967 only - Apr 2 0:00 0 -
89 Rule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 S
90 Rule Arg 1968 1969 - Apr Sun>=1 0:00 0 -
91 Rule Arg 1974 only - Jan 23 0:00 1:00 S
92 Rule Arg 1974 only - May 1 0:00 0 -
93 Rule Arg 1988 only - Dec 1 0:00 1:00 S
94 #
95 # From Hernan G. Otero (1995-06-26):
96 # These corrections were contributed by InterSoft Argentina S.A.,
97 # obtaining the data from the:
98 # Talleres de Hidrografia Naval Argentina
99 # (Argentine Naval Hydrography Institute)
100 Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 -
101 Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S
102 #
103 # From Hernan G. Otero (1995-06-26):
104 # From this moment on, the law that mandated the daylight saving
105 # time corrections was derogated and no more modifications
106 # to the time zones (for daylight saving) are now made.
107 #
108 # From Rives McDow (2000-01-10):
109 # On October 3, 1999, 0:00 local, Argentina implemented daylight savings time,
110 # which did not result in the switch of a time zone, as they stayed 9 hours
111 # from the International Date Line.
112 Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 S
113 # From Paul Eggert (2007-12-28):
114 # DST was set to expire on March 5, not March 3, but since it was converted
115 # to standard time on March 3 it's more convenient for us to pretend that
116 # it ended on March 3.
117 Rule Arg 2000 only - Mar 3 0:00 0 -
118 #
119 # From Peter Gradelski via Steffen Thorsen (2000-03-01):
120 # We just checked with our Sao Paulo office and they say the government of
121 # Argentina decided not to become one of the countries that go on or off DST.
122 # So Buenos Aires should be -3 hours from GMT at all times.
123 #
124 # From Fabian L. Arce Jofre (2000-04-04):
125 # The law that claimed DST for Argentina was derogated by President Fernando
126 # de la Rua on March 2, 2000, because it would make people spend more energy
127 # in the winter time, rather than less. The change took effect on March 3.
128 #
129 # From Mariano Absatz (2001-06-06):
130 # one of the major newspapers here in Argentina said that the 1999
131 # Timezone Law (which never was effectively applied) will (would?) be
132 # in effect.... The article is at
133 # http://ar.clarin.com/diario/2001-06-06/e-01701.htm
134 # ... The Law itself is "Ley No 25155", sanctioned on 1999-08-25, enacted
135 # 1999-09-17, and published 1999-09-21. The official publication is at:
136 # http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF
137 # Regretfully, you have to subscribe (and pay) for the on-line version....
138 #
139 # (2001-06-12):
140 # the timezone for Argentina will not change next Sunday.
141 # Apparently it will do so on Sunday 24th....
142 # http://ar.clarin.com/diario/2001-06-12/s-03501.htm
143 #
144 # (2001-06-25):
145 # Last Friday (yes, the last working day before the date of the change), the
146 # Senate annulled the 1999 law that introduced the changes later postponed.
147 # http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm
148 # It remains the vote of the Deputies..., but it will be the same....
149 # This kind of things had always been done this way in Argentina.
150 # We are still -03:00 all year round in all of the country.
151 #
152 # From Steffen Thorsen (2007-12-21):
153 # A user (Leonardo Chaim) reported that Argentina will adopt DST....
154 # all of the country (all Zone-entries) are affected. News reports like
155 # http://www.lanacion.com.ar/opinion/nota.asp?nota_id=973037 indicate
156 # that Argentina will use DST next year as well, from October to
157 # March, although exact rules are not given.
158 #
159 # From Jesper Norgaard Welen (2007-12-26)
160 # The last hurdle of Argentina DST is over, the proposal was approved in
161 # the lower chamber too (Deputados) with a vote 192 for and 2 against.
162 # By the way thanks to Mariano Absatz and Daniel Mario Vega for the link to
163 # the original scanned proposal, where the dates and the zero hours are
164 # clear and unambiguous...This is the article about final approval:
165 # <a href="http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996">
166 # http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996
167 # </a>
168 #
169 # From Paul Eggert (2007-12-22):
170 # For dates after mid-2008, the following rules are my guesses and
171 # are quite possibly wrong, but are more likely than no DST at all.
172
173 # From Alexander Krivenyshev (2008-09-05):
174 # As per message from Carlos Alberto Fonseca Arauz (Nicaragua),
175 # Argentina will start DST on Sunday October 19, 2008.
176 #
177 # <a href="http://www.worldtimezone.com/dst_news/dst_news_argentina03.html">
178 # http://www.worldtimezone.com/dst_news/dst_news_argentina03.html
179 # </a>
180 # OR
181 # <a href="http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish)">
182 # http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish)
183 # </a>
184
185 # From Rodrigo Severo (2008-10-06):
186 # Here is some info available at a Gentoo bug related to TZ on Argentina's DST:
187 # ...
188 # ------- Comment #1 from [jmdocile] 2008-10-06 16:28 0000 -------
189 # Hi, there is a problem with timezone-data-2008e and maybe with
190 # timezone-data-2008f
191 # Argentinian law [Number] 25.155 is no longer valid.
192 # <a href="http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm">
193 # http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm
194 # </a>
195 # The new one is law [Number] 26.350
196 # <a href="http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm">
197 # http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm
198 # </a>
199 # So there is no summer time in Argentina for now.
200
201 # From Mariano Absatz (2008-10-20):
202 # Decree 1693/2008 applies Law 26.350 for the summer 2008/2009 establishing DST in Argentina
203 # From 2008-10-19 until 2009-03-15
204 # <a href="http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01">
205 # http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01
206 # </a>
207 #
208 # Decree 1705/2008 excepting 12 Provinces from applying DST in the summer 2008/2009:
209 # Catamarca, La Rioja, Mendoza, Salta, San Juan, San Luis, La Pampa, Neuquen, Rio Negro, Chubut, Santa Cruz
210 # and Tierra del Fuego
211 # <a href="http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01">
212 # http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01
213 # </a>
214 #
215 # Press release 235 dated Saturday October 18th, from the Government of the Province of Jujuy saying
216 # it will not apply DST either (even when it was not included in Decree 1705/2008)
217 # <a href="http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc">
218 # http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc
219 # </a>
220
221 # From fullinet (2009-10-18):
222 # As announced in
223 # <a hef="http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356">
224 # http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356
225 # </a>
226 # (an official .gob.ar) under title: "Sin Cambio de Hora" (english: "No hour change")
227 #
228 # "Por el momento, el Gobierno Nacional resolvio no modificar la hora
229 # oficial, decision que estaba en estudio para su implementacion el
230 # domingo 18 de octubre. Desde el Ministerio de Planificacion se anuncio
231 # que la Argentina hoy, en estas condiciones meteorologicas, no necesita
232 # la modificacion del huso horario, ya que 2009 nos encuentra con
233 # crecimiento en la produccion y distribucion energetica."
234
235 Rule Arg 2007 only - Dec 30 0:00 1:00 S
236 Rule Arg 2008 2009 - Mar Sun>=15 0:00 0 -
237 Rule Arg 2008 only - Oct Sun>=15 0:00 1:00 S
238
239 # From Mariano Absatz (2004-05-21):
240 # Today it was officially published that the Province of Mendoza is changing
241 # its timezone this winter... starting tomorrow night....
242 # http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf
243 # From Paul Eggert (2004-05-24):
244 # It's Law No. 7,210. This change is due to a public power emergency, so for
245 # now we'll assume it's for this year only.
246 #
247 # From Paul Eggert (2006-03-22):
248 # <a href="http://www.spicasc.net/horvera.html">
249 # Hora de verano para la Republica Argentina (2003-06-08)
250 # </a> says that standard time in Argentina from 1894-10-31
251 # to 1920-05-01 was -4:16:48.25. Go with this more-precise value
252 # over Shanks & Pottenger.
253 #
254 # From Mariano Absatz (2004-06-05):
255 # These media articles from a major newspaper mostly cover the current state:
256 # http://www.lanacion.com.ar/04/05/27/de_604825.asp
257 # http://www.lanacion.com.ar/04/05/28/de_605203.asp
258 #
259 # The following eight (8) provinces pulled clocks back to UTC-04:00 at
260 # midnight Monday May 31st. (that is, the night between 05/31 and 06/01).
261 # Apparently, all nine provinces would go back to UTC-03:00 at the same
262 # time in October 17th.
263 #
264 # Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz,
265 # Tierra del Fuego, Tucuman.
266 #
267 # From Mariano Absatz (2004-06-14):
268 # ... this weekend, the Province of Tucuman decided it'd go back to UTC-03:00
269 # yesterday midnight (that is, at 24:00 Saturday 12th), since the people's
270 # annoyance with the change is much higher than the power savings obtained....
271 #
272 # From Gwillim Law (2004-06-14):
273 # http://www.lanacion.com.ar/04/06/10/de_609078.asp ...
274 # "The time change in Tierra del Fuego was a conflicted decision from
275 # the start. The government had decreed that the measure would take
276 # effect on June 1, but a normative error forced the new time to begin
277 # three days earlier, from a Saturday to a Sunday....
278 # Our understanding was that the change was originally scheduled to take place
279 # on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other
280 # provinces). Sunday was May 30, only two days earlier. So the article
281 # contains a contradiction. I would give more credence to the Saturday/Sunday
282 # date than the "three days earlier" phrase, and conclude that Tierra del
283 # Fuego set its clocks back at 2004-05-30 00:00.
284 #
285 # From Steffen Thorsen (2004-10-05):
286 # The previous law 7210 which changed the province of Mendoza's time zone
287 # back in May have been modified slightly in a new law 7277, which set the
288 # new end date to 2004-09-26 (original date was 2004-10-17).
289 # http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf
290 #
291 # From Mariano Absatz (2004-10-05):
292 # San Juan changed from UTC-03:00 to UTC-04:00 at midnight between
293 # Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00
294 # at midnight between Saturday, July 24th and Sunday, July 25th....
295 # http://www.sanjuan.gov.ar/prensa/archivo/000329.html
296 # http://www.sanjuan.gov.ar/prensa/archivo/000426.html
297 # http://www.sanjuan.gov.ar/prensa/archivo/000441.html
298
299 # From Alex Krivenyshev (2008-01-17):
300 # Here are articles that Argentina Province San Luis is planning to end DST
301 # as earlier as upcoming Monday January 21, 2008 or February 2008:
302 #
303 # Provincia argentina retrasa reloj y marca diferencia con resto del pais
304 # (Argentine Province delayed clock and mark difference with the rest of the
305 # country)
306 # <a href="http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel">
307 # http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel
308 # </a>
309 #
310 # Es inminente que en San Luis atrasen una hora los relojes
311 # (It is imminent in San Luis clocks one hour delay)
312 # <a href="http://www.lagaceta.com.ar/vernotae.asp?id_nota=253414">
313 # http://www.lagaceta.com.ar/vernotae.asp?id_nota=253414
314 # </a>
315 #
316 # <a href="http://www.worldtimezone.net/dst_news/dst_news_argentina02.html">
317 # http://www.worldtimezone.net/dst_news/dst_news_argentina02.html
318 # </a>
319
320 # From Jesper Norgaard Welen (2008-01-18):
321 # The page of the San Luis provincial government
322 # <a href="http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812">
323 # http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812
324 # </a>
325 # confirms what Alex Krivenyshev has earlier sent to the tz
326 # emailing list about that San Luis plans to return to standard
327 # time much earlier than the rest of the country. It also
328 # confirms that upon request the provinces San Juan and Mendoza
329 # refused to follow San Luis in this change.
330 #
331 # The change is supposed to take place Monday the 21.st at 0:00
332 # hours. As far as I understand it if this goes ahead, we need
333 # a new timezone for San Luis (although there are also documented
334 # independent changes in the southamerica file of San Luis in
335 # 1990 and 1991 which has not been confirmed).
336
337 # From Jesper Norgaard Welen (2008-01-25):
338 # Unfortunately the below page has become defunct, about the San Luis
339 # time change. Perhaps because it now is part of a group of pages "Most
340 # important pages of 2008."
341 #
342 # You can use
343 # <a href="http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834">
344 # http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834
345 # </a>
346 # instead it seems. Or use "Buscador" from the main page of the San Luis
347 # government, and fill in "huso" and click OK, and you will get 3 pages
348 # from which the first one is identical to the above.
349
350 # From Mariano Absatz (2008-01-28):
351 # I can confirm that the Province of San Luis (and so far only that
352 # province) decided to go back to UTC-3 effective midnight Jan 20th 2008
353 # (that is, Monday 21st at 0:00 is the time the clocks were delayed back
354 # 1 hour), and they intend to keep UTC-3 as their timezone all year round
355 # (that is, unless they change their mind any minute now).
356 #
357 # So we'll have to add yet another city to 'southamerica' (I think San
358 # Luis city is the mos populated city in the Province, so it'd be
359 # America/Argentina/San_Luis... of course I can't remember if San Luis's
360 # history of particular changes goes along with Mendoza or San Juan :-(
361 # (I only remember not being able to collect hard facts about San Luis
362 # back in 2004, when these provinces changed to UTC-4 for a few days, I
363 # mailed them personally and never got an answer).
364
365 # From Paul Eggert (2008-06-30):
366 # Unless otherwise specified, data are from Shanks & Pottenger through 1992,
367 # from the IATA otherwise. As noted below, Shanks & Pottenger say that
368 # America/Cordoba split into 6 subregions during 1991/1992, one of which
369 # was America/San_Luis, but we haven't verified this yet so for now we'll
370 # keep America/Cordoba a single region rather than splitting it into the
371 # other 5 subregions.
372
373 # From Mariano Absatz (2009-03-13):
374 # Yesterday (with our usual 2-day notice) the Province of San Luis
375 # decided that next Sunday instead of "staying" @utc-03:00 they will go
376 # to utc-04:00 until the second Saturday in October...
377 #
378 # The press release is at
379 # <a href="http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102">
380 # http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102
381 # </a>
382 # (I couldn't find the decree, but
383 # <a href="http://www.sanluis.gov.ar">
384 # www.sanluis.gov.ar
385 # <a/>
386 # is the official page for the Province Government).
387 #
388 # There's also a note in only one of the major national papers ...
389 # http://www.lanacion.com.ar/nota.asp?nota_id=1107912
390 #
391 # The press release says [quick and dirty translation]:
392 # ... announced that next Sunday, at 00:00, Puntanos (the San Luis
393 # inhabitants) will have to turn back one hour their clocks
394 #
395 # Since then, San Luis will establish its own Province timezone. Thus,
396 # during 2009, this timezone change will run from 00:00 the third Sunday
397 # in March until 24:00 of the second Saturday in October.
398
399 # From Mariano Absatz (2009-10-16):
400 # ...the Province of San Luis is a case in itself.
401 #
402 # The Law at
403 # <a href="http://www.diputadossanluis.gov.ar/diputadosasp/paginas/verNorma.asp?NormaID=276>"
404 # http://www.diputadossanluis.gov.ar/diputadosasp/paginas/verNorma.asp?NormaID=276
405 # </a>
406 # is ambiguous because establishes a calendar from the 2nd Sunday in
407 # October at 0:00 thru the 2nd Saturday in March at 24:00 and the
408 # complement of that starting on the 2nd Sunday of March at 0:00 and
409 # ending on the 2nd Saturday of March at 24:00.
410 #
411 # This clearly breaks every time the 1st of March or October is a Sunday.
412 #
413 # IMHO, the "spirit of the Law" is to make the changes at 0:00 on the 2nd
414 # Sunday of October and March.
415 #
416 # The problem is that the changes in the rest of the Provinces that did
417 # change in 2007/2008, were made according to the Federal Law and Decrees
418 # that did so on the 3rd Sunday of October and March.
419 #
420 # In fact, San Luis actually switched from UTC-4 to UTC-3 last Sunday
421 # (October 11th) at 0:00.
422 #
423 # So I guess a new set of rules, besides "Arg", must be made and the last
424 # America/Argentina/San_Luis entries should change to use these...
425 #
426 # I'm enclosing a patch that does what I say... regretfully, the San Luis
427 # timezone must be called "WART/WARST" even when most of the time (like,
428 # right now) WARST == ART... that is, since last Sunday, all the country
429 # is using UTC-3, but in my patch, San Luis calls it "WARST" and the rest
430 # of the country calls it "ART".
431 # ...
432
433 # From Alexander Krivenyshev (2010-04-09):
434 # According to news reports from El Diario de la Republica Province San
435 # Luis, Argentina (standard time UTC-04) will keep Daylight Saving Time
436 # after April 11, 2010--will continue to have same time as rest of
437 # Argentina (UTC-3) (no DST).
438 #
439 # Confirmaron la prórroga del huso horario de verano (Spanish)
440 # <a href="http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9">
441 # http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9
442 # </a>
443 # or (some English translation):
444 # <a href="http://www.worldtimezone.com/dst_news/dst_news_argentina08.html">
445 # http://www.worldtimezone.com/dst_news/dst_news_argentina08.html
446 # </a>
447
448 # From Mariano Absatz (2010-04-12):
449 # yes...I can confirm this...and given that San Luis keeps calling
450 # UTC-03:00 "summer time", we should't just let San Luis go back to "Arg"
451 # rules...San Luis is still using "Western ARgentina Time" and it got
452 # stuck on Summer daylight savings time even though the summer is over.
453
454 # From Paul Eggert (2013-09-05):
455 # Perhaps San Luis operates on the legal fiction that it is at UTC-4
456 # with perpetual summer time, but ordinary usage typically seems to
457 # just say it's at UTC-3; see, for example,
458 # <http://es.wikipedia.org/wiki/Hora_oficial_argentina>.
459 # We've documented similar situations as being plain changes to
460 # standard time, so let's do that here too. This does not change UTC
461 # offsets, only tm_isdst and the time zone abbreviations. One minor
462 # plus is that this silences a zic complaint that there's no POSIX TZ
463 # setting for time stamps past 2038.
464
465 # From Paul Eggert (2013-02-21):
466 # Milne says Cordoba time was -4:16:48.2. Round to the nearest second.
467
468 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
469 #
470 # Buenos Aires (BA), Capital Federal (CF),
471 Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31
472 -4:16:48 - CMT 1920 May # Cordoba Mean Time
473 -4:00 - ART 1930 Dec
474 -4:00 Arg AR%sT 1969 Oct 5
475 -3:00 Arg AR%sT 1999 Oct 3
476 -4:00 Arg AR%sT 2000 Mar 3
477 -3:00 Arg AR%sT
478 #
479 # Cordoba (CB), Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN),
480 # Chaco (CC), Formosa (FM), Santiago del Estero (SE)
481 #
482 # Shanks & Pottenger also make the following claims, which we haven't verified:
483 # - Formosa switched to -3:00 on 1991-01-07.
484 # - Misiones switched to -3:00 on 1990-12-29.
485 # - Chaco switched to -3:00 on 1991-01-04.
486 # - Santiago del Estero switched to -4:00 on 1991-04-01,
487 # then to -3:00 on 1991-04-26.
488 #
489 Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31
490 -4:16:48 - CMT 1920 May
491 -4:00 - ART 1930 Dec
492 -4:00 Arg AR%sT 1969 Oct 5
493 -3:00 Arg AR%sT 1991 Mar 3
494 -4:00 - WART 1991 Oct 20
495 -3:00 Arg AR%sT 1999 Oct 3
496 -4:00 Arg AR%sT 2000 Mar 3
497 -3:00 Arg AR%sT
498 #
499 # Salta (SA), La Pampa (LP), Neuquen (NQ), Rio Negro (RN)
500 Zone America/Argentina/Salta -4:21:40 - LMT 1894 Oct 31
501 -4:16:48 - CMT 1920 May
502 -4:00 - ART 1930 Dec
503 -4:00 Arg AR%sT 1969 Oct 5
504 -3:00 Arg AR%sT 1991 Mar 3
505 -4:00 - WART 1991 Oct 20
506 -3:00 Arg AR%sT 1999 Oct 3
507 -4:00 Arg AR%sT 2000 Mar 3
508 -3:00 Arg AR%sT 2008 Oct 18
509 -3:00 - ART
510 #
511 # Tucuman (TM)
512 Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31
513 -4:16:48 - CMT 1920 May
514 -4:00 - ART 1930 Dec
515 -4:00 Arg AR%sT 1969 Oct 5
516 -3:00 Arg AR%sT 1991 Mar 3
517 -4:00 - WART 1991 Oct 20
518 -3:00 Arg AR%sT 1999 Oct 3
519 -4:00 Arg AR%sT 2000 Mar 3
520 -3:00 - ART 2004 Jun 1
521 -4:00 - WART 2004 Jun 13
522 -3:00 Arg AR%sT
523 #
524 # La Rioja (LR)
525 Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31
526 -4:16:48 - CMT 1920 May
527 -4:00 - ART 1930 Dec
528 -4:00 Arg AR%sT 1969 Oct 5
529 -3:00 Arg AR%sT 1991 Mar 1
530 -4:00 - WART 1991 May 7
531 -3:00 Arg AR%sT 1999 Oct 3
603
604 Zone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31
605 -4:16:48 - CMT 1920 May
606 -4:00 - ART 1930 Dec
607 -4:00 Arg AR%sT 1969 Oct 5
608 -3:00 Arg AR%sT 1990
609 -3:00 1:00 ARST 1990 Mar 14
610 -4:00 - WART 1990 Oct 15
611 -4:00 1:00 WARST 1991 Mar 1
612 -4:00 - WART 1991 Jun 1
613 -3:00 - ART 1999 Oct 3
614 -4:00 1:00 WARST 2000 Mar 3
615 -3:00 - ART 2004 May 31
616 -4:00 - WART 2004 Jul 25
617 -3:00 Arg AR%sT 2008 Jan 21
618 -4:00 SanLuis WAR%sT 2009 Oct 11
619 -3:00 - ART
620 #
621 # Santa Cruz (SC)
622 Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31
623 -4:16:48 - CMT 1920 May # Cordoba Mean Time
624 -4:00 - ART 1930 Dec
625 -4:00 Arg AR%sT 1969 Oct 5
626 -3:00 Arg AR%sT 1999 Oct 3
627 -4:00 Arg AR%sT 2000 Mar 3
628 -3:00 - ART 2004 Jun 1
629 -4:00 - WART 2004 Jun 20
630 -3:00 Arg AR%sT 2008 Oct 18
631 -3:00 - ART
632 #
633 # Tierra del Fuego, Antartida e Islas del Atlantico Sur (TF)
634 Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31
635 -4:16:48 - CMT 1920 May # Cordoba Mean Time
636 -4:00 - ART 1930 Dec
637 -4:00 Arg AR%sT 1969 Oct 5
638 -3:00 Arg AR%sT 1999 Oct 3
639 -4:00 Arg AR%sT 2000 Mar 3
640 -3:00 - ART 2004 May 30
641 -4:00 - WART 2004 Jun 20
642 -3:00 Arg AR%sT 2008 Oct 18
643 -3:00 - ART
644
645 # Aruba
646 Link America/Curacao America/Aruba
647
648 # Bolivia
649 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
650 Zone America/La_Paz -4:32:36 - LMT 1890
651 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT
652 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST
653 -4:00 - BOT # Bolivia Time
654
655 # Brazil
656
657 # From Paul Eggert (1993-11-18):
658 # The mayor of Rio recently attempted to change the time zone rules
659 # just in his city, in order to leave more summer time for the tourist trade.
660 # The rule change lasted only part of the day;
661 # the federal government refused to follow the city's rules, and business
662 # was in a chaos, so the mayor backed down that afternoon.
663
664 # From IATA SSIM (1996-02):
665 # _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS),
666 # Santa Catarina (SC), Parana (PR), Sao Paulo (SP), Rio de Janeiro (RJ),
667 # Espirito Santo (ES), Minas Gerais (MG), Bahia (BA), Goias (GO),
668 # Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL].
669 # [The last three states are new to this issue of the IATA SSIM.]
670
671 # From Gwillim Law (1996-10-07):
672 # Geography, history (Tocantins was part of Goias until 1989), and other
673 # sources of time zone information lead me to believe that AL, SE, and TO were
674 # always in BR1, and so the only change was whether or not they observed DST....
675 # The earliest issue of the SSIM I have is 2/91. Each issue from then until
676 # 9/95 says that DST is observed only in the ten states I quoted from 9/95,
677 # along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2
678 # (UTC-4).... The other two time zones given for Brazil are BR3, which is
679 # UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is
680 # UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's
681 # become part of the state of Pernambuco). The boundary between BR1 and BR2
682 # has never been clearly stated. They've simply been called East and West.
683 # However, some conclusions can be drawn from another IATA manual: the Airline
684 # Coding Directory, which lists close to 400 airports in Brazil. For each
685 # airport it gives a time zone which is coded to the SSIM. From that
686 # information, I'm led to conclude that the states of Amapa (AP), Ceara (CE),
687 # Maranhao (MA), Paraiba (PR), Pernambuco (PE), Piaui (PI), and Rio Grande do
688 # Norte (RN), and the eastern part of Para (PA) are all in BR1 without DST.
689
690 # From Marcos Tadeu (1998-09-27):
691 # <a href="http://pcdsh01.on.br/verao1.html">
692 # Brazilian official page
693 # </a>
694
695 # From Jesper Norgaard (2000-11-03):
696 # [For an official list of which regions in Brazil use which time zones, see:]
697 # http://pcdsh01.on.br/Fusbr.htm
698 # http://pcdsh01.on.br/Fusbrhv.htm
699
700 # From Celso Doria via David Madeo (2002-10-09):
701 # The reason for the delay this year has to do with elections in Brazil.
702 #
703 # Unlike in the United States, elections in Brazil are 100% computerized and
704 # the results are known almost immediately. Yesterday, it was the first
705 # round of the elections when 115 million Brazilians voted for President,
706 # Governor, Senators, Federal Deputies, and State Deputies. Nobody is
707 # counting (or re-counting) votes anymore and we know there will be a second
708 # round for the Presidency and also for some Governors. The 2nd round will
709 # take place on October 27th.
710 #
711 # The reason why the DST will only begin November 3rd is that the thousands
712 # of electoral machines used cannot have their time changed, and since the
713 # Constitution says the elections must begin at 8:00 AM and end at 5:00 PM,
714 # the Government decided to postpone DST, instead of changing the Constitution
715 # (maybe, for the next elections, it will be possible to change the clock)...
716
717 # From Rodrigo Severo (2004-10-04):
718 # It's just the biannual change made necessary by the much hyped, supposedly
719 # modern Brazilian eletronic voting machines which, apparently, can't deal
720 # with a time change between the first and the second rounds of the elections.
721
722 # From Steffen Thorsen (2007-09-20):
723 # Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00:
724 # http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975
725
726 # From Paul Schulze (2008-06-24):
727 # ...by law number 11.662 of April 24, 2008 (published in the "Diario
728 # Oficial da Uniao"...) in Brazil there are changes in the timezones,
729 # effective today (00:00am at June 24, 2008) as follows:
730 #
731 # a) The timezone UTC+5 is e[x]tinguished, with all the Acre state and the
732 # part of the Amazonas state that had this timezone now being put to the
733 # timezone UTC+4
734 # b) The whole Para state now is put at timezone UTC+3, instead of just
735 # part of it, as was before.
736 #
737 # This change follows a proposal of senator Tiao Viana of Acre state, that
738 # proposed it due to concerns about open television channels displaying
739 # programs inappropriate to youths in the states that had the timezone
740 # UTC+5 too early in the night. In the occasion, some more corrections
741 # were proposed, trying to unify the timezones of any given state. This
742 # change modifies timezone rules defined in decree 2.784 of 18 June,
743 # 1913.
744
745 # From Rodrigo Severo (2008-06-24):
746 # Just correcting the URL:
747 # <a href="https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008">
748 # https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008
749 # </a>
750 #
751 # As a result of the above Decree I believe the America/Rio_Branco
752 # timezone shall be modified from UTC-5 to UTC-4 and a new timezone shall
753 # be created to represent the...west side of the Para State. I
754 # suggest this new timezone be called Santarem as the most
755 # important/populated city in the affected area.
756 #
757 # This new timezone would be the same as the Rio_Branco timezone up to
758 # the 2008/06/24 change which would be to UTC-3 instead of UTC-4.
759
760 # From Alex Krivenyshev (2008-06-24):
761 # This is a quick reference page for New and Old Brazil Time Zones map.
762 # <a href="http://www.worldtimezone.com/brazil-time-new-old.php">
763 # http://www.worldtimezone.com/brazil-time-new-old.php
764 # </a>
765 #
766 # - 4 time zones replaced by 3 time zones-eliminating time zone UTC- 05
767 # (state Acre and the part of the Amazonas will be UTC/GMT- 04) - western
768 # part of Par state is moving to one timezone UTC- 03 (from UTC -04).
769
770 # From Paul Eggert (2002-10-10):
771 # The official decrees referenced below are mostly taken from
772 # <a href="http://pcdsh01.on.br/DecHV.html">
773 # Decretos sobre o Horario de Verao no Brasil
774 # </a>.
775
776 # From Steffen Thorsen (2008-08-29):
777 # As announced by the government and many newspapers in Brazil late
778 # yesterday, Brazil will start DST on 2008-10-19 (need to change rule) and
779 # it will end on 2009-02-15 (current rule for Brazil is fine). Based on
780 # past years experience with the elections, there was a good chance that
781 # the start was postponed to November, but it did not happen this year.
782 #
783 # It has not yet been posted to http://pcdsh01.on.br/DecHV.html
784 #
785 # An official page about it:
786 # <a href="http://www.mme.gov.br/site/news/detail.do?newsId=16722">
787 # http://www.mme.gov.br/site/news/detail.do?newsId=16722
788 # </a>
789 # Note that this link does not always work directly, but must be accessed
790 # by going to
791 # <a href="http://www.mme.gov.br/first">
792 # http://www.mme.gov.br/first
793 # </a>
794 #
795 # One example link that works directly:
796 # <a href="http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54">
797 # http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54
798 # (Portuguese)
799 # </a>
800 #
801 # We have a written a short article about it as well:
802 # <a href="http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html">
803 # http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html
804 # </a>
805 #
806 # From Alexander Krivenyshev (2011-10-04):
807 # State Bahia will return to Daylight savings time this year after 8 years off.
808 # The announcement was made by Governor Jaques Wagner in an interview to a
809 # television station in Salvador.
810
811 # In Portuguese:
812 # <a href="http://g1.globo.com/bahia/noticia/2011/10/governador-jaques-wagner-confirma-horario-de-verao-na-bahia.html">
813 # http://g1.globo.com/bahia/noticia/2011/10/governador-jaques-wagner-confirma-horario-de-verao-na-bahia.html
814 # </a> and
815 # <a href="http://noticias.terra.com.br/brasil/noticias/0,,OI5390887-EI8139,00-Bahia+volta+a+ter+horario+de+verao+apos+oito+anos.html">
816 # http://noticias.terra.com.br/brasil/noticias/0,,OI5390887-EI8139,00-Bahia+volta+a+ter+horario+de+verao+apos+oito+anos.html
817 # </a>
818
819 # From Guilherme Bernardes Rodrigues (2011-10-07):
820 # There is news in the media, however there is still no decree about it.
821 # I just send a e-mail to Zulmira Brandao at
822 # <a href="http://pcdsh01.on.br/">http://pcdsh01.on.br/</a> the
823 # official agency about time in Brazil, and she confirmed that the old rule is
824 # still in force.
825
826 # From Guilherme Bernardes Rodrigues (2011-10-14)
827 # It's official, the President signed a decree that includes Bahia in summer
828 # time.
829 # [ and in a second message (same day): ]
830 # I found the decree.
831 #
832 # DECRETO No- 7.584, DE 13 DE OUTUBRO DE 2011
833 # Link :
834 # <a href="http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6">
835 # http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6
836 # </a>
837
838 # From Kelley Cook (2012-10-16):
839 # The governor of state of Bahia in Brazil announced on Thursday that
840 # due to public pressure, he is reversing the DST policy they implemented
841 # last year and will not be going to Summer Time on October 21st....
842 # http://www.correio24horas.com.br/r/artigo/apos-pressoes-wagner-suspende-horario-de-verao-na-bahia
843
844 # From Rodrigo Severo (2012-10-16):
845 # Tocantins state will have DST.
846 # http://noticias.terra.com.br/brasil/noticias/0,,OI6232536-EI306.html
847
848 # From Steffen Thorsen (2013-09-20):
849 # Tocantins in Brazil is very likely not to observe DST from October....
850 # http://conexaoto.com.br/2013/09/18/ministerio-confirma-que-tocantins-esta-fora-do-horario-de-verao-em-2013-mas-falta-publicacao-de-decreto
851 # We will keep this article updated when this is confirmed:
852 # http://www.timeanddate.com/news/time/brazil-starts-dst-2013.html
853
854 # From Steffen Thorsen (2013-10-17):
855 # http://www.timeanddate.com/news/time/acre-amazonas-change-time-zone.html
856 # Senator Jorge Viana announced that Acre will change time zone on November 10.
857 # He did not specify the time of the change, nor if western parts of Amazonas
858 # will change as well.
859 #
860 # From Paul Eggert (2013-10-17):
861 # For now, assume western Amazonas will change as well.
862
863 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
864 # Decree <a href="http://pcdsh01.on.br/HV20466.htm">20,466</a> (1931-10-01)
865 # Decree <a href="http://pcdsh01.on.br/HV21896.htm">21,896</a> (1932-01-10)
866 Rule Brazil 1931 only - Oct 3 11:00 1:00 S
867 Rule Brazil 1932 1933 - Apr 1 0:00 0 -
868 Rule Brazil 1932 only - Oct 3 0:00 1:00 S
869 # Decree <a href="http://pcdsh01.on.br/HV23195.htm">23,195</a> (1933-10-10)
870 # revoked DST.
871 # Decree <a href="http://pcdsh01.on.br/HV27496.htm">27,496</a> (1949-11-24)
872 # Decree <a href="http://pcdsh01.on.br/HV27998.htm">27,998</a> (1950-04-13)
873 Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S
874 Rule Brazil 1950 only - Apr 16 1:00 0 -
875 Rule Brazil 1951 1952 - Apr 1 0:00 0 -
876 # Decree <a href="http://pcdsh01.on.br/HV32308.htm">32,308</a> (1953-02-24)
877 Rule Brazil 1953 only - Mar 1 0:00 0 -
878 # Decree <a href="http://pcdsh01.on.br/HV34724.htm">34,724</a> (1953-11-30)
879 # revoked DST.
880 # Decree <a href="http://pcdsh01.on.br/HV52700.htm">52,700</a> (1963-10-18)
881 # established DST from 1963-10-23 00:00 to 1964-02-29 00:00
882 # in SP, RJ, GB, MG, ES, due to the prolongation of the drought.
883 # Decree <a href="http://pcdsh01.on.br/HV53071.htm">53,071</a> (1963-12-03)
884 # extended the above decree to all of the national territory on 12-09.
885 Rule Brazil 1963 only - Dec 9 0:00 1:00 S
886 # Decree <a href="http://pcdsh01.on.br/HV53604.htm">53,604</a> (1964-02-25)
887 # extended summer time by one day to 1964-03-01 00:00 (start of school).
888 Rule Brazil 1964 only - Mar 1 0:00 0 -
889 # Decree <a href="http://pcdsh01.on.br/HV55639.htm">55,639</a> (1965-01-27)
890 Rule Brazil 1965 only - Jan 31 0:00 1:00 S
891 Rule Brazil 1965 only - Mar 31 0:00 0 -
892 # Decree <a href="http://pcdsh01.on.br/HV57303.htm">57,303</a> (1965-11-22)
893 Rule Brazil 1965 only - Dec 1 0:00 1:00 S
894 # Decree <a href="http://pcdsh01.on.br/HV57843.htm">57,843</a> (1966-02-18)
895 Rule Brazil 1966 1968 - Mar 1 0:00 0 -
896 Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S
897 # Decree <a href="http://pcdsh01.on.br/HV63429.htm">63,429</a> (1968-10-15)
898 # revoked DST.
899 # Decree <a href="http://pcdsh01.on.br/HV91698.htm">91,698</a> (1985-09-27)
900 Rule Brazil 1985 only - Nov 2 0:00 1:00 S
901 # Decree 92,310 (1986-01-21)
902 # Decree 92,463 (1986-03-13)
903 Rule Brazil 1986 only - Mar 15 0:00 0 -
904 # Decree 93,316 (1986-10-01)
905 Rule Brazil 1986 only - Oct 25 0:00 1:00 S
906 Rule Brazil 1987 only - Feb 14 0:00 0 -
907 # Decree <a href="http://pcdsh01.on.br/HV94922.htm">94,922</a> (1987-09-22)
908 Rule Brazil 1987 only - Oct 25 0:00 1:00 S
909 Rule Brazil 1988 only - Feb 7 0:00 0 -
910 # Decree <a href="http://pcdsh01.on.br/HV96676.htm">96,676</a> (1988-09-12)
911 # except for the states of AC, AM, PA, RR, RO, and AP (then a territory)
912 Rule Brazil 1988 only - Oct 16 0:00 1:00 S
913 Rule Brazil 1989 only - Jan 29 0:00 0 -
914 # Decree <a href="http://pcdsh01.on.br/HV98077.htm">98,077</a> (1989-08-21)
915 # with the same exceptions
916 Rule Brazil 1989 only - Oct 15 0:00 1:00 S
917 Rule Brazil 1990 only - Feb 11 0:00 0 -
918 # Decree <a href="http://pcdsh01.on.br/HV99530.htm">99,530</a> (1990-09-17)
919 # adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF.
920 # Decree 99,629 (1990-10-19) adds BA, MT.
921 Rule Brazil 1990 only - Oct 21 0:00 1:00 S
922 Rule Brazil 1991 only - Feb 17 0:00 0 -
923 # <a href="http://pcdsh01.on.br/HV1991.htm">Unnumbered decree</a> (1991-09-25)
924 # adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF.
925 Rule Brazil 1991 only - Oct 20 0:00 1:00 S
926 Rule Brazil 1992 only - Feb 9 0:00 0 -
927 # <a href="http://pcdsh01.on.br/HV1992.htm">Unnumbered decree</a> (1992-10-16)
928 # adopted by same states.
929 Rule Brazil 1992 only - Oct 25 0:00 1:00 S
930 Rule Brazil 1993 only - Jan 31 0:00 0 -
931 # Decree <a href="http://pcdsh01.on.br/HV942.htm">942</a> (1993-09-28)
932 # adopted by same states, plus AM.
933 # Decree <a href="http://pcdsh01.on.br/HV1252.htm">1,252</a> (1994-09-22;
934 # web page corrected 2004-01-07) adopted by same states, minus AM.
935 # Decree <a href="http://pcdsh01.on.br/HV1636.htm">1,636</a> (1995-09-14)
936 # adopted by same states, plus MT and TO.
937 # Decree <a href="http://pcdsh01.on.br/HV1674.htm">1,674</a> (1995-10-13)
938 # adds AL, SE.
939 Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S
940 Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 -
941 Rule Brazil 1996 only - Feb 11 0:00 0 -
942 # Decree <a href="http://pcdsh01.on.br/HV2000.htm">2,000</a> (1996-09-04)
943 # adopted by same states, minus AL, SE.
944 Rule Brazil 1996 only - Oct 6 0:00 1:00 S
945 Rule Brazil 1997 only - Feb 16 0:00 0 -
946 # From Daniel C. Sobral (1998-02-12):
947 # In 1997, the DS began on October 6. The stated reason was that
948 # because international television networks ignored Brazil's policy on DS,
949 # they bought the wrong times on satellite for coverage of Pope's visit.
950 # This year, the ending date of DS was postponed to March 1
951 # to help dealing with the shortages of electric power.
952 #
953 # Decree 2,317 (1997-09-04), adopted by same states.
954 Rule Brazil 1997 only - Oct 6 0:00 1:00 S
955 # Decree <a href="http://pcdsh01.on.br/figuras/HV2495.JPG">2,495</a>
956 # (1998-02-10)
957 Rule Brazil 1998 only - Mar 1 0:00 0 -
958 # Decree <a href="http://pcdsh01.on.br/figuras/Hv98.jpg">2,780</a> (1998-09-11)
959 # adopted by the same states as before.
960 Rule Brazil 1998 only - Oct 11 0:00 1:00 S
961 Rule Brazil 1999 only - Feb 21 0:00 0 -
962 # Decree <a href="http://pcdsh01.on.br/figuras/HV3150.gif">3,150</a>
963 # (1999-08-23) adopted by same states.
964 # Decree <a href="http://pcdsh01.on.br/DecHV99.gif">3,188</a> (1999-09-30)
965 # adds SE, AL, PB, PE, RN, CE, PI, MA and RR.
966 Rule Brazil 1999 only - Oct 3 0:00 1:00 S
967 Rule Brazil 2000 only - Feb 27 0:00 0 -
968 # Decree <a href="http://pcdsh01.on.br/DEC3592.htm">3,592</a> (2000-09-06)
969 # adopted by the same states as before.
970 # Decree <a href="http://pcdsh01.on.br/Dec3630.jpg">3,630</a> (2000-10-13)
971 # repeals DST in PE and RR, effective 2000-10-15 00:00.
972 # Decree <a href="http://pcdsh01.on.br/Dec3632.jpg">3,632</a> (2000-10-17)
973 # repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00.
974 # Decree <a href="http://pcdsh01.on.br/figuras/HV3916.gif">3,916</a>
975 # (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE.
976 Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S
977 Rule Brazil 2001 2006 - Feb Sun>=15 0:00 0 -
978 # Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE.
979 # <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm">4,399</a>
980 Rule Brazil 2002 only - Nov 3 0:00 1:00 S
981 # Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO.
982 # <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm">4,844</a>
983 Rule Brazil 2003 only - Oct 19 0:00 1:00 S
984 # Decree 5,223 (2004-10-01) reestablishes DST in MT.
985 # <a href="http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm">5,223</a>
986 Rule Brazil 2004 only - Nov 2 0:00 1:00 S
987 # Decree <a href="http://pcdsh01.on.br/DecHV5539.gif">5,539</a> (2005-09-19),
988 # adopted by the same states as before.
989 Rule Brazil 2005 only - Oct 16 0:00 1:00 S
990 # Decree <a href="http://pcdsh01.on.br/DecHV5920.gif">5,920</a> (2006-10-03),
991 # adopted by the same states as before.
992 Rule Brazil 2006 only - Nov 5 0:00 1:00 S
993 Rule Brazil 2007 only - Feb 25 0:00 0 -
994 # Decree <a href="http://pcdsh01.on.br/DecHV6212.gif">6,212</a> (2007-09-26),
995 # adopted by the same states as before.
996 Rule Brazil 2007 only - Oct Sun>=8 0:00 1:00 S
997 # From Frederico A. C. Neves (2008-09-10):
998 # According to this decree
999 # <a href="http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm">
1000 # http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm
1001 # </a>
1002 # [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the
1003 # 3rd Feb Sunday. There is an exception on the return date when this is
1004 # the Carnival Sunday then the return date will be the next Sunday...
1005 Rule Brazil 2008 max - Oct Sun>=15 0:00 1:00 S
1006 Rule Brazil 2008 2011 - Feb Sun>=15 0:00 0 -
1007 Rule Brazil 2012 only - Feb Sun>=22 0:00 0 -
1008 Rule Brazil 2013 2014 - Feb Sun>=15 0:00 0 -
1009 Rule Brazil 2015 only - Feb Sun>=22 0:00 0 -
1010 Rule Brazil 2016 2022 - Feb Sun>=15 0:00 0 -
1011 Rule Brazil 2023 only - Feb Sun>=22 0:00 0 -
1012 Rule Brazil 2024 2025 - Feb Sun>=15 0:00 0 -
1013 Rule Brazil 2026 only - Feb Sun>=22 0:00 0 -
1014 Rule Brazil 2027 2033 - Feb Sun>=15 0:00 0 -
1015 Rule Brazil 2034 only - Feb Sun>=22 0:00 0 -
1016 Rule Brazil 2035 2036 - Feb Sun>=15 0:00 0 -
1017 Rule Brazil 2037 only - Feb Sun>=22 0:00 0 -
1018 # From Arthur David Olson (2008-09-29):
1019 # The next is wrong in some years but is better than nothing.
1020 Rule Brazil 2038 max - Feb Sun>=15 0:00 0 -
1021
1022 # The latest ruleset listed above says that the following states observe DST:
1023 # DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP.
1024
1025 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1026 #
1027 # Fernando de Noronha (administratively part of PE)
1028 Zone America/Noronha -2:09:40 - LMT 1914
1029 -2:00 Brazil FN%sT 1990 Sep 17
1030 -2:00 - FNT 1999 Sep 30
1031 -2:00 Brazil FN%sT 2000 Oct 15
1032 -2:00 - FNT 2001 Sep 13
1033 -2:00 Brazil FN%sT 2002 Oct 1
1034 -2:00 - FNT
1035 # Other Atlantic islands have no permanent settlement.
1036 # These include Trindade and Martin Vaz (administratively part of ES),
1037 # Atol das Rocas (RN), and Penedos de Sao Pedro e Sao Paulo (PE).
1038 # Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01;
1039 # it also included the Penedos.
1040 #
1041 # Amapa (AP), east Para (PA)
1042 # East Para includes Belem, Maraba, Serra Norte, and Sao Felix do Xingu.
1043 # The division between east and west Para is the river Xingu.
1044 # In the north a very small part from the river Javary (now Jari I guess,
1045 # the border with Amapa) to the Amazon, then to the Xingu.
1046 Zone America/Belem -3:13:56 - LMT 1914
1047 -3:00 Brazil BR%sT 1988 Sep 12
1048 -3:00 - BRT
1049 #
1050 # west Para (PA)
1051 # West Para includes Altamira, Oribidos, Prainha, Oriximina, and Santarem.
1052 Zone America/Santarem -3:38:48 - LMT 1914
1053 -4:00 Brazil AM%sT 1988 Sep 12
1054 -4:00 - AMT 2008 Jun 24 00:00
1055 -3:00 - BRT
1056 #
1057 # Maranhao (MA), Piaui (PI), Ceara (CE), Rio Grande do Norte (RN),
1058 # Paraiba (PB)
1059 Zone America/Fortaleza -2:34:00 - LMT 1914
1060 -3:00 Brazil BR%sT 1990 Sep 17
1061 -3:00 - BRT 1999 Sep 30
1062 -3:00 Brazil BR%sT 2000 Oct 22
1063 -3:00 - BRT 2001 Sep 13
1064 -3:00 Brazil BR%sT 2002 Oct 1
1065 -3:00 - BRT
1066 #
1067 # Pernambuco (PE) (except Atlantic islands)
1068 Zone America/Recife -2:19:36 - LMT 1914
1069 -3:00 Brazil BR%sT 1990 Sep 17
1070 -3:00 - BRT 1999 Sep 30
1071 -3:00 Brazil BR%sT 2000 Oct 15
1072 -3:00 - BRT 2001 Sep 13
1073 -3:00 Brazil BR%sT 2002 Oct 1
1074 -3:00 - BRT
1075 #
1076 # Tocantins (TO)
1077 Zone America/Araguaina -3:12:48 - LMT 1914
1078 -3:00 Brazil BR%sT 1990 Sep 17
1085 # Alagoas (AL), Sergipe (SE)
1086 Zone America/Maceio -2:22:52 - LMT 1914
1087 -3:00 Brazil BR%sT 1990 Sep 17
1088 -3:00 - BRT 1995 Oct 13
1089 -3:00 Brazil BR%sT 1996 Sep 4
1090 -3:00 - BRT 1999 Sep 30
1091 -3:00 Brazil BR%sT 2000 Oct 22
1092 -3:00 - BRT 2001 Sep 13
1093 -3:00 Brazil BR%sT 2002 Oct 1
1094 -3:00 - BRT
1095 #
1096 # Bahia (BA)
1097 # There are too many Salvadors elsewhere, so use America/Bahia instead
1098 # of America/Salvador.
1099 Zone America/Bahia -2:34:04 - LMT 1914
1100 -3:00 Brazil BR%sT 2003 Sep 24
1101 -3:00 - BRT 2011 Oct 16
1102 -3:00 Brazil BR%sT 2012 Oct 21
1103 -3:00 - BRT
1104 #
1105 # Goias (GO), Distrito Federal (DF), Minas Gerais (MG),
1106 # Espirito Santo (ES), Rio de Janeiro (RJ), Sao Paulo (SP), Parana (PR),
1107 # Santa Catarina (SC), Rio Grande do Sul (RS)
1108 Zone America/Sao_Paulo -3:06:28 - LMT 1914
1109 -3:00 Brazil BR%sT 1963 Oct 23 00:00
1110 -3:00 1:00 BRST 1964
1111 -3:00 Brazil BR%sT
1112 #
1113 # Mato Grosso do Sul (MS)
1114 Zone America/Campo_Grande -3:38:28 - LMT 1914
1115 -4:00 Brazil AM%sT
1116 #
1117 # Mato Grosso (MT)
1118 Zone America/Cuiaba -3:44:20 - LMT 1914
1119 -4:00 Brazil AM%sT 2003 Sep 24
1120 -4:00 - AMT 2004 Oct 1
1121 -4:00 Brazil AM%sT
1122 #
1123 # Rondonia (RO)
1124 Zone America/Porto_Velho -4:15:36 - LMT 1914
1125 -4:00 Brazil AM%sT 1988 Sep 12
1126 -4:00 - AMT
1127 #
1128 # Roraima (RR)
1129 Zone America/Boa_Vista -4:02:40 - LMT 1914
1130 -4:00 Brazil AM%sT 1988 Sep 12
1131 -4:00 - AMT 1999 Sep 30
1132 -4:00 Brazil AM%sT 2000 Oct 15
1133 -4:00 - AMT
1134 #
1135 # east Amazonas (AM): Boca do Acre, Jutai, Manaus, Floriano Peixoto
1136 # The great circle line from Tabatinga to Porto Acre divides
1137 # east from west Amazonas.
1138 Zone America/Manaus -4:00:04 - LMT 1914
1139 -4:00 Brazil AM%sT 1988 Sep 12
1140 -4:00 - AMT 1993 Sep 28
1141 -4:00 Brazil AM%sT 1994 Sep 22
1142 -4:00 - AMT
1143 #
1144 # west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant,
1145 # Eirunepe, Envira, Ipixuna
1146 Zone America/Eirunepe -4:39:28 - LMT 1914
1147 -5:00 Brazil AC%sT 1988 Sep 12
1148 -5:00 - ACT 1993 Sep 28
1149 -5:00 Brazil AC%sT 1994 Sep 22
1150 -5:00 - ACT 2008 Jun 24 00:00
1151 -4:00 - AMT 2013 Nov 10
1152 -5:00 - ACT
1153 #
1154 # Acre (AC)
1155 Zone America/Rio_Branco -4:31:12 - LMT 1914
1156 -5:00 Brazil AC%sT 1988 Sep 12
1157 -5:00 - ACT 2008 Jun 24 00:00
1158 -4:00 - AMT 2013 Nov 10
1159 -5:00 - ACT
1160
1161 # Chile
1162
1163 # From Eduardo Krell (1995-10-19):
1164 # The law says to switch to DST at midnight [24:00] on the second SATURDAY
1165 # of October.... The law is the same for March and October.
1166 # (1998-09-29):
1167 # Because of the drought this year, the government decided to go into
1168 # DST earlier (saturday 9/26 at 24:00). This is a one-time change only ...
1169 # (unless there's another dry season next year, I guess).
1170
1171 # From Julio I. Pacheco Troncoso (1999-03-18):
1172 # Because of the same drought, the government decided to end DST later,
1173 # on April 3, (one-time change).
1174
1175 # From Oscar van Vlijmen (2006-10-08):
1176 # http://www.horaoficial.cl/cambio.htm
1177
1178 # From Jesper Norgaard Welen (2006-10-08):
1179 # I think that there are some obvious mistakes in the suggested link
1180 # from Oscar van Vlijmen,... for instance entry 66 says that GMT-4
1181 # ended 1990-09-12 while entry 67 only begins GMT-3 at 1990-09-15
1182 # (they should have been 1990-09-15 and 1990-09-16 respectively), but
1183 # anyhow it clears up some doubts too.
1184
1185 # From Paul Eggert (2006-12-27):
1186 # The following data for Chile and America/Santiago are from
1187 # <http://www.horaoficial.cl/horaof.htm> (2006-09-20), transcribed by
1188 # Jesper Norgaard Welen. The data for Pacific/Easter are from Shanks
1189 # & Pottenger, except with DST transitions after 1932 cloned from
1190 # America/Santiago. The pre-1980 Pacific/Easter data are dubious,
1191 # but we have no other source.
1192
1193 # From German Poo-Caaman~o (2008-03-03):
1194 # Due to drought, Chile extends Daylight Time in three weeks. This
1195 # is one-time change (Saturday 3/29 at 24:00 for America/Santiago
1196 # and Saturday 3/29 at 22:00 for Pacific/Easter)
1197 # The Supreme Decree is located at
1198 # <a href="http://www.shoa.cl/servicios/supremo316.pdf">
1199 # http://www.shoa.cl/servicios/supremo316.pdf
1200 # </a>
1201 # and the instructions for 2008 are located in:
1202 # <a href="http://www.horaoficial.cl/cambio.htm">
1203 # http://www.horaoficial.cl/cambio.htm
1204 # </a>.
1205
1206 # From Jose Miguel Garrido (2008-03-05):
1207 # ...
1208 # You could see the announces of the change on
1209 # <a href="http://www.shoa.cl/noticias/2008/04hora/hora.htm">
1210 # http://www.shoa.cl/noticias/2008/04hora/hora.htm
1211 # </a>.
1212
1213 # From Angel Chiang (2010-03-04):
1214 # Subject: DST in Chile exceptionally extended to 3 April due to earthquake
1215 # <a href="http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098">
1216 # http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098
1217 # </a>
1218 # (in Spanish, last paragraph).
1219 #
1220 # This is breaking news. There should be more information available later.
1221
1222 # From Arthur Daivd Olson (2010-03-06):
1223 # Angel Chiang's message confirmed by Julio Pacheco; Julio provided a patch.
1224
1225 # From Glenn Eychaner (2011-03-02): [geychaner@mac.com]
1226 # It appears that the Chilean government has decided to postpone the
1227 # change from summer time to winter time again, by three weeks to April
1228 # 2nd:
1229 # <a href="http://www.emol.com/noticias/nacional/detalle/detallenoticias.asp?idnoticia=467651">
1230 # http://www.emol.com/noticias/nacional/detalle/detallenoticias.asp?idnoticia=467651
1231 # </a>
1232 #
1233 # This is not yet reflected in the official "cambio de hora" site, but
1234 # probably will be soon:
1235 # <a href="http://www.horaoficial.cl/cambio.htm">
1236 # http://www.horaoficial.cl/cambio.htm
1237 # </a>
1238
1239 # From Arthur David Olson (2011-03-02):
1240 # The emol.com article mentions a water shortage as the cause of the
1241 # postponement, which may mean that it's not a permanent change.
1242
1243 # From Glenn Eychaner (2011-03-28):
1244 # The article:
1245 # <a href="http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E}">
1246 # http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E}
1247 # </a>
1248 #
1249 # In English:
1250 # Chile's clocks will go back an hour this year on the 7th of May instead
1251 # of this Saturday. They will go forward again the 3rd Saturday in
1252 # August, not in October as they have since 1968. This is a pilot plan
1253 # which will be reevaluated in 2012.
1254
1255 # From Mauricio Parada (2012-02-22), translated by Glenn Eychaner (2012-02-23):
1256 # As stated in the website of the Chilean Energy Ministry
1257 # http://www.minenergia.cl/ministerio/noticias/generales/gobierno-anuncia-fechas-de-cambio-de.html
1258 # The Chilean Government has decided to postpone the entrance into winter time
1259 # (to leave DST) from March 11 2012 to April 28th 2012. The decision has not
1260 # been yet formalized but it will within the next days.
1261 # Quote from the website communication:
1262 #
1263 # 6. For the year 2012, the dates of entry into winter time will be as follows:
1264 # a. Saturday April 28, 2012, clocks should go back 60 minutes; that is, at
1265 # 23:59:59, instead of passing to 0:00, the time should be adjusted to be 23:00
1266 # of the same day.
1267 # b. Saturday, September 1, 2012, clocks should go forward 60 minutes; that is,
1268 # at 23:59:59, instead of passing to 0:00, the time should be adjusted to be
1269 # 01:00 on September 2.
1270
1271 # From Steffen Thorsen (2013-02-15):
1272 # According to several news sources, Chile has extended DST this year,
1273 # they will end DST later and start DST earlier than planned. They
1274 # hope to save energy. The new end date is 2013-04-28 00:00 and new
1275 # start date is 2013-09-08 00:00....
1276 # http://www.gob.cl/informa/2013/02/15/gobierno-anuncia-fechas-de-cambio-de-hora-para-el-ano-2013.htm
1277
1278 # NOTE: ChileAQ rules for Antarctic bases are stored separately in the
1279 # 'antarctica' file.
1280
1281 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1282 Rule Chile 1927 1932 - Sep 1 0:00 1:00 S
1283 Rule Chile 1928 1932 - Apr 1 0:00 0 -
1284 Rule Chile 1942 only - Jun 1 4:00u 0 -
1285 Rule Chile 1942 only - Aug 1 5:00u 1:00 S
1286 Rule Chile 1946 only - Jul 15 4:00u 1:00 S
1287 Rule Chile 1946 only - Sep 1 3:00u 0:00 -
1288 Rule Chile 1947 only - Apr 1 4:00u 0 -
1289 Rule Chile 1968 only - Nov 3 4:00u 1:00 S
1290 Rule Chile 1969 only - Mar 30 3:00u 0 -
1291 Rule Chile 1969 only - Nov 23 4:00u 1:00 S
1292 Rule Chile 1970 only - Mar 29 3:00u 0 -
1293 Rule Chile 1971 only - Mar 14 3:00u 0 -
1294 Rule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 S
1295 Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 -
1296 Rule Chile 1973 only - Sep 30 4:00u 1:00 S
1297 Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 S
1314 Rule Chile 2008 only - Mar 30 3:00u 0 -
1315 Rule Chile 2009 only - Mar Sun>=9 3:00u 0 -
1316 Rule Chile 2010 only - Apr Sun>=1 3:00u 0 -
1317 Rule Chile 2011 only - May Sun>=2 3:00u 0 -
1318 Rule Chile 2011 only - Aug Sun>=16 4:00u 1:00 S
1319 Rule Chile 2012 max - Apr Sun>=23 3:00u 0 -
1320 Rule Chile 2012 max - Sep Sun>=2 4:00u 1:00 S
1321 # IATA SSIM anomalies: (1992-02) says 1992-03-14;
1322 # (1996-09) says 1998-03-08. Ignore these.
1323 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1324 Zone America/Santiago -4:42:46 - LMT 1890
1325 -4:42:46 - SMT 1910 # Santiago Mean Time
1326 -5:00 - CLT 1916 Jul 1 # Chile Time
1327 -4:42:46 - SMT 1918 Sep 1 # Santiago Mean Time
1328 -4:00 - CLT 1919 Jul 1 # Chile Time
1329 -4:42:46 - SMT 1927 Sep 1 # Santiago Mean Time
1330 -5:00 Chile CL%sT 1947 May 22 # Chile Time
1331 -4:00 Chile CL%sT
1332 Zone Pacific/Easter -7:17:44 - LMT 1890
1333 -7:17:28 - EMT 1932 Sep # Easter Mean Time
1334 -7:00 Chile EAS%sT 1982 Mar 13 21:00 # Easter I Time
1335 -6:00 Chile EAS%sT
1336 #
1337 # Sala y Gomez Island is like Pacific/Easter.
1338 # Other Chilean locations, including Juan Fernandez Is, San Ambrosio,
1339 # San Felix, and Antarctic bases, are like America/Santiago.
1340
1341 # Colombia
1342
1343 # Milne gives 4:56:16.4 for Bogota time in 1899; round to nearest. He writes,
1344 # "A variation of fifteen minutes in the public clocks of Bogota is not rare."
1345
1346 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1347 Rule CO 1992 only - May 3 0:00 1:00 S
1348 Rule CO 1993 only - Apr 4 0:00 0 -
1349 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1350 Zone America/Bogota -4:56:16 - LMT 1884 Mar 13
1351 -4:56:16 - BMT 1914 Nov 23 # Bogota Mean Time
1352 -5:00 CO CO%sT # Colombia Time
1353 # Malpelo, Providencia, San Andres
1354 # no information; probably like America/Bogota
1355
1356 # Curacao
1357
1358 # Milne gives 4:35:46.9 for Curacao mean time; round to nearest.
1359 #
1360 # From Paul Eggert (2006-03-22):
1361 # Shanks & Pottenger say that The Bottom and Philipsburg have been at
1362 # -4:00 since standard time was introduced on 1912-03-02; and that
1363 # Kralendijk and Rincon used Kralendijk Mean Time (-4:33:08) from
1364 # 1912-02-02 to 1965-01-01. The former is dubious, since S&P also say
1365 # Saba Island has been like Curacao.
1366 # This all predates our 1970 cutoff, though.
1367 #
1368 # By July 2007 Curacao and St Maarten are planned to become
1369 # associated states within the Netherlands, much like Aruba;
1370 # Bonaire, Saba and St Eustatius would become directly part of the
1371 # Netherlands as Kingdom Islands. This won't affect their time zones
1372 # though, as far as we know.
1373 #
1374 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1375 Zone America/Curacao -4:35:47 - LMT 1912 Feb 12 # Willemstad
1376 -4:30 - ANT 1965 # Netherlands Antilles Time
1377 -4:00 - AST
1378
1379 # From Arthur David Olson (2011-06-15):
1380 # use links for places with new iso3166 codes.
1381 # The name "Lower Prince's Quarter" is both longer than fourteen charaters
1382 # and contains an apostrophe; use "Lower_Princes" below.
1383
1384 Link America/Curacao America/Lower_Princes # Sint Maarten
1385 Link America/Curacao America/Kralendijk # Caribbean Netherlands
1386
1387 # Ecuador
1388 #
1389 # Milne says the Sentral and South American Telegraph Company used -5:24:15.
1390 #
1391 # From Paul Eggert (2007-03-04):
1392 # Apparently Ecuador had a failed experiment with DST in 1992.
1393 # <http://midena.gov.ec/content/view/1261/208/> (2007-02-27) and
1394 # <http://www.hoy.com.ec/NoticiaNue.asp?row_id=249856> (2006-11-06) both
1395 # talk about "hora Sixto". Leave this alone for now, as we have no data.
1396 #
1397 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1398 Zone America/Guayaquil -5:19:20 - LMT 1890
1399 -5:14:00 - QMT 1931 # Quito Mean Time
1400 -5:00 - ECT # Ecuador Time
1401 Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno
1402 -5:00 - ECT 1986
1403 -6:00 - GALT # Galapagos Time
1404
1405 # Falklands
1406
1407 # From Paul Eggert (2006-03-22):
1408 # Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except
1409 # the IATA gives 1996-09-08. Go with Shanks & Pottenger.
1410
1411 # From Falkland Islands Government Office, London (2001-01-22)
1412 # via Jesper Norgaard:
1413 # ... the clocks revert back to Local Mean Time at 2 am on Sunday 15
1414 # April 2001 and advance one hour to summer time at 2 am on Sunday 2
1415 # September. It is anticipated that the clocks will revert back at 2
1416 # am on Sunday 21 April 2002 and advance to summer time at 2 am on
1417 # Sunday 1 September.
1418
1419 # From Rives McDow (2001-02-13):
1420 #
1421 # I have communicated several times with people there, and the last
1422 # time I had communications that was helpful was in 1998. Here is
1423 # what was said then:
1424 #
1425 # "The general rule was that Stanley used daylight saving and the Camp
1426 # did not. However for various reasons many people in the Camp have
1427 # started to use daylight saving (known locally as 'Stanley Time')
1428 # There is no rule as to who uses daylight saving - it is a matter of
1429 # personal choice and so it is impossible to draw a map showing who
1430 # uses it and who does not. Any list would be out of date as soon as
1431 # it was produced. This year daylight saving ended on April 18/19th
1432 # and started again on September 12/13th. I do not know what the rule
1441 # Falklands do not use DST. I have found in my communications there
1442 # that these areas are on the western half of East Falkland and all of
1443 # West Falkland. Stanley is the only place that consistently observes
1444 # DST. Again, as in other places in the world, the farmers don't like
1445 # it. West Falkland is almost entirely sheep farmers.
1446 #
1447 # I know one lady there that keeps a list of which farm keeps DST and
1448 # which doesn't each year. She runs a shop in Stanley, and says that
1449 # the list changes each year. She uses it to communicate to her
1450 # customers, catching them when they are home for lunch or dinner.
1451
1452 # From Paul Eggert (2001-03-05):
1453 # For now, we'll just record the time in Stanley, since we have no
1454 # better info.
1455
1456 # From Steffen Thorsen (2011-04-01):
1457 # The Falkland Islands will not turn back clocks this winter, but stay on
1458 # daylight saving time.
1459 #
1460 # One source:
1461 # <a href="http://www.falklandnews.com/public/story.cfm?get=5914&source=3">
1462 # http://www.falklandnews.com/public/story.cfm?get=5914&source=3
1463 # </a>
1464 #
1465 # We have gotten this confirmed by a clerk of the legislative assembly:
1466 # Normally the clocks revert to Local Mean Time (UTC/GMT -4 hours) on the
1467 # third Sunday of April at 0200hrs and advance to Summer Time (UTC/GMT -3
1468 # hours) on the first Sunday of September at 0200hrs.
1469 #
1470 # IMPORTANT NOTE: During 2011, on a trial basis, the Falkland Islands
1471 # will not revert to local mean time, but clocks will remain on Summer
1472 # time (UTC/GMT - 3 hours) throughout the whole of 2011. Any long term
1473 # change to local time following the trial period will be notified.
1474 #
1475 # From Andrew Newman (2012-02-24)
1476 # A letter from Justin McPhee, Chief Executive,
1477 # Cable & Wireless Falkland Islands (dated 2012-02-22)
1478 # states...
1479 # The current Atlantic/Stanley entry under South America expects the
1480 # clocks to go back to standard Falklands Time (FKT) on the 15th April.
1481 # The database entry states that in 2011 Stanley was staying on fixed
1482 # summer time on a trial basis only. FIG need to contact IANA and/or
1483 # the maintainers of the database to inform them we're adopting
1487 # until advised differently (to apply for 2012 and beyond, after the 2011
1488 # experiment was apparently successful.)
1489 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1490 Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S
1491 Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 -
1492 Rule Falk 1939 only - Oct 1 0:00 1:00 S
1493 Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S
1494 Rule Falk 1943 only - Jan 1 0:00 0 -
1495 Rule Falk 1983 only - Sep lastSun 0:00 1:00 S
1496 Rule Falk 1984 1985 - Apr lastSun 0:00 0 -
1497 Rule Falk 1984 only - Sep 16 0:00 1:00 S
1498 Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S
1499 Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 -
1500 Rule Falk 2001 2010 - Apr Sun>=15 2:00 0 -
1501 Rule Falk 2001 2010 - Sep Sun>=1 2:00 1:00 S
1502 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1503 Zone Atlantic/Stanley -3:51:24 - LMT 1890
1504 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time
1505 -4:00 Falk FK%sT 1983 May # Falkland Is Time
1506 -3:00 Falk FK%sT 1985 Sep 15
1507 -4:00 Falk FK%sT 2010 Sep 5 02:00
1508 -3:00 - FKST
1509
1510 # French Guiana
1511 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1512 Zone America/Cayenne -3:29:20 - LMT 1911 Jul
1513 -4:00 - GFT 1967 Oct # French Guiana Time
1514 -3:00 - GFT
1515
1516 # Guyana
1517 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1518 Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown
1519 -3:45 - GBGT 1966 May 26 # Br Guiana Time
1520 -3:45 - GYT 1975 Jul 31 # Guyana Time
1521 -3:00 - GYT 1991
1522 # IATA SSIM (1996-06) says -4:00. Assume a 1991 switch.
1523 -4:00 - GYT
1524
1525 # Paraguay
1526 #
1527 # From Paul Eggert (2006-03-22):
1528 # Shanks & Pottenger say that spring transitions are from 01:00 -> 02:00,
1529 # and autumn transitions are from 00:00 -> 23:00. Go with pre-1999
1530 # editions of Shanks, and with the IATA, who say transitions occur at 00:00.
1531 #
1532 # From Waldemar Villamayor-Venialbo (2013-09-20):
1533 # No time of the day is established for the adjustment, so people normally
1534 # adjust their clocks at 0 hour of the given dates.
1535 #
1536 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1537 Rule Para 1975 1988 - Oct 1 0:00 1:00 S
1538 Rule Para 1975 1978 - Mar 1 0:00 0 -
1539 Rule Para 1979 1991 - Apr 1 0:00 0 -
1540 Rule Para 1989 only - Oct 22 0:00 1:00 S
1541 Rule Para 1990 only - Oct 1 0:00 1:00 S
1542 Rule Para 1991 only - Oct 6 0:00 1:00 S
1543 Rule Para 1992 only - Mar 1 0:00 0 -
1544 Rule Para 1992 only - Oct 5 0:00 1:00 S
1545 Rule Para 1993 only - Mar 31 0:00 0 -
1546 Rule Para 1993 1995 - Oct 1 0:00 1:00 S
1547 Rule Para 1994 1995 - Feb lastSun 0:00 0 -
1548 Rule Para 1996 only - Mar 1 0:00 0 -
1549 # IATA SSIM (2000-02) says 1999-10-10; ignore this for now.
1550 # From Steffen Thorsen (2000-10-02):
1551 # I have three independent reports that Paraguay changed to DST this Sunday
1552 # (10-01).
1553 #
1554 # Translated by Gwillim Law (2001-02-27) from
1555 # <a href="http://www.diarionoticias.com.py/011000/nacional/naciona1.htm">
1556 # Noticias, a daily paper in Asuncion, Paraguay (2000-10-01)
1557 # </a>:
1558 # Starting at 0:00 today, the clock will be set forward 60 minutes, in
1559 # fulfillment of Decree No. 7,273 of the Executive Power.... The time change
1560 # system has been operating for several years. Formerly there was a separate
1561 # decree each year; the new law has the same effect, but permanently. Every
1562 # year, the time will change on the first Sunday of October; likewise, the
1563 # clock will be set back on the first Sunday of March.
1564 #
1565 Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S
1566 # IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger.
1567 Rule Para 1997 only - Feb lastSun 0:00 0 -
1568 # Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but
1569 # (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27).
1570 Rule Para 1998 2001 - Mar Sun>=1 0:00 0 -
1571 # From Rives McDow (2002-02-28):
1572 # A decree was issued in Paraguay (no. 16350) on 2002-02-26 that changed the
1573 # dst method to be from the first Sunday in September to the first Sunday in
1574 # April.
1575 Rule Para 2002 2004 - Apr Sun>=1 0:00 0 -
1576 Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 S
1577 #
1578 # From Jesper Norgaard Welen (2005-01-02):
1579 # There are several sources that claim that Paraguay made
1580 # a timezone rule change in autumn 2004.
1581 # From Steffen Thorsen (2005-01-05):
1582 # Decree 1,867 (2004-03-05)
1583 # From Carlos Raul Perasso via Jesper Norgaard Welen (2006-10-13)
1584 # <http://www.presidencia.gov.py/decretos/D1867.pdf>
1585 Rule Para 2004 2009 - Oct Sun>=15 0:00 1:00 S
1586 Rule Para 2005 2009 - Mar Sun>=8 0:00 0 -
1587 # From Carlos Raul Perasso (2010-02-18):
1588 # By decree number 3958 issued yesterday (
1589 # <a href="http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf">
1590 # http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf
1591 # </a>
1592 # )
1593 # Paraguay changes its DST schedule, postponing the March rule to April and
1594 # modifying the October date. The decree reads:
1595 # ...
1596 # Art. 1. It is hereby established that from the second Sunday of the month of
1597 # April of this year (2010), the official time is to be set back 60 minutes,
1598 # and that on the first Sunday of the month of October, it is to be set
1599 # forward 60 minutes, in all the territory of the Paraguayan Republic.
1600 # ...
1601 Rule Para 2010 max - Oct Sun>=1 0:00 1:00 S
1602 Rule Para 2010 2012 - Apr Sun>=8 0:00 0 -
1603 #
1604 # From Steffen Thorsen (2013-03-07):
1605 # Paraguay will end DST on 2013-03-24 00:00....
1606 # http://www.ande.gov.py/interna.php?id=1075
1607 #
1608 # From Carlos Raul Perasso (2013-03-15):
1609 # The change in Paraguay is now final. Decree number 10780
1610 # http://www.presidencia.gov.py/uploads/pdf/presidencia-3b86ff4b691c79d4f5927ca964922ec74772ce857c02ca054a52a37b49afc7fb.pdf
1611 Rule Para 2013 max - Mar Sun>=22 0:00 0 -
1612
1613 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1614 Zone America/Asuncion -3:50:40 - LMT 1890
1615 -3:50:40 - AMT 1931 Oct 10 # Asuncion Mean Time
1616 -4:00 - PYT 1972 Oct # Paraguay Time
1617 -3:00 - PYT 1974 Apr
1618 -4:00 Para PY%sT
1619
1620 # Peru
1621 #
1622 # <a href="news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net">
1623 # From Evelyn C. Leeper via Mark Brader (2003-10-26):</a>
1624 # When we were in Peru in 1985-1986, they apparently switched over
1625 # sometime between December 29 and January 3 while we were on the Amazon.
1626 #
1627 # From Paul Eggert (2006-03-22):
1628 # Shanks & Pottenger don't have this transition. Assume 1986 was like 1987.
1629
1630 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1631 Rule Peru 1938 only - Jan 1 0:00 1:00 S
1632 Rule Peru 1938 only - Apr 1 0:00 0 -
1633 Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S
1634 Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 -
1635 Rule Peru 1986 1987 - Jan 1 0:00 1:00 S
1636 Rule Peru 1986 1987 - Apr 1 0:00 0 -
1637 Rule Peru 1990 only - Jan 1 0:00 1:00 S
1638 Rule Peru 1990 only - Apr 1 0:00 0 -
1639 # IATA is ambiguous for 1993/1995; go with Shanks & Pottenger.
1640 Rule Peru 1994 only - Jan 1 0:00 1:00 S
1641 Rule Peru 1994 only - Apr 1 0:00 0 -
1642 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1643 Zone America/Lima -5:08:12 - LMT 1890
1649 Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken
1650 -2:00 - GST # South Georgia Time
1651
1652 # South Sandwich Is
1653 # uninhabited; scientific personnel have wintered
1654
1655 # Suriname
1656 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1657 Zone America/Paramaribo -3:40:40 - LMT 1911
1658 -3:40:52 - PMT 1935 # Paramaribo Mean Time
1659 -3:40:36 - PMT 1945 Oct # The capital moved?
1660 -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time
1661 -3:30 - SRT 1984 Oct # Suriname Time
1662 -3:00 - SRT
1663
1664 # Trinidad and Tobago
1665 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1666 Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2
1667 -4:00 - AST
1668
1669 Link America/Port_of_Spain America/Anguilla
1670 Link America/Port_of_Spain America/Dominica
1671 Link America/Port_of_Spain America/Grenada
1672 Link America/Port_of_Spain America/Guadeloupe
1673 Link America/Port_of_Spain America/Marigot
1674 Link America/Port_of_Spain America/Montserrat
1675 Link America/Port_of_Spain America/St_Barthelemy
1676 Link America/Port_of_Spain America/St_Kitts
1677 Link America/Port_of_Spain America/St_Lucia
1678 Link America/Port_of_Spain America/St_Thomas
1679 Link America/Port_of_Spain America/St_Vincent
1680 Link America/Port_of_Spain America/Tortola
1681
1682 # Uruguay
1683 # From Paul Eggert (1993-11-18):
1684 # Uruguay wins the prize for the strangest peacetime manipulation of the rules.
1685 # From Shanks & Pottenger:
1686 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1687 # Whitman gives 1923 Oct 1; go with Shanks & Pottenger.
1688 Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS
1689 Rule Uruguay 1924 1926 - Apr 1 0:00 0 -
1690 Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS
1691 Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS
1692 # Shanks & Pottenger give 1935 Apr 1 0:00 & 1936 Mar 30 0:00; go with Whitman.
1693 Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 -
1694 Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS
1695 Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 -
1696 # Whitman gives 1937 Oct 3; go with Shanks & Pottenger.
1697 Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS
1698 # Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13,
1699 # and 1943 Apr 13 "to present time"; go with Shanks & Pottenger.
1700 Rule Uruguay 1941 only - Aug 1 0:00 0:30 HS
1714 Rule Uruguay 1972 only - Aug 15 0:00 0 -
1715 Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS
1716 Rule Uruguay 1974 only - Dec 22 0:00 1:00 S
1717 Rule Uruguay 1976 only - Oct 1 0:00 0 -
1718 Rule Uruguay 1977 only - Dec 4 0:00 1:00 S
1719 Rule Uruguay 1978 only - Apr 1 0:00 0 -
1720 Rule Uruguay 1979 only - Oct 1 0:00 1:00 S
1721 Rule Uruguay 1980 only - May 1 0:00 0 -
1722 Rule Uruguay 1987 only - Dec 14 0:00 1:00 S
1723 Rule Uruguay 1988 only - Mar 14 0:00 0 -
1724 Rule Uruguay 1988 only - Dec 11 0:00 1:00 S
1725 Rule Uruguay 1989 only - Mar 12 0:00 0 -
1726 Rule Uruguay 1989 only - Oct 29 0:00 1:00 S
1727 # Shanks & Pottenger say no DST was observed in 1990/1 and 1991/2,
1728 # and that 1992/3's DST was from 10-25 to 03-01. Go with IATA.
1729 Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 -
1730 Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S
1731 Rule Uruguay 1992 only - Oct 18 0:00 1:00 S
1732 Rule Uruguay 1993 only - Feb 28 0:00 0 -
1733 # From Eduardo Cota (2004-09-20):
1734 # The uruguayan government has decreed a change in the local time....
1735 # http://www.presidencia.gub.uy/decretos/2004091502.htm
1736 Rule Uruguay 2004 only - Sep 19 0:00 1:00 S
1737 # From Steffen Thorsen (2005-03-11):
1738 # Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to
1739 # save energy ... it was postponed two weeks....
1740 # http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm
1741 Rule Uruguay 2005 only - Mar 27 2:00 0 -
1742 # From Eduardo Cota (2005-09-27):
1743 # http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF
1744 # This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at
1745 # 02:00 local time, official time in Uruguay will be at GMT -2.
1746 Rule Uruguay 2005 only - Oct 9 2:00 1:00 S
1747 Rule Uruguay 2006 only - Mar 12 2:00 0 -
1748 # From Jesper Norgaard Welen (2006-09-06):
1749 # http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF
1750 Rule Uruguay 2006 max - Oct Sun>=1 2:00 1:00 S
1751 Rule Uruguay 2007 max - Mar Sun>=8 2:00 0 -
1752 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1753 Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28
1754 -3:44:44 - MMT 1920 May 1 # Montevideo MT
1755 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time
1756 -3:00 Uruguay UY%sT
1757
1758 # Venezuela
1759 #
1760 # From John Stainforth (2007-11-28):
1761 # ... the change for Venezuela originally expected for 2007-12-31 has
1762 # been brought forward to 2007-12-09. The official announcement was
1763 # published today in the "Gaceta Oficial de la Republica Bolivariana
1764 # de Venezuela, numero 38.819" (official document for all laws or
1765 # resolution publication)
1766 # http://www.globovision.com/news.php?nid=72208
1767
1768 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1769 Zone America/Caracas -4:27:44 - LMT 1890
1770 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time?
1771 -4:30 - VET 1965 # Venezuela Time
1772 -4:00 - VET 2007 Dec 9 03:00
1773 -4:30 - VET
|
1 # This file is in the public domain, so clarified as of
2 # 2009-05-17 by Arthur David Olson.
3
4 # This file 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@iana.org for general use in the future). For more, please see
7 # the file CONTRIBUTING in the tz distribution.
8
9 # From Paul Eggert (2006-03-22):
10 # A good source for time zone historical data outside the U.S. is
11 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
12 # San Diego: ACS Publications, Inc. (2003).
13 #
14 # For data circa 1899, a common source is:
15 # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94.
16 # http://www.jstor.org/stable/1774359
17 #
18 # Gwillim Law writes that a good source
19 # for recent time zone data is the International Air Transport
20 # Association's Standard Schedules Information Manual (IATA SSIM),
21 # published semiannually. Law sent in several helpful summaries
22 # of the IATA's data after 1990.
23 #
24 # Except where otherwise noted, Shanks & Pottenger is the source for
25 # entries through 1990, and IATA SSIM is the source for entries afterwards.
26 #
27 # Earlier editions of these tables used the North American style (e.g. ARST and
28 # ARDT for Argentine Standard and Daylight Time), but the following quote
29 # suggests that it's better to use European style (e.g. ART and ARST).
30 # I suggest the use of _Summer time_ instead of the more cumbersome
31 # _daylight-saving time_. _Summer time_ seems to be in general use
32 # in Europe and South America.
33 # -- E O Cutler, _New York Times_ (1937-02-14), quoted in
34 # H L Mencken, _The American Language: Supplement I_ (1960), p 466
35 #
36 # Earlier editions of these tables also used the North American style
37 # for time zones in Brazil, but this was incorrect, as Brazilians say
38 # "summer time". Reinaldo Goulart, a São Paulo businessman active in
39 # the railroad sector, writes (1999-07-06):
40 # The subject of time zones is currently a matter of discussion/debate in
41 # Brazil. Let's say that "the Brasília time" is considered the
42 # "official time" because Brasília is the capital city.
43 # The other three time zones are called "Brasília time "minus one" or
44 # "plus one" or "plus two". As far as I know there is no such
45 # name/designation as "Eastern Time" or "Central Time".
46 # So I invented the following (English-language) abbreviations for now.
47 # Corrections are welcome!
48 # std dst
49 # -2:00 FNT FNST Fernando de Noronha
50 # -3:00 BRT BRST Brasília
51 # -4:00 AMT AMST Amazon
52 # -5:00 ACT ACST Acre
53
54 ###############################################################################
55
56 ###############################################################################
57
58 # Argentina
59
60 # From Bob Devine (1988-01-28):
61 # Argentina: first Sunday in October to first Sunday in April since 1976.
62 # Double Summer time from 1969 to 1974. Switches at midnight.
63
64 # From U. S. Naval Observatory (1988-01-19):
65 # ARGENTINA 3 H BEHIND UTC
66
67 # From Hernan G. Otero (1995-06-26):
68 # I am sending modifications to the Argentine time zone table...
69 # AR was chosen because they are the ISO letters that represent Argentina.
70
71 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
72 Rule Arg 1930 only - Dec 1 0:00 1:00 S
73 Rule Arg 1931 only - Apr 1 0:00 0 -
74 Rule Arg 1931 only - Oct 15 0:00 1:00 S
75 Rule Arg 1932 1940 - Mar 1 0:00 0 -
76 Rule Arg 1932 1939 - Nov 1 0:00 1:00 S
77 Rule Arg 1940 only - Jul 1 0:00 1:00 S
78 Rule Arg 1941 only - Jun 15 0:00 0 -
79 Rule Arg 1941 only - Oct 15 0:00 1:00 S
80 Rule Arg 1943 only - Aug 1 0:00 0 -
81 Rule Arg 1943 only - Oct 15 0:00 1:00 S
82 Rule Arg 1946 only - Mar 1 0:00 0 -
83 Rule Arg 1946 only - Oct 1 0:00 1:00 S
84 Rule Arg 1963 only - Oct 1 0:00 0 -
85 Rule Arg 1963 only - Dec 15 0:00 1:00 S
86 Rule Arg 1964 1966 - Mar 1 0:00 0 -
87 Rule Arg 1964 1966 - Oct 15 0:00 1:00 S
88 Rule Arg 1967 only - Apr 2 0:00 0 -
89 Rule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 S
90 Rule Arg 1968 1969 - Apr Sun>=1 0:00 0 -
91 Rule Arg 1974 only - Jan 23 0:00 1:00 S
92 Rule Arg 1974 only - May 1 0:00 0 -
93 Rule Arg 1988 only - Dec 1 0:00 1:00 S
94 #
95 # From Hernan G. Otero (1995-06-26):
96 # These corrections were contributed by InterSoft Argentina S.A.,
97 # obtaining the data from the:
98 # Talleres de Hidrografía Naval Argentina
99 # (Argentine Naval Hydrography Institute)
100 Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 -
101 Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S
102 #
103 # From Hernan G. Otero (1995-06-26):
104 # From this moment on, the law that mandated the daylight saving
105 # time corrections was derogated and no more modifications
106 # to the time zones (for daylight saving) are now made.
107 #
108 # From Rives McDow (2000-01-10):
109 # On October 3, 1999, 0:00 local, Argentina implemented daylight savings time,
110 # which did not result in the switch of a time zone, as they stayed 9 hours
111 # from the International Date Line.
112 Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 S
113 # From Paul Eggert (2007-12-28):
114 # DST was set to expire on March 5, not March 3, but since it was converted
115 # to standard time on March 3 it's more convenient for us to pretend that
116 # it ended on March 3.
117 Rule Arg 2000 only - Mar 3 0:00 0 -
118 #
119 # From Peter Gradelski via Steffen Thorsen (2000-03-01):
120 # We just checked with our São Paulo office and they say the government of
121 # Argentina decided not to become one of the countries that go on or off DST.
122 # So Buenos Aires should be -3 hours from GMT at all times.
123 #
124 # From Fabián L. Arce Jofré (2000-04-04):
125 # The law that claimed DST for Argentina was derogated by President Fernando
126 # de la Rúa on March 2, 2000, because it would make people spend more energy
127 # in the winter time, rather than less. The change took effect on March 3.
128 #
129 # From Mariano Absatz (2001-06-06):
130 # one of the major newspapers here in Argentina said that the 1999
131 # Timezone Law (which never was effectively applied) will (would?) be
132 # in effect.... The article is at
133 # http://ar.clarin.com/diario/2001-06-06/e-01701.htm
134 # ... The Law itself is "Ley No 25155", sanctioned on 1999-08-25, enacted
135 # 1999-09-17, and published 1999-09-21. The official publication is at:
136 # http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF
137 # Regretfully, you have to subscribe (and pay) for the on-line version....
138 #
139 # (2001-06-12):
140 # the timezone for Argentina will not change next Sunday.
141 # Apparently it will do so on Sunday 24th....
142 # http://ar.clarin.com/diario/2001-06-12/s-03501.htm
143 #
144 # (2001-06-25):
145 # Last Friday (yes, the last working day before the date of the change), the
146 # Senate annulled the 1999 law that introduced the changes later postponed.
147 # http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm
148 # It remains the vote of the Deputies..., but it will be the same....
149 # This kind of things had always been done this way in Argentina.
150 # We are still -03:00 all year round in all of the country.
151 #
152 # From Steffen Thorsen (2007-12-21):
153 # A user (Leonardo Chaim) reported that Argentina will adopt DST....
154 # all of the country (all Zone-entries) are affected. News reports like
155 # http://www.lanacion.com.ar/opinion/nota.asp?nota_id=973037 indicate
156 # that Argentina will use DST next year as well, from October to
157 # March, although exact rules are not given.
158 #
159 # From Jesper Nørgaard Welen (2007-12-26)
160 # The last hurdle of Argentina DST is over, the proposal was approved in
161 # the lower chamber too (Diputados) with a vote 192 for and 2 against.
162 # By the way thanks to Mariano Absatz and Daniel Mario Vega for the link to
163 # the original scanned proposal, where the dates and the zero hours are
164 # clear and unambiguous...This is the article about final approval:
165 # http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996
166 #
167 # From Paul Eggert (2007-12-22):
168 # For dates after mid-2008, the following rules are my guesses and
169 # are quite possibly wrong, but are more likely than no DST at all.
170
171 # From Alexander Krivenyshev (2008-09-05):
172 # As per message from Carlos Alberto Fonseca Arauz (Nicaragua),
173 # Argentina will start DST on Sunday October 19, 2008.
174 #
175 # http://www.worldtimezone.com/dst_news/dst_news_argentina03.html
176 # http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish)
177
178 # From Rodrigo Severo (2008-10-06):
179 # Here is some info available at a Gentoo bug related to TZ on Argentina's DST:
180 # ...
181 # ------- Comment #1 from [jmdocile] 2008-10-06 16:28 0000 -------
182 # Hi, there is a problem with timezone-data-2008e and maybe with
183 # timezone-data-2008f
184 # Argentinian law [Number] 25.155 is no longer valid.
185 # http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm
186 # The new one is law [Number] 26.350
187 # http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm
188 # So there is no summer time in Argentina for now.
189
190 # From Mariano Absatz (2008-10-20):
191 # Decree 1693/2008 applies Law 26.350 for the summer 2008/2009 establishing DST
192 # in Argentina from 2008-10-19 until 2009-03-15.
193 # http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01
194 #
195
196 # Decree 1705/2008 excepting 12 Provinces from applying DST in the summer
197 # 2008/2009: Catamarca, La Rioja, Mendoza, Salta, San Juan, San Luis, La
198 # Pampa, Neuquén, Rio Negro, Chubut, Santa Cruz and Tierra del Fuego
199 # http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01
200 #
201 # Press release 235 dated Saturday October 18th, from the Government of the
202 # Province of Jujuy saying it will not apply DST either (even when it was not
203 # included in Decree 1705/2008).
204 # http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc
205
206 # From fullinet (2009-10-18):
207 # As announced in
208 # http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356
209 # (an official .gob.ar) under title: "Sin Cambio de Hora"
210 # (English: "No hour change").
211 #
212 # "Por el momento, el Gobierno Nacional resolvió no modificar la hora
213 # oficial, decisión que estaba en estudio para su implementación el
214 # domingo 18 de octubre. Desde el Ministerio de Planificación se anunció
215 # que la Argentina hoy, en estas condiciones meteorológicas, no necesita
216 # la modificación del huso horario, ya que 2009 nos encuentra con
217 # crecimiento en la producción y distribución energética."
218
219 Rule Arg 2007 only - Dec 30 0:00 1:00 S
220 Rule Arg 2008 2009 - Mar Sun>=15 0:00 0 -
221 Rule Arg 2008 only - Oct Sun>=15 0:00 1:00 S
222
223 # From Mariano Absatz (2004-05-21):
224 # Today it was officially published that the Province of Mendoza is changing
225 # its timezone this winter... starting tomorrow night....
226 # http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf
227 # From Paul Eggert (2004-05-24):
228 # It's Law No. 7,210. This change is due to a public power emergency, so for
229 # now we'll assume it's for this year only.
230 #
231 # From Paul Eggert (2014-08-09):
232 # Hora de verano para la República Argentina
233 # http://buenasiembra.com.ar/esoterismo/astrologia/hora-de-verano-de-la-republica-argentina-27.html
234 # says that standard time in Argentina from 1894-10-31
235 # to 1920-05-01 was -4:16:48.25. Go with this more-precise value
236 # over Shanks & Pottenger.
237 #
238 # From Mariano Absatz (2004-06-05):
239 # These media articles from a major newspaper mostly cover the current state:
240 # http://www.lanacion.com.ar/04/05/27/de_604825.asp
241 # http://www.lanacion.com.ar/04/05/28/de_605203.asp
242 #
243 # The following eight (8) provinces pulled clocks back to UTC-04:00 at
244 # midnight Monday May 31st. (that is, the night between 05/31 and 06/01).
245 # Apparently, all nine provinces would go back to UTC-03:00 at the same
246 # time in October 17th.
247 #
248 # Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz,
249 # Tierra del Fuego, Tucumán.
250 #
251 # From Mariano Absatz (2004-06-14):
252 # ... this weekend, the Province of Tucumán decided it'd go back to UTC-03:00
253 # yesterday midnight (that is, at 24:00 Saturday 12th), since the people's
254 # annoyance with the change is much higher than the power savings obtained....
255 #
256 # From Gwillim Law (2004-06-14):
257 # http://www.lanacion.com.ar/04/06/10/de_609078.asp ...
258 # "The time change in Tierra del Fuego was a conflicted decision from
259 # the start. The government had decreed that the measure would take
260 # effect on June 1, but a normative error forced the new time to begin
261 # three days earlier, from a Saturday to a Sunday....
262 # Our understanding was that the change was originally scheduled to take place
263 # on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other
264 # provinces). Sunday was May 30, only two days earlier. So the article
265 # contains a contradiction. I would give more credence to the Saturday/Sunday
266 # date than the "three days earlier" phrase, and conclude that Tierra del
267 # Fuego set its clocks back at 2004-05-30 00:00.
268 #
269 # From Steffen Thorsen (2004-10-05):
270 # The previous law 7210 which changed the province of Mendoza's time zone
271 # back in May have been modified slightly in a new law 7277, which set the
272 # new end date to 2004-09-26 (original date was 2004-10-17).
273 # http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf
274 #
275 # From Mariano Absatz (2004-10-05):
276 # San Juan changed from UTC-03:00 to UTC-04:00 at midnight between
277 # Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00
278 # at midnight between Saturday, July 24th and Sunday, July 25th....
279 # http://www.sanjuan.gov.ar/prensa/archivo/000329.html
280 # http://www.sanjuan.gov.ar/prensa/archivo/000426.html
281 # http://www.sanjuan.gov.ar/prensa/archivo/000441.html
282
283 # From Alex Krivenyshev (2008-01-17):
284 # Here are articles that Argentina Province San Luis is planning to end DST
285 # as earlier as upcoming Monday January 21, 2008 or February 2008:
286 #
287 # Provincia argentina retrasa reloj y marca diferencia con resto del país
288 # (Argentine Province delayed clock and mark difference with the rest of the
289 # country)
290 # http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel
291 #
292 # Es inminente que en San Luis atrasen una hora los relojes
293 # (It is imminent in San Luis clocks one hour delay)
294 # http://www.lagaceta.com.ar/nota/253414/Economia/Es-inminente-que-en-San-Luis-atrasen-una-hora-los-relojes.html
295 # http://www.worldtimezone.net/dst_news/dst_news_argentina02.html
296
297 # From Jesper Nørgaard Welen (2008-01-18):
298 # The page of the San Luis provincial government
299 # http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812
300 # confirms what Alex Krivenyshev has earlier sent to the tz
301 # emailing list about that San Luis plans to return to standard
302 # time much earlier than the rest of the country. It also
303 # confirms that upon request the provinces San Juan and Mendoza
304 # refused to follow San Luis in this change.
305 #
306 # The change is supposed to take place Monday the 21st at 0:00
307 # hours. As far as I understand it if this goes ahead, we need
308 # a new timezone for San Luis (although there are also documented
309 # independent changes in the southamerica file of San Luis in
310 # 1990 and 1991 which has not been confirmed).
311
312 # From Jesper Nørgaard Welen (2008-01-25):
313 # Unfortunately the below page has become defunct, about the San Luis
314 # time change. Perhaps because it now is part of a group of pages "Most
315 # important pages of 2008."
316 #
317 # You can use
318 # http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834
319 # instead it seems. Or use "Buscador" from the main page of the San Luis
320 # government, and fill in "huso" and click OK, and you will get 3 pages
321 # from which the first one is identical to the above.
322
323 # From Mariano Absatz (2008-01-28):
324 # I can confirm that the Province of San Luis (and so far only that
325 # province) decided to go back to UTC-3 effective midnight Jan 20th 2008
326 # (that is, Monday 21st at 0:00 is the time the clocks were delayed back
327 # 1 hour), and they intend to keep UTC-3 as their timezone all year round
328 # (that is, unless they change their mind any minute now).
329 #
330 # So we'll have to add yet another city to 'southamerica' (I think San
331 # Luis city is the mos populated city in the Province, so it'd be
332 # America/Argentina/San_Luis... of course I can't remember if San Luis's
333 # history of particular changes goes along with Mendoza or San Juan :-(
334 # (I only remember not being able to collect hard facts about San Luis
335 # back in 2004, when these provinces changed to UTC-4 for a few days, I
336 # mailed them personally and never got an answer).
337
338 # From Paul Eggert (2014-08-12):
339 # Unless otherwise specified, data entries are from Shanks & Pottenger through
340 # 1992, from the IATA otherwise. As noted below, Shanks & Pottenger say that
341 # America/Cordoba split into 6 subregions during 1991/1992, one of which
342 # was America/San_Luis, but we haven't verified this yet so for now we'll
343 # keep America/Cordoba a single region rather than splitting it into the
344 # other 5 subregions.
345
346 # From Mariano Absatz (2009-03-13):
347 # Yesterday (with our usual 2-day notice) the Province of San Luis
348 # decided that next Sunday instead of "staying" @utc-03:00 they will go
349 # to utc-04:00 until the second Saturday in October...
350 #
351 # The press release is at
352 # http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102
353 # (I couldn't find the decree, but www.sanluis.gov.ar
354 # is the official page for the Province Government.)
355 #
356 # There's also a note in only one of the major national papers ...
357 # http://www.lanacion.com.ar/nota.asp?nota_id=1107912
358 #
359 # The press release says [quick and dirty translation]:
360 # ... announced that next Sunday, at 00:00, Puntanos (the San Luis
361 # inhabitants) will have to turn back one hour their clocks
362 #
363 # Since then, San Luis will establish its own Province timezone. Thus,
364 # during 2009, this timezone change will run from 00:00 the third Sunday
365 # in March until 24:00 of the second Saturday in October.
366
367 # From Mariano Absatz (2009-10-16):
368 # ...the Province of San Luis is a case in itself.
369 #
370 # The Law at
371 # http://www.diputadossanluis.gov.ar/diputadosasp/paginas/verNorma.asp?NormaID=276
372 # is ambiguous because establishes a calendar from the 2nd Sunday in
373 # October at 0:00 thru the 2nd Saturday in March at 24:00 and the
374 # complement of that starting on the 2nd Sunday of March at 0:00 and
375 # ending on the 2nd Saturday of March at 24:00.
376 #
377 # This clearly breaks every time the 1st of March or October is a Sunday.
378 #
379 # IMHO, the "spirit of the Law" is to make the changes at 0:00 on the 2nd
380 # Sunday of October and March.
381 #
382 # The problem is that the changes in the rest of the Provinces that did
383 # change in 2007/2008, were made according to the Federal Law and Decrees
384 # that did so on the 3rd Sunday of October and March.
385 #
386 # In fact, San Luis actually switched from UTC-4 to UTC-3 last Sunday
387 # (October 11th) at 0:00.
388 #
389 # So I guess a new set of rules, besides "Arg", must be made and the last
390 # America/Argentina/San_Luis entries should change to use these...
391 #
392 # I'm enclosing a patch that does what I say... regretfully, the San Luis
393 # timezone must be called "WART/WARST" even when most of the time (like,
394 # right now) WARST == ART... that is, since last Sunday, all the country
395 # is using UTC-3, but in my patch, San Luis calls it "WARST" and the rest
396 # of the country calls it "ART".
397 # ...
398
399 # From Alexander Krivenyshev (2010-04-09):
400 # According to news reports from El Diario de la República Province San
401 # Luis, Argentina (standard time UTC-04) will keep Daylight Saving Time
402 # after April 11, 2010 - will continue to have same time as rest of
403 # Argentina (UTC-3) (no DST).
404 #
405 # Confirmaron la prórroga del huso horario de verano (Spanish)
406 # http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9
407 # or (some English translation):
408 # http://www.worldtimezone.com/dst_news/dst_news_argentina08.html
409
410 # From Mariano Absatz (2010-04-12):
411 # yes...I can confirm this...and given that San Luis keeps calling
412 # UTC-03:00 "summer time", we should't just let San Luis go back to "Arg"
413 # rules...San Luis is still using "Western ARgentina Time" and it got
414 # stuck on Summer daylight savings time even though the summer is over.
415
416 # From Paul Eggert (2013-09-05):
417 # Perhaps San Luis operates on the legal fiction that it is at UTC-4
418 # with perpetual summer time, but ordinary usage typically seems to
419 # just say it's at UTC-3; see, for example,
420 # http://es.wikipedia.org/wiki/Hora_oficial_argentina
421 # We've documented similar situations as being plain changes to
422 # standard time, so let's do that here too. This does not change UTC
423 # offsets, only tm_isdst and the time zone abbreviations. One minor
424 # plus is that this silences a zic complaint that there's no POSIX TZ
425 # setting for time stamps past 2038.
426
427 # From Paul Eggert (2013-02-21):
428 # Milne says Córdoba time was -4:16:48.2. Round to the nearest second.
429
430 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
431 #
432 # Buenos Aires (BA), Capital Federal (CF),
433 Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31
434 -4:16:48 - CMT 1920 May # Córdoba Mean Time
435 -4:00 - ART 1930 Dec
436 -4:00 Arg AR%sT 1969 Oct 5
437 -3:00 Arg AR%sT 1999 Oct 3
438 -4:00 Arg AR%sT 2000 Mar 3
439 -3:00 Arg AR%sT
440 #
441 # Córdoba (CB), Santa Fe (SF), Entre Ríos (ER), Corrientes (CN), Misiones (MN),
442 # Chaco (CC), Formosa (FM), Santiago del Estero (SE)
443 #
444 # Shanks & Pottenger also make the following claims, which we haven't verified:
445 # - Formosa switched to -3:00 on 1991-01-07.
446 # - Misiones switched to -3:00 on 1990-12-29.
447 # - Chaco switched to -3:00 on 1991-01-04.
448 # - Santiago del Estero switched to -4:00 on 1991-04-01,
449 # then to -3:00 on 1991-04-26.
450 #
451 Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31
452 -4:16:48 - CMT 1920 May
453 -4:00 - ART 1930 Dec
454 -4:00 Arg AR%sT 1969 Oct 5
455 -3:00 Arg AR%sT 1991 Mar 3
456 -4:00 - WART 1991 Oct 20
457 -3:00 Arg AR%sT 1999 Oct 3
458 -4:00 Arg AR%sT 2000 Mar 3
459 -3:00 Arg AR%sT
460 #
461 # Salta (SA), La Pampa (LP), Neuquén (NQ), Rio Negro (RN)
462 Zone America/Argentina/Salta -4:21:40 - LMT 1894 Oct 31
463 -4:16:48 - CMT 1920 May
464 -4:00 - ART 1930 Dec
465 -4:00 Arg AR%sT 1969 Oct 5
466 -3:00 Arg AR%sT 1991 Mar 3
467 -4:00 - WART 1991 Oct 20
468 -3:00 Arg AR%sT 1999 Oct 3
469 -4:00 Arg AR%sT 2000 Mar 3
470 -3:00 Arg AR%sT 2008 Oct 18
471 -3:00 - ART
472 #
473 # Tucumán (TM)
474 Zone America/Argentina/Tucuman -4:20:52 - 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 - ART 2004 Jun 1
483 -4:00 - WART 2004 Jun 13
484 -3:00 Arg AR%sT
485 #
486 # La Rioja (LR)
487 Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31
488 -4:16:48 - CMT 1920 May
489 -4:00 - ART 1930 Dec
490 -4:00 Arg AR%sT 1969 Oct 5
491 -3:00 Arg AR%sT 1991 Mar 1
492 -4:00 - WART 1991 May 7
493 -3:00 Arg AR%sT 1999 Oct 3
565
566 Zone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31
567 -4:16:48 - CMT 1920 May
568 -4:00 - ART 1930 Dec
569 -4:00 Arg AR%sT 1969 Oct 5
570 -3:00 Arg AR%sT 1990
571 -3:00 1:00 ARST 1990 Mar 14
572 -4:00 - WART 1990 Oct 15
573 -4:00 1:00 WARST 1991 Mar 1
574 -4:00 - WART 1991 Jun 1
575 -3:00 - ART 1999 Oct 3
576 -4:00 1:00 WARST 2000 Mar 3
577 -3:00 - ART 2004 May 31
578 -4:00 - WART 2004 Jul 25
579 -3:00 Arg AR%sT 2008 Jan 21
580 -4:00 SanLuis WAR%sT 2009 Oct 11
581 -3:00 - ART
582 #
583 # Santa Cruz (SC)
584 Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31
585 -4:16:48 - CMT 1920 May # Córdoba Mean Time
586 -4:00 - ART 1930 Dec
587 -4:00 Arg AR%sT 1969 Oct 5
588 -3:00 Arg AR%sT 1999 Oct 3
589 -4:00 Arg AR%sT 2000 Mar 3
590 -3:00 - ART 2004 Jun 1
591 -4:00 - WART 2004 Jun 20
592 -3:00 Arg AR%sT 2008 Oct 18
593 -3:00 - ART
594 #
595 # Tierra del Fuego, Antártida e Islas del Atlántico Sur (TF)
596 Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31
597 -4:16:48 - CMT 1920 May # Córdoba Mean Time
598 -4:00 - ART 1930 Dec
599 -4:00 Arg AR%sT 1969 Oct 5
600 -3:00 Arg AR%sT 1999 Oct 3
601 -4:00 Arg AR%sT 2000 Mar 3
602 -3:00 - ART 2004 May 30
603 -4:00 - WART 2004 Jun 20
604 -3:00 Arg AR%sT 2008 Oct 18
605 -3:00 - ART
606
607 # Aruba
608 Link America/Curacao America/Aruba
609
610 # Bolivia
611 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
612 Zone America/La_Paz -4:32:36 - LMT 1890
613 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT
614 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST
615 -4:00 - BOT # Bolivia Time
616
617 # Brazil
618
619 # From Paul Eggert (1993-11-18):
620 # The mayor of Rio recently attempted to change the time zone rules
621 # just in his city, in order to leave more summer time for the tourist trade.
622 # The rule change lasted only part of the day;
623 # the federal government refused to follow the city's rules, and business
624 # was in a chaos, so the mayor backed down that afternoon.
625
626 # From IATA SSIM (1996-02):
627 # _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS),
628 # Santa Catarina (SC), Paraná (PR), São Paulo (SP), Rio de Janeiro (RJ),
629 # Espírito Santo (ES), Minas Gerais (MG), Bahia (BA), Goiás (GO),
630 # Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL].
631 # [The last three states are new to this issue of the IATA SSIM.]
632
633 # From Gwillim Law (1996-10-07):
634 # Geography, history (Tocantins was part of Goiás until 1989), and other
635 # sources of time zone information lead me to believe that AL, SE, and TO were
636 # always in BR1, and so the only change was whether or not they observed DST....
637 # The earliest issue of the SSIM I have is 2/91. Each issue from then until
638 # 9/95 says that DST is observed only in the ten states I quoted from 9/95,
639 # along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2
640 # (UTC-4).... The other two time zones given for Brazil are BR3, which is
641 # UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is
642 # UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's
643 # become part of the state of Pernambuco). The boundary between BR1 and BR2
644 # has never been clearly stated. They've simply been called East and West.
645 # However, some conclusions can be drawn from another IATA manual: the Airline
646 # Coding Directory, which lists close to 400 airports in Brazil. For each
647 # airport it gives a time zone which is coded to the SSIM. From that
648 # information, I'm led to conclude that the states of Amapá (AP), Ceará (CE),
649 # Maranhão (MA), Paraíba (PR), Pernambuco (PE), Piauí (PI), and Rio Grande do
650 # Norte (RN), and the eastern part of Pará (PA) are all in BR1 without DST.
651
652 # From Marcos Tadeu (1998-09-27):
653 # Brazilian official page <http://pcdsh01.on.br/verao1.html>
654
655 # From Jesper Nørgaard (2000-11-03):
656 # [For an official list of which regions in Brazil use which time zones, see:]
657 # http://pcdsh01.on.br/Fusbr.htm
658 # http://pcdsh01.on.br/Fusbrhv.htm
659
660 # From Celso Doria via David Madeo (2002-10-09):
661 # The reason for the delay this year has to do with elections in Brazil.
662 #
663 # Unlike in the United States, elections in Brazil are 100% computerized and
664 # the results are known almost immediately. Yesterday, it was the first
665 # round of the elections when 115 million Brazilians voted for President,
666 # Governor, Senators, Federal Deputies, and State Deputies. Nobody is
667 # counting (or re-counting) votes anymore and we know there will be a second
668 # round for the Presidency and also for some Governors. The 2nd round will
669 # take place on October 27th.
670 #
671 # The reason why the DST will only begin November 3rd is that the thousands
672 # of electoral machines used cannot have their time changed, and since the
673 # Constitution says the elections must begin at 8:00 AM and end at 5:00 PM,
674 # the Government decided to postpone DST, instead of changing the Constitution
675 # (maybe, for the next elections, it will be possible to change the clock)...
676
677 # From Rodrigo Severo (2004-10-04):
678 # It's just the biannual change made necessary by the much hyped, supposedly
679 # modern Brazilian eletronic voting machines which, apparently, can't deal
680 # with a time change between the first and the second rounds of the elections.
681
682 # From Steffen Thorsen (2007-09-20):
683 # Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00:
684 # http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975
685
686 # From Paul Schulze (2008-06-24):
687 # ...by law number 11.662 of April 24, 2008 (published in the "Diario
688 # Oficial da União"...) in Brazil there are changes in the timezones,
689 # effective today (00:00am at June 24, 2008) as follows:
690 #
691 # a) The timezone UTC+5 is extinguished, with all the Acre state and the
692 # part of the Amazonas state that had this timezone now being put to the
693 # timezone UTC+4
694 # b) The whole Pará state now is put at timezone UTC+3, instead of just
695 # part of it, as was before.
696 #
697 # This change follows a proposal of senator Tiao Viana of Acre state, that
698 # proposed it due to concerns about open television channels displaying
699 # programs inappropriate to youths in the states that had the timezone
700 # UTC+5 too early in the night. In the occasion, some more corrections
701 # were proposed, trying to unify the timezones of any given state. This
702 # change modifies timezone rules defined in decree 2.784 of 18 June,
703 # 1913.
704
705 # From Rodrigo Severo (2008-06-24):
706 # Just correcting the URL:
707 # https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008
708 #
709 # As a result of the above Decree I believe the America/Rio_Branco
710 # timezone shall be modified from UTC-5 to UTC-4 and a new timezone shall
711 # be created to represent the...west side of the Pará State. I
712 # suggest this new timezone be called Santarem as the most
713 # important/populated city in the affected area.
714 #
715 # This new timezone would be the same as the Rio_Branco timezone up to
716 # the 2008/06/24 change which would be to UTC-3 instead of UTC-4.
717
718 # From Alex Krivenyshev (2008-06-24):
719 # This is a quick reference page for New and Old Brazil Time Zones map.
720 # http://www.worldtimezone.com/brazil-time-new-old.php
721 #
722 # - 4 time zones replaced by 3 time zones - eliminating time zone UTC-05
723 # (state Acre and the part of the Amazonas will be UTC/GMT-04) - western
724 # part of Par state is moving to one timezone UTC-03 (from UTC-04).
725
726 # From Paul Eggert (2002-10-10):
727 # The official decrees referenced below are mostly taken from
728 # Decretos sobre o Horário de Verão no Brasil.
729 # http://pcdsh01.on.br/DecHV.html
730
731 # From Steffen Thorsen (2008-08-29):
732 # As announced by the government and many newspapers in Brazil late
733 # yesterday, Brazil will start DST on 2008-10-19 (need to change rule) and
734 # it will end on 2009-02-15 (current rule for Brazil is fine). Based on
735 # past years experience with the elections, there was a good chance that
736 # the start was postponed to November, but it did not happen this year.
737 #
738 # It has not yet been posted to http://pcdsh01.on.br/DecHV.html
739 #
740 # An official page about it:
741 # http://www.mme.gov.br/site/news/detail.do?newsId=16722
742 # Note that this link does not always work directly, but must be accessed
743 # by going to
744 # http://www.mme.gov.br/first
745 #
746 # One example link that works directly:
747 # http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54
748 # (Portuguese)
749 #
750 # We have a written a short article about it as well:
751 # http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html
752 #
753 # From Alexander Krivenyshev (2011-10-04):
754 # State Bahia will return to Daylight savings time this year after 8 years off.
755 # The announcement was made by Governor Jaques Wagner in an interview to a
756 # television station in Salvador.
757
758 # In Portuguese:
759 # http://g1.globo.com/bahia/noticia/2011/10/governador-jaques-wagner-confirma-horario-de-verao-na-bahia.html
760 # http://noticias.terra.com.br/brasil/noticias/0,,OI5390887-EI8139,00-Bahia+volta+a+ter+horario+de+verao+apos+oito+anos.html
761
762 # From Guilherme Bernardes Rodrigues (2011-10-07):
763 # There is news in the media, however there is still no decree about it.
764 # I just send a e-mail to Zulmira Brandao at http://pcdsh01.on.br/ the
765 # official agency about time in Brazil, and she confirmed that the old rule is
766 # still in force.
767
768 # From Guilherme Bernardes Rodrigues (2011-10-14)
769 # It's official, the President signed a decree that includes Bahia in summer
770 # time.
771 # [ and in a second message (same day): ]
772 # I found the decree.
773 #
774 # DECRETO No- 7.584, DE 13 DE OUTUBRO DE 2011
775 # Link :
776 # http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6
777
778 # From Kelley Cook (2012-10-16):
779 # The governor of state of Bahia in Brazil announced on Thursday that
780 # due to public pressure, he is reversing the DST policy they implemented
781 # last year and will not be going to Summer Time on October 21st....
782 # http://www.correio24horas.com.br/r/artigo/apos-pressoes-wagner-suspende-horario-de-verao-na-bahia
783
784 # From Rodrigo Severo (2012-10-16):
785 # Tocantins state will have DST.
786 # http://noticias.terra.com.br/brasil/noticias/0,,OI6232536-EI306.html
787
788 # From Steffen Thorsen (2013-09-20):
789 # Tocantins in Brazil is very likely not to observe DST from October....
790 # http://conexaoto.com.br/2013/09/18/ministerio-confirma-que-tocantins-esta-fora-do-horario-de-verao-em-2013-mas-falta-publicacao-de-decreto
791 # We will keep this article updated when this is confirmed:
792 # http://www.timeanddate.com/news/time/brazil-starts-dst-2013.html
793
794 # From Steffen Thorsen (2013-10-17):
795 # http://www.timeanddate.com/news/time/acre-amazonas-change-time-zone.html
796 # Senator Jorge Viana announced that Acre will change time zone on November 10.
797 # He did not specify the time of the change, nor if western parts of Amazonas
798 # will change as well.
799 #
800 # From Paul Eggert (2013-10-17):
801 # For now, assume western Amazonas will change as well.
802
803 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
804 # Decree 20,466 <http://pcdsh01.on.br/HV20466.htm> (1931-10-01)
805 # Decree 21,896 <http://pcdsh01.on.br/HV21896.htm> (1932-01-10)
806 Rule Brazil 1931 only - Oct 3 11:00 1:00 S
807 Rule Brazil 1932 1933 - Apr 1 0:00 0 -
808 Rule Brazil 1932 only - Oct 3 0:00 1:00 S
809 # Decree 23,195 <http://pcdsh01.on.br/HV23195.htm> (1933-10-10)
810 # revoked DST.
811 # Decree 27,496 <http://pcdsh01.on.br/HV27496.htm> (1949-11-24)
812 # Decree 27,998 <http://pcdsh01.on.br/HV27998.htm> (1950-04-13)
813 Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S
814 Rule Brazil 1950 only - Apr 16 1:00 0 -
815 Rule Brazil 1951 1952 - Apr 1 0:00 0 -
816 # Decree 32,308 <http://pcdsh01.on.br/HV32308.htm> (1953-02-24)
817 Rule Brazil 1953 only - Mar 1 0:00 0 -
818 # Decree 34,724 <http://pcdsh01.on.br/HV34724.htm> (1953-11-30)
819 # revoked DST.
820 # Decree 52,700 <http://pcdsh01.on.br/HV52700.htm> (1963-10-18)
821 # established DST from 1963-10-23 00:00 to 1964-02-29 00:00
822 # in SP, RJ, GB, MG, ES, due to the prolongation of the drought.
823 # Decree 53,071 <http://pcdsh01.on.br/HV53071.htm> (1963-12-03)
824 # extended the above decree to all of the national territory on 12-09.
825 Rule Brazil 1963 only - Dec 9 0:00 1:00 S
826 # Decree 53,604 <http://pcdsh01.on.br/HV53604.htm> (1964-02-25)
827 # extended summer time by one day to 1964-03-01 00:00 (start of school).
828 Rule Brazil 1964 only - Mar 1 0:00 0 -
829 # Decree 55,639 <http://pcdsh01.on.br/HV55639.htm> (1965-01-27)
830 Rule Brazil 1965 only - Jan 31 0:00 1:00 S
831 Rule Brazil 1965 only - Mar 31 0:00 0 -
832 # Decree 57,303 <http://pcdsh01.on.br/HV57303.htm> (1965-11-22)
833 Rule Brazil 1965 only - Dec 1 0:00 1:00 S
834 # Decree 57,843 <http://pcdsh01.on.br/HV57843.htm> (1966-02-18)
835 Rule Brazil 1966 1968 - Mar 1 0:00 0 -
836 Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S
837 # Decree 63,429 <http://pcdsh01.on.br/HV63429.htm> (1968-10-15)
838 # revoked DST.
839 # Decree 91,698 <http://pcdsh01.on.br/HV91698.htm> (1985-09-27)
840 Rule Brazil 1985 only - Nov 2 0:00 1:00 S
841 # Decree 92,310 (1986-01-21)
842 # Decree 92,463 (1986-03-13)
843 Rule Brazil 1986 only - Mar 15 0:00 0 -
844 # Decree 93,316 (1986-10-01)
845 Rule Brazil 1986 only - Oct 25 0:00 1:00 S
846 Rule Brazil 1987 only - Feb 14 0:00 0 -
847 # Decree 94,922 <http://pcdsh01.on.br/HV94922.htm> (1987-09-22)
848 Rule Brazil 1987 only - Oct 25 0:00 1:00 S
849 Rule Brazil 1988 only - Feb 7 0:00 0 -
850 # Decree 96,676 <http://pcdsh01.on.br/HV96676.htm> (1988-09-12)
851 # except for the states of AC, AM, PA, RR, RO, and AP (then a territory)
852 Rule Brazil 1988 only - Oct 16 0:00 1:00 S
853 Rule Brazil 1989 only - Jan 29 0:00 0 -
854 # Decree 98,077 <http://pcdsh01.on.br/HV98077.htm> (1989-08-21)
855 # with the same exceptions
856 Rule Brazil 1989 only - Oct 15 0:00 1:00 S
857 Rule Brazil 1990 only - Feb 11 0:00 0 -
858 # Decree 99,530 <http://pcdsh01.on.br/HV99530.htm> (1990-09-17)
859 # adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF.
860 # Decree 99,629 (1990-10-19) adds BA, MT.
861 Rule Brazil 1990 only - Oct 21 0:00 1:00 S
862 Rule Brazil 1991 only - Feb 17 0:00 0 -
863 # Unnumbered decree <http://pcdsh01.on.br/HV1991.htm> (1991-09-25)
864 # adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF.
865 Rule Brazil 1991 only - Oct 20 0:00 1:00 S
866 Rule Brazil 1992 only - Feb 9 0:00 0 -
867 # Unnumbered decree <http://pcdsh01.on.br/HV1992.htm> (1992-10-16)
868 # adopted by same states.
869 Rule Brazil 1992 only - Oct 25 0:00 1:00 S
870 Rule Brazil 1993 only - Jan 31 0:00 0 -
871 # Decree 942 <http://pcdsh01.on.br/HV942.htm> (1993-09-28)
872 # adopted by same states, plus AM.
873 # Decree 1,252 <http://pcdsh01.on.br/HV1252.htm> (1994-09-22;
874 # web page corrected 2004-01-07) adopted by same states, minus AM.
875 # Decree 1,636 <http://pcdsh01.on.br/HV1636.htm> (1995-09-14)
876 # adopted by same states, plus MT and TO.
877 # Decree 1,674 <http://pcdsh01.on.br/HV1674.htm> (1995-10-13)
878 # adds AL, SE.
879 Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S
880 Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 -
881 Rule Brazil 1996 only - Feb 11 0:00 0 -
882 # Decree 2,000 <http://pcdsh01.on.br/HV2000.htm> (1996-09-04)
883 # adopted by same states, minus AL, SE.
884 Rule Brazil 1996 only - Oct 6 0:00 1:00 S
885 Rule Brazil 1997 only - Feb 16 0:00 0 -
886 # From Daniel C. Sobral (1998-02-12):
887 # In 1997, the DS began on October 6. The stated reason was that
888 # because international television networks ignored Brazil's policy on DS,
889 # they bought the wrong times on satellite for coverage of Pope's visit.
890 # This year, the ending date of DS was postponed to March 1
891 # to help dealing with the shortages of electric power.
892 #
893 # Decree 2,317 (1997-09-04), adopted by same states.
894 Rule Brazil 1997 only - Oct 6 0:00 1:00 S
895 # Decree 2,495 <http://pcdsh01.on.br/figuras/HV2495.JPG>
896 # (1998-02-10)
897 Rule Brazil 1998 only - Mar 1 0:00 0 -
898 # Decree 2,780 <http://pcdsh01.on.br/figuras/Hv98.jpg> (1998-09-11)
899 # adopted by the same states as before.
900 Rule Brazil 1998 only - Oct 11 0:00 1:00 S
901 Rule Brazil 1999 only - Feb 21 0:00 0 -
902 # Decree 3,150 <http://pcdsh01.on.br/figuras/HV3150.gif>
903 # (1999-08-23) adopted by same states.
904 # Decree 3,188 <http://pcdsh01.on.br/DecHV99.gif> (1999-09-30)
905 # adds SE, AL, PB, PE, RN, CE, PI, MA and RR.
906 Rule Brazil 1999 only - Oct 3 0:00 1:00 S
907 Rule Brazil 2000 only - Feb 27 0:00 0 -
908 # Decree 3,592 <http://pcdsh01.on.br/DEC3592.htm> (2000-09-06)
909 # adopted by the same states as before.
910 # Decree 3,630 <http://pcdsh01.on.br/Dec3630.jpg> (2000-10-13)
911 # repeals DST in PE and RR, effective 2000-10-15 00:00.
912 # Decree 3,632 <http://pcdsh01.on.br/Dec3632.jpg> (2000-10-17)
913 # repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00.
914 # Decree 3,916 <http://pcdsh01.on.br/figuras/HV3916.gif>
915 # (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE.
916 Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S
917 Rule Brazil 2001 2006 - Feb Sun>=15 0:00 0 -
918 # Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE.
919 # 4,399 <http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm>
920 Rule Brazil 2002 only - Nov 3 0:00 1:00 S
921 # Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO.
922 # 4,844 <http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm>
923 Rule Brazil 2003 only - Oct 19 0:00 1:00 S
924 # Decree 5,223 (2004-10-01) reestablishes DST in MT.
925 # 5,223 <http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm>
926 Rule Brazil 2004 only - Nov 2 0:00 1:00 S
927 # Decree 5,539 <http://pcdsh01.on.br/DecHV5539.gif> (2005-09-19),
928 # adopted by the same states as before.
929 Rule Brazil 2005 only - Oct 16 0:00 1:00 S
930 # Decree 5,920 <http://pcdsh01.on.br/DecHV5920.gif> (2006-10-03),
931 # adopted by the same states as before.
932 Rule Brazil 2006 only - Nov 5 0:00 1:00 S
933 Rule Brazil 2007 only - Feb 25 0:00 0 -
934 # Decree 6,212 <http://pcdsh01.on.br/DecHV6212.gif> (2007-09-26),
935 # adopted by the same states as before.
936 Rule Brazil 2007 only - Oct Sun>=8 0:00 1:00 S
937 # From Frederico A. C. Neves (2008-09-10):
938 # According to this decree
939 # http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm
940 # [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the
941 # 3rd Feb Sunday. There is an exception on the return date when this is
942 # the Carnival Sunday then the return date will be the next Sunday...
943 Rule Brazil 2008 max - Oct Sun>=15 0:00 1:00 S
944 Rule Brazil 2008 2011 - Feb Sun>=15 0:00 0 -
945 Rule Brazil 2012 only - Feb Sun>=22 0:00 0 -
946 Rule Brazil 2013 2014 - Feb Sun>=15 0:00 0 -
947 Rule Brazil 2015 only - Feb Sun>=22 0:00 0 -
948 Rule Brazil 2016 2022 - Feb Sun>=15 0:00 0 -
949 Rule Brazil 2023 only - Feb Sun>=22 0:00 0 -
950 Rule Brazil 2024 2025 - Feb Sun>=15 0:00 0 -
951 Rule Brazil 2026 only - Feb Sun>=22 0:00 0 -
952 Rule Brazil 2027 2033 - Feb Sun>=15 0:00 0 -
953 Rule Brazil 2034 only - Feb Sun>=22 0:00 0 -
954 Rule Brazil 2035 2036 - Feb Sun>=15 0:00 0 -
955 Rule Brazil 2037 only - Feb Sun>=22 0:00 0 -
956 # From Arthur David Olson (2008-09-29):
957 # The next is wrong in some years but is better than nothing.
958 Rule Brazil 2038 max - Feb Sun>=15 0:00 0 -
959
960 # The latest ruleset listed above says that the following states observe DST:
961 # DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP.
962
963 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
964 #
965 # Fernando de Noronha (administratively part of PE)
966 Zone America/Noronha -2:09:40 - LMT 1914
967 -2:00 Brazil FN%sT 1990 Sep 17
968 -2:00 - FNT 1999 Sep 30
969 -2:00 Brazil FN%sT 2000 Oct 15
970 -2:00 - FNT 2001 Sep 13
971 -2:00 Brazil FN%sT 2002 Oct 1
972 -2:00 - FNT
973 # Other Atlantic islands have no permanent settlement.
974 # These include Trindade and Martim Vaz (administratively part of ES),
975 # Rocas Atoll (RN), and the St Peter and St Paul Archipelago (PE).
976 # Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01;
977 # it also included the Penedos.
978 #
979 # Amapá (AP), east Pará (PA)
980 # East Pará includes Belém, Marabá, Serra Norte, and São Félix do Xingu.
981 # The division between east and west Pará is the river Xingu.
982 # In the north a very small part from the river Javary (now Jari I guess,
983 # the border with Amapá) to the Amazon, then to the Xingu.
984 Zone America/Belem -3:13:56 - LMT 1914
985 -3:00 Brazil BR%sT 1988 Sep 12
986 -3:00 - BRT
987 #
988 # west Pará (PA)
989 # West Pará includes Altamira, Óbidos, Prainha, Oriximiná, and Santarém.
990 Zone America/Santarem -3:38:48 - LMT 1914
991 -4:00 Brazil AM%sT 1988 Sep 12
992 -4:00 - AMT 2008 Jun 24 0:00
993 -3:00 - BRT
994 #
995 # Maranhão (MA), Piauí (PI), Ceará (CE), Rio Grande do Norte (RN),
996 # Paraíba (PB)
997 Zone America/Fortaleza -2:34:00 - LMT 1914
998 -3:00 Brazil BR%sT 1990 Sep 17
999 -3:00 - BRT 1999 Sep 30
1000 -3:00 Brazil BR%sT 2000 Oct 22
1001 -3:00 - BRT 2001 Sep 13
1002 -3:00 Brazil BR%sT 2002 Oct 1
1003 -3:00 - BRT
1004 #
1005 # Pernambuco (PE) (except Atlantic islands)
1006 Zone America/Recife -2:19:36 - LMT 1914
1007 -3:00 Brazil BR%sT 1990 Sep 17
1008 -3:00 - BRT 1999 Sep 30
1009 -3:00 Brazil BR%sT 2000 Oct 15
1010 -3:00 - BRT 2001 Sep 13
1011 -3:00 Brazil BR%sT 2002 Oct 1
1012 -3:00 - BRT
1013 #
1014 # Tocantins (TO)
1015 Zone America/Araguaina -3:12:48 - LMT 1914
1016 -3:00 Brazil BR%sT 1990 Sep 17
1023 # Alagoas (AL), Sergipe (SE)
1024 Zone America/Maceio -2:22:52 - LMT 1914
1025 -3:00 Brazil BR%sT 1990 Sep 17
1026 -3:00 - BRT 1995 Oct 13
1027 -3:00 Brazil BR%sT 1996 Sep 4
1028 -3:00 - BRT 1999 Sep 30
1029 -3:00 Brazil BR%sT 2000 Oct 22
1030 -3:00 - BRT 2001 Sep 13
1031 -3:00 Brazil BR%sT 2002 Oct 1
1032 -3:00 - BRT
1033 #
1034 # Bahia (BA)
1035 # There are too many Salvadors elsewhere, so use America/Bahia instead
1036 # of America/Salvador.
1037 Zone America/Bahia -2:34:04 - LMT 1914
1038 -3:00 Brazil BR%sT 2003 Sep 24
1039 -3:00 - BRT 2011 Oct 16
1040 -3:00 Brazil BR%sT 2012 Oct 21
1041 -3:00 - BRT
1042 #
1043 # Goiás (GO), Distrito Federal (DF), Minas Gerais (MG),
1044 # Espírito Santo (ES), Rio de Janeiro (RJ), São Paulo (SP), Paraná (PR),
1045 # Santa Catarina (SC), Rio Grande do Sul (RS)
1046 Zone America/Sao_Paulo -3:06:28 - LMT 1914
1047 -3:00 Brazil BR%sT 1963 Oct 23 0:00
1048 -3:00 1:00 BRST 1964
1049 -3:00 Brazil BR%sT
1050 #
1051 # Mato Grosso do Sul (MS)
1052 Zone America/Campo_Grande -3:38:28 - LMT 1914
1053 -4:00 Brazil AM%sT
1054 #
1055 # Mato Grosso (MT)
1056 Zone America/Cuiaba -3:44:20 - LMT 1914
1057 -4:00 Brazil AM%sT 2003 Sep 24
1058 -4:00 - AMT 2004 Oct 1
1059 -4:00 Brazil AM%sT
1060 #
1061 # Rondônia (RO)
1062 Zone America/Porto_Velho -4:15:36 - LMT 1914
1063 -4:00 Brazil AM%sT 1988 Sep 12
1064 -4:00 - AMT
1065 #
1066 # Roraima (RR)
1067 Zone America/Boa_Vista -4:02:40 - LMT 1914
1068 -4:00 Brazil AM%sT 1988 Sep 12
1069 -4:00 - AMT 1999 Sep 30
1070 -4:00 Brazil AM%sT 2000 Oct 15
1071 -4:00 - AMT
1072 #
1073 # east Amazonas (AM): Boca do Acre, Jutaí, Manaus, Floriano Peixoto
1074 # The great circle line from Tabatinga to Porto Acre divides
1075 # east from west Amazonas.
1076 Zone America/Manaus -4:00:04 - LMT 1914
1077 -4:00 Brazil AM%sT 1988 Sep 12
1078 -4:00 - AMT 1993 Sep 28
1079 -4:00 Brazil AM%sT 1994 Sep 22
1080 -4:00 - AMT
1081 #
1082 # west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant,
1083 # Eirunepé, Envira, Ipixuna
1084 Zone America/Eirunepe -4:39:28 - LMT 1914
1085 -5:00 Brazil AC%sT 1988 Sep 12
1086 -5:00 - ACT 1993 Sep 28
1087 -5:00 Brazil AC%sT 1994 Sep 22
1088 -5:00 - ACT 2008 Jun 24 0:00
1089 -4:00 - AMT 2013 Nov 10
1090 -5:00 - ACT
1091 #
1092 # Acre (AC)
1093 Zone America/Rio_Branco -4:31:12 - LMT 1914
1094 -5:00 Brazil AC%sT 1988 Sep 12
1095 -5:00 - ACT 2008 Jun 24 0:00
1096 -4:00 - AMT 2013 Nov 10
1097 -5:00 - ACT
1098
1099 # Chile
1100
1101 # From Eduardo Krell (1995-10-19):
1102 # The law says to switch to DST at midnight [24:00] on the second SATURDAY
1103 # of October.... The law is the same for March and October.
1104 # (1998-09-29):
1105 # Because of the drought this year, the government decided to go into
1106 # DST earlier (saturday 9/26 at 24:00). This is a one-time change only ...
1107 # (unless there's another dry season next year, I guess).
1108
1109 # From Julio I. Pacheco Troncoso (1999-03-18):
1110 # Because of the same drought, the government decided to end DST later,
1111 # on April 3, (one-time change).
1112
1113 # From Oscar van Vlijmen (2006-10-08):
1114 # http://www.horaoficial.cl/cambio.htm
1115
1116 # From Jesper Nørgaard Welen (2006-10-08):
1117 # I think that there are some obvious mistakes in the suggested link
1118 # from Oscar van Vlijmen,... for instance entry 66 says that GMT-4
1119 # ended 1990-09-12 while entry 67 only begins GMT-3 at 1990-09-15
1120 # (they should have been 1990-09-15 and 1990-09-16 respectively), but
1121 # anyhow it clears up some doubts too.
1122
1123 # From Paul Eggert (2014-08-12):
1124 # The following data entries for Chile and America/Santiago are from
1125 # <http://www.horaoficial.cl/horaof.htm> (2006-09-20), transcribed by
1126 # Jesper Nørgaard Welen. The data entries for Pacific/Easter are from Shanks
1127 # & Pottenger, except with DST transitions after 1932 cloned from
1128 # America/Santiago. The pre-1980 Pacific/Easter data entries are dubious,
1129 # but we have no other source.
1130
1131 # From Germán Poo-Caamaño (2008-03-03):
1132 # Due to drought, Chile extends Daylight Time in three weeks. This
1133 # is one-time change (Saturday 3/29 at 24:00 for America/Santiago
1134 # and Saturday 3/29 at 22:00 for Pacific/Easter)
1135 # The Supreme Decree is located at
1136 # http://www.shoa.cl/servicios/supremo316.pdf
1137 # and the instructions for 2008 are located in:
1138 # http://www.horaoficial.cl/cambio.htm
1139
1140 # From José Miguel Garrido (2008-03-05):
1141 # ...
1142 # You could see the announces of the change on
1143 # http://www.shoa.cl/noticias/2008/04hora/hora.htm
1144
1145 # From Angel Chiang (2010-03-04):
1146 # Subject: DST in Chile exceptionally extended to 3 April due to earthquake
1147 # http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098
1148 # (in Spanish, last paragraph).
1149 #
1150 # This is breaking news. There should be more information available later.
1151
1152 # From Arthur David Olson (2010-03-06):
1153 # Angel Chiang's message confirmed by Julio Pacheco; Julio provided a patch.
1154
1155 # From Glenn Eychaner (2011-03-02):
1156 # It appears that the Chilean government has decided to postpone the
1157 # change from summer time to winter time again, by three weeks to April
1158 # 2nd:
1159 # http://www.emol.com/noticias/nacional/detalle/detallenoticias.asp?idnoticia=467651
1160 #
1161 # This is not yet reflected in the official "cambio de hora" site, but
1162 # probably will be soon:
1163 # http://www.horaoficial.cl/cambio.htm
1164
1165 # From Arthur David Olson (2011-03-02):
1166 # The emol.com article mentions a water shortage as the cause of the
1167 # postponement, which may mean that it's not a permanent change.
1168
1169 # From Glenn Eychaner (2011-03-28):
1170 # The article:
1171 # http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E}
1172 #
1173 # In English:
1174 # Chile's clocks will go back an hour this year on the 7th of May instead
1175 # of this Saturday. They will go forward again the 3rd Saturday in
1176 # August, not in October as they have since 1968. This is a pilot plan
1177 # which will be reevaluated in 2012.
1178
1179 # From Mauricio Parada (2012-02-22), translated by Glenn Eychaner (2012-02-23):
1180 # As stated in the website of the Chilean Energy Ministry
1181 # http://www.minenergia.cl/ministerio/noticias/generales/gobierno-anuncia-fechas-de-cambio-de.html
1182 # The Chilean Government has decided to postpone the entrance into winter time
1183 # (to leave DST) from March 11 2012 to April 28th 2012. The decision has not
1184 # been yet formalized but it will within the next days.
1185 # Quote from the website communication:
1186 #
1187 # 6. For the year 2012, the dates of entry into winter time will be as follows:
1188 # a. Saturday April 28, 2012, clocks should go back 60 minutes; that is, at
1189 # 23:59:59, instead of passing to 0:00, the time should be adjusted to be 23:00
1190 # of the same day.
1191 # b. Saturday, September 1, 2012, clocks should go forward 60 minutes; that is,
1192 # at 23:59:59, instead of passing to 0:00, the time should be adjusted to be
1193 # 01:00 on September 2.
1194
1195 # From Steffen Thorsen (2013-02-15):
1196 # According to several news sources, Chile has extended DST this year,
1197 # they will end DST later and start DST earlier than planned. They
1198 # hope to save energy. The new end date is 2013-04-28 00:00 and new
1199 # start date is 2013-09-08 00:00....
1200 # http://www.gob.cl/informa/2013/02/15/gobierno-anuncia-fechas-de-cambio-de-hora-para-el-ano-2013.htm
1201
1202 # From José Miguel Garrido (2014-02-19):
1203 # Today appeared in the Diario Oficial a decree amending the time change
1204 # dates to 2014.
1205 # DST End: last Saturday of April 2014 (Sun 27 Apr 2014 03:00 UTC)
1206 # DST Start: first Saturday of September 2014 (Sun 07 Sep 2014 04:00 UTC)
1207 # http://www.diariooficial.interior.gob.cl//media/2014/02/19/do-20140219.pdf
1208
1209 # NOTE: ChileAQ rules for Antarctic bases are stored separately in the
1210 # 'antarctica' file.
1211
1212 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1213 Rule Chile 1927 1932 - Sep 1 0:00 1:00 S
1214 Rule Chile 1928 1932 - Apr 1 0:00 0 -
1215 Rule Chile 1942 only - Jun 1 4:00u 0 -
1216 Rule Chile 1942 only - Aug 1 5:00u 1:00 S
1217 Rule Chile 1946 only - Jul 15 4:00u 1:00 S
1218 Rule Chile 1946 only - Sep 1 3:00u 0:00 -
1219 Rule Chile 1947 only - Apr 1 4:00u 0 -
1220 Rule Chile 1968 only - Nov 3 4:00u 1:00 S
1221 Rule Chile 1969 only - Mar 30 3:00u 0 -
1222 Rule Chile 1969 only - Nov 23 4:00u 1:00 S
1223 Rule Chile 1970 only - Mar 29 3:00u 0 -
1224 Rule Chile 1971 only - Mar 14 3:00u 0 -
1225 Rule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 S
1226 Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 -
1227 Rule Chile 1973 only - Sep 30 4:00u 1:00 S
1228 Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 S
1245 Rule Chile 2008 only - Mar 30 3:00u 0 -
1246 Rule Chile 2009 only - Mar Sun>=9 3:00u 0 -
1247 Rule Chile 2010 only - Apr Sun>=1 3:00u 0 -
1248 Rule Chile 2011 only - May Sun>=2 3:00u 0 -
1249 Rule Chile 2011 only - Aug Sun>=16 4:00u 1:00 S
1250 Rule Chile 2012 max - Apr Sun>=23 3:00u 0 -
1251 Rule Chile 2012 max - Sep Sun>=2 4:00u 1:00 S
1252 # IATA SSIM anomalies: (1992-02) says 1992-03-14;
1253 # (1996-09) says 1998-03-08. Ignore these.
1254 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1255 Zone America/Santiago -4:42:46 - LMT 1890
1256 -4:42:46 - SMT 1910 # Santiago Mean Time
1257 -5:00 - CLT 1916 Jul 1 # Chile Time
1258 -4:42:46 - SMT 1918 Sep 1 # Santiago Mean Time
1259 -4:00 - CLT 1919 Jul 1 # Chile Time
1260 -4:42:46 - SMT 1927 Sep 1 # Santiago Mean Time
1261 -5:00 Chile CL%sT 1947 May 22 # Chile Time
1262 -4:00 Chile CL%sT
1263 Zone Pacific/Easter -7:17:44 - LMT 1890
1264 -7:17:28 - EMT 1932 Sep # Easter Mean Time
1265 -7:00 Chile EAS%sT 1982 Mar 13 21:00 # Easter Time
1266 -6:00 Chile EAS%sT
1267 #
1268 # Salas y Gómez Island is uninhabited.
1269 # Other Chilean locations, including Juan Fernández Is, Desventuradas Is,
1270 # and Antarctic bases, are like America/Santiago.
1271
1272 # Colombia
1273
1274 # Milne gives 4:56:16.4 for Bogotá time in 1899; round to nearest. He writes,
1275 # "A variation of fifteen minutes in the public clocks of Bogota is not rare."
1276
1277 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1278 Rule CO 1992 only - May 3 0:00 1:00 S
1279 Rule CO 1993 only - Apr 4 0:00 0 -
1280 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1281 Zone America/Bogota -4:56:16 - LMT 1884 Mar 13
1282 -4:56:16 - BMT 1914 Nov 23 # Bogotá Mean Time
1283 -5:00 CO CO%sT # Colombia Time
1284 # Malpelo, Providencia, San Andres
1285 # no information; probably like America/Bogota
1286
1287 # Curaçao
1288
1289 # Milne gives 4:35:46.9 for Curaçao mean time; round to nearest.
1290 #
1291 # From Paul Eggert (2006-03-22):
1292 # Shanks & Pottenger say that The Bottom and Philipsburg have been at
1293 # -4:00 since standard time was introduced on 1912-03-02; and that
1294 # Kralendijk and Rincon used Kralendijk Mean Time (-4:33:08) from
1295 # 1912-02-02 to 1965-01-01. The former is dubious, since S&P also say
1296 # Saba Island has been like Curaçao.
1297 # This all predates our 1970 cutoff, though.
1298 #
1299 # By July 2007 Curaçao and St Maarten are planned to become
1300 # associated states within the Netherlands, much like Aruba;
1301 # Bonaire, Saba and St Eustatius would become directly part of the
1302 # Netherlands as Kingdom Islands. This won't affect their time zones
1303 # though, as far as we know.
1304 #
1305 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1306 Zone America/Curacao -4:35:47 - LMT 1912 Feb 12 # Willemstad
1307 -4:30 - ANT 1965 # Netherlands Antilles Time
1308 -4:00 - AST
1309
1310 # From Arthur David Olson (2011-06-15):
1311 # use links for places with new iso3166 codes.
1312 # The name "Lower Prince's Quarter" is both longer than fourteen characters
1313 # and contains an apostrophe; use "Lower_Princes" below.
1314
1315 Link America/Curacao America/Lower_Princes # Sint Maarten
1316 Link America/Curacao America/Kralendijk # Caribbean Netherlands
1317
1318 # Ecuador
1319 #
1320 # Milne says the Central and South American Telegraph Company used -5:24:15.
1321 #
1322 # From Paul Eggert (2007-03-04):
1323 # Apparently Ecuador had a failed experiment with DST in 1992.
1324 # <http://midena.gov.ec/content/view/1261/208/> (2007-02-27) and
1325 # <http://www.hoy.com.ec/NoticiaNue.asp?row_id=249856> (2006-11-06) both
1326 # talk about "hora Sixto". Leave this alone for now, as we have no data.
1327 #
1328 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1329 Zone America/Guayaquil -5:19:20 - LMT 1890
1330 -5:14:00 - QMT 1931 # Quito Mean Time
1331 -5:00 - ECT # Ecuador Time
1332 Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno
1333 -5:00 - ECT 1986
1334 -6:00 - GALT # Galápagos Time
1335
1336 # Falklands
1337
1338 # From Paul Eggert (2006-03-22):
1339 # Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except
1340 # the IATA gives 1996-09-08. Go with Shanks & Pottenger.
1341
1342 # From Falkland Islands Government Office, London (2001-01-22)
1343 # via Jesper Nørgaard:
1344 # ... the clocks revert back to Local Mean Time at 2 am on Sunday 15
1345 # April 2001 and advance one hour to summer time at 2 am on Sunday 2
1346 # September. It is anticipated that the clocks will revert back at 2
1347 # am on Sunday 21 April 2002 and advance to summer time at 2 am on
1348 # Sunday 1 September.
1349
1350 # From Rives McDow (2001-02-13):
1351 #
1352 # I have communicated several times with people there, and the last
1353 # time I had communications that was helpful was in 1998. Here is
1354 # what was said then:
1355 #
1356 # "The general rule was that Stanley used daylight saving and the Camp
1357 # did not. However for various reasons many people in the Camp have
1358 # started to use daylight saving (known locally as 'Stanley Time')
1359 # There is no rule as to who uses daylight saving - it is a matter of
1360 # personal choice and so it is impossible to draw a map showing who
1361 # uses it and who does not. Any list would be out of date as soon as
1362 # it was produced. This year daylight saving ended on April 18/19th
1363 # and started again on September 12/13th. I do not know what the rule
1372 # Falklands do not use DST. I have found in my communications there
1373 # that these areas are on the western half of East Falkland and all of
1374 # West Falkland. Stanley is the only place that consistently observes
1375 # DST. Again, as in other places in the world, the farmers don't like
1376 # it. West Falkland is almost entirely sheep farmers.
1377 #
1378 # I know one lady there that keeps a list of which farm keeps DST and
1379 # which doesn't each year. She runs a shop in Stanley, and says that
1380 # the list changes each year. She uses it to communicate to her
1381 # customers, catching them when they are home for lunch or dinner.
1382
1383 # From Paul Eggert (2001-03-05):
1384 # For now, we'll just record the time in Stanley, since we have no
1385 # better info.
1386
1387 # From Steffen Thorsen (2011-04-01):
1388 # The Falkland Islands will not turn back clocks this winter, but stay on
1389 # daylight saving time.
1390 #
1391 # One source:
1392 # http://www.falklandnews.com/public/story.cfm?get=5914&source=3
1393 #
1394 # We have gotten this confirmed by a clerk of the legislative assembly:
1395 # Normally the clocks revert to Local Mean Time (UTC/GMT -4 hours) on the
1396 # third Sunday of April at 0200hrs and advance to Summer Time (UTC/GMT -3
1397 # hours) on the first Sunday of September at 0200hrs.
1398 #
1399 # IMPORTANT NOTE: During 2011, on a trial basis, the Falkland Islands
1400 # will not revert to local mean time, but clocks will remain on Summer
1401 # time (UTC/GMT - 3 hours) throughout the whole of 2011. Any long term
1402 # change to local time following the trial period will be notified.
1403 #
1404 # From Andrew Newman (2012-02-24)
1405 # A letter from Justin McPhee, Chief Executive,
1406 # Cable & Wireless Falkland Islands (dated 2012-02-22)
1407 # states...
1408 # The current Atlantic/Stanley entry under South America expects the
1409 # clocks to go back to standard Falklands Time (FKT) on the 15th April.
1410 # The database entry states that in 2011 Stanley was staying on fixed
1411 # summer time on a trial basis only. FIG need to contact IANA and/or
1412 # the maintainers of the database to inform them we're adopting
1416 # until advised differently (to apply for 2012 and beyond, after the 2011
1417 # experiment was apparently successful.)
1418 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1419 Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S
1420 Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 -
1421 Rule Falk 1939 only - Oct 1 0:00 1:00 S
1422 Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S
1423 Rule Falk 1943 only - Jan 1 0:00 0 -
1424 Rule Falk 1983 only - Sep lastSun 0:00 1:00 S
1425 Rule Falk 1984 1985 - Apr lastSun 0:00 0 -
1426 Rule Falk 1984 only - Sep 16 0:00 1:00 S
1427 Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S
1428 Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 -
1429 Rule Falk 2001 2010 - Apr Sun>=15 2:00 0 -
1430 Rule Falk 2001 2010 - Sep Sun>=1 2:00 1:00 S
1431 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1432 Zone Atlantic/Stanley -3:51:24 - LMT 1890
1433 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time
1434 -4:00 Falk FK%sT 1983 May # Falkland Is Time
1435 -3:00 Falk FK%sT 1985 Sep 15
1436 -4:00 Falk FK%sT 2010 Sep 5 2:00
1437 -3:00 - FKST
1438
1439 # French Guiana
1440 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1441 Zone America/Cayenne -3:29:20 - LMT 1911 Jul
1442 -4:00 - GFT 1967 Oct # French Guiana Time
1443 -3:00 - GFT
1444
1445 # Guyana
1446 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1447 Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown
1448 -3:45 - GBGT 1966 May 26 # Br Guiana Time
1449 -3:45 - GYT 1975 Jul 31 # Guyana Time
1450 -3:00 - GYT 1991
1451 # IATA SSIM (1996-06) says -4:00. Assume a 1991 switch.
1452 -4:00 - GYT
1453
1454 # Paraguay
1455 #
1456 # From Paul Eggert (2006-03-22):
1457 # Shanks & Pottenger say that spring transitions are 01:00 -> 02:00,
1458 # and autumn transitions are 00:00 -> 23:00. Go with pre-1999
1459 # editions of Shanks, and with the IATA, who say transitions occur at 00:00.
1460 #
1461 # From Waldemar Villamayor-Venialbo (2013-09-20):
1462 # No time of the day is established for the adjustment, so people normally
1463 # adjust their clocks at 0 hour of the given dates.
1464 #
1465 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1466 Rule Para 1975 1988 - Oct 1 0:00 1:00 S
1467 Rule Para 1975 1978 - Mar 1 0:00 0 -
1468 Rule Para 1979 1991 - Apr 1 0:00 0 -
1469 Rule Para 1989 only - Oct 22 0:00 1:00 S
1470 Rule Para 1990 only - Oct 1 0:00 1:00 S
1471 Rule Para 1991 only - Oct 6 0:00 1:00 S
1472 Rule Para 1992 only - Mar 1 0:00 0 -
1473 Rule Para 1992 only - Oct 5 0:00 1:00 S
1474 Rule Para 1993 only - Mar 31 0:00 0 -
1475 Rule Para 1993 1995 - Oct 1 0:00 1:00 S
1476 Rule Para 1994 1995 - Feb lastSun 0:00 0 -
1477 Rule Para 1996 only - Mar 1 0:00 0 -
1478 # IATA SSIM (2000-02) says 1999-10-10; ignore this for now.
1479 # From Steffen Thorsen (2000-10-02):
1480 # I have three independent reports that Paraguay changed to DST this Sunday
1481 # (10-01).
1482 #
1483 # Translated by Gwillim Law (2001-02-27) from
1484 # Noticias, a daily paper in Asunción, Paraguay (2000-10-01):
1485 # http://www.diarionoticias.com.py/011000/nacional/naciona1.htm
1486 # Starting at 0:00 today, the clock will be set forward 60 minutes, in
1487 # fulfillment of Decree No. 7,273 of the Executive Power.... The time change
1488 # system has been operating for several years. Formerly there was a separate
1489 # decree each year; the new law has the same effect, but permanently. Every
1490 # year, the time will change on the first Sunday of October; likewise, the
1491 # clock will be set back on the first Sunday of March.
1492 #
1493 Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S
1494 # IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger.
1495 Rule Para 1997 only - Feb lastSun 0:00 0 -
1496 # Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but
1497 # (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27).
1498 Rule Para 1998 2001 - Mar Sun>=1 0:00 0 -
1499 # From Rives McDow (2002-02-28):
1500 # A decree was issued in Paraguay (no. 16350) on 2002-02-26 that changed the
1501 # dst method to be from the first Sunday in September to the first Sunday in
1502 # April.
1503 Rule Para 2002 2004 - Apr Sun>=1 0:00 0 -
1504 Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 S
1505 #
1506 # From Jesper Nørgaard Welen (2005-01-02):
1507 # There are several sources that claim that Paraguay made
1508 # a timezone rule change in autumn 2004.
1509 # From Steffen Thorsen (2005-01-05):
1510 # Decree 1,867 (2004-03-05)
1511 # From Carlos Raúl Perasso via Jesper Nørgaard Welen (2006-10-13)
1512 # http://www.presidencia.gov.py/decretos/D1867.pdf
1513 Rule Para 2004 2009 - Oct Sun>=15 0:00 1:00 S
1514 Rule Para 2005 2009 - Mar Sun>=8 0:00 0 -
1515 # From Carlos Raúl Perasso (2010-02-18):
1516 # By decree number 3958 issued yesterday
1517 # http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf
1518 # Paraguay changes its DST schedule, postponing the March rule to April and
1519 # modifying the October date. The decree reads:
1520 # ...
1521 # Art. 1. It is hereby established that from the second Sunday of the month of
1522 # April of this year (2010), the official time is to be set back 60 minutes,
1523 # and that on the first Sunday of the month of October, it is to be set
1524 # forward 60 minutes, in all the territory of the Paraguayan Republic.
1525 # ...
1526 Rule Para 2010 max - Oct Sun>=1 0:00 1:00 S
1527 Rule Para 2010 2012 - Apr Sun>=8 0:00 0 -
1528 #
1529 # From Steffen Thorsen (2013-03-07):
1530 # Paraguay will end DST on 2013-03-24 00:00....
1531 # http://www.ande.gov.py/interna.php?id=1075
1532 #
1533 # From Carlos Raúl Perasso (2013-03-15):
1534 # The change in Paraguay is now final. Decree number 10780
1535 # http://www.presidencia.gov.py/uploads/pdf/presidencia-3b86ff4b691c79d4f5927ca964922ec74772ce857c02ca054a52a37b49afc7fb.pdf
1536 # From Carlos Raúl Perasso (2014-02-28):
1537 # Decree 1264 can be found at:
1538 # http://www.presidencia.gov.py/archivos/documentos/DECRETO1264_ey9r8zai.pdf
1539 Rule Para 2013 max - Mar Sun>=22 0:00 0 -
1540
1541 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1542 Zone America/Asuncion -3:50:40 - LMT 1890
1543 -3:50:40 - AMT 1931 Oct 10 # Asunción Mean Time
1544 -4:00 - PYT 1972 Oct # Paraguay Time
1545 -3:00 - PYT 1974 Apr
1546 -4:00 Para PY%sT
1547
1548 # Peru
1549 #
1550 # From Evelyn C. Leeper via Mark Brader (2003-10-26)
1551 # <news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net>:
1552 # When we were in Peru in 1985-1986, they apparently switched over
1553 # sometime between December 29 and January 3 while we were on the Amazon.
1554 #
1555 # From Paul Eggert (2006-03-22):
1556 # Shanks & Pottenger don't have this transition. Assume 1986 was like 1987.
1557
1558 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1559 Rule Peru 1938 only - Jan 1 0:00 1:00 S
1560 Rule Peru 1938 only - Apr 1 0:00 0 -
1561 Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S
1562 Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 -
1563 Rule Peru 1986 1987 - Jan 1 0:00 1:00 S
1564 Rule Peru 1986 1987 - Apr 1 0:00 0 -
1565 Rule Peru 1990 only - Jan 1 0:00 1:00 S
1566 Rule Peru 1990 only - Apr 1 0:00 0 -
1567 # IATA is ambiguous for 1993/1995; go with Shanks & Pottenger.
1568 Rule Peru 1994 only - Jan 1 0:00 1:00 S
1569 Rule Peru 1994 only - Apr 1 0:00 0 -
1570 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1571 Zone America/Lima -5:08:12 - LMT 1890
1577 Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken
1578 -2:00 - GST # South Georgia Time
1579
1580 # South Sandwich Is
1581 # uninhabited; scientific personnel have wintered
1582
1583 # Suriname
1584 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1585 Zone America/Paramaribo -3:40:40 - LMT 1911
1586 -3:40:52 - PMT 1935 # Paramaribo Mean Time
1587 -3:40:36 - PMT 1945 Oct # The capital moved?
1588 -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time
1589 -3:30 - SRT 1984 Oct # Suriname Time
1590 -3:00 - SRT
1591
1592 # Trinidad and Tobago
1593 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1594 Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2
1595 -4:00 - AST
1596
1597 # These all agree with Trinidad and Tobago since 1970.
1598 Link America/Port_of_Spain America/Anguilla
1599 Link America/Port_of_Spain America/Dominica
1600 Link America/Port_of_Spain America/Grenada
1601 Link America/Port_of_Spain America/Guadeloupe
1602 Link America/Port_of_Spain America/Marigot # St Martin (French part)
1603 Link America/Port_of_Spain America/Montserrat
1604 Link America/Port_of_Spain America/St_Barthelemy # St Barthélemy
1605 Link America/Port_of_Spain America/St_Kitts # St Kitts & Nevis
1606 Link America/Port_of_Spain America/St_Lucia
1607 Link America/Port_of_Spain America/St_Thomas # Virgin Islands (US)
1608 Link America/Port_of_Spain America/St_Vincent
1609 Link America/Port_of_Spain America/Tortola # Virgin Islands (UK)
1610
1611 # Uruguay
1612 # From Paul Eggert (1993-11-18):
1613 # Uruguay wins the prize for the strangest peacetime manipulation of the rules.
1614 # From Shanks & Pottenger:
1615 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1616 # Whitman gives 1923 Oct 1; go with Shanks & Pottenger.
1617 Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS
1618 Rule Uruguay 1924 1926 - Apr 1 0:00 0 -
1619 Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS
1620 Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS
1621 # Shanks & Pottenger give 1935 Apr 1 0:00 & 1936 Mar 30 0:00; go with Whitman.
1622 Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 -
1623 Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS
1624 Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 -
1625 # Whitman gives 1937 Oct 3; go with Shanks & Pottenger.
1626 Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS
1627 # Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13,
1628 # and 1943 Apr 13 "to present time"; go with Shanks & Pottenger.
1629 Rule Uruguay 1941 only - Aug 1 0:00 0:30 HS
1643 Rule Uruguay 1972 only - Aug 15 0:00 0 -
1644 Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS
1645 Rule Uruguay 1974 only - Dec 22 0:00 1:00 S
1646 Rule Uruguay 1976 only - Oct 1 0:00 0 -
1647 Rule Uruguay 1977 only - Dec 4 0:00 1:00 S
1648 Rule Uruguay 1978 only - Apr 1 0:00 0 -
1649 Rule Uruguay 1979 only - Oct 1 0:00 1:00 S
1650 Rule Uruguay 1980 only - May 1 0:00 0 -
1651 Rule Uruguay 1987 only - Dec 14 0:00 1:00 S
1652 Rule Uruguay 1988 only - Mar 14 0:00 0 -
1653 Rule Uruguay 1988 only - Dec 11 0:00 1:00 S
1654 Rule Uruguay 1989 only - Mar 12 0:00 0 -
1655 Rule Uruguay 1989 only - Oct 29 0:00 1:00 S
1656 # Shanks & Pottenger say no DST was observed in 1990/1 and 1991/2,
1657 # and that 1992/3's DST was from 10-25 to 03-01. Go with IATA.
1658 Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 -
1659 Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S
1660 Rule Uruguay 1992 only - Oct 18 0:00 1:00 S
1661 Rule Uruguay 1993 only - Feb 28 0:00 0 -
1662 # From Eduardo Cota (2004-09-20):
1663 # The Uruguayan government has decreed a change in the local time....
1664 # http://www.presidencia.gub.uy/decretos/2004091502.htm
1665 Rule Uruguay 2004 only - Sep 19 0:00 1:00 S
1666 # From Steffen Thorsen (2005-03-11):
1667 # Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to
1668 # save energy ... it was postponed two weeks....
1669 # http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm
1670 Rule Uruguay 2005 only - Mar 27 2:00 0 -
1671 # From Eduardo Cota (2005-09-27):
1672 # http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF
1673 # This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at
1674 # 02:00 local time, official time in Uruguay will be at GMT -2.
1675 Rule Uruguay 2005 only - Oct 9 2:00 1:00 S
1676 Rule Uruguay 2006 only - Mar 12 2:00 0 -
1677 # From Jesper Nørgaard Welen (2006-09-06):
1678 # http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF
1679 Rule Uruguay 2006 max - Oct Sun>=1 2:00 1:00 S
1680 Rule Uruguay 2007 max - Mar Sun>=8 2:00 0 -
1681 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1682 Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28
1683 -3:44:44 - MMT 1920 May 1 # Montevideo MT
1684 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time
1685 -3:00 Uruguay UY%sT
1686
1687 # Venezuela
1688 #
1689 # From John Stainforth (2007-11-28):
1690 # ... the change for Venezuela originally expected for 2007-12-31 has
1691 # been brought forward to 2007-12-09. The official announcement was
1692 # published today in the "Gaceta Oficial de la República Bolivariana
1693 # de Venezuela, número 38.819" (official document for all laws or
1694 # resolution publication)
1695 # http://www.globovision.com/news.php?nid=72208
1696
1697 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1698 Zone America/Caracas -4:27:44 - LMT 1890
1699 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time?
1700 -4:30 - VET 1965 # Venezuela Time
1701 -4:00 - VET 2007 Dec 9 3:00
1702 -4:30 - VET
|