1 # This file is in the public domain, so clarified as of
2 # 2009-05-17 by Arthur David Olson.
4 # This data is by no means authoritative; if you think you know better,
5 # go ahead and edit the file (and please send any changes to
6 # tz@iana.org for general use in the future).
8 # From Paul Eggert (2006-03-22):
9 # A good source for time zone historical data outside the U.S. is
10 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
11 # San Diego: ACS Publications, Inc. (2003).
13 # For data circa 1899, a common source is:
14 # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94
15 # <http://www.jstor.org/stable/1774359>.
17 # Gwillim Law writes that a good source
18 # for recent time zone data is the International Air Transport
19 # Association's Standard Schedules Information Manual (IATA SSIM),
20 # published semiannually. Law sent in several helpful summaries
21 # of the IATA's data after 1990.
23 # Except where otherwise noted, Shanks & Pottenger is the source for
24 # entries through 1990, and IATA SSIM is the source for entries afterwards.
26 # Earlier editions of these tables used the North American style (e.g. ARST and
27 # ARDT for Argentine Standard and Daylight Time), but the following quote
28 # suggests that it's better to use European style (e.g. ART and ARST).
29 # I suggest the use of _Summer time_ instead of the more cumbersome
30 # _daylight-saving time_. _Summer time_ seems to be in general use
31 # in Europe and South America.
32 # -- E O Cutler, _New York Times_ (1937-02-14), quoted in
33 # H L Mencken, _The American Language: Supplement I_ (1960), p 466
35 # Earlier editions of these tables also used the North American style
36 # for time zones in Brazil, but this was incorrect, as Brazilians say
37 # "summer time". Reinaldo Goulart, a São Paulo businessman active in
38 # the railroad sector, writes (1999-07-06):
39 # The subject of time zones is currently a matter of discussion/debate in
40 # Brazil. Let's say that "the Brasília time" is considered the
41 # "official time" because Brasília is the capital city.
42 # The other three time zones are called "Brasília time "minus one" or
43 # "plus one" or "plus two". As far as I know there is no such
44 # name/designation as "Eastern Time" or "Central Time".
45 # So I invented the following (English-language) abbreviations for now.
46 # Corrections are welcome!
48 # -2:00 FNT FNST Fernando de Noronha
49 # -3:00 BRT BRST Brasília
50 # -4:00 AMT AMST Amazon
53 ###############################################################################
55 ###############################################################################
59 # From Bob Devine (1988-01-28):
60 # Argentina: first Sunday in October to first Sunday in April since 1976.
61 # Double Summer time from 1969 to 1974. Switches at midnight.
63 # From U. S. Naval Observatory (1988-01-19):
64 # ARGENTINA 3 H BEHIND UTC
66 # From Hernan G. Otero (1995-06-26):
67 # I am sending modifications to the Argentine time zone table...
68 # AR was chosen because they are the ISO letters that represent Argentina.
70 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
71 Rule Arg 1930 only - Dec 1 0:00 1:00 S
72 Rule Arg 1931 only - Apr 1 0:00 0 -
73 Rule Arg 1931 only - Oct 15 0:00 1:00 S
74 Rule Arg 1932 1940 - Mar 1 0:00 0 -
75 Rule Arg 1932 1939 - Nov 1 0:00 1:00 S
76 Rule Arg 1940 only - Jul 1 0:00 1:00 S
77 Rule Arg 1941 only - Jun 15 0:00 0 -
78 Rule Arg 1941 only - Oct 15 0:00 1:00 S
79 Rule Arg 1943 only - Aug 1 0:00 0 -
80 Rule Arg 1943 only - Oct 15 0:00 1:00 S
81 Rule Arg 1946 only - Mar 1 0:00 0 -
82 Rule Arg 1946 only - Oct 1 0:00 1:00 S
83 Rule Arg 1963 only - Oct 1 0:00 0 -
84 Rule Arg 1963 only - Dec 15 0:00 1:00 S
85 Rule Arg 1964 1966 - Mar 1 0:00 0 -
86 Rule Arg 1964 1966 - Oct 15 0:00 1:00 S
87 Rule Arg 1967 only - Apr 2 0:00 0 -
88 Rule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 S
89 Rule Arg 1968 1969 - Apr Sun>=1 0:00 0 -
90 Rule Arg 1974 only - Jan 23 0:00 1:00 S
91 Rule Arg 1974 only - May 1 0:00 0 -
92 Rule Arg 1988 only - Dec 1 0:00 1:00 S
94 # From Hernan G. Otero (1995-06-26):
95 # These corrections were contributed by InterSoft Argentina S.A.,
96 # obtaining the data from the:
97 # Talleres de Hidrografía Naval Argentina
98 # (Argentine Naval Hydrography Institute)
99 Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 -
100 Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S
102 # From Hernan G. Otero (1995-06-26):
103 # From this moment on, the law that mandated the daylight saving
104 # time corrections was derogated and no more modifications
105 # to the time zones (for daylight saving) are now made.
107 # From Rives McDow (2000-01-10):
108 # On October 3, 1999, 0:00 local, Argentina implemented daylight savings time,
109 # which did not result in the switch of a time zone, as they stayed 9 hours
110 # from the International Date Line.
111 Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 S
112 # From Paul Eggert (2007-12-28):
113 # DST was set to expire on March 5, not March 3, but since it was converted
114 # to standard time on March 3 it's more convenient for us to pretend that
115 # it ended on March 3.
116 Rule Arg 2000 only - Mar 3 0:00 0 -
118 # From Peter Gradelski via Steffen Thorsen (2000-03-01):
119 # We just checked with our São Paulo office and they say the government of
120 # Argentina decided not to become one of the countries that go on or off DST.
121 # So Buenos Aires should be -3 hours from GMT at all times.
123 # From Fabián L. Arce Jofré (2000-04-04):
124 # The law that claimed DST for Argentina was derogated by President Fernando
125 # de la Rúa on March 2, 2000, because it would make people spend more energy
126 # in the winter time, rather than less. The change took effect on March 3.
128 # From Mariano Absatz (2001-06-06):
129 # one of the major newspapers here in Argentina said that the 1999
130 # Timezone Law (which never was effectively applied) will (would?) be
131 # in effect.... The article is at
132 # http://ar.clarin.com/diario/2001-06-06/e-01701.htm
133 # ... The Law itself is "Ley No 25155", sanctioned on 1999-08-25, enacted
134 # 1999-09-17, and published 1999-09-21. The official publication is at:
135 # http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF
136 # Regretfully, you have to subscribe (and pay) for the on-line version....
139 # the timezone for Argentina will not change next Sunday.
140 # Apparently it will do so on Sunday 24th....
141 # http://ar.clarin.com/diario/2001-06-12/s-03501.htm
144 # Last Friday (yes, the last working day before the date of the change), the
145 # Senate annulled the 1999 law that introduced the changes later postponed.
146 # http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm
147 # It remains the vote of the Deputies..., but it will be the same....
148 # This kind of things had always been done this way in Argentina.
149 # We are still -03:00 all year round in all of the country.
151 # From Steffen Thorsen (2007-12-21):
152 # A user (Leonardo Chaim) reported that Argentina will adopt DST....
153 # all of the country (all Zone-entries) are affected. News reports like
154 # http://www.lanacion.com.ar/opinion/nota.asp?nota_id=973037 indicate
155 # that Argentina will use DST next year as well, from October to
156 # March, although exact rules are not given.
158 # From Jesper Nørgaard Welen (2007-12-26)
159 # The last hurdle of Argentina DST is over, the proposal was approved in
160 # the lower chamber too (Diputados) with a vote 192 for and 2 against.
161 # By the way thanks to Mariano Absatz and Daniel Mario Vega for the link to
162 # the original scanned proposal, where the dates and the zero hours are
163 # clear and unambiguous...This is the article about final approval:
164 # http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996
166 # From Paul Eggert (2007-12-22):
167 # For dates after mid-2008, the following rules are my guesses and
168 # are quite possibly wrong, but are more likely than no DST at all.
170 # From Alexander Krivenyshev (2008-09-05):
171 # As per message from Carlos Alberto Fonseca Arauz (Nicaragua),
172 # Argentina will start DST on Sunday October 19, 2008.
174 # http://www.worldtimezone.com/dst_news/dst_news_argentina03.html
175 # http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish)
177 # From Rodrigo Severo (2008-10-06):
178 # Here is some info available at a Gentoo bug related to TZ on Argentina's DST:
180 # ------- Comment #1 from [jmdocile] 2008-10-06 16:28 0000 -------
181 # Hi, there is a problem with timezone-data-2008e and maybe with
182 # timezone-data-2008f
183 # Argentinian law [Number] 25.155 is no longer valid.
184 # http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm
185 # The new one is law [Number] 26.350
186 # http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm
187 # So there is no summer time in Argentina for now.
189 # From Mariano Absatz (2008-10-20):
190 # Decree 1693/2008 applies Law 26.350 for the summer 2008/2009 establishing DST in Argentina
191 # From 2008-10-19 until 2009-03-15
192 # http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01
195 # Decree 1705/2008 excepting 12 Provinces from applying DST in the summer
196 # 2008/2009: Catamarca, La Rioja, Mendoza, Salta, San Juan, San Luis, La
197 # Pampa, Neuquén, Rio Negro, Chubut, Santa Cruz and Tierra del Fuego
198 # http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01
200 # Press release 235 dated Saturday October 18th, from the Government of the Province of Jujuy saying
201 # it will not apply DST either (even when it was not included in Decree 1705/2008)
202 # http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc
204 # From fullinet (2009-10-18):
206 # http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356
207 # (an official .gob.ar) under title: "Sin Cambio de Hora" (english: "No hour change")
209 # "Por el momento, el Gobierno Nacional resolvió no modificar la hora
210 # oficial, decisión que estaba en estudio para su implementación el
211 # domingo 18 de octubre. Desde el Ministerio de Planificación se anunció
212 # que la Argentina hoy, en estas condiciones meteorológicas, no necesita
213 # la modificación del huso horario, ya que 2009 nos encuentra con
214 # crecimiento en la producción y distribución energética."
216 Rule Arg 2007 only - Dec 30 0:00 1:00 S
217 Rule Arg 2008 2009 - Mar Sun>=15 0:00 0 -
218 Rule Arg 2008 only - Oct Sun>=15 0:00 1:00 S
220 # From Mariano Absatz (2004-05-21):
221 # Today it was officially published that the Province of Mendoza is changing
222 # its timezone this winter... starting tomorrow night....
223 # http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf
224 # From Paul Eggert (2004-05-24):
225 # It's Law No. 7,210. This change is due to a public power emergency, so for
226 # now we'll assume it's for this year only.
228 # From Paul Eggert (2006-03-22):
229 # Hora de verano para la Republica Argentina (2003-06-08)
230 # <http://www.spicasc.net/horvera.html>
231 # says that standard time in Argentina from 1894-10-31
232 # to 1920-05-01 was -4:16:48.25. Go with this more-precise value
233 # over Shanks & Pottenger.
235 # From Mariano Absatz (2004-06-05):
236 # These media articles from a major newspaper mostly cover the current state:
237 # http://www.lanacion.com.ar/04/05/27/de_604825.asp
238 # http://www.lanacion.com.ar/04/05/28/de_605203.asp
240 # The following eight (8) provinces pulled clocks back to UTC-04:00 at
241 # midnight Monday May 31st. (that is, the night between 05/31 and 06/01).
242 # Apparently, all nine provinces would go back to UTC-03:00 at the same
243 # time in October 17th.
245 # Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz,
246 # Tierra del Fuego, Tucumán.
248 # From Mariano Absatz (2004-06-14):
249 # ... this weekend, the Province of Tucumán decided it'd go back to UTC-03:00
250 # yesterday midnight (that is, at 24:00 Saturday 12th), since the people's
251 # annoyance with the change is much higher than the power savings obtained....
253 # From Gwillim Law (2004-06-14):
254 # http://www.lanacion.com.ar/04/06/10/de_609078.asp ...
255 # "The time change in Tierra del Fuego was a conflicted decision from
256 # the start. The government had decreed that the measure would take
257 # effect on June 1, but a normative error forced the new time to begin
258 # three days earlier, from a Saturday to a Sunday....
259 # Our understanding was that the change was originally scheduled to take place
260 # on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other
261 # provinces). Sunday was May 30, only two days earlier. So the article
262 # contains a contradiction. I would give more credence to the Saturday/Sunday
263 # date than the "three days earlier" phrase, and conclude that Tierra del
264 # Fuego set its clocks back at 2004-05-30 00:00.
266 # From Steffen Thorsen (2004-10-05):
267 # The previous law 7210 which changed the province of Mendoza's time zone
268 # back in May have been modified slightly in a new law 7277, which set the
269 # new end date to 2004-09-26 (original date was 2004-10-17).
270 # http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf
272 # From Mariano Absatz (2004-10-05):
273 # San Juan changed from UTC-03:00 to UTC-04:00 at midnight between
274 # Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00
275 # at midnight between Saturday, July 24th and Sunday, July 25th....
276 # http://www.sanjuan.gov.ar/prensa/archivo/000329.html
277 # http://www.sanjuan.gov.ar/prensa/archivo/000426.html
278 # http://www.sanjuan.gov.ar/prensa/archivo/000441.html
280 # From Alex Krivenyshev (2008-01-17):
281 # Here are articles that Argentina Province San Luis is planning to end DST
282 # as earlier as upcoming Monday January 21, 2008 or February 2008:
284 # Provincia argentina retrasa reloj y marca diferencia con resto del país
285 # (Argentine Province delayed clock and mark difference with the rest of the
287 # http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel
289 # Es inminente que en San Luis atrasen una hora los relojes
290 # (It is imminent in San Luis clocks one hour delay)
291 # http://www.lagaceta.com.ar/nota/253414/Economia/Es-inminente-que-en-San-Luis-atrasen-una-hora-los-relojes.html
292 # http://www.worldtimezone.net/dst_news/dst_news_argentina02.html
294 # From Jesper Nørgaard Welen (2008-01-18):
295 # The page of the San Luis provincial government
296 # http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812
297 # confirms what Alex Krivenyshev has earlier sent to the tz
298 # emailing list about that San Luis plans to return to standard
299 # time much earlier than the rest of the country. It also
300 # confirms that upon request the provinces San Juan and Mendoza
301 # refused to follow San Luis in this change.
303 # The change is supposed to take place Monday the 21.st at 0:00
304 # hours. As far as I understand it if this goes ahead, we need
305 # a new timezone for San Luis (although there are also documented
306 # independent changes in the southamerica file of San Luis in
307 # 1990 and 1991 which has not been confirmed).
309 # From Jesper Nørgaard Welen (2008-01-25):
310 # Unfortunately the below page has become defunct, about the San Luis
311 # time change. Perhaps because it now is part of a group of pages "Most
312 # important pages of 2008."
315 # http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834
316 # instead it seems. Or use "Buscador" from the main page of the San Luis
317 # government, and fill in "huso" and click OK, and you will get 3 pages
318 # from which the first one is identical to the above.
320 # From Mariano Absatz (2008-01-28):
321 # I can confirm that the Province of San Luis (and so far only that
322 # province) decided to go back to UTC-3 effective midnight Jan 20th 2008
323 # (that is, Monday 21st at 0:00 is the time the clocks were delayed back
324 # 1 hour), and they intend to keep UTC-3 as their timezone all year round
325 # (that is, unless they change their mind any minute now).
327 # So we'll have to add yet another city to 'southamerica' (I think San
328 # Luis city is the mos populated city in the Province, so it'd be
329 # America/Argentina/San_Luis... of course I can't remember if San Luis's
330 # history of particular changes goes along with Mendoza or San Juan :-(
331 # (I only remember not being able to collect hard facts about San Luis
332 # back in 2004, when these provinces changed to UTC-4 for a few days, I
333 # mailed them personally and never got an answer).
335 # From Paul Eggert (2008-06-30):
336 # Unless otherwise specified, data are from Shanks & Pottenger through 1992,
337 # from the IATA otherwise. As noted below, Shanks & Pottenger say that
338 # America/Cordoba split into 6 subregions during 1991/1992, one of which
339 # was America/San_Luis, but we haven't verified this yet so for now we'll
340 # keep America/Cordoba a single region rather than splitting it into the
341 # other 5 subregions.
343 # From Mariano Absatz (2009-03-13):
344 # Yesterday (with our usual 2-day notice) the Province of San Luis
345 # decided that next Sunday instead of "staying" @utc-03:00 they will go
346 # to utc-04:00 until the second Saturday in October...
348 # The press release is at
349 # http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102
350 # (I couldn't find the decree, but www.sanluis.gov.ar
351 # is the official page for the Province Government.)
353 # There's also a note in only one of the major national papers ...
354 # http://www.lanacion.com.ar/nota.asp?nota_id=1107912
356 # The press release says [quick and dirty translation]:
357 # ... announced that next Sunday, at 00:00, Puntanos (the San Luis
358 # inhabitants) will have to turn back one hour their clocks
360 # Since then, San Luis will establish its own Province timezone. Thus,
361 # during 2009, this timezone change will run from 00:00 the third Sunday
362 # in March until 24:00 of the second Saturday in October.
364 # From Mariano Absatz (2009-10-16):
365 # ...the Province of San Luis is a case in itself.
368 # http://www.diputadossanluis.gov.ar/diputadosasp/paginas/verNorma.asp?NormaID=276
369 # is ambiguous because establishes a calendar from the 2nd Sunday in
370 # October at 0:00 thru the 2nd Saturday in March at 24:00 and the
371 # complement of that starting on the 2nd Sunday of March at 0:00 and
372 # ending on the 2nd Saturday of March at 24:00.
374 # This clearly breaks every time the 1st of March or October is a Sunday.
376 # IMHO, the "spirit of the Law" is to make the changes at 0:00 on the 2nd
377 # Sunday of October and March.
379 # The problem is that the changes in the rest of the Provinces that did
380 # change in 2007/2008, were made according to the Federal Law and Decrees
381 # that did so on the 3rd Sunday of October and March.
383 # In fact, San Luis actually switched from UTC-4 to UTC-3 last Sunday
384 # (October 11th) at 0:00.
386 # So I guess a new set of rules, besides "Arg", must be made and the last
387 # America/Argentina/San_Luis entries should change to use these...
389 # I'm enclosing a patch that does what I say... regretfully, the San Luis
390 # timezone must be called "WART/WARST" even when most of the time (like,
391 # right now) WARST == ART... that is, since last Sunday, all the country
392 # is using UTC-3, but in my patch, San Luis calls it "WARST" and the rest
393 # of the country calls it "ART".
396 # From Alexander Krivenyshev (2010-04-09):
397 # According to news reports from El Diario de la Republica Province San
398 # Luis, Argentina (standard time UTC-04) will keep Daylight Saving Time
399 # after April 11, 2010 - will continue to have same time as rest of
400 # Argentina (UTC-3) (no DST).
402 # Confirmaron la prórroga del huso horario de verano (Spanish)
403 # http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9
404 # or (some English translation):
405 # http://www.worldtimezone.com/dst_news/dst_news_argentina08.html
407 # From Mariano Absatz (2010-04-12):
408 # yes...I can confirm this...and given that San Luis keeps calling
409 # UTC-03:00 "summer time", we should't just let San Luis go back to "Arg"
410 # rules...San Luis is still using "Western ARgentina Time" and it got
411 # stuck on Summer daylight savings time even though the summer is over.
413 # From Paul Eggert (2013-09-05):
414 # Perhaps San Luis operates on the legal fiction that it is at UTC-4
415 # with perpetual summer time, but ordinary usage typically seems to
416 # just say it's at UTC-3; see, for example,
417 # <http://es.wikipedia.org/wiki/Hora_oficial_argentina>.
418 # We've documented similar situations as being plain changes to
419 # standard time, so let's do that here too. This does not change UTC
420 # offsets, only tm_isdst and the time zone abbreviations. One minor
421 # plus is that this silences a zic complaint that there's no POSIX TZ
422 # setting for time stamps past 2038.
424 # From Paul Eggert (2013-02-21):
425 # Milne says Córdoba time was -4:16:48.2. Round to the nearest second.
427 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
429 # Buenos Aires (BA), Capital Federal (CF),
430 Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31
431 -4:16:48 - CMT 1920 May # Córdoba Mean Time
433 -4:00 Arg AR%sT 1969 Oct 5
434 -3:00 Arg AR%sT 1999 Oct 3
435 -4:00 Arg AR%sT 2000 Mar 3
438 # Córdoba (CB), Santa Fe (SF), Entre Ríos (ER), Corrientes (CN), Misiones (MN),
439 # Chaco (CC), Formosa (FM), Santiago del Estero (SE)
441 # Shanks & Pottenger also make the following claims, which we haven't verified:
442 # - Formosa switched to -3:00 on 1991-01-07.
443 # - Misiones switched to -3:00 on 1990-12-29.
444 # - Chaco switched to -3:00 on 1991-01-04.
445 # - Santiago del Estero switched to -4:00 on 1991-04-01,
446 # then to -3:00 on 1991-04-26.
448 Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31
449 -4:16:48 - CMT 1920 May
451 -4:00 Arg AR%sT 1969 Oct 5
452 -3:00 Arg AR%sT 1991 Mar 3
453 -4:00 - WART 1991 Oct 20
454 -3:00 Arg AR%sT 1999 Oct 3
455 -4:00 Arg AR%sT 2000 Mar 3
458 # Salta (SA), La Pampa (LP), Neuquén (NQ), Rio Negro (RN)
459 Zone America/Argentina/Salta -4:21:40 - LMT 1894 Oct 31
460 -4:16:48 - CMT 1920 May
462 -4:00 Arg AR%sT 1969 Oct 5
463 -3:00 Arg AR%sT 1991 Mar 3
464 -4:00 - WART 1991 Oct 20
465 -3:00 Arg AR%sT 1999 Oct 3
466 -4:00 Arg AR%sT 2000 Mar 3
467 -3:00 Arg AR%sT 2008 Oct 18
471 Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31
472 -4:16:48 - CMT 1920 May
474 -4:00 Arg AR%sT 1969 Oct 5
475 -3:00 Arg AR%sT 1991 Mar 3
476 -4:00 - WART 1991 Oct 20
477 -3:00 Arg AR%sT 1999 Oct 3
478 -4:00 Arg AR%sT 2000 Mar 3
479 -3:00 - ART 2004 Jun 1
480 -4:00 - WART 2004 Jun 13
484 Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31
485 -4:16:48 - CMT 1920 May
487 -4:00 Arg AR%sT 1969 Oct 5
488 -3:00 Arg AR%sT 1991 Mar 1
489 -4:00 - WART 1991 May 7
490 -3:00 Arg AR%sT 1999 Oct 3
491 -4:00 Arg AR%sT 2000 Mar 3
492 -3:00 - ART 2004 Jun 1
493 -4:00 - WART 2004 Jun 20
494 -3:00 Arg AR%sT 2008 Oct 18
498 Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31
499 -4:16:48 - CMT 1920 May
501 -4:00 Arg AR%sT 1969 Oct 5
502 -3:00 Arg AR%sT 1991 Mar 1
503 -4:00 - WART 1991 May 7
504 -3:00 Arg AR%sT 1999 Oct 3
505 -4:00 Arg AR%sT 2000 Mar 3
506 -3:00 - ART 2004 May 31
507 -4:00 - WART 2004 Jul 25
508 -3:00 Arg AR%sT 2008 Oct 18
512 Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31
513 -4:16:48 - CMT 1920 May
515 -4:00 Arg AR%sT 1969 Oct 5
516 -3:00 Arg AR%sT 1990 Mar 4
517 -4:00 - WART 1990 Oct 28
518 -4:00 1:00 WARST 1991 Mar 17
519 -4:00 - WART 1991 Oct 6
521 -3:00 Arg AR%sT 1999 Oct 3
522 -4:00 Arg AR%sT 2000 Mar 3
523 -3:00 Arg AR%sT 2008 Oct 18
526 # Catamarca (CT), Chubut (CH)
527 Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31
528 -4:16:48 - CMT 1920 May
530 -4:00 Arg AR%sT 1969 Oct 5
531 -3:00 Arg AR%sT 1991 Mar 3
532 -4:00 - WART 1991 Oct 20
533 -3:00 Arg AR%sT 1999 Oct 3
534 -4:00 Arg AR%sT 2000 Mar 3
535 -3:00 - ART 2004 Jun 1
536 -4:00 - WART 2004 Jun 20
537 -3:00 Arg AR%sT 2008 Oct 18
541 Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31
542 -4:16:48 - CMT 1920 May
544 -4:00 Arg AR%sT 1969 Oct 5
545 -3:00 Arg AR%sT 1990 Mar 4
546 -4:00 - WART 1990 Oct 15
547 -4:00 1:00 WARST 1991 Mar 1
548 -4:00 - WART 1991 Oct 15
549 -4:00 1:00 WARST 1992 Mar 1
550 -4:00 - WART 1992 Oct 18
551 -3:00 Arg AR%sT 1999 Oct 3
552 -4:00 Arg AR%sT 2000 Mar 3
553 -3:00 - ART 2004 May 23
554 -4:00 - WART 2004 Sep 26
555 -3:00 Arg AR%sT 2008 Oct 18
560 Rule SanLuis 2008 2009 - Mar Sun>=8 0:00 0 -
561 Rule SanLuis 2007 2008 - Oct Sun>=8 0:00 1:00 S
563 Zone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31
564 -4:16:48 - CMT 1920 May
566 -4:00 Arg AR%sT 1969 Oct 5
568 -3:00 1:00 ARST 1990 Mar 14
569 -4:00 - WART 1990 Oct 15
570 -4:00 1:00 WARST 1991 Mar 1
571 -4:00 - WART 1991 Jun 1
572 -3:00 - ART 1999 Oct 3
573 -4:00 1:00 WARST 2000 Mar 3
574 -3:00 - ART 2004 May 31
575 -4:00 - WART 2004 Jul 25
576 -3:00 Arg AR%sT 2008 Jan 21
577 -4:00 SanLuis WAR%sT 2009 Oct 11
581 Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31
582 -4:16:48 - CMT 1920 May # Córdoba Mean Time
584 -4:00 Arg AR%sT 1969 Oct 5
585 -3:00 Arg AR%sT 1999 Oct 3
586 -4:00 Arg AR%sT 2000 Mar 3
587 -3:00 - ART 2004 Jun 1
588 -4:00 - WART 2004 Jun 20
589 -3:00 Arg AR%sT 2008 Oct 18
592 # Tierra del Fuego, Antártida e Islas del Atlántico Sur (TF)
593 Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31
594 -4:16:48 - CMT 1920 May # Córdoba Mean Time
596 -4:00 Arg AR%sT 1969 Oct 5
597 -3:00 Arg AR%sT 1999 Oct 3
598 -4:00 Arg AR%sT 2000 Mar 3
599 -3:00 - ART 2004 May 30
600 -4:00 - WART 2004 Jun 20
601 -3:00 Arg AR%sT 2008 Oct 18
605 Link America/Curacao America/Aruba
608 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
609 Zone America/La_Paz -4:32:36 - LMT 1890
610 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT
611 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST
612 -4:00 - BOT # Bolivia Time
616 # From Paul Eggert (1993-11-18):
617 # The mayor of Rio recently attempted to change the time zone rules
618 # just in his city, in order to leave more summer time for the tourist trade.
619 # The rule change lasted only part of the day;
620 # the federal government refused to follow the city's rules, and business
621 # was in a chaos, so the mayor backed down that afternoon.
623 # From IATA SSIM (1996-02):
624 # _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS),
625 # Santa Catarina (SC), Paraná (PR), São Paulo (SP), Rio de Janeiro (RJ),
626 # Espírito Santo (ES), Minas Gerais (MG), Bahia (BA), Goiás (GO),
627 # Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL].
628 # [The last three states are new to this issue of the IATA SSIM.]
630 # From Gwillim Law (1996-10-07):
631 # Geography, history (Tocantins was part of Goiás until 1989), and other
632 # sources of time zone information lead me to believe that AL, SE, and TO were
633 # always in BR1, and so the only change was whether or not they observed DST....
634 # The earliest issue of the SSIM I have is 2/91. Each issue from then until
635 # 9/95 says that DST is observed only in the ten states I quoted from 9/95,
636 # along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2
637 # (UTC-4).... The other two time zones given for Brazil are BR3, which is
638 # UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is
639 # UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's
640 # become part of the state of Pernambuco). The boundary between BR1 and BR2
641 # has never been clearly stated. They've simply been called East and West.
642 # However, some conclusions can be drawn from another IATA manual: the Airline
643 # Coding Directory, which lists close to 400 airports in Brazil. For each
644 # airport it gives a time zone which is coded to the SSIM. From that
645 # information, I'm led to conclude that the states of Amapá (AP), Ceará (CE),
646 # Maranhão (MA), Paraíba (PR), Pernambuco (PE), Piauí (PI), and Rio Grande do
647 # Norte (RN), and the eastern part of Pará (PA) are all in BR1 without DST.
649 # From Marcos Tadeu (1998-09-27):
650 # Brazilian official page <http://pcdsh01.on.br/verao1.html>
652 # From Jesper Nørgaard (2000-11-03):
653 # [For an official list of which regions in Brazil use which time zones, see:]
654 # http://pcdsh01.on.br/Fusbr.htm
655 # http://pcdsh01.on.br/Fusbrhv.htm
657 # From Celso Doria via David Madeo (2002-10-09):
658 # The reason for the delay this year has to do with elections in Brazil.
660 # Unlike in the United States, elections in Brazil are 100% computerized and
661 # the results are known almost immediately. Yesterday, it was the first
662 # round of the elections when 115 million Brazilians voted for President,
663 # Governor, Senators, Federal Deputies, and State Deputies. Nobody is
664 # counting (or re-counting) votes anymore and we know there will be a second
665 # round for the Presidency and also for some Governors. The 2nd round will
666 # take place on October 27th.
668 # The reason why the DST will only begin November 3rd is that the thousands
669 # of electoral machines used cannot have their time changed, and since the
670 # Constitution says the elections must begin at 8:00 AM and end at 5:00 PM,
671 # the Government decided to postpone DST, instead of changing the Constitution
672 # (maybe, for the next elections, it will be possible to change the clock)...
674 # From Rodrigo Severo (2004-10-04):
675 # It's just the biannual change made necessary by the much hyped, supposedly
676 # modern Brazilian eletronic voting machines which, apparently, can't deal
677 # with a time change between the first and the second rounds of the elections.
679 # From Steffen Thorsen (2007-09-20):
680 # Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00:
681 # http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975
683 # From Paul Schulze (2008-06-24):
684 # ...by law number 11.662 of April 24, 2008 (published in the "Diario
685 # Oficial da União"...) in Brazil there are changes in the timezones,
686 # effective today (00:00am at June 24, 2008) as follows:
688 # a) The timezone UTC+5 is e[x]tinguished, with all the Acre state and the
689 # part of the Amazonas state that had this timezone now being put to the
691 # b) The whole Pará state now is put at timezone UTC+3, instead of just
692 # part of it, as was before.
694 # This change follows a proposal of senator Tiao Viana of Acre state, that
695 # proposed it due to concerns about open television channels displaying
696 # programs inappropriate to youths in the states that had the timezone
697 # UTC+5 too early in the night. In the occasion, some more corrections
698 # were proposed, trying to unify the timezones of any given state. This
699 # change modifies timezone rules defined in decree 2.784 of 18 June,
702 # From Rodrigo Severo (2008-06-24):
703 # Just correcting the URL:
704 # https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008
706 # As a result of the above Decree I believe the America/Rio_Branco
707 # timezone shall be modified from UTC-5 to UTC-4 and a new timezone shall
708 # be created to represent the...west side of the Pará State. I
709 # suggest this new timezone be called Santarem as the most
710 # important/populated city in the affected area.
712 # This new timezone would be the same as the Rio_Branco timezone up to
713 # the 2008/06/24 change which would be to UTC-3 instead of UTC-4.
715 # From Alex Krivenyshev (2008-06-24):
716 # This is a quick reference page for New and Old Brazil Time Zones map.
717 # http://www.worldtimezone.com/brazil-time-new-old.php
719 # - 4 time zones replaced by 3 time zones - eliminating time zone UTC-05
720 # (state Acre and the part of the Amazonas will be UTC/GMT-04) - western
721 # part of Par state is moving to one timezone UTC-03 (from UTC-04).
723 # From Paul Eggert (2002-10-10):
724 # The official decrees referenced below are mostly taken from
725 # Decretos sobre o Horário de Verão no Brasil
726 # <http://pcdsh01.on.br/DecHV.html>.
728 # From Steffen Thorsen (2008-08-29):
729 # As announced by the government and many newspapers in Brazil late
730 # yesterday, Brazil will start DST on 2008-10-19 (need to change rule) and
731 # it will end on 2009-02-15 (current rule for Brazil is fine). Based on
732 # past years experience with the elections, there was a good chance that
733 # the start was postponed to November, but it did not happen this year.
735 # It has not yet been posted to http://pcdsh01.on.br/DecHV.html
737 # An official page about it:
738 # http://www.mme.gov.br/site/news/detail.do?newsId=16722
739 # Note that this link does not always work directly, but must be accessed
741 # http://www.mme.gov.br/first
743 # One example link that works directly:
744 # http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54
747 # We have a written a short article about it as well:
748 # http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html
750 # From Alexander Krivenyshev (2011-10-04):
751 # State Bahia will return to Daylight savings time this year after 8 years off.
752 # The announcement was made by Governor Jaques Wagner in an interview to a
753 # television station in Salvador.
756 # http://g1.globo.com/bahia/noticia/2011/10/governador-jaques-wagner-confirma-horario-de-verao-na-bahia.html
757 # http://noticias.terra.com.br/brasil/noticias/0,,OI5390887-EI8139,00-Bahia+volta+a+ter+horario+de+verao+apos+oito+anos.html
759 # From Guilherme Bernardes Rodrigues (2011-10-07):
760 # There is news in the media, however there is still no decree about it.
761 # I just send a e-mail to Zulmira Brandao at http://pcdsh01.on.br/ the
762 # official agency about time in Brazil, and she confirmed that the old rule is
765 # From Guilherme Bernardes Rodrigues (2011-10-14)
766 # It's official, the President signed a decree that includes Bahia in summer
768 # [ and in a second message (same day): ]
769 # I found the decree.
771 # DECRETO No- 7.584, DE 13 DE OUTUBRO DE 2011
773 # http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6
775 # From Kelley Cook (2012-10-16):
776 # The governor of state of Bahia in Brazil announced on Thursday that
777 # due to public pressure, he is reversing the DST policy they implemented
778 # last year and will not be going to Summer Time on October 21st....
779 # http://www.correio24horas.com.br/r/artigo/apos-pressoes-wagner-suspende-horario-de-verao-na-bahia
781 # From Rodrigo Severo (2012-10-16):
782 # Tocantins state will have DST.
783 # http://noticias.terra.com.br/brasil/noticias/0,,OI6232536-EI306.html
785 # From Steffen Thorsen (2013-09-20):
786 # Tocantins in Brazil is very likely not to observe DST from October....
787 # http://conexaoto.com.br/2013/09/18/ministerio-confirma-que-tocantins-esta-fora-do-horario-de-verao-em-2013-mas-falta-publicacao-de-decreto
788 # We will keep this article updated when this is confirmed:
789 # http://www.timeanddate.com/news/time/brazil-starts-dst-2013.html
791 # From Steffen Thorsen (2013-10-17):
792 # http://www.timeanddate.com/news/time/acre-amazonas-change-time-zone.html
793 # Senator Jorge Viana announced that Acre will change time zone on November 10.
794 # He did not specify the time of the change, nor if western parts of Amazonas
795 # will change as well.
797 # From Paul Eggert (2013-10-17):
798 # For now, assume western Amazonas will change as well.
800 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
801 # Decree 20,466 <http://pcdsh01.on.br/HV20466.htm> (1931-10-01)
802 # Decree 21,896 <http://pcdsh01.on.br/HV21896.htm> (1932-01-10)
803 Rule Brazil 1931 only - Oct 3 11:00 1:00 S
804 Rule Brazil 1932 1933 - Apr 1 0:00 0 -
805 Rule Brazil 1932 only - Oct 3 0:00 1:00 S
806 # Decree 23,195 <http://pcdsh01.on.br/HV23195.htm> (1933-10-10)
808 # Decree 27,496 <http://pcdsh01.on.br/HV27496.htm> (1949-11-24)
809 # Decree 27,998 <http://pcdsh01.on.br/HV27998.htm> (1950-04-13)
810 Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S
811 Rule Brazil 1950 only - Apr 16 1:00 0 -
812 Rule Brazil 1951 1952 - Apr 1 0:00 0 -
813 # Decree 32,308 <http://pcdsh01.on.br/HV32308.htm> (1953-02-24)
814 Rule Brazil 1953 only - Mar 1 0:00 0 -
815 # Decree 34,724 <http://pcdsh01.on.br/HV34724.htm> (1953-11-30)
817 # Decree 52,700 <http://pcdsh01.on.br/HV52700.htm> (1963-10-18)
818 # established DST from 1963-10-23 00:00 to 1964-02-29 00:00
819 # in SP, RJ, GB, MG, ES, due to the prolongation of the drought.
820 # Decree 53,071 <http://pcdsh01.on.br/HV53071.htm> (1963-12-03)
821 # extended the above decree to all of the national territory on 12-09.
822 Rule Brazil 1963 only - Dec 9 0:00 1:00 S
823 # Decree 53,604 <http://pcdsh01.on.br/HV53604.htm> (1964-02-25)
824 # extended summer time by one day to 1964-03-01 00:00 (start of school).
825 Rule Brazil 1964 only - Mar 1 0:00 0 -
826 # Decree 55,639 <http://pcdsh01.on.br/HV55639.htm> (1965-01-27)
827 Rule Brazil 1965 only - Jan 31 0:00 1:00 S
828 Rule Brazil 1965 only - Mar 31 0:00 0 -
829 # Decree 57,303 <http://pcdsh01.on.br/HV57303.htm> (1965-11-22)
830 Rule Brazil 1965 only - Dec 1 0:00 1:00 S
831 # Decree 57,843 <http://pcdsh01.on.br/HV57843.htm> (1966-02-18)
832 Rule Brazil 1966 1968 - Mar 1 0:00 0 -
833 Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S
834 # Decree 63,429 <http://pcdsh01.on.br/HV63429.htm> (1968-10-15)
836 # Decree 91,698 <http://pcdsh01.on.br/HV91698.htm> (1985-09-27)
837 Rule Brazil 1985 only - Nov 2 0:00 1:00 S
838 # Decree 92,310 (1986-01-21)
839 # Decree 92,463 (1986-03-13)
840 Rule Brazil 1986 only - Mar 15 0:00 0 -
841 # Decree 93,316 (1986-10-01)
842 Rule Brazil 1986 only - Oct 25 0:00 1:00 S
843 Rule Brazil 1987 only - Feb 14 0:00 0 -
844 # Decree 94,922 <http://pcdsh01.on.br/HV94922.htm> (1987-09-22)
845 Rule Brazil 1987 only - Oct 25 0:00 1:00 S
846 Rule Brazil 1988 only - Feb 7 0:00 0 -
847 # Decree 96,676 <http://pcdsh01.on.br/HV96676.htm> (1988-09-12)
848 # except for the states of AC, AM, PA, RR, RO, and AP (then a territory)
849 Rule Brazil 1988 only - Oct 16 0:00 1:00 S
850 Rule Brazil 1989 only - Jan 29 0:00 0 -
851 # Decree 98,077 <http://pcdsh01.on.br/HV98077.htm> (1989-08-21)
852 # with the same exceptions
853 Rule Brazil 1989 only - Oct 15 0:00 1:00 S
854 Rule Brazil 1990 only - Feb 11 0:00 0 -
855 # Decree 99,530 <http://pcdsh01.on.br/HV99530.htm> (1990-09-17)
856 # adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF.
857 # Decree 99,629 (1990-10-19) adds BA, MT.
858 Rule Brazil 1990 only - Oct 21 0:00 1:00 S
859 Rule Brazil 1991 only - Feb 17 0:00 0 -
860 # Unnumbered decree <http://pcdsh01.on.br/HV1991.htm> (1991-09-25)
861 # adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF.
862 Rule Brazil 1991 only - Oct 20 0:00 1:00 S
863 Rule Brazil 1992 only - Feb 9 0:00 0 -
864 # Unnumbered decree <http://pcdsh01.on.br/HV1992.htm> (1992-10-16)
865 # adopted by same states.
866 Rule Brazil 1992 only - Oct 25 0:00 1:00 S
867 Rule Brazil 1993 only - Jan 31 0:00 0 -
868 # Decree 942 <http://pcdsh01.on.br/HV942.htm> (1993-09-28)
869 # adopted by same states, plus AM.
870 # Decree 1,252 <http://pcdsh01.on.br/HV1252.htm> (1994-09-22;
871 # web page corrected 2004-01-07) adopted by same states, minus AM.
872 # Decree 1,636 <http://pcdsh01.on.br/HV1636.htm> (1995-09-14)
873 # adopted by same states, plus MT and TO.
874 # Decree 1,674 <http://pcdsh01.on.br/HV1674.htm> (1995-10-13)
876 Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S
877 Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 -
878 Rule Brazil 1996 only - Feb 11 0:00 0 -
879 # Decree 2,000 <http://pcdsh01.on.br/HV2000.htm> (1996-09-04)
880 # adopted by same states, minus AL, SE.
881 Rule Brazil 1996 only - Oct 6 0:00 1:00 S
882 Rule Brazil 1997 only - Feb 16 0:00 0 -
883 # From Daniel C. Sobral (1998-02-12):
884 # In 1997, the DS began on October 6. The stated reason was that
885 # because international television networks ignored Brazil's policy on DS,
886 # they bought the wrong times on satellite for coverage of Pope's visit.
887 # This year, the ending date of DS was postponed to March 1
888 # to help dealing with the shortages of electric power.
890 # Decree 2,317 (1997-09-04), adopted by same states.
891 Rule Brazil 1997 only - Oct 6 0:00 1:00 S
892 # Decree 2,495 <http://pcdsh01.on.br/figuras/HV2495.JPG>
894 Rule Brazil 1998 only - Mar 1 0:00 0 -
895 # Decree 2,780 <http://pcdsh01.on.br/figuras/Hv98.jpg> (1998-09-11)
896 # adopted by the same states as before.
897 Rule Brazil 1998 only - Oct 11 0:00 1:00 S
898 Rule Brazil 1999 only - Feb 21 0:00 0 -
899 # Decree 3,150 <http://pcdsh01.on.br/figuras/HV3150.gif>
900 # (1999-08-23) adopted by same states.
901 # Decree 3,188 <http://pcdsh01.on.br/DecHV99.gif> (1999-09-30)
902 # adds SE, AL, PB, PE, RN, CE, PI, MA and RR.
903 Rule Brazil 1999 only - Oct 3 0:00 1:00 S
904 Rule Brazil 2000 only - Feb 27 0:00 0 -
905 # Decree 3,592 <http://pcdsh01.on.br/DEC3592.htm> (2000-09-06)
906 # adopted by the same states as before.
907 # Decree 3,630 <http://pcdsh01.on.br/Dec3630.jpg> (2000-10-13)
908 # repeals DST in PE and RR, effective 2000-10-15 00:00.
909 # Decree 3,632 <http://pcdsh01.on.br/Dec3632.jpg> (2000-10-17)
910 # repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00.
911 # Decree 3,916 <http://pcdsh01.on.br/figuras/HV3916.gif>
912 # (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE.
913 Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S
914 Rule Brazil 2001 2006 - Feb Sun>=15 0:00 0 -
915 # Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE.
916 # 4,399 <http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm>
917 Rule Brazil 2002 only - Nov 3 0:00 1:00 S
918 # Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO.
919 # 4,844 <http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm>
920 Rule Brazil 2003 only - Oct 19 0:00 1:00 S
921 # Decree 5,223 (2004-10-01) reestablishes DST in MT.
922 # 5,223 <http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm>
923 Rule Brazil 2004 only - Nov 2 0:00 1:00 S
924 # Decree 5,539 <http://pcdsh01.on.br/DecHV5539.gif> (2005-09-19),
925 # adopted by the same states as before.
926 Rule Brazil 2005 only - Oct 16 0:00 1:00 S
927 # Decree 5,920 <http://pcdsh01.on.br/DecHV5920.gif> (2006-10-03),
928 # adopted by the same states as before.
929 Rule Brazil 2006 only - Nov 5 0:00 1:00 S
930 Rule Brazil 2007 only - Feb 25 0:00 0 -
931 # Decree 6,212 <http://pcdsh01.on.br/DecHV6212.gif> (2007-09-26),
932 # adopted by the same states as before.
933 Rule Brazil 2007 only - Oct Sun>=8 0:00 1:00 S
934 # From Frederico A. C. Neves (2008-09-10):
935 # According to this decree
936 # http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm
937 # [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the
938 # 3rd Feb Sunday. There is an exception on the return date when this is
939 # the Carnival Sunday then the return date will be the next Sunday...
940 Rule Brazil 2008 max - Oct Sun>=15 0:00 1:00 S
941 Rule Brazil 2008 2011 - Feb Sun>=15 0:00 0 -
942 Rule Brazil 2012 only - Feb Sun>=22 0:00 0 -
943 Rule Brazil 2013 2014 - Feb Sun>=15 0:00 0 -
944 Rule Brazil 2015 only - Feb Sun>=22 0:00 0 -
945 Rule Brazil 2016 2022 - Feb Sun>=15 0:00 0 -
946 Rule Brazil 2023 only - Feb Sun>=22 0:00 0 -
947 Rule Brazil 2024 2025 - Feb Sun>=15 0:00 0 -
948 Rule Brazil 2026 only - Feb Sun>=22 0:00 0 -
949 Rule Brazil 2027 2033 - Feb Sun>=15 0:00 0 -
950 Rule Brazil 2034 only - Feb Sun>=22 0:00 0 -
951 Rule Brazil 2035 2036 - Feb Sun>=15 0:00 0 -
952 Rule Brazil 2037 only - Feb Sun>=22 0:00 0 -
953 # From Arthur David Olson (2008-09-29):
954 # The next is wrong in some years but is better than nothing.
955 Rule Brazil 2038 max - Feb Sun>=15 0:00 0 -
957 # The latest ruleset listed above says that the following states observe DST:
958 # DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP.
960 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
962 # Fernando de Noronha (administratively part of PE)
963 Zone America/Noronha -2:09:40 - LMT 1914
964 -2:00 Brazil FN%sT 1990 Sep 17
965 -2:00 - FNT 1999 Sep 30
966 -2:00 Brazil FN%sT 2000 Oct 15
967 -2:00 - FNT 2001 Sep 13
968 -2:00 Brazil FN%sT 2002 Oct 1
970 # Other Atlantic islands have no permanent settlement.
971 # These include Trindade and Martim Vaz (administratively part of ES),
972 # Rocas Atoll (RN), and the St Peter and St Paul Archipelago (PE).
973 # Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01;
974 # it also included the Penedos.
976 # Amapá (AP), east Pará (PA)
977 # East Pará includes Belém, Marabá, Serra Norte, and São Félix do Xingu.
978 # The division between east and west Pará is the river Xingu.
979 # In the north a very small part from the river Javary (now Jari I guess,
980 # the border with Amapá) to the Amazon, then to the Xingu.
981 Zone America/Belem -3:13:56 - LMT 1914
982 -3:00 Brazil BR%sT 1988 Sep 12
986 # West Pará includes Altamira, Óbidos, Prainha, Oriximiná, and Santarém.
987 Zone America/Santarem -3:38:48 - LMT 1914
988 -4:00 Brazil AM%sT 1988 Sep 12
989 -4:00 - AMT 2008 Jun 24 00:00
992 # Maranhão (MA), Piauí (PI), Ceará (CE), Rio Grande do Norte (RN),
994 Zone America/Fortaleza -2:34:00 - LMT 1914
995 -3:00 Brazil BR%sT 1990 Sep 17
996 -3:00 - BRT 1999 Sep 30
997 -3:00 Brazil BR%sT 2000 Oct 22
998 -3:00 - BRT 2001 Sep 13
999 -3:00 Brazil BR%sT 2002 Oct 1
1002 # Pernambuco (PE) (except Atlantic islands)
1003 Zone America/Recife -2:19:36 - LMT 1914
1004 -3:00 Brazil BR%sT 1990 Sep 17
1005 -3:00 - BRT 1999 Sep 30
1006 -3:00 Brazil BR%sT 2000 Oct 15
1007 -3:00 - BRT 2001 Sep 13
1008 -3:00 Brazil BR%sT 2002 Oct 1
1012 Zone America/Araguaina -3:12:48 - LMT 1914
1013 -3:00 Brazil BR%sT 1990 Sep 17
1014 -3:00 - BRT 1995 Sep 14
1015 -3:00 Brazil BR%sT 2003 Sep 24
1016 -3:00 - BRT 2012 Oct 21
1017 -3:00 Brazil BR%sT 2013 Sep
1020 # Alagoas (AL), Sergipe (SE)
1021 Zone America/Maceio -2:22:52 - LMT 1914
1022 -3:00 Brazil BR%sT 1990 Sep 17
1023 -3:00 - BRT 1995 Oct 13
1024 -3:00 Brazil BR%sT 1996 Sep 4
1025 -3:00 - BRT 1999 Sep 30
1026 -3:00 Brazil BR%sT 2000 Oct 22
1027 -3:00 - BRT 2001 Sep 13
1028 -3:00 Brazil BR%sT 2002 Oct 1
1032 # There are too many Salvadors elsewhere, so use America/Bahia instead
1033 # of America/Salvador.
1034 Zone America/Bahia -2:34:04 - LMT 1914
1035 -3:00 Brazil BR%sT 2003 Sep 24
1036 -3:00 - BRT 2011 Oct 16
1037 -3:00 Brazil BR%sT 2012 Oct 21
1040 # Goiás (GO), Distrito Federal (DF), Minas Gerais (MG),
1041 # Espírito Santo (ES), Rio de Janeiro (RJ), São Paulo (SP), Paraná (PR),
1042 # Santa Catarina (SC), Rio Grande do Sul (RS)
1043 Zone America/Sao_Paulo -3:06:28 - LMT 1914
1044 -3:00 Brazil BR%sT 1963 Oct 23 00:00
1045 -3:00 1:00 BRST 1964
1048 # Mato Grosso do Sul (MS)
1049 Zone America/Campo_Grande -3:38:28 - LMT 1914
1053 Zone America/Cuiaba -3:44:20 - LMT 1914
1054 -4:00 Brazil AM%sT 2003 Sep 24
1055 -4:00 - AMT 2004 Oct 1
1059 Zone America/Porto_Velho -4:15:36 - LMT 1914
1060 -4:00 Brazil AM%sT 1988 Sep 12
1064 Zone America/Boa_Vista -4:02:40 - LMT 1914
1065 -4:00 Brazil AM%sT 1988 Sep 12
1066 -4:00 - AMT 1999 Sep 30
1067 -4:00 Brazil AM%sT 2000 Oct 15
1070 # east Amazonas (AM): Boca do Acre, Jutaí, Manaus, Floriano Peixoto
1071 # The great circle line from Tabatinga to Porto Acre divides
1072 # east from west Amazonas.
1073 Zone America/Manaus -4:00:04 - LMT 1914
1074 -4:00 Brazil AM%sT 1988 Sep 12
1075 -4:00 - AMT 1993 Sep 28
1076 -4:00 Brazil AM%sT 1994 Sep 22
1079 # west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant,
1080 # Eirunepé, Envira, Ipixuna
1081 Zone America/Eirunepe -4:39:28 - LMT 1914
1082 -5:00 Brazil AC%sT 1988 Sep 12
1083 -5:00 - ACT 1993 Sep 28
1084 -5:00 Brazil AC%sT 1994 Sep 22
1085 -5:00 - ACT 2008 Jun 24 00:00
1086 -4:00 - AMT 2013 Nov 10
1090 Zone America/Rio_Branco -4:31:12 - LMT 1914
1091 -5:00 Brazil AC%sT 1988 Sep 12
1092 -5:00 - ACT 2008 Jun 24 00:00
1093 -4:00 - AMT 2013 Nov 10
1098 # From Eduardo Krell (1995-10-19):
1099 # The law says to switch to DST at midnight [24:00] on the second SATURDAY
1100 # of October.... The law is the same for March and October.
1102 # Because of the drought this year, the government decided to go into
1103 # DST earlier (saturday 9/26 at 24:00). This is a one-time change only ...
1104 # (unless there's another dry season next year, I guess).
1106 # From Julio I. Pacheco Troncoso (1999-03-18):
1107 # Because of the same drought, the government decided to end DST later,
1108 # on April 3, (one-time change).
1110 # From Oscar van Vlijmen (2006-10-08):
1111 # http://www.horaoficial.cl/cambio.htm
1113 # From Jesper Nørgaard Welen (2006-10-08):
1114 # I think that there are some obvious mistakes in the suggested link
1115 # from Oscar van Vlijmen,... for instance entry 66 says that GMT-4
1116 # ended 1990-09-12 while entry 67 only begins GMT-3 at 1990-09-15
1117 # (they should have been 1990-09-15 and 1990-09-16 respectively), but
1118 # anyhow it clears up some doubts too.
1120 # From Paul Eggert (2006-12-27):
1121 # The following data for Chile and America/Santiago are from
1122 # <http://www.horaoficial.cl/horaof.htm> (2006-09-20), transcribed by
1123 # Jesper Nørgaard Welen. The data for Pacific/Easter are from Shanks
1124 # & Pottenger, except with DST transitions after 1932 cloned from
1125 # America/Santiago. The pre-1980 Pacific/Easter data are dubious,
1126 # but we have no other source.
1128 # From Germán Poo-Caamaño (2008-03-03):
1129 # Due to drought, Chile extends Daylight Time in three weeks. This
1130 # is one-time change (Saturday 3/29 at 24:00 for America/Santiago
1131 # and Saturday 3/29 at 22:00 for Pacific/Easter)
1132 # The Supreme Decree is located at
1133 # http://www.shoa.cl/servicios/supremo316.pdf
1134 # and the instructions for 2008 are located in:
1135 # http://www.horaoficial.cl/cambio.htm
1137 # From José Miguel Garrido (2008-03-05):
1139 # You could see the announces of the change on
1140 # http://www.shoa.cl/noticias/2008/04hora/hora.htm
1142 # From Angel Chiang (2010-03-04):
1143 # Subject: DST in Chile exceptionally extended to 3 April due to earthquake
1144 # http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098
1145 # (in Spanish, last paragraph).
1147 # This is breaking news. There should be more information available later.
1149 # From Arthur Daivd Olson (2010-03-06):
1150 # Angel Chiang's message confirmed by Julio Pacheco; Julio provided a patch.
1152 # From Glenn Eychaner (2011-03-02): [geychaner@mac.com]
1153 # It appears that the Chilean government has decided to postpone the
1154 # change from summer time to winter time again, by three weeks to April
1156 # http://www.emol.com/noticias/nacional/detalle/detallenoticias.asp?idnoticia=467651
1158 # This is not yet reflected in the official "cambio de hora" site, but
1159 # probably will be soon:
1160 # http://www.horaoficial.cl/cambio.htm
1162 # From Arthur David Olson (2011-03-02):
1163 # The emol.com article mentions a water shortage as the cause of the
1164 # postponement, which may mean that it's not a permanent change.
1166 # From Glenn Eychaner (2011-03-28):
1168 # http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E}
1171 # Chile's clocks will go back an hour this year on the 7th of May instead
1172 # of this Saturday. They will go forward again the 3rd Saturday in
1173 # August, not in October as they have since 1968. This is a pilot plan
1174 # which will be reevaluated in 2012.
1176 # From Mauricio Parada (2012-02-22), translated by Glenn Eychaner (2012-02-23):
1177 # As stated in the website of the Chilean Energy Ministry
1178 # http://www.minenergia.cl/ministerio/noticias/generales/gobierno-anuncia-fechas-de-cambio-de.html
1179 # The Chilean Government has decided to postpone the entrance into winter time
1180 # (to leave DST) from March 11 2012 to April 28th 2012. The decision has not
1181 # been yet formalized but it will within the next days.
1182 # Quote from the website communication:
1184 # 6. For the year 2012, the dates of entry into winter time will be as follows:
1185 # a. Saturday April 28, 2012, clocks should go back 60 minutes; that is, at
1186 # 23:59:59, instead of passing to 0:00, the time should be adjusted to be 23:00
1188 # b. Saturday, September 1, 2012, clocks should go forward 60 minutes; that is,
1189 # at 23:59:59, instead of passing to 0:00, the time should be adjusted to be
1190 # 01:00 on September 2.
1192 # From Steffen Thorsen (2013-02-15):
1193 # According to several news sources, Chile has extended DST this year,
1194 # they will end DST later and start DST earlier than planned. They
1195 # hope to save energy. The new end date is 2013-04-28 00:00 and new
1196 # start date is 2013-09-08 00:00....
1197 # http://www.gob.cl/informa/2013/02/15/gobierno-anuncia-fechas-de-cambio-de-hora-para-el-ano-2013.htm
1199 # From José Miguel Garrido (2014-02-19):
1200 # Today appeared in the Diario Oficial a decree amending the time change
1202 # DST End: last Saturday of April 2014 (Sun 27 Apr 2014 03:00 UTC)
1203 # DST Start: first Saturday of September 2014 (Sun 07 Sep 2014 04:00 UTC)
1204 # http://www.diariooficial.interior.gob.cl//media/2014/02/19/do-20140219.pdf
1206 # NOTE: ChileAQ rules for Antarctic bases are stored separately in the
1207 # 'antarctica' file.
1209 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1210 Rule Chile 1927 1932 - Sep 1 0:00 1:00 S
1211 Rule Chile 1928 1932 - Apr 1 0:00 0 -
1212 Rule Chile 1942 only - Jun 1 4:00u 0 -
1213 Rule Chile 1942 only - Aug 1 5:00u 1:00 S
1214 Rule Chile 1946 only - Jul 15 4:00u 1:00 S
1215 Rule Chile 1946 only - Sep 1 3:00u 0:00 -
1216 Rule Chile 1947 only - Apr 1 4:00u 0 -
1217 Rule Chile 1968 only - Nov 3 4:00u 1:00 S
1218 Rule Chile 1969 only - Mar 30 3:00u 0 -
1219 Rule Chile 1969 only - Nov 23 4:00u 1:00 S
1220 Rule Chile 1970 only - Mar 29 3:00u 0 -
1221 Rule Chile 1971 only - Mar 14 3:00u 0 -
1222 Rule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 S
1223 Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 -
1224 Rule Chile 1973 only - Sep 30 4:00u 1:00 S
1225 Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 S
1226 Rule Chile 1987 only - Apr 12 3:00u 0 -
1227 Rule Chile 1988 1989 - Mar Sun>=9 3:00u 0 -
1228 Rule Chile 1988 only - Oct Sun>=1 4:00u 1:00 S
1229 Rule Chile 1989 only - Oct Sun>=9 4:00u 1:00 S
1230 Rule Chile 1990 only - Mar 18 3:00u 0 -
1231 Rule Chile 1990 only - Sep 16 4:00u 1:00 S
1232 Rule Chile 1991 1996 - Mar Sun>=9 3:00u 0 -
1233 Rule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 S
1234 Rule Chile 1997 only - Mar 30 3:00u 0 -
1235 Rule Chile 1998 only - Mar Sun>=9 3:00u 0 -
1236 Rule Chile 1998 only - Sep 27 4:00u 1:00 S
1237 Rule Chile 1999 only - Apr 4 3:00u 0 -
1238 Rule Chile 1999 2010 - Oct Sun>=9 4:00u 1:00 S
1239 Rule Chile 2000 2007 - Mar Sun>=9 3:00u 0 -
1240 # N.B.: the end of March 29 in Chile is March 30 in Universal time,
1241 # which is used below in specifying the transition.
1242 Rule Chile 2008 only - Mar 30 3:00u 0 -
1243 Rule Chile 2009 only - Mar Sun>=9 3:00u 0 -
1244 Rule Chile 2010 only - Apr Sun>=1 3:00u 0 -
1245 Rule Chile 2011 only - May Sun>=2 3:00u 0 -
1246 Rule Chile 2011 only - Aug Sun>=16 4:00u 1:00 S
1247 Rule Chile 2012 max - Apr Sun>=23 3:00u 0 -
1248 Rule Chile 2012 max - Sep Sun>=2 4:00u 1:00 S
1249 # IATA SSIM anomalies: (1992-02) says 1992-03-14;
1250 # (1996-09) says 1998-03-08. Ignore these.
1251 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1252 Zone America/Santiago -4:42:46 - LMT 1890
1253 -4:42:46 - SMT 1910 # Santiago Mean Time
1254 -5:00 - CLT 1916 Jul 1 # Chile Time
1255 -4:42:46 - SMT 1918 Sep 1 # Santiago Mean Time
1256 -4:00 - CLT 1919 Jul 1 # Chile Time
1257 -4:42:46 - SMT 1927 Sep 1 # Santiago Mean Time
1258 -5:00 Chile CL%sT 1947 May 22 # Chile Time
1260 Zone Pacific/Easter -7:17:44 - LMT 1890
1261 -7:17:28 - EMT 1932 Sep # Easter Mean Time
1262 -7:00 Chile EAS%sT 1982 Mar 13 21:00 # Easter I Time
1265 # Salas y Gómez Island is uninhabited.
1266 # Other Chilean locations, including Juan Fernández Is, Desventuradas Is,
1267 # and Antarctic bases, are like America/Santiago.
1271 # Milne gives 4:56:16.4 for Bogotá time in 1899; round to nearest. He writes,
1272 # "A variation of fifteen minutes in the public clocks of Bogota is not rare."
1274 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1275 Rule CO 1992 only - May 3 0:00 1:00 S
1276 Rule CO 1993 only - Apr 4 0:00 0 -
1277 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1278 Zone America/Bogota -4:56:16 - LMT 1884 Mar 13
1279 -4:56:16 - BMT 1914 Nov 23 # Bogotá Mean Time
1280 -5:00 CO CO%sT # Colombia Time
1281 # Malpelo, Providencia, San Andres
1282 # no information; probably like America/Bogota
1286 # Milne gives 4:35:46.9 for Curaçao mean time; round to nearest.
1288 # From Paul Eggert (2006-03-22):
1289 # Shanks & Pottenger say that The Bottom and Philipsburg have been at
1290 # -4:00 since standard time was introduced on 1912-03-02; and that
1291 # Kralendijk and Rincon used Kralendijk Mean Time (-4:33:08) from
1292 # 1912-02-02 to 1965-01-01. The former is dubious, since S&P also say
1293 # Saba Island has been like Curaçao.
1294 # This all predates our 1970 cutoff, though.
1296 # By July 2007 Curaçao and St Maarten are planned to become
1297 # associated states within the Netherlands, much like Aruba;
1298 # Bonaire, Saba and St Eustatius would become directly part of the
1299 # Netherlands as Kingdom Islands. This won't affect their time zones
1300 # though, as far as we know.
1302 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1303 Zone America/Curacao -4:35:47 - LMT 1912 Feb 12 # Willemstad
1304 -4:30 - ANT 1965 # Netherlands Antilles Time
1307 # From Arthur David Olson (2011-06-15):
1308 # use links for places with new iso3166 codes.
1309 # The name "Lower Prince's Quarter" is both longer than fourteen characters
1310 # and contains an apostrophe; use "Lower_Princes" below.
1312 Link America/Curacao America/Lower_Princes # Sint Maarten
1313 Link America/Curacao America/Kralendijk # Caribbean Netherlands
1317 # Milne says the Central and South American Telegraph Company used -5:24:15.
1319 # From Paul Eggert (2007-03-04):
1320 # Apparently Ecuador had a failed experiment with DST in 1992.
1321 # <http://midena.gov.ec/content/view/1261/208/> (2007-02-27) and
1322 # <http://www.hoy.com.ec/NoticiaNue.asp?row_id=249856> (2006-11-06) both
1323 # talk about "hora Sixto". Leave this alone for now, as we have no data.
1325 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1326 Zone America/Guayaquil -5:19:20 - LMT 1890
1327 -5:14:00 - QMT 1931 # Quito Mean Time
1328 -5:00 - ECT # Ecuador Time
1329 Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno
1331 -6:00 - GALT # Galápagos Time
1335 # From Paul Eggert (2006-03-22):
1336 # Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except
1337 # the IATA gives 1996-09-08. Go with Shanks & Pottenger.
1339 # From Falkland Islands Government Office, London (2001-01-22)
1340 # via Jesper Nørgaard:
1341 # ... the clocks revert back to Local Mean Time at 2 am on Sunday 15
1342 # April 2001 and advance one hour to summer time at 2 am on Sunday 2
1343 # September. It is anticipated that the clocks will revert back at 2
1344 # am on Sunday 21 April 2002 and advance to summer time at 2 am on
1345 # Sunday 1 September.
1347 # From Rives McDow (2001-02-13):
1349 # I have communicated several times with people there, and the last
1350 # time I had communications that was helpful was in 1998. Here is
1351 # what was said then:
1353 # "The general rule was that Stanley used daylight saving and the Camp
1354 # did not. However for various reasons many people in the Camp have
1355 # started to use daylight saving (known locally as 'Stanley Time')
1356 # There is no rule as to who uses daylight saving - it is a matter of
1357 # personal choice and so it is impossible to draw a map showing who
1358 # uses it and who does not. Any list would be out of date as soon as
1359 # it was produced. This year daylight saving ended on April 18/19th
1360 # and started again on September 12/13th. I do not know what the rule
1361 # is, but can find out if you like. We do not change at the same time
1364 # I did have in my notes that the rule was "Second Saturday in Sep at
1365 # 0:00 until third Saturday in Apr at 0:00". I think that this does
1366 # not agree in some cases with Shanks; is this true?
1368 # Also, there is no mention in the list that some areas in the
1369 # Falklands do not use DST. I have found in my communications there
1370 # that these areas are on the western half of East Falkland and all of
1371 # West Falkland. Stanley is the only place that consistently observes
1372 # DST. Again, as in other places in the world, the farmers don't like
1373 # it. West Falkland is almost entirely sheep farmers.
1375 # I know one lady there that keeps a list of which farm keeps DST and
1376 # which doesn't each year. She runs a shop in Stanley, and says that
1377 # the list changes each year. She uses it to communicate to her
1378 # customers, catching them when they are home for lunch or dinner.
1380 # From Paul Eggert (2001-03-05):
1381 # For now, we'll just record the time in Stanley, since we have no
1384 # From Steffen Thorsen (2011-04-01):
1385 # The Falkland Islands will not turn back clocks this winter, but stay on
1386 # daylight saving time.
1389 # http://www.falklandnews.com/public/story.cfm?get=5914&source=3
1391 # We have gotten this confirmed by a clerk of the legislative assembly:
1392 # Normally the clocks revert to Local Mean Time (UTC/GMT -4 hours) on the
1393 # third Sunday of April at 0200hrs and advance to Summer Time (UTC/GMT -3
1394 # hours) on the first Sunday of September at 0200hrs.
1396 # IMPORTANT NOTE: During 2011, on a trial basis, the Falkland Islands
1397 # will not revert to local mean time, but clocks will remain on Summer
1398 # time (UTC/GMT - 3 hours) throughout the whole of 2011. Any long term
1399 # change to local time following the trial period will be notified.
1401 # From Andrew Newman (2012-02-24)
1402 # A letter from Justin McPhee, Chief Executive,
1403 # Cable & Wireless Falkland Islands (dated 2012-02-22)
1405 # The current Atlantic/Stanley entry under South America expects the
1406 # clocks to go back to standard Falklands Time (FKT) on the 15th April.
1407 # The database entry states that in 2011 Stanley was staying on fixed
1408 # summer time on a trial basis only. FIG need to contact IANA and/or
1409 # the maintainers of the database to inform them we're adopting
1410 # the same policy this year and suggest recommendations for future years.
1412 # For now we will assume permanent summer time for the Falklands
1413 # until advised differently (to apply for 2012 and beyond, after the 2011
1414 # experiment was apparently successful.)
1415 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1416 Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S
1417 Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 -
1418 Rule Falk 1939 only - Oct 1 0:00 1:00 S
1419 Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S
1420 Rule Falk 1943 only - Jan 1 0:00 0 -
1421 Rule Falk 1983 only - Sep lastSun 0:00 1:00 S
1422 Rule Falk 1984 1985 - Apr lastSun 0:00 0 -
1423 Rule Falk 1984 only - Sep 16 0:00 1:00 S
1424 Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S
1425 Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 -
1426 Rule Falk 2001 2010 - Apr Sun>=15 2:00 0 -
1427 Rule Falk 2001 2010 - Sep Sun>=1 2:00 1:00 S
1428 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1429 Zone Atlantic/Stanley -3:51:24 - LMT 1890
1430 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time
1431 -4:00 Falk FK%sT 1983 May # Falkland Is Time
1432 -3:00 Falk FK%sT 1985 Sep 15
1433 -4:00 Falk FK%sT 2010 Sep 5 02:00
1437 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1438 Zone America/Cayenne -3:29:20 - LMT 1911 Jul
1439 -4:00 - GFT 1967 Oct # French Guiana Time
1443 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1444 Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown
1445 -3:45 - GBGT 1966 May 26 # Br Guiana Time
1446 -3:45 - GYT 1975 Jul 31 # Guyana Time
1448 # IATA SSIM (1996-06) says -4:00. Assume a 1991 switch.
1453 # From Paul Eggert (2006-03-22):
1454 # Shanks & Pottenger say that spring transitions are 01:00 -> 02:00,
1455 # and autumn transitions are 00:00 -> 23:00. Go with pre-1999
1456 # editions of Shanks, and with the IATA, who say transitions occur at 00:00.
1458 # From Waldemar Villamayor-Venialbo (2013-09-20):
1459 # No time of the day is established for the adjustment, so people normally
1460 # adjust their clocks at 0 hour of the given dates.
1462 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1463 Rule Para 1975 1988 - Oct 1 0:00 1:00 S
1464 Rule Para 1975 1978 - Mar 1 0:00 0 -
1465 Rule Para 1979 1991 - Apr 1 0:00 0 -
1466 Rule Para 1989 only - Oct 22 0:00 1:00 S
1467 Rule Para 1990 only - Oct 1 0:00 1:00 S
1468 Rule Para 1991 only - Oct 6 0:00 1:00 S
1469 Rule Para 1992 only - Mar 1 0:00 0 -
1470 Rule Para 1992 only - Oct 5 0:00 1:00 S
1471 Rule Para 1993 only - Mar 31 0:00 0 -
1472 Rule Para 1993 1995 - Oct 1 0:00 1:00 S
1473 Rule Para 1994 1995 - Feb lastSun 0:00 0 -
1474 Rule Para 1996 only - Mar 1 0:00 0 -
1475 # IATA SSIM (2000-02) says 1999-10-10; ignore this for now.
1476 # From Steffen Thorsen (2000-10-02):
1477 # I have three independent reports that Paraguay changed to DST this Sunday
1480 # Translated by Gwillim Law (2001-02-27) from
1481 # Noticias, a daily paper in Asunción, Paraguay (2000-10-01)
1482 # <http://www.diarionoticias.com.py/011000/nacional/naciona1.htm>:
1483 # Starting at 0:00 today, the clock will be set forward 60 minutes, in
1484 # fulfillment of Decree No. 7,273 of the Executive Power.... The time change
1485 # system has been operating for several years. Formerly there was a separate
1486 # decree each year; the new law has the same effect, but permanently. Every
1487 # year, the time will change on the first Sunday of October; likewise, the
1488 # clock will be set back on the first Sunday of March.
1490 Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S
1491 # IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger.
1492 Rule Para 1997 only - Feb lastSun 0:00 0 -
1493 # Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but
1494 # (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27).
1495 Rule Para 1998 2001 - Mar Sun>=1 0:00 0 -
1496 # From Rives McDow (2002-02-28):
1497 # A decree was issued in Paraguay (no. 16350) on 2002-02-26 that changed the
1498 # dst method to be from the first Sunday in September to the first Sunday in
1500 Rule Para 2002 2004 - Apr Sun>=1 0:00 0 -
1501 Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 S
1503 # From Jesper Nørgaard Welen (2005-01-02):
1504 # There are several sources that claim that Paraguay made
1505 # a timezone rule change in autumn 2004.
1506 # From Steffen Thorsen (2005-01-05):
1507 # Decree 1,867 (2004-03-05)
1508 # From Carlos Raúl Perasso via Jesper Nørgaard Welen (2006-10-13)
1509 # <http://www.presidencia.gov.py/decretos/D1867.pdf>
1510 Rule Para 2004 2009 - Oct Sun>=15 0:00 1:00 S
1511 Rule Para 2005 2009 - Mar Sun>=8 0:00 0 -
1512 # From Carlos Raúl Perasso (2010-02-18):
1513 # By decree number 3958 issued yesterday
1514 # http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf
1515 # Paraguay changes its DST schedule, postponing the March rule to April and
1516 # modifying the October date. The decree reads:
1518 # Art. 1. It is hereby established that from the second Sunday of the month of
1519 # April of this year (2010), the official time is to be set back 60 minutes,
1520 # and that on the first Sunday of the month of October, it is to be set
1521 # forward 60 minutes, in all the territory of the Paraguayan Republic.
1523 Rule Para 2010 max - Oct Sun>=1 0:00 1:00 S
1524 Rule Para 2010 2012 - Apr Sun>=8 0:00 0 -
1526 # From Steffen Thorsen (2013-03-07):
1527 # Paraguay will end DST on 2013-03-24 00:00....
1528 # http://www.ande.gov.py/interna.php?id=1075
1530 # From Carlos Raúl Perasso (2013-03-15):
1531 # The change in Paraguay is now final. Decree number 10780
1532 # http://www.presidencia.gov.py/uploads/pdf/presidencia-3b86ff4b691c79d4f5927ca964922ec74772ce857c02ca054a52a37b49afc7fb.pdf
1533 # From Carlos Raúl Perasso (2014-02-28):
1534 # Decree 1264 can be found at:
1535 # http://www.presidencia.gov.py/archivos/documentos/DECRETO1264_ey9r8zai.pdf
1536 Rule Para 2013 max - Mar Sun>=22 0:00 0 -
1538 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1539 Zone America/Asuncion -3:50:40 - LMT 1890
1540 -3:50:40 - AMT 1931 Oct 10 # Asunción Mean Time
1541 -4:00 - PYT 1972 Oct # Paraguay Time
1542 -3:00 - PYT 1974 Apr
1547 # From Evelyn C. Leeper via Mark Brader (2003-10-26)
1548 # <news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net>:
1549 # When we were in Peru in 1985-1986, they apparently switched over
1550 # sometime between December 29 and January 3 while we were on the Amazon.
1552 # From Paul Eggert (2006-03-22):
1553 # Shanks & Pottenger don't have this transition. Assume 1986 was like 1987.
1555 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1556 Rule Peru 1938 only - Jan 1 0:00 1:00 S
1557 Rule Peru 1938 only - Apr 1 0:00 0 -
1558 Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S
1559 Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 -
1560 Rule Peru 1986 1987 - Jan 1 0:00 1:00 S
1561 Rule Peru 1986 1987 - Apr 1 0:00 0 -
1562 Rule Peru 1990 only - Jan 1 0:00 1:00 S
1563 Rule Peru 1990 only - Apr 1 0:00 0 -
1564 # IATA is ambiguous for 1993/1995; go with Shanks & Pottenger.
1565 Rule Peru 1994 only - Jan 1 0:00 1:00 S
1566 Rule Peru 1994 only - Apr 1 0:00 0 -
1567 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1568 Zone America/Lima -5:08:12 - LMT 1890
1569 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time?
1570 -5:00 Peru PE%sT # Peru Time
1573 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1574 Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken
1575 -2:00 - GST # South Georgia Time
1578 # uninhabited; scientific personnel have wintered
1581 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1582 Zone America/Paramaribo -3:40:40 - LMT 1911
1583 -3:40:52 - PMT 1935 # Paramaribo Mean Time
1584 -3:40:36 - PMT 1945 Oct # The capital moved?
1585 -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time
1586 -3:30 - SRT 1984 Oct # Suriname Time
1589 # Trinidad and Tobago
1590 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1591 Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2
1594 # These all agree with Trinidad and Tobago since 1970.
1595 Link America/Port_of_Spain America/Anguilla
1596 Link America/Port_of_Spain America/Dominica
1597 Link America/Port_of_Spain America/Grenada
1598 Link America/Port_of_Spain America/Guadeloupe
1599 Link America/Port_of_Spain America/Marigot # St Martin (French part)
1600 Link America/Port_of_Spain America/Montserrat
1601 Link America/Port_of_Spain America/St_Barthelemy # St Barthélemy
1602 Link America/Port_of_Spain America/St_Kitts # St Kitts & Nevis
1603 Link America/Port_of_Spain America/St_Lucia
1604 Link America/Port_of_Spain America/St_Thomas # Virgin Islands (US)
1605 Link America/Port_of_Spain America/St_Vincent
1606 Link America/Port_of_Spain America/Tortola # Virgin Islands (UK)
1609 # From Paul Eggert (1993-11-18):
1610 # Uruguay wins the prize for the strangest peacetime manipulation of the rules.
1611 # From Shanks & Pottenger:
1612 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1613 # Whitman gives 1923 Oct 1; go with Shanks & Pottenger.
1614 Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS
1615 Rule Uruguay 1924 1926 - Apr 1 0:00 0 -
1616 Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS
1617 Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS
1618 # Shanks & Pottenger give 1935 Apr 1 0:00 & 1936 Mar 30 0:00; go with Whitman.
1619 Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 -
1620 Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS
1621 Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 -
1622 # Whitman gives 1937 Oct 3; go with Shanks & Pottenger.
1623 Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS
1624 # Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13,
1625 # and 1943 Apr 13 "to present time"; go with Shanks & Pottenger.
1626 Rule Uruguay 1941 only - Aug 1 0:00 0:30 HS
1627 Rule Uruguay 1942 only - Jan 1 0:00 0 -
1628 Rule Uruguay 1942 only - Dec 14 0:00 1:00 S
1629 Rule Uruguay 1943 only - Mar 14 0:00 0 -
1630 Rule Uruguay 1959 only - May 24 0:00 1:00 S
1631 Rule Uruguay 1959 only - Nov 15 0:00 0 -
1632 Rule Uruguay 1960 only - Jan 17 0:00 1:00 S
1633 Rule Uruguay 1960 only - Mar 6 0:00 0 -
1634 Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S
1635 Rule Uruguay 1965 only - Sep 26 0:00 0 -
1636 Rule Uruguay 1966 1967 - Oct 31 0:00 0 -
1637 Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS
1638 Rule Uruguay 1968 1970 - Dec 2 0:00 0 -
1639 Rule Uruguay 1972 only - Apr 24 0:00 1:00 S
1640 Rule Uruguay 1972 only - Aug 15 0:00 0 -
1641 Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS
1642 Rule Uruguay 1974 only - Dec 22 0:00 1:00 S
1643 Rule Uruguay 1976 only - Oct 1 0:00 0 -
1644 Rule Uruguay 1977 only - Dec 4 0:00 1:00 S
1645 Rule Uruguay 1978 only - Apr 1 0:00 0 -
1646 Rule Uruguay 1979 only - Oct 1 0:00 1:00 S
1647 Rule Uruguay 1980 only - May 1 0:00 0 -
1648 Rule Uruguay 1987 only - Dec 14 0:00 1:00 S
1649 Rule Uruguay 1988 only - Mar 14 0:00 0 -
1650 Rule Uruguay 1988 only - Dec 11 0:00 1:00 S
1651 Rule Uruguay 1989 only - Mar 12 0:00 0 -
1652 Rule Uruguay 1989 only - Oct 29 0:00 1:00 S
1653 # Shanks & Pottenger say no DST was observed in 1990/1 and 1991/2,
1654 # and that 1992/3's DST was from 10-25 to 03-01. Go with IATA.
1655 Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 -
1656 Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S
1657 Rule Uruguay 1992 only - Oct 18 0:00 1:00 S
1658 Rule Uruguay 1993 only - Feb 28 0:00 0 -
1659 # From Eduardo Cota (2004-09-20):
1660 # The uruguayan government has decreed a change in the local time....
1661 # http://www.presidencia.gub.uy/decretos/2004091502.htm
1662 Rule Uruguay 2004 only - Sep 19 0:00 1:00 S
1663 # From Steffen Thorsen (2005-03-11):
1664 # Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to
1665 # save energy ... it was postponed two weeks....
1666 # http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm
1667 Rule Uruguay 2005 only - Mar 27 2:00 0 -
1668 # From Eduardo Cota (2005-09-27):
1669 # http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF
1670 # This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at
1671 # 02:00 local time, official time in Uruguay will be at GMT -2.
1672 Rule Uruguay 2005 only - Oct 9 2:00 1:00 S
1673 Rule Uruguay 2006 only - Mar 12 2:00 0 -
1674 # From Jesper Nørgaard Welen (2006-09-06):
1675 # http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF
1676 Rule Uruguay 2006 max - Oct Sun>=1 2:00 1:00 S
1677 Rule Uruguay 2007 max - Mar Sun>=8 2:00 0 -
1678 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1679 Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28
1680 -3:44:44 - MMT 1920 May 1 # Montevideo MT
1681 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time
1686 # From John Stainforth (2007-11-28):
1687 # ... the change for Venezuela originally expected for 2007-12-31 has
1688 # been brought forward to 2007-12-09. The official announcement was
1689 # published today in the "Gaceta Oficial de la República Bolivariana
1690 # de Venezuela, número 38.819" (official document for all laws or
1691 # resolution publication)
1692 # http://www.globovision.com/news.php?nid=72208
1694 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1695 Zone America/Caracas -4:27:44 - LMT 1890
1696 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time?
1697 -4:30 - VET 1965 # Venezuela Time
1698 -4:00 - VET 2007 Dec 9 03:00
projects / FreeBSD / releng / 9.1.git / blob