1 # This file is in the public domain, so clarified as of
2 # 2009-05-17 by Arthur David Olson.
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.
9 # From Paul Eggert (2014-10-31):
11 # Unless otherwise specified, the source for data through 1990 is:
12 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
13 # San Diego: ACS Publications, Inc. (2003).
14 # Unfortunately this book contains many errors and cites no sources.
16 # Gwillim Law writes that a good source
17 # for recent time zone data is the International Air Transport
18 # Association's Standard Schedules Information Manual (IATA SSIM),
19 # published semiannually. Law sent in several helpful summaries
20 # of the IATA's data after 1990. Except where otherwise noted,
21 # IATA SSIM is the source for entries after 1990.
23 # For data circa 1899, a common source is:
24 # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94.
25 # http://www.jstor.org/stable/1774359
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
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!
49 # -2:00 FNT FNST Fernando de Noronha
50 # -3:00 BRT BRST Brasília
51 # -4:00 AMT AMST Amazon
54 ###############################################################################
56 ###############################################################################
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.
64 # From U. S. Naval Observatory (1988-01-19):
65 # ARGENTINA 3 H BEHIND UTC
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.
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
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
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.
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 -
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.
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.
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....
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
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.
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.
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
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.
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.
175 # http://www.worldtimezone.com/dst_news/dst_news_argentina03.html
176 # http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish)
178 # From Juan Manuel Docile in https://bugs.gentoo.org/240339 (2008-10-07)
179 # via Rodrigo Severo:
180 # Argentinian law No. 25.155 is no longer valid.
181 # http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm
182 # The new one is law No. 26.350
183 # http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm
184 # So there is no summer time in Argentina for now.
186 # From Mariano Absatz (2008-10-20):
187 # Decree 1693/2008 applies Law 26.350 for the summer 2008/2009 establishing DST
188 # in Argentina from 2008-10-19 until 2009-03-15.
189 # http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01
192 # Decree 1705/2008 excepting 12 Provinces from applying DST in the summer
193 # 2008/2009: Catamarca, La Rioja, Mendoza, Salta, San Juan, San Luis, La
194 # Pampa, Neuquén, Rio Negro, Chubut, Santa Cruz and Tierra del Fuego
195 # http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01
197 # Press release 235 dated Saturday October 18th, from the Government of the
198 # Province of Jujuy saying it will not apply DST either (even when it was not
199 # included in Decree 1705/2008).
200 # http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc
202 # From fullinet (2009-10-18):
204 # http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356
205 # (an official .gob.ar) under title: "Sin Cambio de Hora"
206 # (English: "No hour change").
208 # "Por el momento, el Gobierno Nacional resolvió no modificar la hora
209 # oficial, decisión que estaba en estudio para su implementación el
210 # domingo 18 de octubre. Desde el Ministerio de Planificación se anunció
211 # que la Argentina hoy, en estas condiciones meteorológicas, no necesita
212 # la modificación del huso horario, ya que 2009 nos encuentra con
213 # crecimiento en la producción y distribución energética."
215 Rule Arg 2007 only - Dec 30 0:00 1:00 S
216 Rule Arg 2008 2009 - Mar Sun>=15 0:00 0 -
217 Rule Arg 2008 only - Oct Sun>=15 0:00 1:00 S
219 # From Mariano Absatz (2004-05-21):
220 # Today it was officially published that the Province of Mendoza is changing
221 # its timezone this winter... starting tomorrow night....
222 # http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf
223 # From Paul Eggert (2004-05-24):
224 # It's Law No. 7,210. This change is due to a public power emergency, so for
225 # now we'll assume it's for this year only.
227 # From Paul Eggert (2014-08-09):
228 # Hora de verano para la República Argentina
229 # http://buenasiembra.com.ar/esoterismo/astrologia/hora-de-verano-de-la-republica-argentina-27.html
230 # says that standard time in Argentina from 1894-10-31
231 # to 1920-05-01 was -4:16:48.25. Go with this more-precise value
232 # over Shanks & Pottenger.
234 # From Mariano Absatz (2004-06-05):
235 # These media articles from a major newspaper mostly cover the current state:
236 # http://www.lanacion.com.ar/04/05/27/de_604825.asp
237 # http://www.lanacion.com.ar/04/05/28/de_605203.asp
239 # The following eight (8) provinces pulled clocks back to UTC-04:00 at
240 # midnight Monday May 31st. (that is, the night between 05/31 and 06/01).
241 # Apparently, all nine provinces would go back to UTC-03:00 at the same
242 # time in October 17th.
244 # Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz,
245 # Tierra del Fuego, Tucumán.
247 # From Mariano Absatz (2004-06-14):
248 # ... this weekend, the Province of Tucumán decided it'd go back to UTC-03:00
249 # yesterday midnight (that is, at 24:00 Saturday 12th), since the people's
250 # annoyance with the change is much higher than the power savings obtained....
252 # From Gwillim Law (2004-06-14):
253 # http://www.lanacion.com.ar/04/06/10/de_609078.asp ...
254 # "The time change in Tierra del Fuego was a conflicted decision from
255 # the start. The government had decreed that the measure would take
256 # effect on June 1, but a normative error forced the new time to begin
257 # three days earlier, from a Saturday to a Sunday....
258 # Our understanding was that the change was originally scheduled to take place
259 # on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other
260 # provinces). Sunday was May 30, only two days earlier. So the article
261 # contains a contradiction. I would give more credence to the Saturday/Sunday
262 # date than the "three days earlier" phrase, and conclude that Tierra del
263 # Fuego set its clocks back at 2004-05-30 00:00.
265 # From Steffen Thorsen (2004-10-05):
266 # The previous law 7210 which changed the province of Mendoza's time zone
267 # back in May have been modified slightly in a new law 7277, which set the
268 # new end date to 2004-09-26 (original date was 2004-10-17).
269 # http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf
271 # From Mariano Absatz (2004-10-05):
272 # San Juan changed from UTC-03:00 to UTC-04:00 at midnight between
273 # Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00
274 # at midnight between Saturday, July 24th and Sunday, July 25th....
275 # http://www.sanjuan.gov.ar/prensa/archivo/000329.html
276 # http://www.sanjuan.gov.ar/prensa/archivo/000426.html
277 # http://www.sanjuan.gov.ar/prensa/archivo/000441.html
279 # From Alex Krivenyshev (2008-01-17):
280 # Here are articles that Argentina Province San Luis is planning to end DST
281 # as earlier as upcoming Monday January 21, 2008 or February 2008:
283 # Provincia argentina retrasa reloj y marca diferencia con resto del país
284 # (Argentine Province delayed clock and mark difference with the rest of the
286 # http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel
288 # Es inminente que en San Luis atrasen una hora los relojes
289 # (It is imminent in San Luis clocks one hour delay)
290 # http://www.lagaceta.com.ar/nota/253414/Economia/Es-inminente-que-en-San-Luis-atrasen-una-hora-los-relojes.html
291 # http://www.worldtimezone.net/dst_news/dst_news_argentina02.html
293 # From Jesper Nørgaard Welen (2008-01-18):
294 # The page of the San Luis provincial government
295 # http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812
296 # confirms what Alex Krivenyshev has earlier sent to the tz
297 # emailing list about that San Luis plans to return to standard
298 # time much earlier than the rest of the country. It also
299 # confirms that upon request the provinces San Juan and Mendoza
300 # refused to follow San Luis in this change.
302 # The change is supposed to take place Monday the 21st at 0:00
303 # hours. As far as I understand it if this goes ahead, we need
304 # a new timezone for San Luis (although there are also documented
305 # independent changes in the southamerica file of San Luis in
306 # 1990 and 1991 which has not been confirmed).
308 # From Jesper Nørgaard Welen (2008-01-25):
309 # Unfortunately the below page has become defunct, about the San Luis
310 # time change. Perhaps because it now is part of a group of pages "Most
311 # important pages of 2008."
314 # http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834
315 # instead it seems. Or use "Buscador" from the main page of the San Luis
316 # government, and fill in "huso" and click OK, and you will get 3 pages
317 # from which the first one is identical to the above.
319 # From Mariano Absatz (2008-01-28):
320 # I can confirm that the Province of San Luis (and so far only that
321 # province) decided to go back to UTC-3 effective midnight Jan 20th 2008
322 # (that is, Monday 21st at 0:00 is the time the clocks were delayed back
323 # 1 hour), and they intend to keep UTC-3 as their timezone all year round
324 # (that is, unless they change their mind any minute now).
326 # So we'll have to add yet another city to 'southamerica' (I think San
327 # Luis city is the mos populated city in the Province, so it'd be
328 # America/Argentina/San_Luis... of course I can't remember if San Luis's
329 # history of particular changes goes along with Mendoza or San Juan :-(
330 # (I only remember not being able to collect hard facts about San Luis
331 # back in 2004, when these provinces changed to UTC-4 for a few days, I
332 # mailed them personally and never got an answer).
334 # From Paul Eggert (2014-08-12):
335 # Unless otherwise specified, data entries are from Shanks & Pottenger through
336 # 1992, from the IATA otherwise. As noted below, Shanks & Pottenger say that
337 # America/Cordoba split into 6 subregions during 1991/1992, one of which
338 # was America/San_Luis, but we haven't verified this yet so for now we'll
339 # keep America/Cordoba a single region rather than splitting it into the
340 # other 5 subregions.
342 # From Mariano Absatz (2009-03-13):
343 # Yesterday (with our usual 2-day notice) the Province of San Luis
344 # decided that next Sunday instead of "staying" @utc-03:00 they will go
345 # to utc-04:00 until the second Saturday in October...
347 # The press release is at
348 # http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102
349 # (I couldn't find the decree, but www.sanluis.gov.ar
350 # is the official page for the Province Government.)
352 # There's also a note in only one of the major national papers ...
353 # http://www.lanacion.com.ar/nota.asp?nota_id=1107912
355 # The press release says [quick and dirty translation]:
356 # ... announced that next Sunday, at 00:00, Puntanos (the San Luis
357 # inhabitants) will have to turn back one hour their clocks
359 # Since then, San Luis will establish its own Province timezone. Thus,
360 # during 2009, this timezone change will run from 00:00 the third Sunday
361 # in March until 24:00 of the second Saturday in October.
363 # From Mariano Absatz (2009-10-16):
364 # ...the Province of San Luis is a case in itself.
367 # http://www.diputadossanluis.gov.ar/diputadosasp/paginas/verNorma.asp?NormaID=276
368 # is ambiguous because establishes a calendar from the 2nd Sunday in
369 # October at 0:00 thru the 2nd Saturday in March at 24:00 and the
370 # complement of that starting on the 2nd Sunday of March at 0:00 and
371 # ending on the 2nd Saturday of March at 24:00.
373 # This clearly breaks every time the 1st of March or October is a Sunday.
375 # IMHO, the "spirit of the Law" is to make the changes at 0:00 on the 2nd
376 # Sunday of October and March.
378 # The problem is that the changes in the rest of the Provinces that did
379 # change in 2007/2008, were made according to the Federal Law and Decrees
380 # that did so on the 3rd Sunday of October and March.
382 # In fact, San Luis actually switched from UTC-4 to UTC-3 last Sunday
383 # (October 11th) at 0:00.
385 # So I guess a new set of rules, besides "Arg", must be made and the last
386 # America/Argentina/San_Luis entries should change to use these...
388 # I'm enclosing a patch that does what I say... regretfully, the San Luis
389 # timezone must be called "WART/WARST" even when most of the time (like,
390 # right now) WARST == ART... that is, since last Sunday, all the country
391 # is using UTC-3, but in my patch, San Luis calls it "WARST" and the rest
392 # of the country calls it "ART".
395 # From Alexander Krivenyshev (2010-04-09):
396 # According to news reports from El Diario de la República Province San
397 # Luis, Argentina (standard time UTC-04) will keep Daylight Saving Time
398 # after April 11, 2010 - will continue to have same time as rest of
399 # Argentina (UTC-3) (no DST).
401 # Confirmaron la prórroga del huso horario de verano (Spanish)
402 # http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9
403 # or (some English translation):
404 # http://www.worldtimezone.com/dst_news/dst_news_argentina08.html
406 # From Mariano Absatz (2010-04-12):
407 # yes...I can confirm this...and given that San Luis keeps calling
408 # UTC-03:00 "summer time", we should't just let San Luis go back to "Arg"
409 # rules...San Luis is still using "Western ARgentina Time" and it got
410 # stuck on Summer daylight savings time even though the summer is over.
412 # From Paul Eggert (2013-09-05):
413 # Perhaps San Luis operates on the legal fiction that it is at UTC-4
414 # with perpetual summer time, but ordinary usage typically seems to
415 # just say it's at UTC-3; see, for example,
416 # http://es.wikipedia.org/wiki/Hora_oficial_argentina
417 # We've documented similar situations as being plain changes to
418 # standard time, so let's do that here too. This does not change UTC
419 # offsets, only tm_isdst and the time zone abbreviations. One minor
420 # plus is that this silences a zic complaint that there's no POSIX TZ
421 # setting for time stamps past 2038.
423 # From Paul Eggert (2013-02-21):
424 # Milne says Córdoba time was -4:16:48.2. Round to the nearest second.
426 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
428 # Buenos Aires (BA), Capital Federal (CF),
429 Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31
430 -4:16:48 - CMT 1920 May # Córdoba Mean Time
432 -4:00 Arg AR%sT 1969 Oct 5
433 -3:00 Arg AR%sT 1999 Oct 3
434 -4:00 Arg AR%sT 2000 Mar 3
437 # Córdoba (CB), Santa Fe (SF), Entre Ríos (ER), Corrientes (CN), Misiones (MN),
438 # Chaco (CC), Formosa (FM), Santiago del Estero (SE)
440 # Shanks & Pottenger also make the following claims, which we haven't verified:
441 # - Formosa switched to -3:00 on 1991-01-07.
442 # - Misiones switched to -3:00 on 1990-12-29.
443 # - Chaco switched to -3:00 on 1991-01-04.
444 # - Santiago del Estero switched to -4:00 on 1991-04-01,
445 # then to -3:00 on 1991-04-26.
447 Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31
448 -4:16:48 - CMT 1920 May
450 -4:00 Arg AR%sT 1969 Oct 5
451 -3:00 Arg AR%sT 1991 Mar 3
452 -4:00 - WART 1991 Oct 20
453 -3:00 Arg AR%sT 1999 Oct 3
454 -4:00 Arg AR%sT 2000 Mar 3
457 # Salta (SA), La Pampa (LP), Neuquén (NQ), Rio Negro (RN)
458 Zone America/Argentina/Salta -4:21:40 - LMT 1894 Oct 31
459 -4:16:48 - CMT 1920 May
461 -4:00 Arg AR%sT 1969 Oct 5
462 -3:00 Arg AR%sT 1991 Mar 3
463 -4:00 - WART 1991 Oct 20
464 -3:00 Arg AR%sT 1999 Oct 3
465 -4:00 Arg AR%sT 2000 Mar 3
466 -3:00 Arg AR%sT 2008 Oct 18
470 Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31
471 -4:16:48 - CMT 1920 May
473 -4:00 Arg AR%sT 1969 Oct 5
474 -3:00 Arg AR%sT 1991 Mar 3
475 -4:00 - WART 1991 Oct 20
476 -3:00 Arg AR%sT 1999 Oct 3
477 -4:00 Arg AR%sT 2000 Mar 3
478 -3:00 - ART 2004 Jun 1
479 -4:00 - WART 2004 Jun 13
483 Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31
484 -4:16:48 - CMT 1920 May
486 -4:00 Arg AR%sT 1969 Oct 5
487 -3:00 Arg AR%sT 1991 Mar 1
488 -4:00 - WART 1991 May 7
489 -3:00 Arg AR%sT 1999 Oct 3
490 -4:00 Arg AR%sT 2000 Mar 3
491 -3:00 - ART 2004 Jun 1
492 -4:00 - WART 2004 Jun 20
493 -3:00 Arg AR%sT 2008 Oct 18
497 Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31
498 -4:16:48 - CMT 1920 May
500 -4:00 Arg AR%sT 1969 Oct 5
501 -3:00 Arg AR%sT 1991 Mar 1
502 -4:00 - WART 1991 May 7
503 -3:00 Arg AR%sT 1999 Oct 3
504 -4:00 Arg AR%sT 2000 Mar 3
505 -3:00 - ART 2004 May 31
506 -4:00 - WART 2004 Jul 25
507 -3:00 Arg AR%sT 2008 Oct 18
511 Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31
512 -4:16:48 - CMT 1920 May
514 -4:00 Arg AR%sT 1969 Oct 5
515 -3:00 Arg AR%sT 1990 Mar 4
516 -4:00 - WART 1990 Oct 28
517 -4:00 1:00 WARST 1991 Mar 17
518 -4:00 - WART 1991 Oct 6
520 -3:00 Arg AR%sT 1999 Oct 3
521 -4:00 Arg AR%sT 2000 Mar 3
522 -3:00 Arg AR%sT 2008 Oct 18
525 # Catamarca (CT), Chubut (CH)
526 Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31
527 -4:16:48 - CMT 1920 May
529 -4:00 Arg AR%sT 1969 Oct 5
530 -3:00 Arg AR%sT 1991 Mar 3
531 -4:00 - WART 1991 Oct 20
532 -3:00 Arg AR%sT 1999 Oct 3
533 -4:00 Arg AR%sT 2000 Mar 3
534 -3:00 - ART 2004 Jun 1
535 -4:00 - WART 2004 Jun 20
536 -3:00 Arg AR%sT 2008 Oct 18
540 Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31
541 -4:16:48 - CMT 1920 May
543 -4:00 Arg AR%sT 1969 Oct 5
544 -3:00 Arg AR%sT 1990 Mar 4
545 -4:00 - WART 1990 Oct 15
546 -4:00 1:00 WARST 1991 Mar 1
547 -4:00 - WART 1991 Oct 15
548 -4:00 1:00 WARST 1992 Mar 1
549 -4:00 - WART 1992 Oct 18
550 -3:00 Arg AR%sT 1999 Oct 3
551 -4:00 Arg AR%sT 2000 Mar 3
552 -3:00 - ART 2004 May 23
553 -4:00 - WART 2004 Sep 26
554 -3:00 Arg AR%sT 2008 Oct 18
559 Rule SanLuis 2008 2009 - Mar Sun>=8 0:00 0 -
560 Rule SanLuis 2007 2008 - Oct Sun>=8 0:00 1:00 S
562 Zone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31
563 -4:16:48 - CMT 1920 May
565 -4:00 Arg AR%sT 1969 Oct 5
567 -3:00 1:00 ARST 1990 Mar 14
568 -4:00 - WART 1990 Oct 15
569 -4:00 1:00 WARST 1991 Mar 1
570 -4:00 - WART 1991 Jun 1
571 -3:00 - ART 1999 Oct 3
572 -4:00 1:00 WARST 2000 Mar 3
573 -3:00 - ART 2004 May 31
574 -4:00 - WART 2004 Jul 25
575 -3:00 Arg AR%sT 2008 Jan 21
576 -4:00 SanLuis WAR%sT 2009 Oct 11
580 Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31
581 -4:16:48 - CMT 1920 May # Córdoba Mean Time
583 -4:00 Arg AR%sT 1969 Oct 5
584 -3:00 Arg AR%sT 1999 Oct 3
585 -4:00 Arg AR%sT 2000 Mar 3
586 -3:00 - ART 2004 Jun 1
587 -4:00 - WART 2004 Jun 20
588 -3:00 Arg AR%sT 2008 Oct 18
591 # Tierra del Fuego, Antártida e Islas del Atlántico Sur (TF)
592 Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31
593 -4:16:48 - CMT 1920 May # Córdoba Mean Time
595 -4:00 Arg AR%sT 1969 Oct 5
596 -3:00 Arg AR%sT 1999 Oct 3
597 -4:00 Arg AR%sT 2000 Mar 3
598 -3:00 - ART 2004 May 30
599 -4:00 - WART 2004 Jun 20
600 -3:00 Arg AR%sT 2008 Oct 18
604 Link America/Curacao America/Aruba
607 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
608 Zone America/La_Paz -4:32:36 - LMT 1890
609 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT
610 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST
611 -4:00 - BOT # Bolivia Time
615 # From Paul Eggert (1993-11-18):
616 # The mayor of Rio recently attempted to change the time zone rules
617 # just in his city, in order to leave more summer time for the tourist trade.
618 # The rule change lasted only part of the day;
619 # the federal government refused to follow the city's rules, and business
620 # was in a chaos, so the mayor backed down that afternoon.
622 # From IATA SSIM (1996-02):
623 # _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS),
624 # Santa Catarina (SC), Paraná (PR), São Paulo (SP), Rio de Janeiro (RJ),
625 # Espírito Santo (ES), Minas Gerais (MG), Bahia (BA), Goiás (GO),
626 # Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL].
627 # [The last three states are new to this issue of the IATA SSIM.]
629 # From Gwillim Law (1996-10-07):
630 # Geography, history (Tocantins was part of Goiás until 1989), and other
631 # sources of time zone information lead me to believe that AL, SE, and TO were
632 # always in BR1, and so the only change was whether or not they observed DST....
633 # The earliest issue of the SSIM I have is 2/91. Each issue from then until
634 # 9/95 says that DST is observed only in the ten states I quoted from 9/95,
635 # along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2
636 # (UTC-4).... The other two time zones given for Brazil are BR3, which is
637 # UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is
638 # UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's
639 # become part of the state of Pernambuco). The boundary between BR1 and BR2
640 # has never been clearly stated. They've simply been called East and West.
641 # However, some conclusions can be drawn from another IATA manual: the Airline
642 # Coding Directory, which lists close to 400 airports in Brazil. For each
643 # airport it gives a time zone which is coded to the SSIM. From that
644 # information, I'm led to conclude that the states of Amapá (AP), Ceará (CE),
645 # Maranhão (MA), Paraíba (PR), Pernambuco (PE), Piauí (PI), and Rio Grande do
646 # Norte (RN), and the eastern part of Pará (PA) are all in BR1 without DST.
648 # From Marcos Tadeu (1998-09-27):
649 # Brazilian official page <http://pcdsh01.on.br/verao1.html>
651 # From Jesper Nørgaard (2000-11-03):
652 # [For an official list of which regions in Brazil use which time zones, see:]
653 # http://pcdsh01.on.br/Fusbr.htm
654 # http://pcdsh01.on.br/Fusbrhv.htm
656 # From Celso Doria via David Madeo (2002-10-09):
657 # The reason for the delay this year has to do with elections in Brazil.
659 # Unlike in the United States, elections in Brazil are 100% computerized and
660 # the results are known almost immediately. Yesterday, it was the first
661 # round of the elections when 115 million Brazilians voted for President,
662 # Governor, Senators, Federal Deputies, and State Deputies. Nobody is
663 # counting (or re-counting) votes anymore and we know there will be a second
664 # round for the Presidency and also for some Governors. The 2nd round will
665 # take place on October 27th.
667 # The reason why the DST will only begin November 3rd is that the thousands
668 # of electoral machines used cannot have their time changed, and since the
669 # Constitution says the elections must begin at 8:00 AM and end at 5:00 PM,
670 # the Government decided to postpone DST, instead of changing the Constitution
671 # (maybe, for the next elections, it will be possible to change the clock)...
673 # From Rodrigo Severo (2004-10-04):
674 # It's just the biannual change made necessary by the much hyped, supposedly
675 # modern Brazilian eletronic voting machines which, apparently, can't deal
676 # with a time change between the first and the second rounds of the elections.
678 # From Steffen Thorsen (2007-09-20):
679 # Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00:
680 # http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975
682 # From Paul Schulze (2008-06-24):
683 # ...by law number 11.662 of April 24, 2008 (published in the "Diario
684 # Oficial da União"...) in Brazil there are changes in the timezones,
685 # effective today (00:00am at June 24, 2008) as follows:
687 # a) The timezone UTC+5 is extinguished, with all the Acre state and the
688 # part of the Amazonas state that had this timezone now being put to the
690 # b) The whole Pará state now is put at timezone UTC+3, instead of just
691 # part of it, as was before.
693 # This change follows a proposal of senator Tiao Viana of Acre state, that
694 # proposed it due to concerns about open television channels displaying
695 # programs inappropriate to youths in the states that had the timezone
696 # UTC+5 too early in the night. In the occasion, some more corrections
697 # were proposed, trying to unify the timezones of any given state. This
698 # change modifies timezone rules defined in decree 2.784 of 18 June,
701 # From Rodrigo Severo (2008-06-24):
702 # Just correcting the URL:
703 # https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008
705 # As a result of the above Decree I believe the America/Rio_Branco
706 # timezone shall be modified from UTC-5 to UTC-4 and a new timezone shall
707 # be created to represent the...west side of the Pará State. I
708 # suggest this new timezone be called Santarem as the most
709 # important/populated city in the affected area.
711 # This new timezone would be the same as the Rio_Branco timezone up to
712 # the 2008/06/24 change which would be to UTC-3 instead of UTC-4.
714 # From Alex Krivenyshev (2008-06-24):
715 # This is a quick reference page for New and Old Brazil Time Zones map.
716 # http://www.worldtimezone.com/brazil-time-new-old.php
718 # - 4 time zones replaced by 3 time zones - eliminating time zone UTC-05
719 # (state Acre and the part of the Amazonas will be UTC/GMT-04) - western
720 # part of Par state is moving to one timezone UTC-03 (from UTC-04).
722 # From Paul Eggert (2002-10-10):
723 # The official decrees referenced below are mostly taken from
724 # Decretos sobre o Horário de Verão no Brasil.
725 # http://pcdsh01.on.br/DecHV.html
727 # From Steffen Thorsen (2008-08-29):
728 # As announced by the government and many newspapers in Brazil late
729 # yesterday, Brazil will start DST on 2008-10-19 (need to change rule) and
730 # it will end on 2009-02-15 (current rule for Brazil is fine). Based on
731 # past years experience with the elections, there was a good chance that
732 # the start was postponed to November, but it did not happen this year.
734 # It has not yet been posted to http://pcdsh01.on.br/DecHV.html
736 # An official page about it:
737 # http://www.mme.gov.br/site/news/detail.do?newsId=16722
738 # Note that this link does not always work directly, but must be accessed
740 # http://www.mme.gov.br/first
742 # One example link that works directly:
743 # http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54
746 # We have a written a short article about it as well:
747 # http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html
749 # From Alexander Krivenyshev (2011-10-04):
750 # State Bahia will return to Daylight savings time this year after 8 years off.
751 # The announcement was made by Governor Jaques Wagner in an interview to a
752 # television station in Salvador.
755 # http://g1.globo.com/bahia/noticia/2011/10/governador-jaques-wagner-confirma-horario-de-verao-na-bahia.html
756 # http://noticias.terra.com.br/brasil/noticias/0,,OI5390887-EI8139,00-Bahia+volta+a+ter+horario+de+verao+apos+oito+anos.html
758 # From Guilherme Bernardes Rodrigues (2011-10-07):
759 # There is news in the media, however there is still no decree about it.
760 # I just send a e-mail to Zulmira Brandao at http://pcdsh01.on.br/ the
761 # official agency about time in Brazil, and she confirmed that the old rule is
764 # From Guilherme Bernardes Rodrigues (2011-10-14)
765 # It's official, the President signed a decree that includes Bahia in summer
767 # [ and in a second message (same day): ]
768 # I found the decree.
770 # DECRETO No. 7.584, DE 13 DE OUTUBRO DE 2011
772 # http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6
774 # From Kelley Cook (2012-10-16):
775 # The governor of state of Bahia in Brazil announced on Thursday that
776 # due to public pressure, he is reversing the DST policy they implemented
777 # last year and will not be going to Summer Time on October 21st....
778 # http://www.correio24horas.com.br/r/artigo/apos-pressoes-wagner-suspende-horario-de-verao-na-bahia
780 # From Rodrigo Severo (2012-10-16):
781 # Tocantins state will have DST.
782 # http://noticias.terra.com.br/brasil/noticias/0,,OI6232536-EI306.html
784 # From Steffen Thorsen (2013-09-20):
785 # Tocantins in Brazil is very likely not to observe DST from October....
786 # http://conexaoto.com.br/2013/09/18/ministerio-confirma-que-tocantins-esta-fora-do-horario-de-verao-em-2013-mas-falta-publicacao-de-decreto
787 # We will keep this article updated when this is confirmed:
788 # http://www.timeanddate.com/news/time/brazil-starts-dst-2013.html
790 # From Steffen Thorsen (2013-10-17):
791 # http://www.timeanddate.com/news/time/acre-amazonas-change-time-zone.html
792 # Senator Jorge Viana announced that Acre will change time zone on November 10.
793 # He did not specify the time of the change, nor if western parts of Amazonas
794 # will change as well.
796 # From Paul Eggert (2013-10-17):
797 # For now, assume western Amazonas will change as well.
799 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
800 # Decree 20,466 <http://pcdsh01.on.br/HV20466.htm> (1931-10-01)
801 # Decree 21,896 <http://pcdsh01.on.br/HV21896.htm> (1932-01-10)
802 Rule Brazil 1931 only - Oct 3 11:00 1:00 S
803 Rule Brazil 1932 1933 - Apr 1 0:00 0 -
804 Rule Brazil 1932 only - Oct 3 0:00 1:00 S
805 # Decree 23,195 <http://pcdsh01.on.br/HV23195.htm> (1933-10-10)
807 # Decree 27,496 <http://pcdsh01.on.br/HV27496.htm> (1949-11-24)
808 # Decree 27,998 <http://pcdsh01.on.br/HV27998.htm> (1950-04-13)
809 Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S
810 Rule Brazil 1950 only - Apr 16 1:00 0 -
811 Rule Brazil 1951 1952 - Apr 1 0:00 0 -
812 # Decree 32,308 <http://pcdsh01.on.br/HV32308.htm> (1953-02-24)
813 Rule Brazil 1953 only - Mar 1 0:00 0 -
814 # Decree 34,724 <http://pcdsh01.on.br/HV34724.htm> (1953-11-30)
816 # Decree 52,700 <http://pcdsh01.on.br/HV52700.htm> (1963-10-18)
817 # established DST from 1963-10-23 00:00 to 1964-02-29 00:00
818 # in SP, RJ, GB, MG, ES, due to the prolongation of the drought.
819 # Decree 53,071 <http://pcdsh01.on.br/HV53071.htm> (1963-12-03)
820 # extended the above decree to all of the national territory on 12-09.
821 Rule Brazil 1963 only - Dec 9 0:00 1:00 S
822 # Decree 53,604 <http://pcdsh01.on.br/HV53604.htm> (1964-02-25)
823 # extended summer time by one day to 1964-03-01 00:00 (start of school).
824 Rule Brazil 1964 only - Mar 1 0:00 0 -
825 # Decree 55,639 <http://pcdsh01.on.br/HV55639.htm> (1965-01-27)
826 Rule Brazil 1965 only - Jan 31 0:00 1:00 S
827 Rule Brazil 1965 only - Mar 31 0:00 0 -
828 # Decree 57,303 <http://pcdsh01.on.br/HV57303.htm> (1965-11-22)
829 Rule Brazil 1965 only - Dec 1 0:00 1:00 S
830 # Decree 57,843 <http://pcdsh01.on.br/HV57843.htm> (1966-02-18)
831 Rule Brazil 1966 1968 - Mar 1 0:00 0 -
832 Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S
833 # Decree 63,429 <http://pcdsh01.on.br/HV63429.htm> (1968-10-15)
835 # Decree 91,698 <http://pcdsh01.on.br/HV91698.htm> (1985-09-27)
836 Rule Brazil 1985 only - Nov 2 0:00 1:00 S
837 # Decree 92,310 (1986-01-21)
838 # Decree 92,463 (1986-03-13)
839 Rule Brazil 1986 only - Mar 15 0:00 0 -
840 # Decree 93,316 (1986-10-01)
841 Rule Brazil 1986 only - Oct 25 0:00 1:00 S
842 Rule Brazil 1987 only - Feb 14 0:00 0 -
843 # Decree 94,922 <http://pcdsh01.on.br/HV94922.htm> (1987-09-22)
844 Rule Brazil 1987 only - Oct 25 0:00 1:00 S
845 Rule Brazil 1988 only - Feb 7 0:00 0 -
846 # Decree 96,676 <http://pcdsh01.on.br/HV96676.htm> (1988-09-12)
847 # except for the states of AC, AM, PA, RR, RO, and AP (then a territory)
848 Rule Brazil 1988 only - Oct 16 0:00 1:00 S
849 Rule Brazil 1989 only - Jan 29 0:00 0 -
850 # Decree 98,077 <http://pcdsh01.on.br/HV98077.htm> (1989-08-21)
851 # with the same exceptions
852 Rule Brazil 1989 only - Oct 15 0:00 1:00 S
853 Rule Brazil 1990 only - Feb 11 0:00 0 -
854 # Decree 99,530 <http://pcdsh01.on.br/HV99530.htm> (1990-09-17)
855 # adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF.
856 # Decree 99,629 (1990-10-19) adds BA, MT.
857 Rule Brazil 1990 only - Oct 21 0:00 1:00 S
858 Rule Brazil 1991 only - Feb 17 0:00 0 -
859 # Unnumbered decree <http://pcdsh01.on.br/HV1991.htm> (1991-09-25)
860 # adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF.
861 Rule Brazil 1991 only - Oct 20 0:00 1:00 S
862 Rule Brazil 1992 only - Feb 9 0:00 0 -
863 # Unnumbered decree <http://pcdsh01.on.br/HV1992.htm> (1992-10-16)
864 # adopted by same states.
865 Rule Brazil 1992 only - Oct 25 0:00 1:00 S
866 Rule Brazil 1993 only - Jan 31 0:00 0 -
867 # Decree 942 <http://pcdsh01.on.br/HV942.htm> (1993-09-28)
868 # adopted by same states, plus AM.
869 # Decree 1,252 <http://pcdsh01.on.br/HV1252.htm> (1994-09-22;
870 # web page corrected 2004-01-07) adopted by same states, minus AM.
871 # Decree 1,636 <http://pcdsh01.on.br/HV1636.htm> (1995-09-14)
872 # adopted by same states, plus MT and TO.
873 # Decree 1,674 <http://pcdsh01.on.br/HV1674.htm> (1995-10-13)
875 Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S
876 Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 -
877 Rule Brazil 1996 only - Feb 11 0:00 0 -
878 # Decree 2,000 <http://pcdsh01.on.br/HV2000.htm> (1996-09-04)
879 # adopted by same states, minus AL, SE.
880 Rule Brazil 1996 only - Oct 6 0:00 1:00 S
881 Rule Brazil 1997 only - Feb 16 0:00 0 -
882 # From Daniel C. Sobral (1998-02-12):
883 # In 1997, the DS began on October 6. The stated reason was that
884 # because international television networks ignored Brazil's policy on DS,
885 # they bought the wrong times on satellite for coverage of Pope's visit.
886 # This year, the ending date of DS was postponed to March 1
887 # to help dealing with the shortages of electric power.
889 # Decree 2,317 (1997-09-04), adopted by same states.
890 Rule Brazil 1997 only - Oct 6 0:00 1:00 S
891 # Decree 2,495 <http://pcdsh01.on.br/figuras/HV2495.JPG>
893 Rule Brazil 1998 only - Mar 1 0:00 0 -
894 # Decree 2,780 <http://pcdsh01.on.br/figuras/Hv98.jpg> (1998-09-11)
895 # adopted by the same states as before.
896 Rule Brazil 1998 only - Oct 11 0:00 1:00 S
897 Rule Brazil 1999 only - Feb 21 0:00 0 -
898 # Decree 3,150 <http://pcdsh01.on.br/figuras/HV3150.gif>
899 # (1999-08-23) adopted by same states.
900 # Decree 3,188 <http://pcdsh01.on.br/DecHV99.gif> (1999-09-30)
901 # adds SE, AL, PB, PE, RN, CE, PI, MA and RR.
902 Rule Brazil 1999 only - Oct 3 0:00 1:00 S
903 Rule Brazil 2000 only - Feb 27 0:00 0 -
904 # Decree 3,592 <http://pcdsh01.on.br/DEC3592.htm> (2000-09-06)
905 # adopted by the same states as before.
906 # Decree 3,630 <http://pcdsh01.on.br/Dec3630.jpg> (2000-10-13)
907 # repeals DST in PE and RR, effective 2000-10-15 00:00.
908 # Decree 3,632 <http://pcdsh01.on.br/Dec3632.jpg> (2000-10-17)
909 # repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00.
910 # Decree 3,916 <http://pcdsh01.on.br/figuras/HV3916.gif>
911 # (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE.
912 Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S
913 Rule Brazil 2001 2006 - Feb Sun>=15 0:00 0 -
914 # Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE.
915 # 4,399 <http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm>
916 Rule Brazil 2002 only - Nov 3 0:00 1:00 S
917 # Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO.
918 # 4,844 <http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm>
919 Rule Brazil 2003 only - Oct 19 0:00 1:00 S
920 # Decree 5,223 (2004-10-01) reestablishes DST in MT.
921 # 5,223 <http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm>
922 Rule Brazil 2004 only - Nov 2 0:00 1:00 S
923 # Decree 5,539 <http://pcdsh01.on.br/DecHV5539.gif> (2005-09-19),
924 # adopted by the same states as before.
925 Rule Brazil 2005 only - Oct 16 0:00 1:00 S
926 # Decree 5,920 <http://pcdsh01.on.br/DecHV5920.gif> (2006-10-03),
927 # adopted by the same states as before.
928 Rule Brazil 2006 only - Nov 5 0:00 1:00 S
929 Rule Brazil 2007 only - Feb 25 0:00 0 -
930 # Decree 6,212 <http://pcdsh01.on.br/DecHV6212.gif> (2007-09-26),
931 # adopted by the same states as before.
932 Rule Brazil 2007 only - Oct Sun>=8 0:00 1:00 S
933 # From Frederico A. C. Neves (2008-09-10):
934 # According to this decree
935 # http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm
936 # [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the
937 # 3rd Feb Sunday. There is an exception on the return date when this is
938 # the Carnival Sunday then the return date will be the next Sunday...
939 Rule Brazil 2008 max - Oct Sun>=15 0:00 1:00 S
940 Rule Brazil 2008 2011 - Feb Sun>=15 0:00 0 -
941 Rule Brazil 2012 only - Feb Sun>=22 0:00 0 -
942 Rule Brazil 2013 2014 - Feb Sun>=15 0:00 0 -
943 Rule Brazil 2015 only - Feb Sun>=22 0:00 0 -
944 Rule Brazil 2016 2022 - Feb Sun>=15 0:00 0 -
945 Rule Brazil 2023 only - Feb Sun>=22 0:00 0 -
946 Rule Brazil 2024 2025 - Feb Sun>=15 0:00 0 -
947 Rule Brazil 2026 only - Feb Sun>=22 0:00 0 -
948 Rule Brazil 2027 2033 - Feb Sun>=15 0:00 0 -
949 Rule Brazil 2034 only - Feb Sun>=22 0:00 0 -
950 Rule Brazil 2035 2036 - Feb Sun>=15 0:00 0 -
951 Rule Brazil 2037 only - Feb Sun>=22 0:00 0 -
952 # From Arthur David Olson (2008-09-29):
953 # The next is wrong in some years but is better than nothing.
954 Rule Brazil 2038 max - Feb Sun>=15 0:00 0 -
956 # The latest ruleset listed above says that the following states observe DST:
957 # DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP.
959 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
961 # Fernando de Noronha (administratively part of PE)
962 Zone America/Noronha -2:09:40 - LMT 1914
963 -2:00 Brazil FN%sT 1990 Sep 17
964 -2:00 - FNT 1999 Sep 30
965 -2:00 Brazil FN%sT 2000 Oct 15
966 -2:00 - FNT 2001 Sep 13
967 -2:00 Brazil FN%sT 2002 Oct 1
969 # Other Atlantic islands have no permanent settlement.
970 # These include Trindade and Martim Vaz (administratively part of ES),
971 # Rocas Atoll (RN), and the St Peter and St Paul Archipelago (PE).
972 # Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01;
973 # it also included the Penedos.
975 # Amapá (AP), east Pará (PA)
976 # East Pará includes Belém, Marabá, Serra Norte, and São Félix do Xingu.
977 # The division between east and west Pará is the river Xingu.
978 # In the north a very small part from the river Javary (now Jari I guess,
979 # the border with Amapá) to the Amazon, then to the Xingu.
980 Zone America/Belem -3:13:56 - LMT 1914
981 -3:00 Brazil BR%sT 1988 Sep 12
985 # West Pará includes Altamira, Óbidos, Prainha, Oriximiná, and Santarém.
986 Zone America/Santarem -3:38:48 - LMT 1914
987 -4:00 Brazil AM%sT 1988 Sep 12
988 -4:00 - AMT 2008 Jun 24 0:00
991 # Maranhão (MA), Piauí (PI), Ceará (CE), Rio Grande do Norte (RN),
993 Zone America/Fortaleza -2:34:00 - LMT 1914
994 -3:00 Brazil BR%sT 1990 Sep 17
995 -3:00 - BRT 1999 Sep 30
996 -3:00 Brazil BR%sT 2000 Oct 22
997 -3:00 - BRT 2001 Sep 13
998 -3:00 Brazil BR%sT 2002 Oct 1
1001 # Pernambuco (PE) (except Atlantic islands)
1002 Zone America/Recife -2:19:36 - LMT 1914
1003 -3:00 Brazil BR%sT 1990 Sep 17
1004 -3:00 - BRT 1999 Sep 30
1005 -3:00 Brazil BR%sT 2000 Oct 15
1006 -3:00 - BRT 2001 Sep 13
1007 -3:00 Brazil BR%sT 2002 Oct 1
1011 Zone America/Araguaina -3:12:48 - LMT 1914
1012 -3:00 Brazil BR%sT 1990 Sep 17
1013 -3:00 - BRT 1995 Sep 14
1014 -3:00 Brazil BR%sT 2003 Sep 24
1015 -3:00 - BRT 2012 Oct 21
1016 -3:00 Brazil BR%sT 2013 Sep
1019 # Alagoas (AL), Sergipe (SE)
1020 Zone America/Maceio -2:22:52 - LMT 1914
1021 -3:00 Brazil BR%sT 1990 Sep 17
1022 -3:00 - BRT 1995 Oct 13
1023 -3:00 Brazil BR%sT 1996 Sep 4
1024 -3:00 - BRT 1999 Sep 30
1025 -3:00 Brazil BR%sT 2000 Oct 22
1026 -3:00 - BRT 2001 Sep 13
1027 -3:00 Brazil BR%sT 2002 Oct 1
1031 # There are too many Salvadors elsewhere, so use America/Bahia instead
1032 # of America/Salvador.
1033 Zone America/Bahia -2:34:04 - LMT 1914
1034 -3:00 Brazil BR%sT 2003 Sep 24
1035 -3:00 - BRT 2011 Oct 16
1036 -3:00 Brazil BR%sT 2012 Oct 21
1039 # Goiás (GO), Distrito Federal (DF), Minas Gerais (MG),
1040 # Espírito Santo (ES), Rio de Janeiro (RJ), São Paulo (SP), Paraná (PR),
1041 # Santa Catarina (SC), Rio Grande do Sul (RS)
1042 Zone America/Sao_Paulo -3:06:28 - LMT 1914
1043 -3:00 Brazil BR%sT 1963 Oct 23 0:00
1044 -3:00 1:00 BRST 1964
1047 # Mato Grosso do Sul (MS)
1048 Zone America/Campo_Grande -3:38:28 - LMT 1914
1052 Zone America/Cuiaba -3:44:20 - LMT 1914
1053 -4:00 Brazil AM%sT 2003 Sep 24
1054 -4:00 - AMT 2004 Oct 1
1058 Zone America/Porto_Velho -4:15:36 - LMT 1914
1059 -4:00 Brazil AM%sT 1988 Sep 12
1063 Zone America/Boa_Vista -4:02:40 - LMT 1914
1064 -4:00 Brazil AM%sT 1988 Sep 12
1065 -4:00 - AMT 1999 Sep 30
1066 -4:00 Brazil AM%sT 2000 Oct 15
1069 # east Amazonas (AM): Boca do Acre, Jutaí, Manaus, Floriano Peixoto
1070 # The great circle line from Tabatinga to Porto Acre divides
1071 # east from west Amazonas.
1072 Zone America/Manaus -4:00:04 - LMT 1914
1073 -4:00 Brazil AM%sT 1988 Sep 12
1074 -4:00 - AMT 1993 Sep 28
1075 -4:00 Brazil AM%sT 1994 Sep 22
1078 # west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant,
1079 # Eirunepé, Envira, Ipixuna
1080 Zone America/Eirunepe -4:39:28 - LMT 1914
1081 -5:00 Brazil AC%sT 1988 Sep 12
1082 -5:00 - ACT 1993 Sep 28
1083 -5:00 Brazil AC%sT 1994 Sep 22
1084 -5:00 - ACT 2008 Jun 24 0:00
1085 -4:00 - AMT 2013 Nov 10
1089 Zone America/Rio_Branco -4:31:12 - LMT 1914
1090 -5:00 Brazil AC%sT 1988 Sep 12
1091 -5:00 - ACT 2008 Jun 24 0:00
1092 -4:00 - AMT 2013 Nov 10
1097 # From Paul Eggert (2015-04-03):
1098 # Shanks & Pottenger says America/Santiago introduced standard time in
1099 # 1890 and rounds its UTC offset to 70W40; guess that in practice this
1100 # was the same offset as in 1916-1919. It also says Pacific/Easter
1101 # standardized on 109W22 in 1890; assume this didn't change the clocks.
1103 # Dates for America/Santiago from 1910 to 2004 are primarily from
1104 # the following source, cited by Oscar van Vlijmen (2006-10-08):
1106 # http://www.webexhibits.org/daylightsaving/chile.html
1107 # This contains a copy of a this official table:
1108 # Cambios en la hora oficial de Chile desde 1900 (retrieved 2008-03-30)
1109 # http://web.archive.org/web/20080330200901/http://www.horaoficial.cl/cambio.htm
1110 # [1] needs several corrections, though.
1112 # The first set of corrections is from:
1113 # [2] History of the Official Time of Chile
1114 # http://www.horaoficial.cl/ing/horaof_ing.html (retrieved 2012-03-06). See:
1115 # http://web.archive.org/web/20120306042032/http://www.horaoficial.cl/ing/horaof_ing.html
1116 # This is an English translation of:
1117 # Historia de la hora oficial de Chile (retrieved 2012-10-24). See:
1118 # http://web.archive.org/web/20121024234627/http://www.horaoficial.cl/horaof.htm
1119 # A fancier Spanish version (requiring mouse-clicking) is at:
1120 # http://www.horaoficial.cl/historia_hora.html
1121 # Conflicts between [1] and [2] were resolved as follows:
1123 # - [1] says the 1910 transition was Jan 1, [2] says Jan 10 and cites
1124 # Boletín No. 1, Aviso No. 1 (1910). Go with [2].
1126 # - [1] says SMT was -4:42:45, [2] says Chile's official time from
1127 # 1916 to 1919 was -4:42:46.3, the meridian of Chile's National
1128 # Astronomical Observatory (OAN), then located in what is now
1129 # Quinta Normal in Santiago. Go with [2], rounding it to -4:42:46.
1131 # - [1] says the 1918 transition was Sep 1, [2] says Sep 10 and cites
1132 # Boletín No. 22, Aviso No. 129/1918 (1918-08-23). Go with [2].
1134 # - [1] does not give times for transitions; assume they occur
1135 # at midnight mainland time, the current common practice. However,
1136 # go with [2]'s specification of 23:00 for the 1947-05-21 transition.
1138 # Another correction to [1] is from Jesper Nørgaard Welen, who
1139 # wrote (2006-10-08), "I think that there are some obvious mistakes in
1140 # the suggested link from Oscar van Vlijmen,... for instance entry 66
1141 # says that GMT-4 ended 1990-09-12 while entry 67 only begins GMT-3 at
1142 # 1990-09-15 (they should have been 1990-09-15 and 1990-09-16
1143 # respectively), but anyhow it clears up some doubts too."
1145 # Data for Pacific/Easter from 1910 through 1967 come from Shanks &
1146 # Pottenger. After that, for lack of better info assume
1147 # Pacific/Easter is always two hours behind America/Santiago;
1148 # this is known to work for DST transitions starting in 2008 and
1149 # may well be true for earlier transitions.
1151 # From Eduardo Krell (1995-10-19):
1152 # The law says to switch to DST at midnight [24:00] on the second SATURDAY
1153 # of October.... The law is the same for March and October.
1155 # Because of the drought this year, the government decided to go into
1156 # DST earlier (saturday 9/26 at 24:00). This is a one-time change only ...
1157 # (unless there's another dry season next year, I guess).
1159 # From Julio I. Pacheco Troncoso (1999-03-18):
1160 # Because of the same drought, the government decided to end DST later,
1161 # on April 3, (one-time change).
1163 # From Germán Poo-Caamaño (2008-03-03):
1164 # Due to drought, Chile extends Daylight Time in three weeks. This
1165 # is one-time change (Saturday 3/29 at 24:00 for America/Santiago
1166 # and Saturday 3/29 at 22:00 for Pacific/Easter)
1167 # The Supreme Decree is located at
1168 # http://www.shoa.cl/servicios/supremo316.pdf
1170 # From José Miguel Garrido (2008-03-05):
1171 # http://www.shoa.cl/noticias/2008/04hora/hora.htm
1173 # From Angel Chiang (2010-03-04):
1174 # Subject: DST in Chile exceptionally extended to 3 April due to earthquake
1175 # http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098
1177 # From Arthur David Olson (2010-03-06):
1178 # Angel Chiang's message confirmed by Julio Pacheco; Julio provided a patch.
1180 # From Glenn Eychaner (2011-03-28):
1181 # http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E}
1183 # Chile's clocks will go back an hour this year on the 7th of May instead
1184 # of this Saturday. They will go forward again the 3rd Saturday in
1185 # August, not in October as they have since 1968.
1187 # From Mauricio Parada (2012-02-22), translated by Glenn Eychaner (2012-02-23):
1188 # As stated in the website of the Chilean Energy Ministry
1189 # http://www.minenergia.cl/ministerio/noticias/generales/gobierno-anuncia-fechas-de-cambio-de.html
1190 # The Chilean Government has decided to postpone the entrance into winter time
1191 # (to leave DST) from March 11 2012 to April 28th 2012....
1192 # Quote from the website communication:
1194 # 6. For the year 2012, the dates of entry into winter time will be as follows:
1195 # a. Saturday April 28, 2012, clocks should go back 60 minutes; that is, at
1196 # 23:59:59, instead of passing to 0:00, the time should be adjusted to be 23:00
1198 # b. Saturday, September 1, 2012, clocks should go forward 60 minutes; that is,
1199 # at 23:59:59, instead of passing to 0:00, the time should be adjusted to be
1200 # 01:00 on September 2.
1202 # From Steffen Thorsen (2013-02-15):
1203 # According to several news sources, Chile has extended DST this year,
1204 # they will end DST later and start DST earlier than planned. They
1205 # hope to save energy. The new end date is 2013-04-28 00:00 and new
1206 # start date is 2013-09-08 00:00....
1207 # http://www.gob.cl/informa/2013/02/15/gobierno-anuncia-fechas-de-cambio-de-hora-para-el-ano-2013.htm
1209 # From José Miguel Garrido (2014-02-19):
1210 # Today appeared in the Diario Oficial a decree amending the time change
1212 # DST End: last Saturday of April 2014 (Sun 27 Apr 2014 03:00 UTC)
1213 # DST Start: first Saturday of September 2014 (Sun 07 Sep 2014 04:00 UTC)
1214 # http://www.diariooficial.interior.gob.cl//media/2014/02/19/do-20140219.pdf
1216 # From Eduardo Romero Urra (2015-03-03):
1217 # Today has been published officially that Chile will use the DST time
1218 # permanently until March 25 of 2017
1219 # http://www.diariooficial.interior.gob.cl/media/2015/03/03/1-large.jpg
1221 # From Paul Eggert (2015-03-03):
1222 # For now, assume that the extension will persist indefinitely.
1224 # From Juan Correa (2016-03-18):
1225 # The decree regarding DST has been published in today's Official Gazette:
1226 # http://www.diariooficial.interior.gob.cl/versiones-anteriores/do/20160318/
1227 # http://www.leychile.cl/Navegar?idNorma=1088502
1228 # It does consider the second Saturday of May and August as the dates
1229 # for the transition; and it lists DST dates until 2019, but I think
1230 # this scheme will stick.
1232 # From Paul Eggert (2016-03-18):
1233 # For now, assume the pattern holds for the indefinite future.
1234 # The decree says transitions occur at 24:00; in practice this appears
1235 # to mean 24:00 mainland time, not 24:00 local time, so that Easter
1236 # Island is always two hours behind the mainland.
1238 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1239 Rule Chile 1927 1931 - Sep 1 0:00 1:00 S
1240 Rule Chile 1928 1932 - Apr 1 0:00 0 -
1241 Rule Chile 1968 only - Nov 3 4:00u 1:00 S
1242 Rule Chile 1969 only - Mar 30 3:00u 0 -
1243 Rule Chile 1969 only - Nov 23 4:00u 1:00 S
1244 Rule Chile 1970 only - Mar 29 3:00u 0 -
1245 Rule Chile 1971 only - Mar 14 3:00u 0 -
1246 Rule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 S
1247 Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 -
1248 Rule Chile 1973 only - Sep 30 4:00u 1:00 S
1249 Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 S
1250 Rule Chile 1987 only - Apr 12 3:00u 0 -
1251 Rule Chile 1988 1990 - Mar Sun>=9 3:00u 0 -
1252 Rule Chile 1988 1989 - Oct Sun>=9 4:00u 1:00 S
1253 Rule Chile 1990 only - Sep 16 4:00u 1:00 S
1254 Rule Chile 1991 1996 - Mar Sun>=9 3:00u 0 -
1255 Rule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 S
1256 Rule Chile 1997 only - Mar 30 3:00u 0 -
1257 Rule Chile 1998 only - Mar Sun>=9 3:00u 0 -
1258 Rule Chile 1998 only - Sep 27 4:00u 1:00 S
1259 Rule Chile 1999 only - Apr 4 3:00u 0 -
1260 Rule Chile 1999 2010 - Oct Sun>=9 4:00u 1:00 S
1261 Rule Chile 2000 2007 - Mar Sun>=9 3:00u 0 -
1262 # N.B.: the end of March 29 in Chile is March 30 in Universal time,
1263 # which is used below in specifying the transition.
1264 Rule Chile 2008 only - Mar 30 3:00u 0 -
1265 Rule Chile 2009 only - Mar Sun>=9 3:00u 0 -
1266 Rule Chile 2010 only - Apr Sun>=1 3:00u 0 -
1267 Rule Chile 2011 only - May Sun>=2 3:00u 0 -
1268 Rule Chile 2011 only - Aug Sun>=16 4:00u 1:00 S
1269 Rule Chile 2012 2014 - Apr Sun>=23 3:00u 0 -
1270 Rule Chile 2012 2014 - Sep Sun>=2 4:00u 1:00 S
1271 Rule Chile 2016 max - May Sun>=9 3:00u 0 -
1272 Rule Chile 2016 max - Aug Sun>=9 4:00u 1:00 S
1273 # IATA SSIM anomalies: (1992-02) says 1992-03-14;
1274 # (1996-09) says 1998-03-08. Ignore these.
1275 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1276 Zone America/Santiago -4:42:46 - LMT 1890
1277 -4:42:46 - SMT 1910 Jan 10 # Santiago Mean Time
1278 -5:00 - CLT 1916 Jul 1 # Chile Time
1279 -4:42:46 - SMT 1918 Sep 10
1280 -4:00 - CLT 1919 Jul 1
1281 -4:42:46 - SMT 1927 Sep 1
1282 -5:00 Chile CL%sT 1932 Sep 1
1283 -4:00 - CLT 1942 Jun 1
1284 -5:00 - CLT 1942 Aug 1
1285 -4:00 - CLT 1946 Jul 15
1286 -4:00 1:00 CLST 1946 Sep 1 # central Chile
1287 -4:00 - CLT 1947 Apr 1
1288 -5:00 - CLT 1947 May 21 23:00
1290 Zone Pacific/Easter -7:17:28 - LMT 1890
1291 -7:17:28 - EMT 1932 Sep # Easter Mean Time
1292 -7:00 Chile EAS%sT 1982 Mar 14 3:00u # Easter Time
1295 # Salas y Gómez Island is uninhabited.
1296 # Other Chilean locations, including Juan Fernández Is, Desventuradas Is,
1297 # and Antarctic bases, are like America/Santiago.
1299 # Antarctic base using South American rules
1300 # (See the file 'antarctica' for more.)
1302 # Palmer, Anvers Island, since 1965 (moved 2 miles in 1968)
1304 # From Ethan Dicks (1996-10-06):
1305 # It keeps the same time as Punta Arenas, Chile, because, just like us
1306 # and the South Pole, that's the other end of their supply line....
1307 # I verified with someone who was there that since 1980,
1308 # Palmer has followed Chile. Prior to that, before the Falklands War,
1309 # Palmer used to be supplied from Argentina.
1311 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1312 Zone Antarctica/Palmer 0 - zzz 1965
1313 -4:00 Arg AR%sT 1969 Oct 5
1314 -3:00 Arg AR%sT 1982 May
1319 # Milne gives 4:56:16.4 for Bogotá time in 1899; round to nearest. He writes,
1320 # "A variation of fifteen minutes in the public clocks of Bogota is not rare."
1322 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1323 Rule CO 1992 only - May 3 0:00 1:00 S
1324 Rule CO 1993 only - Apr 4 0:00 0 -
1325 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1326 Zone America/Bogota -4:56:16 - LMT 1884 Mar 13
1327 -4:56:16 - BMT 1914 Nov 23 # Bogotá Mean Time
1328 -5:00 CO CO%sT # Colombia Time
1329 # Malpelo, Providencia, San Andres
1330 # no information; probably like America/Bogota
1334 # Milne gives 4:35:46.9 for Curaçao mean time; round to nearest.
1336 # From Paul Eggert (2006-03-22):
1337 # Shanks & Pottenger say that The Bottom and Philipsburg have been at
1338 # -4:00 since standard time was introduced on 1912-03-02; and that
1339 # Kralendijk and Rincon used Kralendijk Mean Time (-4:33:08) from
1340 # 1912-02-02 to 1965-01-01. The former is dubious, since S&P also say
1341 # Saba Island has been like Curaçao.
1342 # This all predates our 1970 cutoff, though.
1344 # By July 2007 Curaçao and St Maarten are planned to become
1345 # associated states within the Netherlands, much like Aruba;
1346 # Bonaire, Saba and St Eustatius would become directly part of the
1347 # Netherlands as Kingdom Islands. This won't affect their time zones
1348 # though, as far as we know.
1350 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1351 Zone America/Curacao -4:35:47 - LMT 1912 Feb 12 # Willemstad
1352 -4:30 - ANT 1965 # Netherlands Antilles Time
1355 # From Arthur David Olson (2011-06-15):
1356 # use links for places with new iso3166 codes.
1357 # The name "Lower Prince's Quarter" is both longer than fourteen characters
1358 # and contains an apostrophe; use "Lower_Princes" below.
1360 Link America/Curacao America/Lower_Princes # Sint Maarten
1361 Link America/Curacao America/Kralendijk # Caribbean Netherlands
1365 # Milne says the Central and South American Telegraph Company used -5:24:15.
1367 # From Paul Eggert (2007-03-04):
1368 # Apparently Ecuador had a failed experiment with DST in 1992.
1369 # <http://midena.gov.ec/content/view/1261/208/> (2007-02-27) and
1370 # <http://www.hoy.com.ec/NoticiaNue.asp?row_id=249856> (2006-11-06) both
1371 # talk about "hora Sixto". Leave this alone for now, as we have no data.
1373 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1374 Zone America/Guayaquil -5:19:20 - LMT 1890
1375 -5:14:00 - QMT 1931 # Quito Mean Time
1376 -5:00 - ECT # Ecuador Time
1377 Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno
1379 -6:00 - GALT # Galápagos Time
1383 # From Paul Eggert (2006-03-22):
1384 # Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except
1385 # the IATA gives 1996-09-08. Go with Shanks & Pottenger.
1387 # From Falkland Islands Government Office, London (2001-01-22)
1388 # via Jesper Nørgaard:
1389 # ... the clocks revert back to Local Mean Time at 2 am on Sunday 15
1390 # April 2001 and advance one hour to summer time at 2 am on Sunday 2
1391 # September. It is anticipated that the clocks will revert back at 2
1392 # am on Sunday 21 April 2002 and advance to summer time at 2 am on
1393 # Sunday 1 September.
1395 # From Rives McDow (2001-02-13):
1397 # I have communicated several times with people there, and the last
1398 # time I had communications that was helpful was in 1998. Here is
1399 # what was said then:
1401 # "The general rule was that Stanley used daylight saving and the Camp
1402 # did not. However for various reasons many people in the Camp have
1403 # started to use daylight saving (known locally as 'Stanley Time')
1404 # There is no rule as to who uses daylight saving - it is a matter of
1405 # personal choice and so it is impossible to draw a map showing who
1406 # uses it and who does not. Any list would be out of date as soon as
1407 # it was produced. This year daylight saving ended on April 18/19th
1408 # and started again on September 12/13th. I do not know what the rule
1409 # is, but can find out if you like. We do not change at the same time
1412 # I did have in my notes that the rule was "Second Saturday in Sep at
1413 # 0:00 until third Saturday in Apr at 0:00". I think that this does
1414 # not agree in some cases with Shanks; is this true?
1416 # Also, there is no mention in the list that some areas in the
1417 # Falklands do not use DST. I have found in my communications there
1418 # that these areas are on the western half of East Falkland and all of
1419 # West Falkland. Stanley is the only place that consistently observes
1420 # DST. Again, as in other places in the world, the farmers don't like
1421 # it. West Falkland is almost entirely sheep farmers.
1423 # I know one lady there that keeps a list of which farm keeps DST and
1424 # which doesn't each year. She runs a shop in Stanley, and says that
1425 # the list changes each year. She uses it to communicate to her
1426 # customers, catching them when they are home for lunch or dinner.
1428 # From Paul Eggert (2001-03-05):
1429 # For now, we'll just record the time in Stanley, since we have no
1432 # From Steffen Thorsen (2011-04-01):
1433 # The Falkland Islands will not turn back clocks this winter, but stay on
1434 # daylight saving time.
1437 # http://www.falklandnews.com/public/story.cfm?get=5914&source=3
1439 # We have gotten this confirmed by a clerk of the legislative assembly:
1440 # Normally the clocks revert to Local Mean Time (UTC/GMT -4 hours) on the
1441 # third Sunday of April at 0200hrs and advance to Summer Time (UTC/GMT -3
1442 # hours) on the first Sunday of September at 0200hrs.
1444 # IMPORTANT NOTE: During 2011, on a trial basis, the Falkland Islands
1445 # will not revert to local mean time, but clocks will remain on Summer
1446 # time (UTC/GMT - 3 hours) throughout the whole of 2011. Any long term
1447 # change to local time following the trial period will be notified.
1449 # From Andrew Newman (2012-02-24)
1450 # A letter from Justin McPhee, Chief Executive,
1451 # Cable & Wireless Falkland Islands (dated 2012-02-22)
1453 # The current Atlantic/Stanley entry under South America expects the
1454 # clocks to go back to standard Falklands Time (FKT) on the 15th April.
1455 # The database entry states that in 2011 Stanley was staying on fixed
1456 # summer time on a trial basis only. FIG need to contact IANA and/or
1457 # the maintainers of the database to inform them we're adopting
1458 # the same policy this year and suggest recommendations for future years.
1460 # For now we will assume permanent summer time for the Falklands
1461 # until advised differently (to apply for 2012 and beyond, after the 2011
1462 # experiment was apparently successful.)
1463 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1464 Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S
1465 Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 -
1466 Rule Falk 1939 only - Oct 1 0:00 1:00 S
1467 Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S
1468 Rule Falk 1943 only - Jan 1 0:00 0 -
1469 Rule Falk 1983 only - Sep lastSun 0:00 1:00 S
1470 Rule Falk 1984 1985 - Apr lastSun 0:00 0 -
1471 Rule Falk 1984 only - Sep 16 0:00 1:00 S
1472 Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S
1473 Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 -
1474 Rule Falk 2001 2010 - Apr Sun>=15 2:00 0 -
1475 Rule Falk 2001 2010 - Sep Sun>=1 2:00 1:00 S
1476 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1477 Zone Atlantic/Stanley -3:51:24 - LMT 1890
1478 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time
1479 -4:00 Falk FK%sT 1983 May # Falkland Is Time
1480 -3:00 Falk FK%sT 1985 Sep 15
1481 -4:00 Falk FK%sT 2010 Sep 5 2:00
1485 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1486 Zone America/Cayenne -3:29:20 - LMT 1911 Jul
1487 -4:00 - GFT 1967 Oct # French Guiana Time
1491 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1492 Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown
1493 -3:45 - GBGT 1966 May 26 # Br Guiana Time
1494 -3:45 - GYT 1975 Jul 31 # Guyana Time
1496 # IATA SSIM (1996-06) says -4:00. Assume a 1991 switch.
1501 # From Paul Eggert (2006-03-22):
1502 # Shanks & Pottenger say that spring transitions are 01:00 -> 02:00,
1503 # and autumn transitions are 00:00 -> 23:00. Go with pre-1999
1504 # editions of Shanks, and with the IATA, who say transitions occur at 00:00.
1506 # From Waldemar Villamayor-Venialbo (2013-09-20):
1507 # No time of the day is established for the adjustment, so people normally
1508 # adjust their clocks at 0 hour of the given dates.
1510 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1511 Rule Para 1975 1988 - Oct 1 0:00 1:00 S
1512 Rule Para 1975 1978 - Mar 1 0:00 0 -
1513 Rule Para 1979 1991 - Apr 1 0:00 0 -
1514 Rule Para 1989 only - Oct 22 0:00 1:00 S
1515 Rule Para 1990 only - Oct 1 0:00 1:00 S
1516 Rule Para 1991 only - Oct 6 0:00 1:00 S
1517 Rule Para 1992 only - Mar 1 0:00 0 -
1518 Rule Para 1992 only - Oct 5 0:00 1:00 S
1519 Rule Para 1993 only - Mar 31 0:00 0 -
1520 Rule Para 1993 1995 - Oct 1 0:00 1:00 S
1521 Rule Para 1994 1995 - Feb lastSun 0:00 0 -
1522 Rule Para 1996 only - Mar 1 0:00 0 -
1523 # IATA SSIM (2000-02) says 1999-10-10; ignore this for now.
1524 # From Steffen Thorsen (2000-10-02):
1525 # I have three independent reports that Paraguay changed to DST this Sunday
1528 # Translated by Gwillim Law (2001-02-27) from
1529 # Noticias, a daily paper in Asunción, Paraguay (2000-10-01):
1530 # http://www.diarionoticias.com.py/011000/nacional/naciona1.htm
1531 # Starting at 0:00 today, the clock will be set forward 60 minutes, in
1532 # fulfillment of Decree No. 7,273 of the Executive Power.... The time change
1533 # system has been operating for several years. Formerly there was a separate
1534 # decree each year; the new law has the same effect, but permanently. Every
1535 # year, the time will change on the first Sunday of October; likewise, the
1536 # clock will be set back on the first Sunday of March.
1538 Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S
1539 # IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger.
1540 Rule Para 1997 only - Feb lastSun 0:00 0 -
1541 # Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but
1542 # (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27).
1543 Rule Para 1998 2001 - Mar Sun>=1 0:00 0 -
1544 # From Rives McDow (2002-02-28):
1545 # A decree was issued in Paraguay (No. 16350) on 2002-02-26 that changed the
1546 # dst method to be from the first Sunday in September to the first Sunday in
1548 Rule Para 2002 2004 - Apr Sun>=1 0:00 0 -
1549 Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 S
1551 # From Jesper Nørgaard Welen (2005-01-02):
1552 # There are several sources that claim that Paraguay made
1553 # a timezone rule change in autumn 2004.
1554 # From Steffen Thorsen (2005-01-05):
1555 # Decree 1,867 (2004-03-05)
1556 # From Carlos Raúl Perasso via Jesper Nørgaard Welen (2006-10-13)
1557 # http://www.presidencia.gov.py/decretos/D1867.pdf
1558 Rule Para 2004 2009 - Oct Sun>=15 0:00 1:00 S
1559 Rule Para 2005 2009 - Mar Sun>=8 0:00 0 -
1560 # From Carlos Raúl Perasso (2010-02-18):
1561 # By decree number 3958 issued yesterday
1562 # http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf
1563 # Paraguay changes its DST schedule, postponing the March rule to April and
1564 # modifying the October date. The decree reads:
1566 # Art. 1. It is hereby established that from the second Sunday of the month of
1567 # April of this year (2010), the official time is to be set back 60 minutes,
1568 # and that on the first Sunday of the month of October, it is to be set
1569 # forward 60 minutes, in all the territory of the Paraguayan Republic.
1571 Rule Para 2010 max - Oct Sun>=1 0:00 1:00 S
1572 Rule Para 2010 2012 - Apr Sun>=8 0:00 0 -
1574 # From Steffen Thorsen (2013-03-07):
1575 # Paraguay will end DST on 2013-03-24 00:00....
1576 # http://www.ande.gov.py/interna.php?id=1075
1578 # From Carlos Raúl Perasso (2013-03-15):
1579 # The change in Paraguay is now final. Decree number 10780
1580 # http://www.presidencia.gov.py/uploads/pdf/presidencia-3b86ff4b691c79d4f5927ca964922ec74772ce857c02ca054a52a37b49afc7fb.pdf
1581 # From Carlos Raúl Perasso (2014-02-28):
1582 # Decree 1264 can be found at:
1583 # http://www.presidencia.gov.py/archivos/documentos/DECRETO1264_ey9r8zai.pdf
1584 Rule Para 2013 max - Mar Sun>=22 0:00 0 -
1586 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1587 Zone America/Asuncion -3:50:40 - LMT 1890
1588 -3:50:40 - AMT 1931 Oct 10 # Asunción Mean Time
1589 -4:00 - PYT 1972 Oct # Paraguay Time
1590 -3:00 - PYT 1974 Apr
1595 # From Evelyn C. Leeper via Mark Brader (2003-10-26)
1596 # <news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net>:
1597 # When we were in Peru in 1985-1986, they apparently switched over
1598 # sometime between December 29 and January 3 while we were on the Amazon.
1600 # From Paul Eggert (2006-03-22):
1601 # Shanks & Pottenger don't have this transition. Assume 1986 was like 1987.
1603 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1604 Rule Peru 1938 only - Jan 1 0:00 1:00 S
1605 Rule Peru 1938 only - Apr 1 0:00 0 -
1606 Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S
1607 Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 -
1608 Rule Peru 1986 1987 - Jan 1 0:00 1:00 S
1609 Rule Peru 1986 1987 - Apr 1 0:00 0 -
1610 Rule Peru 1990 only - Jan 1 0:00 1:00 S
1611 Rule Peru 1990 only - Apr 1 0:00 0 -
1612 # IATA is ambiguous for 1993/1995; go with Shanks & Pottenger.
1613 Rule Peru 1994 only - Jan 1 0:00 1:00 S
1614 Rule Peru 1994 only - Apr 1 0:00 0 -
1615 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1616 Zone America/Lima -5:08:12 - LMT 1890
1617 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time?
1618 -5:00 Peru PE%sT # Peru Time
1621 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1622 Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken
1623 -2:00 - GST # South Georgia Time
1626 # uninhabited; scientific personnel have wintered
1629 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1630 Zone America/Paramaribo -3:40:40 - LMT 1911
1631 -3:40:52 - PMT 1935 # Paramaribo Mean Time
1632 -3:40:36 - PMT 1945 Oct # The capital moved?
1633 -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time
1634 -3:30 - SRT 1984 Oct # Suriname Time
1637 # Trinidad and Tobago
1638 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1639 Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2
1642 # These all agree with Trinidad and Tobago since 1970.
1643 Link America/Port_of_Spain America/Anguilla
1644 Link America/Port_of_Spain America/Antigua
1645 Link America/Port_of_Spain America/Dominica
1646 Link America/Port_of_Spain America/Grenada
1647 Link America/Port_of_Spain America/Guadeloupe
1648 Link America/Port_of_Spain America/Marigot # St Martin (French part)
1649 Link America/Port_of_Spain America/Montserrat
1650 Link America/Port_of_Spain America/St_Barthelemy # St Barthélemy
1651 Link America/Port_of_Spain America/St_Kitts # St Kitts & Nevis
1652 Link America/Port_of_Spain America/St_Lucia
1653 Link America/Port_of_Spain America/St_Thomas # Virgin Islands (US)
1654 Link America/Port_of_Spain America/St_Vincent
1655 Link America/Port_of_Spain America/Tortola # Virgin Islands (UK)
1658 # From Paul Eggert (1993-11-18):
1659 # Uruguay wins the prize for the strangest peacetime manipulation of the rules.
1660 # From Shanks & Pottenger:
1661 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1662 # Whitman gives 1923 Oct 1; go with Shanks & Pottenger.
1663 Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS
1664 Rule Uruguay 1924 1926 - Apr 1 0:00 0 -
1665 Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS
1666 Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS
1667 # Shanks & Pottenger give 1935 Apr 1 0:00 & 1936 Mar 30 0:00; go with Whitman.
1668 Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 -
1669 Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS
1670 Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 -
1671 # Whitman gives 1937 Oct 3; go with Shanks & Pottenger.
1672 Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS
1673 # Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13,
1674 # and 1943 Apr 13 "to present time"; go with Shanks & Pottenger.
1675 Rule Uruguay 1941 only - Aug 1 0:00 0:30 HS
1676 Rule Uruguay 1942 only - Jan 1 0:00 0 -
1677 Rule Uruguay 1942 only - Dec 14 0:00 1:00 S
1678 Rule Uruguay 1943 only - Mar 14 0:00 0 -
1679 Rule Uruguay 1959 only - May 24 0:00 1:00 S
1680 Rule Uruguay 1959 only - Nov 15 0:00 0 -
1681 Rule Uruguay 1960 only - Jan 17 0:00 1:00 S
1682 Rule Uruguay 1960 only - Mar 6 0:00 0 -
1683 Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S
1684 Rule Uruguay 1965 only - Sep 26 0:00 0 -
1685 Rule Uruguay 1966 1967 - Oct 31 0:00 0 -
1686 Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS
1687 Rule Uruguay 1968 1970 - Dec 2 0:00 0 -
1688 Rule Uruguay 1972 only - Apr 24 0:00 1:00 S
1689 Rule Uruguay 1972 only - Aug 15 0:00 0 -
1690 Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS
1691 Rule Uruguay 1974 only - Dec 22 0:00 1:00 S
1692 Rule Uruguay 1976 only - Oct 1 0:00 0 -
1693 Rule Uruguay 1977 only - Dec 4 0:00 1:00 S
1694 Rule Uruguay 1978 only - Apr 1 0:00 0 -
1695 Rule Uruguay 1979 only - Oct 1 0:00 1:00 S
1696 Rule Uruguay 1980 only - May 1 0:00 0 -
1697 Rule Uruguay 1987 only - Dec 14 0:00 1:00 S
1698 Rule Uruguay 1988 only - Mar 14 0:00 0 -
1699 Rule Uruguay 1988 only - Dec 11 0:00 1:00 S
1700 Rule Uruguay 1989 only - Mar 12 0:00 0 -
1701 Rule Uruguay 1989 only - Oct 29 0:00 1:00 S
1702 # Shanks & Pottenger say no DST was observed in 1990/1 and 1991/2,
1703 # and that 1992/3's DST was from 10-25 to 03-01. Go with IATA.
1704 Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 -
1705 Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S
1706 Rule Uruguay 1992 only - Oct 18 0:00 1:00 S
1707 Rule Uruguay 1993 only - Feb 28 0:00 0 -
1708 # From Eduardo Cota (2004-09-20):
1709 # The Uruguayan government has decreed a change in the local time....
1710 # http://www.presidencia.gub.uy/decretos/2004091502.htm
1711 Rule Uruguay 2004 only - Sep 19 0:00 1:00 S
1712 # From Steffen Thorsen (2005-03-11):
1713 # Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to
1714 # save energy ... it was postponed two weeks....
1715 # http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm
1716 Rule Uruguay 2005 only - Mar 27 2:00 0 -
1717 # From Eduardo Cota (2005-09-27):
1718 # http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF
1719 # This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at
1720 # 02:00 local time, official time in Uruguay will be at GMT -2.
1721 Rule Uruguay 2005 only - Oct 9 2:00 1:00 S
1722 Rule Uruguay 2006 only - Mar 12 2:00 0 -
1723 # From Jesper Nørgaard Welen (2006-09-06):
1724 # http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF
1726 # From Steffen Thorsen (2015-06-30):
1727 # ... it looks like they will not be using DST the coming summer:
1728 # http://www.elobservador.com.uy/gobierno-resolvio-que-no-habra-cambio-horario-verano-n656787
1729 # http://www.republica.com.uy/este-ano-no-se-modificara-el-huso-horario-en-uruguay/523760/
1730 # From Paul Eggert (2015-06-30):
1731 # Apparently restaurateurs complained that DST caused people to go to the beach
1732 # instead of out to dinner.
1733 # From Pablo Camargo (2015-07-13):
1734 # http://archivo.presidencia.gub.uy/sci/decretos/2015/06/cons_min_201.pdf
1735 # [dated 2015-06-29; repeals Decree 311/006 dated 2006-09-04]
1736 Rule Uruguay 2006 2014 - Oct Sun>=1 2:00 1:00 S
1737 Rule Uruguay 2007 2015 - Mar Sun>=8 2:00 0 -
1738 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1739 Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28
1740 -3:44:44 - MMT 1920 May 1 # Montevideo MT
1741 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time
1746 # From Paul Eggert (2015-07-28):
1747 # For the 1965 transition see Gaceta Oficial No. 27.619 (1964-12-15), p 205.533
1748 # http://www.pgr.gob.ve/dmdocuments/1964/27619.pdf
1750 # From John Stainforth (2007-11-28):
1751 # ... the change for Venezuela originally expected for 2007-12-31 has
1752 # been brought forward to 2007-12-09. The official announcement was
1753 # published today in the "Gaceta Oficial de la República Bolivariana
1754 # de Venezuela, número 38.819" (official document for all laws or
1755 # resolution publication)
1756 # http://www.globovision.com/news.php?nid=72208
1758 # From Alexander Krivenyshev (2016-04-15):
1759 # https://actualidad.rt.com/actualidad/204758-venezuela-modificar-huso-horario-sequia-elnino
1761 # From Paul Eggert (2016-04-15):
1762 # Clocks advance 30 minutes on 2016-05-01 at 02:30. See:
1763 # Barboza AD. Huso horario en Venezuela volverá a 4 horas menos con
1764 # respecto al "Greenwich". Panorama 2016-04-15 12:20 -0430.
1765 # http://www.panorama.com.ve/ciudad/Huso-horario-en-Venezuela-volvera-a-4-horas-menos-con-respecto-al-Greenwich-20160415-0032.html
1767 # "'Venezuela's new time-zone: hours without light, hours without water,
1768 # hours of presidential broadcasts, hours of lines," quipped comedian
1769 # Jean Mary Curro ...". See: Cawthorne A, Kai D. Venezuela scraps
1770 # half-hour time difference set by Chavez. Reuters 2016-04-15 14:50 -0400
1771 # http://www.reuters.com/article/us-venezuela-timezone-idUSKCN0XC2BE
1773 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1774 Zone America/Caracas -4:27:44 - LMT 1890
1775 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time?
1776 -4:30 - VET 1965 Jan 1 0:00 # Venezuela T.
1777 -4:00 - VET 2007 Dec 9 3:00
1778 -4:30 - VET 2016 May 1 2:30
projects / dragonfly.git / blob