1 # @(#)southamerica 8.19
4 # This data is by no means authoritative; if you think you know better,
5 # go ahead and edit the file (and please send any changes to
6 # tz@elsie.nci.nih.gov for general use in the future).
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 # Gwillim Law writes that a good source
14 # for recent time zone data is the International Air Transport
15 # Association's Standard Schedules Information Manual (IATA SSIM),
16 # published semiannually. Law sent in several helpful summaries
17 # of the IATA's data after 1990.
19 # Except where otherwise noted, Shanks & Pottenger is the source for
20 # entries through 1990, and IATA SSIM is the source for entries afterwards.
22 # Earlier editions of these tables used the North American style (e.g. ARST and
23 # ARDT for Argentine Standard and Daylight Time), but the following quote
24 # suggests that it's better to use European style (e.g. ART and ARST).
25 # I suggest the use of _Summer time_ instead of the more cumbersome
26 # _daylight-saving time_. _Summer time_ seems to be in general use
27 # in Europe and South America.
28 # -- E O Cutler, _New York Times_ (1937-02-14), quoted in
29 # H L Mencken, _The American Language: Supplement I_ (1960), p 466
31 # Earlier editions of these tables also used the North American style
32 # for time zones in Brazil, but this was incorrect, as Brazilians say
33 # "summer time". Reinaldo Goulart, a Sao Paulo businessman active in
34 # the railroad sector, writes (1999-07-06):
35 # The subject of time zones is currently a matter of discussion/debate in
36 # Brazil. Let's say that "the Brasilia time" is considered the
37 # "official time" because Brasilia is the capital city.
38 # The other three time zones are called "Brasilia time "minus one" or
39 # "plus one" or "plus two". As far as I know there is no such
40 # name/designation as "Eastern Time" or "Central Time".
41 # So I invented the following (English-language) abbreviations for now.
42 # Corrections are welcome!
44 # -2:00 FNT FNST Fernando de Noronha
45 # -3:00 BRT BRST Brasilia
46 # -4:00 AMT AMST Amazon
49 ###############################################################################
51 ###############################################################################
55 # From Bob Devine (1988-01-28):
56 # Argentina: first Sunday in October to first Sunday in April since 1976.
57 # Double Summer time from 1969 to 1974. Switches at midnight.
59 # From U. S. Naval Observatory (1988-01-199):
60 # ARGENTINA 3 H BEHIND UTC
62 # From Hernan G. Otero (1995-06-26):
63 # I am sending modifications to the Argentine time zone table...
64 # AR was chosen because they are the ISO letters that represent Argentina.
66 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
67 Rule Arg 1930 only - Dec 1 0:00 1:00 S
68 Rule Arg 1931 only - Apr 1 0:00 0 -
69 Rule Arg 1931 only - Oct 15 0:00 1:00 S
70 Rule Arg 1932 1940 - Mar 1 0:00 0 -
71 Rule Arg 1932 1939 - Nov 1 0:00 1:00 S
72 Rule Arg 1940 only - Jul 1 0:00 1:00 S
73 Rule Arg 1941 only - Jun 15 0:00 0 -
74 Rule Arg 1941 only - Oct 15 0:00 1:00 S
75 Rule Arg 1943 only - Aug 1 0:00 0 -
76 Rule Arg 1943 only - Oct 15 0:00 1:00 S
77 Rule Arg 1946 only - Mar 1 0:00 0 -
78 Rule Arg 1946 only - Oct 1 0:00 1:00 S
79 Rule Arg 1963 only - Oct 1 0:00 0 -
80 Rule Arg 1963 only - Dec 15 0:00 1:00 S
81 Rule Arg 1964 1966 - Mar 1 0:00 0 -
82 Rule Arg 1964 1966 - Oct 15 0:00 1:00 S
83 Rule Arg 1967 only - Apr 2 0:00 0 -
84 Rule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 S
85 Rule Arg 1968 1969 - Apr Sun>=1 0:00 0 -
86 Rule Arg 1974 only - Jan 23 0:00 1:00 S
87 Rule Arg 1974 only - May 1 0:00 0 -
88 Rule Arg 1988 only - Dec 1 0:00 1:00 S
90 # From Hernan G. Otero (1995-06-26):
91 # These corrections were contributed by InterSoft Argentina S.A.,
92 # obtaining the data from the:
93 # Talleres de Hidrografia Naval Argentina
94 # (Argentine Naval Hydrography Institute)
95 Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 -
96 Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S
98 # From Hernan G. Otero (1995-06-26):
99 # From this moment on, the law that mandated the daylight saving
100 # time corrections was derogated and no more modifications
101 # to the time zones (for daylight saving) are now made.
103 # From Rives McDow (2000-01-10):
104 # On October 3, 1999, 0:00 local, Argentina implemented daylight savings time,
105 # which did not result in the switch of a time zone, as they stayed 9 hours
106 # from the International Date Line.
107 Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 S
108 # From Paul Eggert (2007-12-28):
109 # DST was set to expire on March 5, not March 3, but since it was converted
110 # to standard time on March 3 it's more convenient for us to pretend that
111 # it ended on March 3.
112 Rule Arg 2000 only - Mar 3 0:00 0 -
114 # From Peter Gradelski via Steffen Thorsen (2000-03-01):
115 # We just checked with our Sao Paulo office and they say the government of
116 # Argentina decided not to become one of the countries that go on or off DST.
117 # So Buenos Aires should be -3 hours from GMT at all times.
119 # From Fabian L. Arce Jofre (2000-04-04):
120 # The law that claimed DST for Argentina was derogated by President Fernando
121 # de la Rua on March 2, 2000, because it would make people spend more energy
122 # in the winter time, rather than less. The change took effect on March 3.
124 # From Mariano Absatz (2001-06-06):
125 # one of the major newspapers here in Argentina said that the 1999
126 # Timezone Law (which never was effectively applied) will (would?) be
127 # in effect.... The article is at
128 # http://ar.clarin.com/diario/2001-06-06/e-01701.htm
129 # ... The Law itself is "Ley No 25155", sanctioned on 1999-08-25, enacted
130 # 1999-09-17, and published 1999-09-21. The official publication is at:
131 # http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF
132 # Regretfully, you have to subscribe (and pay) for the on-line version....
135 # the timezone for Argentina will not change next Sunday.
136 # Apparently it will do so on Sunday 24th....
137 # http://ar.clarin.com/diario/2001-06-12/s-03501.htm
140 # Last Friday (yes, the last working day before the date of the change), the
141 # Senate annulled the 1999 law that introduced the changes later postponed.
142 # http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm
143 # It remains the vote of the Deputies..., but it will be the same....
144 # This kind of things had always been done this way in Argentina.
145 # We are still -03:00 all year round in all of the country.
147 # From Steffen Thorsen (2007-12-21):
148 # A user (Leonardo Chaim) reported that Argentina will adopt DST....
149 # all of the country (all Zone-entries) are affected. News reports like
150 # http://www.lanacion.com.ar/opinion/nota.asp?nota_id=973037 indicate
151 # that Argentina will use DST next year as well, from October to
152 # March, although exact rules are not given.
154 # From Jesper Norgaard Welen (2007-12-26)
155 # The last hurdle of Argentina DST is over, the proposal was approved in
156 # the lower chamber too (Deputados) with a vote 192 for and 2 against.
157 # By the way thanks to Mariano Absatz and Daniel Mario Vega for the link to
158 # the original scanned proposal, where the dates and the zero hours are
159 # clear and unambiguous...This is the article about final approval:
160 # <a href="http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996">
161 # http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996
164 # From Paul Eggert (2007-12-22):
165 # For dates after mid-2008, the following rules are my guesses and
166 # are quite possibly wrong, but are more likely than no DST at all.
167 Rule Arg 2007 only - Dec 30 0:00 1:00 S
168 Rule Arg 2008 max - Mar Sun>=15 0:00 0 -
169 Rule Arg 2008 max - Oct Sun>=1 0:00 1:00 S
171 # From Mariano Absatz (2004-05-21):
172 # Today it was officially published that the Province of Mendoza is changing
173 # its timezone this winter... starting tomorrow night....
174 # http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf
175 # From Paul Eggert (2004-05-24):
176 # It's Law No. 7,210. This change is due to a public power emergency, so for
177 # now we'll assume it's for this year only.
179 # From Paul Eggert (2006-03-22):
180 # <a href="http://www.spicasc.net/horvera.html">
181 # Hora de verano para la Republica Argentina (2003-06-08)
182 # </a> says that standard time in Argentina from 1894-10-31
183 # to 1920-05-01 was -4:16:48.25. Go with this more-precise value
184 # over Shanks & Pottenger.
186 # From Mariano Absatz (2004-06-05):
187 # These media articles from a major newspaper mostly cover the current state:
188 # http://www.lanacion.com.ar/04/05/27/de_604825.asp
189 # http://www.lanacion.com.ar/04/05/28/de_605203.asp
191 # The following eight (8) provinces pulled clocks back to UTC-04:00 at
192 # midnight Monday May 31st. (that is, the night between 05/31 and 06/01).
193 # Apparently, all nine provinces would go back to UTC-03:00 at the same
194 # time in October 17th.
196 # Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz,
197 # Tierra del Fuego, Tucuman.
199 # From Mariano Absatz (2004-06-14):
200 # ... this weekend, the Province of Tucuman decided it'd go back to UTC-03:00
201 # yesterday midnight (that is, at 24:00 Saturday 12th), since the people's
202 # annoyance with the change is much higher than the power savings obtained....
204 # From Gwillim Law (2004-06-14):
205 # http://www.lanacion.com.ar/04/06/10/de_609078.asp ...
206 # "The time change in Tierra del Fuego was a conflicted decision from
207 # the start. The government had decreed that the measure would take
208 # effect on June 1, but a normative error forced the new time to begin
209 # three days earlier, from a Saturday to a Sunday....
210 # Our understanding was that the change was originally scheduled to take place
211 # on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other
212 # provinces). Sunday was May 30, only two days earlier. So the article
213 # contains a contradiction. I would give more credence to the Saturday/Sunday
214 # date than the "three days earlier" phrase, and conclude that Tierra del
215 # Fuego set its clocks back at 2004-05-30 00:00.
217 # From Steffen Thorsen (2004-10-05):
218 # The previous law 7210 which changed the province of Mendoza's time zone
219 # back in May have been modified slightly in a new law 7277, which set the
220 # new end date to 2004-09-26 (original date was 2004-10-17).
221 # http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf
223 # From Mariano Absatz (2004-10-05):
224 # San Juan changed from UTC-03:00 to UTC-04:00 at midnight between
225 # Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00
226 # at midnight between Saturday, July 24th and Sunday, July 25th....
227 # http://www.sanjuan.gov.ar/prensa/archivo/000329.html
228 # http://www.sanjuan.gov.ar/prensa/archivo/000426.html
229 # http://www.sanjuan.gov.ar/prensa/archivo/000441.html
231 # From Alex Krivenyshev (2008-01-17):
232 # Here are articles that Argentina Province San Luis is planning to end DST
233 # as earlier as upcoming Monday January 21, 2008 or February 2008:
235 # Provincia argentina retrasa reloj y marca diferencia con resto del pais
236 # (Argentine Province delayed clock and mark difference with the rest of the
238 # <a href="http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel">
239 # http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel
242 # Es inminente que en San Luis atrasen una hora los relojes
243 # (It is imminent in San Luis clocks one hour delay)
244 # <a href="http://www.lagaceta.com.ar/vernotae.asp?id_nota=253414">
245 # http://www.lagaceta.com.ar/vernotae.asp?id_nota=253414
248 # <a href="http://www.worldtimezone.net/dst_news/dst_news_argentina02.html">
249 # http://www.worldtimezone.net/dst_news/dst_news_argentina02.html
252 # From Jesper Norgaard Welen (2008-01-18):
253 # The page of the San Luis provincial government
254 # <a href="http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812">
255 # http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812
257 # confirms what Alex Krivenyshev has earlier sent to the tz
258 # emailing list about that San Luis plans to return to standard
259 # time much earlier than the rest of the country. It also
260 # confirms that upon request the provinces San Juan and Mendoza
261 # refused to follow San Luis in this change.
263 # The change is supposed to take place Monday the 21.st at 0:00
264 # hours. As far as I understand it if this goes ahead, we need
265 # a new timezone for San Luis (although there are also documented
266 # independent changes in the southamerica file of San Luis in
267 # 1990 and 1991 which has not been confirmed).
269 # From Jesper Norgaard Welen (2008-01-25):
270 # Unfortunately the below page has become defunct, about the San Luis
271 # time change. Perhaps because it now is part of a group of pages "Most
272 # important pages of 2008."
275 # <a href="http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834">
276 # http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834
278 # instead it seems. Or use "Buscador" from the main page of the San Luis
279 # government, and fill in "huso" and click OK, and you will get 3 pages
280 # from which the first one is identical to the above.
282 # From Mariano Absatz (2008-01-28):
283 # I can confirm that the Province of San Luis (and so far only that
284 # province) decided to go back to UTC-3 effective midnight Jan 20th 2008
285 # (that is, Monday 21st at 0:00 is the time the clocks were delayed back
286 # 1 hour), and they intend to keep UTC-3 as their timezone all year round
287 # (that is, unless they change their mind any minute now).
289 # So we'll have to add yet another city to 'southamerica' (I think San
290 # Luis city is the mos populated city in the Province, so it'd be
291 # America/Argentina/San_Luis... of course I can't remember if San Luis's
292 # history of particular changes goes along with Mendoza or San Juan :-(
293 # (I only remember not being able to collect hard facts about San Luis
294 # back in 2004, when these provinces changed to UTC-4 for a few days, I
295 # mailed them personally and never got an answer).
297 # From Arthur David Olson (2008-03-15):
298 # Until there's better information, asssume San Luis was like San Juan
299 # rather than Mendoza (since San Juan has a simpler DST history).
301 # Unless otherwise specified, data are from Shanks & Pottenger through 1992,
302 # from the IATA otherwise. As noted below, Shanks & Pottenger say that
303 # America/Cordoba split into 6 subregions during 1991/1992, but we
304 # haven't verified this yet so for now we'll keep it a single region.
306 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
308 # Buenos Aires (BA), Capital Federal (CF),
309 Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31
310 -4:16:48 - CMT 1920 May # Cordoba Mean Time
312 -4:00 Arg AR%sT 1969 Oct 5
313 -3:00 Arg AR%sT 1999 Oct 3
314 -4:00 Arg AR%sT 2000 Mar 3
317 # Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN), Chaco (CC),
318 # Formosa (FM), Salta (SA), Santiago del Estero (SE), Cordoba (CB),
319 # San Luis (SL), La Pampa (LP), Neuquen (NQ), Rio Negro (RN)
321 # Shanks & Pottenger also make the following claims, which we haven't verified:
322 # - Formosa switched to -3:00 on 1991-01-07.
323 # - Misiones switched to -3:00 on 1990-12-29.
324 # - Chaco switched to -3:00 on 1991-01-04.
325 # - San Luis switched to -4:00 on 1990-03-14, then to -3:00 on 1990-10-15,
326 # then to -4:00 on 1991-03-01, then to -3:00 on 1991-06-01.
327 # - Santiago del Estero switched to -4:00 on 1991-04-01,
328 # then to -3:00 on 1991-04-26.
330 Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31
331 -4:16:48 - CMT 1920 May
333 -4:00 Arg AR%sT 1969 Oct 5
334 -3:00 Arg AR%sT 1991 Mar 3
335 -4:00 - WART 1991 Oct 20
336 -3:00 Arg AR%sT 1999 Oct 3
337 -4:00 Arg AR%sT 2000 Mar 3
341 Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31
342 -4:16:48 - CMT 1920 May
344 -4:00 Arg AR%sT 1969 Oct 5
345 -3:00 Arg AR%sT 1991 Mar 3
346 -4:00 - WART 1991 Oct 20
347 -3:00 Arg AR%sT 1999 Oct 3
348 -4:00 Arg AR%sT 2000 Mar 3
349 -3:00 - ART 2004 Jun 1
350 -4:00 - WART 2004 Jun 13
354 Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31
355 -4:16:48 - CMT 1920 May
357 -4:00 Arg AR%sT 1969 Oct 5
358 -3:00 Arg AR%sT 1991 Mar 1
359 -4:00 - WART 1991 May 7
360 -3:00 Arg AR%sT 1999 Oct 3
361 -4:00 Arg AR%sT 2000 Mar 3
362 -3:00 - ART 2004 Jun 1
363 -4:00 - WART 2004 Jun 20
367 Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31
368 -4:16:48 - CMT 1920 May
370 -4:00 Arg AR%sT 1969 Oct 5
371 -3:00 Arg AR%sT 1991 Mar 1
372 -4:00 - WART 1991 May 7
373 -3:00 Arg AR%sT 1999 Oct 3
374 -4:00 Arg AR%sT 2000 Mar 3
375 -3:00 - ART 2004 May 31
376 -4:00 - WART 2004 Jul 25
380 Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31
381 -4:16:48 - CMT 1920 May
383 -4:00 Arg AR%sT 1969 Oct 5
384 -3:00 Arg AR%sT 1990 Mar 4
385 -4:00 - WART 1990 Oct 28
386 -4:00 1:00 WARST 1991 Mar 17
387 -4:00 - WART 1991 Oct 6
389 -3:00 Arg AR%sT 1999 Oct 3
390 -4:00 Arg AR%sT 2000 Mar 3
393 # Catamarca (CT), Chubut (CH)
394 Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31
395 -4:16:48 - CMT 1920 May
397 -4:00 Arg AR%sT 1969 Oct 5
398 -3:00 Arg AR%sT 1991 Mar 3
399 -4:00 - WART 1991 Oct 20
400 -3:00 Arg AR%sT 1999 Oct 3
401 -4:00 Arg AR%sT 2000 Mar 3
402 -3:00 - ART 2004 Jun 1
403 -4:00 - WART 2004 Jun 20
407 Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31
408 -4:16:48 - CMT 1920 May
410 -4:00 Arg AR%sT 1969 Oct 5
411 -3:00 Arg AR%sT 1990 Mar 4
412 -4:00 - WART 1990 Oct 15
413 -4:00 1:00 WARST 1991 Mar 1
414 -4:00 - WART 1991 Oct 15
415 -4:00 1:00 WARST 1992 Mar 1
416 -4:00 - WART 1992 Oct 18
417 -3:00 Arg AR%sT 1999 Oct 3
418 -4:00 Arg AR%sT 2000 Mar 3
419 -3:00 - ART 2004 May 23
420 -4:00 - WART 2004 Sep 26
424 Zone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31
425 -4:16:48 - CMT 1920 May
427 -4:00 Arg AR%sT 1969 Oct 5
428 -3:00 Arg AR%sT 1991 Mar 1
429 -4:00 - WART 1991 May 7
430 -3:00 Arg AR%sT 1999 Oct 3
431 -4:00 Arg AR%sT 2000 Mar 3
432 -3:00 - ART 2004 May 31
433 -4:00 - WART 2004 Jul 25
434 -3:00 Arg AR%sT 2008 Jan 21
438 Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31
439 -4:16:48 - CMT 1920 May # Cordoba Mean Time
441 -4:00 Arg AR%sT 1969 Oct 5
442 -3:00 Arg AR%sT 1999 Oct 3
443 -4:00 Arg AR%sT 2000 Mar 3
444 -3:00 - ART 2004 Jun 1
445 -4:00 - WART 2004 Jun 20
448 # Tierra del Fuego, Antartida e Islas del Atlantico Sur (TF)
449 Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31
450 -4:16:48 - CMT 1920 May # Cordoba Mean Time
452 -4:00 Arg AR%sT 1969 Oct 5
453 -3:00 Arg AR%sT 1999 Oct 3
454 -4:00 Arg AR%sT 2000 Mar 3
455 -3:00 - ART 2004 May 30
456 -4:00 - WART 2004 Jun 20
460 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
461 Zone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad
462 -4:30 - ANT 1965 # Netherlands Antilles Time
466 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
467 Zone America/La_Paz -4:32:36 - LMT 1890
468 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT
469 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST
470 -4:00 - BOT # Bolivia Time
474 # From Paul Eggert (1993-11-18):
475 # The mayor of Rio recently attempted to change the time zone rules
476 # just in his city, in order to leave more summer time for the tourist trade.
477 # The rule change lasted only part of the day;
478 # the federal government refused to follow the city's rules, and business
479 # was in a chaos, so the mayor backed down that afternoon.
481 # From IATA SSIM (1996-02):
482 # _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS),
483 # Santa Catarina (SC), Parana (PR), Sao Paulo (SP), Rio de Janeiro (RJ),
484 # Espirito Santo (ES), Minas Gerais (MG), Bahia (BA), Goias (GO),
485 # Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL].
486 # [The last three states are new to this issue of the IATA SSIM.]
488 # From Gwillim Law (1996-10-07):
489 # Geography, history (Tocantins was part of Goias until 1989), and other
490 # sources of time zone information lead me to believe that AL, SE, and TO were
491 # always in BR1, and so the only change was whether or not they observed DST....
492 # The earliest issue of the SSIM I have is 2/91. Each issue from then until
493 # 9/95 says that DST is observed only in the ten states I quoted from 9/95,
494 # along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2
495 # (UTC-4).... The other two time zones given for Brazil are BR3, which is
496 # UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is
497 # UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's
498 # become part of the state of Pernambuco). The boundary between BR1 and BR2
499 # has never been clearly stated. They've simply been called East and West.
500 # However, some conclusions can be drawn from another IATA manual: the Airline
501 # Coding Directory, which lists close to 400 airports in Brazil. For each
502 # airport it gives a time zone which is coded to the SSIM. From that
503 # information, I'm led to conclude that the states of Amapa (AP), Ceara (CE),
504 # Maranhao (MA), Paraiba (PR), Pernambuco (PE), Piaui (PI), and Rio Grande do
505 # Norte (RN), and the eastern part of Para (PA) are all in BR1 without DST.
507 # From Marcos Tadeu (1998-09-27):
508 # <a href="http://pcdsh01.on.br/verao1.html">
509 # Brazilian official page
512 # From Jesper Norgaard (2000-11-03):
513 # [For an official list of which regions in Brazil use which time zones, see:]
514 # http://pcdsh01.on.br/Fusbr.htm
515 # http://pcdsh01.on.br/Fusbrhv.htm
517 # From Celso Doria via David Madeo (2002-10-09):
518 # The reason for the delay this year has to do with elections in Brazil.
520 # Unlike in the United States, elections in Brazil are 100% computerized and
521 # the results are known almost immediately. Yesterday, it was the first
522 # round of the elections when 115 million Brazilians voted for President,
523 # Governor, Senators, Federal Deputies, and State Deputies. Nobody is
524 # counting (or re-counting) votes anymore and we know there will be a second
525 # round for the Presidency and also for some Governors. The 2nd round will
526 # take place on October 27th.
528 # The reason why the DST will only begin November 3rd is that the thousands
529 # of electoral machines used cannot have their time changed, and since the
530 # Constitution says the elections must begin at 8:00 AM and end at 5:00 PM,
531 # the Government decided to postpone DST, instead of changing the Constitution
532 # (maybe, for the next elections, it will be possible to change the clock)...
534 # From Rodrigo Severo (2004-10-04):
535 # It's just the biannual change made necessary by the much hyped, supposedly
536 # modern Brazilian eletronic voting machines which, apparently, can't deal
537 # with a time change between the first and the second rounds of the elections.
539 # From Steffen Thorsen (2007-09-20):
540 # Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00:
541 # http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975
543 # From Paul Eggert (2002-10-10):
544 # The official decrees referenced below are mostly taken from
545 # <a href="http://pcdsh01.on.br/DecHV.html">
546 # Decretos sobre o Horario de Verao no Brasil
549 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
550 # Decree <a href="http://pcdsh01.on.br/HV20466.htm">20,466</a> (1931-10-01)
551 # Decree <a href="http://pcdsh01.on.br/HV21896.htm">21,896</a> (1932-01-10)
552 Rule Brazil 1931 only - Oct 3 11:00 1:00 S
553 Rule Brazil 1932 1933 - Apr 1 0:00 0 -
554 Rule Brazil 1932 only - Oct 3 0:00 1:00 S
555 # Decree <a href="http://pcdsh01.on.br/HV23195.htm">23,195</a> (1933-10-10)
557 # Decree <a href="http://pcdsh01.on.br/HV27496.htm">27,496</a> (1949-11-24)
558 # Decree <a href="http://pcdsh01.on.br/HV27998.htm">27,998</a> (1950-04-13)
559 Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S
560 Rule Brazil 1950 only - Apr 16 1:00 0 -
561 Rule Brazil 1951 1952 - Apr 1 0:00 0 -
562 # Decree <a href="http://pcdsh01.on.br/HV32308.htm">32,308</a> (1953-02-24)
563 Rule Brazil 1953 only - Mar 1 0:00 0 -
564 # Decree <a href="http://pcdsh01.on.br/HV34724.htm">34,724</a> (1953-11-30)
566 # Decree <a href="http://pcdsh01.on.br/HV52700.htm">52,700</a> (1963-10-18)
567 # established DST from 1963-10-23 00:00 to 1964-02-29 00:00
568 # in SP, RJ, GB, MG, ES, due to the prolongation of the drought.
569 # Decree <a href="http://pcdsh01.on.br/HV53071.htm">53,071</a> (1963-12-03)
570 # extended the above decree to all of the national territory on 12-09.
571 Rule Brazil 1963 only - Dec 9 0:00 1:00 S
572 # Decree <a href="http://pcdsh01.on.br/HV53604.htm">53,604</a> (1964-02-25)
573 # extended summer time by one day to 1964-03-01 00:00 (start of school).
574 Rule Brazil 1964 only - Mar 1 0:00 0 -
575 # Decree <a href="http://pcdsh01.on.br/HV55639.htm">55,639</a> (1965-01-27)
576 Rule Brazil 1965 only - Jan 31 0:00 1:00 S
577 Rule Brazil 1965 only - Mar 31 0:00 0 -
578 # Decree <a href="http://pcdsh01.on.br/HV57303.htm">57,303</a> (1965-11-22)
579 Rule Brazil 1965 only - Dec 1 0:00 1:00 S
580 # Decree <a href="http://pcdsh01.on.br/HV57843.htm">57,843</a> (1966-02-18)
581 Rule Brazil 1966 1968 - Mar 1 0:00 0 -
582 Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S
583 # Decree <a href="http://pcdsh01.on.br/HV63429.htm">63,429</a> (1968-10-15)
585 # Decree <a href="http://pcdsh01.on.br/HV91698.htm">91,698</a> (1985-09-27)
586 Rule Brazil 1985 only - Nov 2 0:00 1:00 S
587 # Decree 92,310 (1986-01-21)
588 # Decree 92,463 (1986-03-13)
589 Rule Brazil 1986 only - Mar 15 0:00 0 -
590 # Decree 93,316 (1986-10-01)
591 Rule Brazil 1986 only - Oct 25 0:00 1:00 S
592 Rule Brazil 1987 only - Feb 14 0:00 0 -
593 # Decree <a href="http://pcdsh01.on.br/HV94922.htm">94,922</a> (1987-09-22)
594 Rule Brazil 1987 only - Oct 25 0:00 1:00 S
595 Rule Brazil 1988 only - Feb 7 0:00 0 -
596 # Decree <a href="http://pcdsh01.on.br/HV96676.htm">96,676</a> (1988-09-12)
597 # except for the states of AC, AM, PA, RR, RO, and AP (then a territory)
598 Rule Brazil 1988 only - Oct 16 0:00 1:00 S
599 Rule Brazil 1989 only - Jan 29 0:00 0 -
600 # Decree <a href="http://pcdsh01.on.br/HV98077.htm">98,077</a> (1989-08-21)
601 # with the same exceptions
602 Rule Brazil 1989 only - Oct 15 0:00 1:00 S
603 Rule Brazil 1990 only - Feb 11 0:00 0 -
604 # Decree <a href="http://pcdsh01.on.br/HV99530.htm">99,530</a> (1990-09-17)
605 # adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF.
606 # Decree 99,629 (1990-10-19) adds BA, MT.
607 Rule Brazil 1990 only - Oct 21 0:00 1:00 S
608 Rule Brazil 1991 only - Feb 17 0:00 0 -
609 # <a href="http://pcdsh01.on.br/HV1991.htm">Unnumbered decree</a> (1991-09-25)
610 # adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF.
611 Rule Brazil 1991 only - Oct 20 0:00 1:00 S
612 Rule Brazil 1992 only - Feb 9 0:00 0 -
613 # <a href="http://pcdsh01.on.br/HV1992.htm">Unnumbered decree</a> (1992-10-16)
614 # adopted by same states.
615 Rule Brazil 1992 only - Oct 25 0:00 1:00 S
616 Rule Brazil 1993 only - Jan 31 0:00 0 -
617 # Decree <a href="http://pcdsh01.on.br/HV942.htm">942</a> (1993-09-28)
618 # adopted by same states, plus AM.
619 # Decree <a href="http://pcdsh01.on.br/HV1252.htm">1,252</a> (1994-09-22;
620 # web page corrected 2004-01-07) adopted by same states, minus AM.
621 # Decree <a href="http://pcdsh01.on.br/HV1636.htm">1,636</a> (1995-09-14)
622 # adopted by same states, plus MT and TO.
623 # Decree <a href="http://pcdsh01.on.br/HV1674.htm">1,674</a> (1995-10-13)
625 Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S
626 Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 -
627 Rule Brazil 1996 only - Feb 11 0:00 0 -
628 # Decree <a href="http://pcdsh01.on.br/HV2000.htm">2,000</a> (1996-09-04)
629 # adopted by same states, minus AL, SE.
630 Rule Brazil 1996 only - Oct 6 0:00 1:00 S
631 Rule Brazil 1997 only - Feb 16 0:00 0 -
632 # From Daniel C. Sobral (1998-02-12):
633 # In 1997, the DS began on October 6. The stated reason was that
634 # because international television networks ignored Brazil's policy on DS,
635 # they bought the wrong times on satellite for coverage of Pope's visit.
636 # This year, the ending date of DS was postponed to March 1
637 # to help dealing with the shortages of electric power.
639 # Decree 2,317 (1997-09-04), adopted by same states.
640 Rule Brazil 1997 only - Oct 6 0:00 1:00 S
641 # Decree <a href="http://pcdsh01.on.br/figuras/HV2495.JPG">2,495</a>
643 Rule Brazil 1998 only - Mar 1 0:00 0 -
644 # Decree <a href="http://pcdsh01.on.br/figuras/Hv98.jpg">2,780</a> (1998-09-11)
645 # adopted by the same states as before.
646 Rule Brazil 1998 only - Oct 11 0:00 1:00 S
647 Rule Brazil 1999 only - Feb 21 0:00 0 -
648 # Decree <a href="http://pcdsh01.on.br/figuras/HV3150.gif">3,150</a>
649 # (1999-08-23) adopted by same states.
650 # Decree <a href="http://pcdsh01.on.br/DecHV99.gif">3,188</a> (1999-09-30)
651 # adds SE, AL, PB, PE, RN, CE, PI, MA and RR.
652 Rule Brazil 1999 only - Oct 3 0:00 1:00 S
653 Rule Brazil 2000 only - Feb 27 0:00 0 -
654 # Decree <a href="http://pcdsh01.on.br/DEC3592.htm">3,592</a> (2000-09-06)
655 # adopted by the same states as before.
656 # Decree <a href="http://pcdsh01.on.br/Dec3630.jpg">3,630</a> (2000-10-13)
657 # repeals DST in PE and RR, effective 2000-10-15 00:00.
658 # Decree <a href="http://pcdsh01.on.br/Dec3632.jpg">3,632</a> (2000-10-17)
659 # repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00.
660 # Decree <a href="http://pcdsh01.on.br/figuras/HV3916.gif">3,916</a>
661 # (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE.
662 Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S
663 Rule Brazil 2001 2006 - Feb Sun>=15 0:00 0 -
664 # Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE.
665 # <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm"></a>
666 Rule Brazil 2002 only - Nov 3 0:00 1:00 S
667 # Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO.
668 # <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm"></a>
669 Rule Brazil 2003 only - Oct 19 0:00 1:00 S
670 # Decree 5,223 (2004-10-01) reestablishes DST in MT.
671 # <a href="http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm"></a>
672 Rule Brazil 2004 only - Nov 2 0:00 1:00 S
673 # Decree <a href="http://pcdsh01.on.br/DecHV5539.gif">5,539</a> (2005-09-19),
674 # adopted by the same states as before.
675 Rule Brazil 2005 only - Oct 16 0:00 1:00 S
676 # Decree <a href="http://pcdsh01.on.br/DecHV5920.gif">5,920</a> (2006-10-03),
677 # adopted by the same states as before.
678 Rule Brazil 2006 only - Nov 5 0:00 1:00 S
679 Rule Brazil 2007 only - Feb 25 0:00 0 -
680 # (Decree number not yet known)
681 # http://www.brasil.gov.br/noticias/ultimas_noticias/horario_verao070920/
682 # (2007-09-20) after a heads-up from Steffen Thorsen:
683 Rule Brazil 2007 max - Oct Sun>=8 0:00 1:00 S
684 Rule Brazil 2008 max - Feb Sun>=15 0:00 0 -
685 # The latest ruleset listed above says that the following states observe DST:
686 # DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP.
687 # For dates after mid-2008, the above rules with TO="max" are guesses
688 # and are quite possibly wrong, but are more likely than no DST at all.
691 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
693 # Fernando de Noronha (administratively part of PE)
694 Zone America/Noronha -2:09:40 - LMT 1914
695 -2:00 Brazil FN%sT 1990 Sep 17
696 -2:00 - FNT 1999 Sep 30
697 -2:00 Brazil FN%sT 2000 Oct 15
698 -2:00 - FNT 2001 Sep 13
699 -2:00 Brazil FN%sT 2002 Oct 1
701 # Other Atlantic islands have no permanent settlement.
702 # These include Trindade and Martin Vaz (administratively part of ES),
703 # Atol das Rocas (RN), and Penedos de Sao Pedro e Sao Paulo (PE).
704 # Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01;
705 # it also included the Penedos.
707 # Amapa (AP), east Para (PA)
708 # East Para includes Belem, Maraba, Serra Norte, and Sao Felix do Xingu.
709 # The division between east and west Para is the river Xingu.
710 # In the north a very small part from the river Javary (now Jari I guess,
711 # the border with Amapa) to the Amazon, then to the Xingu.
712 Zone America/Belem -3:13:56 - LMT 1914
713 -3:00 Brazil BR%sT 1988 Sep 12
716 # Maranhao (MA), Piaui (PI), Ceara (CE), Rio Grande do Norte (RN),
718 Zone America/Fortaleza -2:34:00 - LMT 1914
719 -3:00 Brazil BR%sT 1990 Sep 17
720 -3:00 - BRT 1999 Sep 30
721 -3:00 Brazil BR%sT 2000 Oct 22
722 -3:00 - BRT 2001 Sep 13
723 -3:00 Brazil BR%sT 2002 Oct 1
726 # Pernambuco (PE) (except Atlantic islands)
727 Zone America/Recife -2:19:36 - LMT 1914
728 -3:00 Brazil BR%sT 1990 Sep 17
729 -3:00 - BRT 1999 Sep 30
730 -3:00 Brazil BR%sT 2000 Oct 15
731 -3:00 - BRT 2001 Sep 13
732 -3:00 Brazil BR%sT 2002 Oct 1
736 Zone America/Araguaina -3:12:48 - LMT 1914
737 -3:00 Brazil BR%sT 1990 Sep 17
738 -3:00 - BRT 1995 Sep 14
739 -3:00 Brazil BR%sT 2003 Sep 24
742 # Alagoas (AL), Sergipe (SE)
743 Zone America/Maceio -2:22:52 - LMT 1914
744 -3:00 Brazil BR%sT 1990 Sep 17
745 -3:00 - BRT 1995 Oct 13
746 -3:00 Brazil BR%sT 1996 Sep 4
747 -3:00 - BRT 1999 Sep 30
748 -3:00 Brazil BR%sT 2000 Oct 22
749 -3:00 - BRT 2001 Sep 13
750 -3:00 Brazil BR%sT 2002 Oct 1
754 # There are too many Salvadors elsewhere, so use America/Bahia instead
755 # of America/Salvador.
756 Zone America/Bahia -2:34:04 - LMT 1914
757 -3:00 Brazil BR%sT 2003 Sep 24
760 # Goias (GO), Distrito Federal (DF), Minas Gerais (MG),
761 # Espirito Santo (ES), Rio de Janeiro (RJ), Sao Paulo (SP), Parana (PR),
762 # Santa Catarina (SC), Rio Grande do Sul (RS)
763 Zone America/Sao_Paulo -3:06:28 - LMT 1914
764 -3:00 Brazil BR%sT 1963 Oct 23 00:00
768 # Mato Grosso do Sul (MS)
769 Zone America/Campo_Grande -3:38:28 - LMT 1914
773 Zone America/Cuiaba -3:44:20 - LMT 1914
774 -4:00 Brazil AM%sT 2003 Sep 24
775 -4:00 - AMT 2004 Oct 1
778 # west Para (PA), Rondonia (RO)
779 # West Para includes Altamira, Oribidos, Prainha, Oriximina, and Santarem.
780 Zone America/Porto_Velho -4:15:36 - LMT 1914
781 -4:00 Brazil AM%sT 1988 Sep 12
785 Zone America/Boa_Vista -4:02:40 - LMT 1914
786 -4:00 Brazil AM%sT 1988 Sep 12
787 -4:00 - AMT 1999 Sep 30
788 -4:00 Brazil AM%sT 2000 Oct 15
791 # east Amazonas (AM): Boca do Acre, Jutai, Manaus, Floriano Peixoto
792 # The great circle line from Tabatinga to Porto Acre divides
793 # east from west Amazonas.
794 Zone America/Manaus -4:00:04 - LMT 1914
795 -4:00 Brazil AM%sT 1988 Sep 12
796 -4:00 - AMT 1993 Sep 28
797 -4:00 Brazil AM%sT 1994 Sep 22
800 # west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant,
801 # Eirunepe, Envira, Ipixuna
802 Zone America/Eirunepe -4:39:28 - LMT 1914
803 -5:00 Brazil AC%sT 1988 Sep 12
804 -5:00 - ACT 1993 Sep 28
805 -5:00 Brazil AC%sT 1994 Sep 22
809 Zone America/Rio_Branco -4:31:12 - LMT 1914
810 -5:00 Brazil AC%sT 1988 Sep 12
816 # From Eduardo Krell (1995-10-19):
817 # The law says to switch to DST at midnight [24:00] on the second SATURDAY
818 # of October.... The law is the same for March and October.
820 # Because of the drought this year, the government decided to go into
821 # DST earlier (saturday 9/26 at 24:00). This is a one-time change only ...
822 # (unless there's another dry season next year, I guess).
824 # From Julio I. Pacheco Troncoso (1999-03-18):
825 # Because of the same drought, the government decided to end DST later,
826 # on April 3, (one-time change).
828 # From Oscar van Vlijmen (2006-10-08):
829 # http://www.horaoficial.cl/cambio.htm
831 # From Jesper Norgaard Welen (2006-10-08):
832 # I think that there are some obvious mistakes in the suggested link
833 # from Oscar van Vlijmen,... for instance entry 66 says that GMT-4
834 # ended 1990-09-12 while entry 67 only begins GMT-3 at 1990-09-15
835 # (they should have been 1990-09-15 and 1990-09-16 respectively), but
836 # anyhow it clears up some doubts too.
838 # From Paul Eggert (2006-12-27):
839 # The following data for Chile and America/Santiago are from
840 # <http://www.horaoficial.cl/horaof.htm> (2006-09-20), transcribed by
841 # Jesper Norgaard Welen. The data for Pacific/Easter are from Shanks
842 # & Pottenger, except with DST transitions after 1932 cloned from
843 # America/Santiago. The pre-1980 Pacific/Easter data are dubious,
844 # but we have no other source.
846 # From German Poo-Caaman~o (2008-03-03):
847 # Due to drought, Chile extends Daylight Time in three weeks. This
848 # is one-time change (Saturday 3/29 at 24:00 for America/Santiago
849 # and Saturday 3/29 at 22:00 for Pacific/Easter)
850 # The Supreme Decree is located at
851 # <a href="http://www.shoa.cl/servicios/supremo316.pdf">
852 # http://www.shoa.cl/servicios/supremo316.pdf
854 # and the instructions for 2008 are located in:
855 # <a href="http://www.horaoficial.cl/cambio.htm">
856 # http://www.horaoficial.cl/cambio.htm
859 # From José Miguel Garrido (2008-03-05):
861 # You could see the announces of the change on
862 # <a href="http://www.shoa.cl/noticias/2008/04hora/hora.htm">
863 # http://www.shoa.cl/noticias/2008/04hora/hora.htm
866 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
867 Rule Chile 1927 1932 - Sep 1 0:00 1:00 S
868 Rule Chile 1928 1932 - Apr 1 0:00 0 -
869 Rule Chile 1942 only - Jun 1 4:00u 0 -
870 Rule Chile 1942 only - Aug 1 5:00u 1:00 S
871 Rule Chile 1946 only - Jul 15 4:00u 1:00 S
872 Rule Chile 1946 only - Sep 1 3:00u 0:00 -
873 Rule Chile 1947 only - Apr 1 4:00u 0 -
874 Rule Chile 1968 only - Nov 3 4:00u 1:00 S
875 Rule Chile 1969 only - Mar 30 3:00u 0 -
876 Rule Chile 1969 only - Nov 23 4:00u 1:00 S
877 Rule Chile 1970 only - Mar 29 3:00u 0 -
878 Rule Chile 1971 only - Mar 14 3:00u 0 -
879 Rule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 S
880 Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 -
881 Rule Chile 1973 only - Sep 30 4:00u 1:00 S
882 Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 S
883 Rule Chile 1987 only - Apr 12 3:00u 0 -
884 Rule Chile 1988 1989 - Mar Sun>=9 3:00u 0 -
885 Rule Chile 1988 only - Oct Sun>=1 4:00u 1:00 S
886 Rule Chile 1989 only - Oct Sun>=9 4:00u 1:00 S
887 Rule Chile 1990 only - Mar 18 3:00u 0 -
888 Rule Chile 1990 only - Sep 16 4:00u 1:00 S
889 Rule Chile 1991 1996 - Mar Sun>=9 3:00u 0 -
890 Rule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 S
891 Rule Chile 1997 only - Mar 30 3:00u 0 -
892 Rule Chile 1998 only - Mar Sun>=9 3:00u 0 -
893 Rule Chile 1998 only - Sep 27 4:00u 1:00 S
894 Rule Chile 1999 only - Apr 4 3:00u 0 -
895 Rule Chile 1999 max - Oct Sun>=9 4:00u 1:00 S
896 Rule Chile 2000 2007 - Mar Sun>=9 3:00u 0 -
897 # N.B.: the end of March 29 in Chile is March 30 in Universal time,
898 # which is used below in specifying the transition.
899 Rule Chile 2008 only - Mar 30 3:00u 0 -
900 Rule Chile 2009 max - Mar Sun>=9 3:00u 0 -
901 # IATA SSIM anomalies: (1992-02) says 1992-03-14;
902 # (1996-09) says 1998-03-08. Ignore these.
903 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
904 Zone America/Santiago -4:42:46 - LMT 1890
905 -4:42:46 - SMT 1910 # Santiago Mean Time
906 -5:00 - CLT 1916 Jul 1 # Chile Time
907 -4:42:46 - SMT 1918 Sep 1 # Santiago Mean Time
908 -4:00 - CLT 1919 Jul 1 # Chile Time
909 -4:42:46 - SMT 1927 Sep 1 # Santiago Mean Time
910 -5:00 Chile CL%sT 1947 May 22 # Chile Time
912 Zone Pacific/Easter -7:17:44 - LMT 1890
913 -7:17:28 - EMT 1932 Sep # Easter Mean Time
914 -7:00 Chile EAS%sT 1982 Mar 13 21:00 # Easter I Time
917 # Sala y Gomez Island is like Pacific/Easter.
918 # Other Chilean locations, including Juan Fernandez Is, San Ambrosio,
919 # San Felix, and Antarctic bases, are like America/Santiago.
922 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
923 Rule CO 1992 only - May 3 0:00 1:00 S
924 Rule CO 1993 only - Apr 4 0:00 0 -
925 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
926 Zone America/Bogota -4:56:20 - LMT 1884 Mar 13
927 -4:56:20 - BMT 1914 Nov 23 # Bogota Mean Time
928 -5:00 CO CO%sT # Colombia Time
929 # Malpelo, Providencia, San Andres
930 # no information; probably like America/Bogota
934 # From Paul Eggert (2006-03-22):
935 # Shanks & Pottenger say that The Bottom and Philipsburg have been at
936 # -4:00 since standard time was introduced on 1912-03-02; and that
937 # Kralendijk and Rincon used Kralendijk Mean Time (-4:33:08) from
938 # 1912-02-02 to 1965-01-01. The former is dubious, since S&P also say
939 # Saba Island has been like Curacao.
940 # This all predates our 1970 cutoff, though.
942 # By July 2007 Curacao and St Maarten are planned to become
943 # associated states within the Netherlands, much like Aruba;
944 # Bonaire, Saba and St Eustatius would become directly part of the
945 # Netherlands as Kingdom Islands. This won't affect their time zones
946 # though, as far as we know.
948 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
949 Zone America/Curacao -4:35:44 - LMT 1912 Feb 12 # Willemstad
950 -4:30 - ANT 1965 # Netherlands Antilles Time
955 # From Paul Eggert (2007-03-04):
956 # Apparently Ecuador had a failed experiment with DST in 1992.
957 # <http://midena.gov.ec/content/view/1261/208/> (2007-02-27) and
958 # <http://www.hoy.com.ec/NoticiaNue.asp?row_id=249856> (2006-11-06) both
959 # talk about "hora Sixto". Leave this alone for now, as we have no data.
961 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
962 Zone America/Guayaquil -5:19:20 - LMT 1890
963 -5:14:00 - QMT 1931 # Quito Mean Time
964 -5:00 - ECT # Ecuador Time
965 Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno
967 -6:00 - GALT # Galapagos Time
971 # From Paul Eggert (2006-03-22):
972 # Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except
973 # the IATA gives 1996-09-08. Go with Shanks & Pottenger.
975 # From Falkland Islands Government Office, London (2001-01-22)
976 # via Jesper Norgaard:
977 # ... the clocks revert back to Local Mean Time at 2 am on Sunday 15
978 # April 2001 and advance one hour to summer time at 2 am on Sunday 2
979 # September. It is anticipated that the clocks will revert back at 2
980 # am on Sunday 21 April 2002 and advance to summer time at 2 am on
981 # Sunday 1 September.
983 # From Rives McDow (2001-02-13):
985 # I have communicated several times with people there, and the last
986 # time I had communications that was helpful was in 1998. Here is
987 # what was said then:
989 # "The general rule was that Stanley used daylight saving and the Camp
990 # did not. However for various reasons many people in the Camp have
991 # started to use daylight saving (known locally as 'Stanley Time')
992 # There is no rule as to who uses daylight saving - it is a matter of
993 # personal choice and so it is impossible to draw a map showing who
994 # uses it and who does not. Any list would be out of date as soon as
995 # it was produced. This year daylight saving ended on April 18/19th
996 # and started again on September 12/13th. I do not know what the rule
997 # is, but can find out if you like. We do not change at the same time
1000 # I did have in my notes that the rule was "Second Saturday in Sep at
1001 # 0:00 until third Saturday in Apr at 0:00". I think that this does
1002 # not agree in some cases with Shanks; is this true?
1004 # Also, there is no mention in the list that some areas in the
1005 # Falklands do not use DST. I have found in my communications there
1006 # that these areas are on the western half of East Falkland and all of
1007 # West Falkland. Stanley is the only place that consistently observes
1008 # DST. Again, as in other places in the world, the farmers don't like
1009 # it. West Falkland is almost entirely sheep farmers.
1011 # I know one lady there that keeps a list of which farm keeps DST and
1012 # which doesn't each year. She runs a shop in Stanley, and says that
1013 # the list changes each year. She uses it to communicate to her
1014 # customers, catching them when they are home for lunch or dinner.
1016 # From Paul Eggert (2001-03-05):
1017 # For now, we'll just record the time in Stanley, since we have no
1020 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1021 Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S
1022 Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 -
1023 Rule Falk 1939 only - Oct 1 0:00 1:00 S
1024 Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S
1025 Rule Falk 1943 only - Jan 1 0:00 0 -
1026 Rule Falk 1983 only - Sep lastSun 0:00 1:00 S
1027 Rule Falk 1984 1985 - Apr lastSun 0:00 0 -
1028 Rule Falk 1984 only - Sep 16 0:00 1:00 S
1029 Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S
1030 Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 -
1031 Rule Falk 2001 max - Apr Sun>=15 2:00 0 -
1032 Rule Falk 2001 max - Sep Sun>=1 2:00 1:00 S
1033 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1034 Zone Atlantic/Stanley -3:51:24 - LMT 1890
1035 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time
1036 -4:00 Falk FK%sT 1983 May # Falkland Is Time
1037 -3:00 Falk FK%sT 1985 Sep 15
1041 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1042 Zone America/Cayenne -3:29:20 - LMT 1911 Jul
1043 -4:00 - GFT 1967 Oct # French Guiana Time
1047 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1048 Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown
1049 -3:45 - GBGT 1966 May 26 # Br Guiana Time
1050 -3:45 - GYT 1975 Jul 31 # Guyana Time
1052 # IATA SSIM (1996-06) says -4:00. Assume a 1991 switch.
1056 # From Paul Eggert (2006-03-22):
1057 # Shanks & Pottenger say that spring transitions are from 01:00 -> 02:00,
1058 # and autumn transitions are from 00:00 -> 23:00. Go with pre-1999
1059 # editions of Shanks, and with the IATA, who say transitions occur at 00:00.
1060 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1061 Rule Para 1975 1988 - Oct 1 0:00 1:00 S
1062 Rule Para 1975 1978 - Mar 1 0:00 0 -
1063 Rule Para 1979 1991 - Apr 1 0:00 0 -
1064 Rule Para 1989 only - Oct 22 0:00 1:00 S
1065 Rule Para 1990 only - Oct 1 0:00 1:00 S
1066 Rule Para 1991 only - Oct 6 0:00 1:00 S
1067 Rule Para 1992 only - Mar 1 0:00 0 -
1068 Rule Para 1992 only - Oct 5 0:00 1:00 S
1069 Rule Para 1993 only - Mar 31 0:00 0 -
1070 Rule Para 1993 1995 - Oct 1 0:00 1:00 S
1071 Rule Para 1994 1995 - Feb lastSun 0:00 0 -
1072 Rule Para 1996 only - Mar 1 0:00 0 -
1073 # IATA SSIM (2000-02) says 1999-10-10; ignore this for now.
1074 # From Steffen Thorsen (2000-10-02):
1075 # I have three independent reports that Paraguay changed to DST this Sunday
1078 # Translated by Gwillim Law (2001-02-27) from
1079 # <a href="http://www.diarionoticias.com.py/011000/nacional/naciona1.htm">
1080 # Noticias, a daily paper in Asuncion, Paraguay (2000-10-01)
1082 # Starting at 0:00 today, the clock will be set forward 60 minutes, in
1083 # fulfillment of Decree No. 7,273 of the Executive Power.... The time change
1084 # system has been operating for several years. Formerly there was a separate
1085 # decree each year; the new law has the same effect, but permanently. Every
1086 # year, the time will change on the first Sunday of October; likewise, the
1087 # clock will be set back on the first Sunday of March.
1089 Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S
1090 # IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger.
1091 Rule Para 1997 only - Feb lastSun 0:00 0 -
1092 # Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but
1093 # (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27).
1094 Rule Para 1998 2001 - Mar Sun>=1 0:00 0 -
1095 # From Rives McDow (2002-02-28):
1096 # A decree was issued in Paraguay (no. 16350) on 2002-02-26 that changed the
1097 # dst method to be from the first Sunday in September to the first Sunday in
1099 Rule Para 2002 2004 - Apr Sun>=1 0:00 0 -
1100 Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 S
1102 # From Jesper Norgaard Welen (2005-01-02):
1103 # There are several sources that claim that Paraguay made
1104 # a timezone rule change in autumn 2004.
1105 # From Steffen Thorsen (2005-01-05):
1106 # Decree 1,867 (2004-03-05)
1107 # From Carlos Raul Perasso via Jesper Norgaard Welen (2006-10-13)
1108 # <http://www.presidencia.gov.py/decretos/D1867.pdf>
1109 Rule Para 2004 max - Oct Sun>=15 0:00 1:00 S
1110 Rule Para 2005 max - Mar Sun>=8 0:00 0 -
1112 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1113 Zone America/Asuncion -3:50:40 - LMT 1890
1114 -3:50:40 - AMT 1931 Oct 10 # Asuncion Mean Time
1115 -4:00 - PYT 1972 Oct # Paraguay Time
1116 -3:00 - PYT 1974 Apr
1121 # <a href="news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net">
1122 # From Evelyn C. Leeper via Mark Brader (2003-10-26):</a>
1123 # When we were in Peru in 1985-1986, they apparently switched over
1124 # sometime between December 29 and January 3 while we were on the Amazon.
1126 # From Paul Eggert (2006-03-22):
1127 # Shanks & Pottenger don't have this transition. Assume 1986 was like 1987.
1129 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1130 Rule Peru 1938 only - Jan 1 0:00 1:00 S
1131 Rule Peru 1938 only - Apr 1 0:00 0 -
1132 Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S
1133 Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 -
1134 Rule Peru 1986 1987 - Jan 1 0:00 1:00 S
1135 Rule Peru 1986 1987 - Apr 1 0:00 0 -
1136 Rule Peru 1990 only - Jan 1 0:00 1:00 S
1137 Rule Peru 1990 only - Apr 1 0:00 0 -
1138 # IATA is ambiguous for 1993/1995; go with Shanks & Pottenger.
1139 Rule Peru 1994 only - Jan 1 0:00 1:00 S
1140 Rule Peru 1994 only - Apr 1 0:00 0 -
1141 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1142 Zone America/Lima -5:08:12 - LMT 1890
1143 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time?
1144 -5:00 Peru PE%sT # Peru Time
1147 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1148 Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken
1149 -2:00 - GST # South Georgia Time
1152 # uninhabited; scientific personnel have wintered
1155 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1156 Zone America/Paramaribo -3:40:40 - LMT 1911
1157 -3:40:52 - PMT 1935 # Paramaribo Mean Time
1158 -3:40:36 - PMT 1945 Oct # The capital moved?
1159 -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time
1160 -3:30 - SRT 1984 Oct # Suriname Time
1163 # Trinidad and Tobago
1164 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1165 Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2
1169 # From Paul Eggert (1993-11-18):
1170 # Uruguay wins the prize for the strangest peacetime manipulation of the rules.
1171 # From Shanks & Pottenger:
1172 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1173 # Whitman gives 1923 Oct 1; go with Shanks & Pottenger.
1174 Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS
1175 Rule Uruguay 1924 1926 - Apr 1 0:00 0 -
1176 Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS
1177 Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS
1178 # Shanks & Pottenger give 1935 Apr 1 0:00 & 1936 Mar 30 0:00; go with Whitman.
1179 Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 -
1180 Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS
1181 Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 -
1182 # Whitman gives 1937 Oct 3; go with Shanks & Pottenger.
1183 Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS
1184 # Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13,
1185 # and 1943 Apr 13 ``to present time''; go with Shanks & Pottenger.
1186 Rule Uruguay 1941 only - Aug 1 0:00 0:30 HS
1187 Rule Uruguay 1942 only - Jan 1 0:00 0 -
1188 Rule Uruguay 1942 only - Dec 14 0:00 1:00 S
1189 Rule Uruguay 1943 only - Mar 14 0:00 0 -
1190 Rule Uruguay 1959 only - May 24 0:00 1:00 S
1191 Rule Uruguay 1959 only - Nov 15 0:00 0 -
1192 Rule Uruguay 1960 only - Jan 17 0:00 1:00 S
1193 Rule Uruguay 1960 only - Mar 6 0:00 0 -
1194 Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S
1195 Rule Uruguay 1965 only - Sep 26 0:00 0 -
1196 Rule Uruguay 1966 1967 - Oct 31 0:00 0 -
1197 Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS
1198 Rule Uruguay 1968 1970 - Dec 2 0:00 0 -
1199 Rule Uruguay 1972 only - Apr 24 0:00 1:00 S
1200 Rule Uruguay 1972 only - Aug 15 0:00 0 -
1201 Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS
1202 Rule Uruguay 1974 only - Dec 22 0:00 1:00 S
1203 Rule Uruguay 1976 only - Oct 1 0:00 0 -
1204 Rule Uruguay 1977 only - Dec 4 0:00 1:00 S
1205 Rule Uruguay 1978 only - Apr 1 0:00 0 -
1206 Rule Uruguay 1979 only - Oct 1 0:00 1:00 S
1207 Rule Uruguay 1980 only - May 1 0:00 0 -
1208 Rule Uruguay 1987 only - Dec 14 0:00 1:00 S
1209 Rule Uruguay 1988 only - Mar 14 0:00 0 -
1210 Rule Uruguay 1988 only - Dec 11 0:00 1:00 S
1211 Rule Uruguay 1989 only - Mar 12 0:00 0 -
1212 Rule Uruguay 1989 only - Oct 29 0:00 1:00 S
1213 # Shanks & Pottenger say no DST was observed in 1990/1 and 1991/2,
1214 # and that 1992/3's DST was from 10-25 to 03-01. Go with IATA.
1215 Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 -
1216 Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S
1217 Rule Uruguay 1992 only - Oct 18 0:00 1:00 S
1218 Rule Uruguay 1993 only - Feb 28 0:00 0 -
1219 # From Eduardo Cota (2004-09-20):
1220 # The uruguayan government has decreed a change in the local time....
1221 # http://www.presidencia.gub.uy/decretos/2004091502.htm
1222 Rule Uruguay 2004 only - Sep 19 0:00 1:00 S
1223 # From Steffen Thorsen (2005-03-11):
1224 # Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to
1225 # save energy ... it was postponed two weeks....
1226 # http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm
1227 Rule Uruguay 2005 only - Mar 27 2:00 0 -
1228 # From Eduardo Cota (2005-09-27):
1229 # http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF
1230 # This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at
1231 # 02:00 local time, official time in Uruguay will be at GMT -2.
1232 Rule Uruguay 2005 only - Oct 9 2:00 1:00 S
1233 Rule Uruguay 2006 only - Mar 12 2:00 0 -
1234 # From Jesper Norgaard Welen (2006-09-06):
1235 # http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF
1236 Rule Uruguay 2006 max - Oct Sun>=1 2:00 1:00 S
1237 Rule Uruguay 2007 max - Mar Sun>=8 2:00 0 -
1238 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1239 Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28
1240 -3:44:44 - MMT 1920 May 1 # Montevideo MT
1241 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time
1246 # From John Stainforth (2007-11-28):
1247 # ... the change for Venezuela originally expected for 2007-12-31 has
1248 # been brought forward to 2007-12-09. The official announcement was
1249 # published today in the "Gaceta Oficial de la Republica Bolivariana
1250 # de Venezuela, numero 38.819" (official document for all laws or
1251 # resolution publication)
1252 # http://www.globovision.com/news.php?nid=72208
1254 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1255 Zone America/Caracas -4:27:44 - LMT 1890
1256 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time?
1257 -4:30 - VET 1965 # Venezuela Time
1258 -4:00 - VET 2007 Dec 9 03:00
projects / dragonfly.git / blob