Commit | Line | Data |
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8cb73418 SW |
1 | # tzdb data for South America and environs |
2 | ||
3dbe7164 SW |
3 | # This file is in the public domain, so clarified as of |
4 | # 2009-05-17 by Arthur David Olson. | |
984263bc | 5 | |
48afb8ac | 6 | # This file is by no means authoritative; if you think you know better, |
984263bc | 7 | # go ahead and edit the file (and please send any changes to |
48afb8ac SW |
8 | # tz@iana.org for general use in the future). For more, please see |
9 | # the file CONTRIBUTING in the tz distribution. | |
984263bc | 10 | |
83b0991f | 11 | # From Paul Eggert (2016-12-05): |
03b0b587 SW |
12 | # |
13 | # Unless otherwise specified, the source for data through 1990 is: | |
bd7414aa SW |
14 | # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), |
15 | # San Diego: ACS Publications, Inc. (2003). | |
03b0b587 | 16 | # Unfortunately this book contains many errors and cites no sources. |
80e7e01d | 17 | # |
83b0991f SW |
18 | # Many years ago Gwillim Law wrote that a good source |
19 | # for time zone data was the International Air Transport | |
984263bc MD |
20 | # Association's Standard Schedules Information Manual (IATA SSIM), |
21 | # published semiannually. Law sent in several helpful summaries | |
03b0b587 SW |
22 | # of the IATA's data after 1990. Except where otherwise noted, |
23 | # IATA SSIM is the source for entries after 1990. | |
984263bc | 24 | # |
03b0b587 SW |
25 | # For data circa 1899, a common source is: |
26 | # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94. | |
e4ac9488 | 27 | # https://www.jstor.org/stable/1774359 |
984263bc | 28 | # |
83b0991f | 29 | # These tables use numeric abbreviations like -03 and -0330 for |
a3b9d54d | 30 | # integer hour and minute UT offsets. Although earlier editions used |
83b0991f SW |
31 | # alphabetic time zone abbreviations, these abbreviations were |
32 | # invented and did not reflect common practice. | |
984263bc MD |
33 | |
34 | ############################################################################### | |
35 | ||
36 | ############################################################################### | |
37 | ||
38 | # Argentina | |
39 | ||
40 | # From Bob Devine (1988-01-28): | |
41 | # Argentina: first Sunday in October to first Sunday in April since 1976. | |
42 | # Double Summer time from 1969 to 1974. Switches at midnight. | |
43 | ||
48afb8ac | 44 | # From U. S. Naval Observatory (1988-01-19): |
984263bc MD |
45 | # ARGENTINA 3 H BEHIND UTC |
46 | ||
9ffe4b14 | 47 | # From Hernan G. Otero (1995-06-26): |
984263bc MD |
48 | # I am sending modifications to the Argentine time zone table... |
49 | # AR was chosen because they are the ISO letters that represent Argentina. | |
50 | ||
b858e488 | 51 | # Rule NAME FROM TO - IN ON AT SAVE LETTER/S |
574756e4 | 52 | Rule Arg 1930 only - Dec 1 0:00 1:00 - |
984263bc | 53 | Rule Arg 1931 only - Apr 1 0:00 0 - |
574756e4 | 54 | Rule Arg 1931 only - Oct 15 0:00 1:00 - |
984263bc | 55 | Rule Arg 1932 1940 - Mar 1 0:00 0 - |
574756e4 SW |
56 | Rule Arg 1932 1939 - Nov 1 0:00 1:00 - |
57 | Rule Arg 1940 only - Jul 1 0:00 1:00 - | |
984263bc | 58 | Rule Arg 1941 only - Jun 15 0:00 0 - |
574756e4 | 59 | Rule Arg 1941 only - Oct 15 0:00 1:00 - |
984263bc | 60 | Rule Arg 1943 only - Aug 1 0:00 0 - |
574756e4 | 61 | Rule Arg 1943 only - Oct 15 0:00 1:00 - |
984263bc | 62 | Rule Arg 1946 only - Mar 1 0:00 0 - |
574756e4 | 63 | Rule Arg 1946 only - Oct 1 0:00 1:00 - |
984263bc | 64 | Rule Arg 1963 only - Oct 1 0:00 0 - |
574756e4 | 65 | Rule Arg 1963 only - Dec 15 0:00 1:00 - |
984263bc | 66 | Rule Arg 1964 1966 - Mar 1 0:00 0 - |
574756e4 | 67 | Rule Arg 1964 1966 - Oct 15 0:00 1:00 - |
984263bc | 68 | Rule Arg 1967 only - Apr 2 0:00 0 - |
574756e4 | 69 | Rule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 - |
984263bc | 70 | Rule Arg 1968 1969 - Apr Sun>=1 0:00 0 - |
574756e4 | 71 | Rule Arg 1974 only - Jan 23 0:00 1:00 - |
984263bc | 72 | Rule Arg 1974 only - May 1 0:00 0 - |
574756e4 | 73 | Rule Arg 1988 only - Dec 1 0:00 1:00 - |
984263bc | 74 | # |
9ffe4b14 | 75 | # From Hernan G. Otero (1995-06-26): |
984263bc MD |
76 | # These corrections were contributed by InterSoft Argentina S.A., |
77 | # obtaining the data from the: | |
48afb8ac | 78 | # Talleres de Hidrografía Naval Argentina |
984263bc | 79 | # (Argentine Naval Hydrography Institute) |
984263bc | 80 | Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 - |
574756e4 | 81 | Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 - |
984263bc | 82 | # |
9ffe4b14 | 83 | # From Hernan G. Otero (1995-06-26): |
984263bc MD |
84 | # From this moment on, the law that mandated the daylight saving |
85 | # time corrections was derogated and no more modifications | |
86 | # to the time zones (for daylight saving) are now made. | |
87 | # | |
88 | # From Rives McDow (2000-01-10): | |
89 | # On October 3, 1999, 0:00 local, Argentina implemented daylight savings time, | |
90 | # which did not result in the switch of a time zone, as they stayed 9 hours | |
91 | # from the International Date Line. | |
574756e4 | 92 | Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 - |
cd57c7c2 SW |
93 | # From Paul Eggert (2007-12-28): |
94 | # DST was set to expire on March 5, not March 3, but since it was converted | |
95 | # to standard time on March 3 it's more convenient for us to pretend that | |
96 | # it ended on March 3. | |
97 | Rule Arg 2000 only - Mar 3 0:00 0 - | |
984263bc MD |
98 | # |
99 | # From Peter Gradelski via Steffen Thorsen (2000-03-01): | |
48afb8ac | 100 | # We just checked with our São Paulo office and they say the government of |
984263bc MD |
101 | # Argentina decided not to become one of the countries that go on or off DST. |
102 | # So Buenos Aires should be -3 hours from GMT at all times. | |
103 | # | |
48afb8ac | 104 | # From Fabián L. Arce Jofré (2000-04-04): |
984263bc | 105 | # The law that claimed DST for Argentina was derogated by President Fernando |
48afb8ac | 106 | # de la Rúa on March 2, 2000, because it would make people spend more energy |
984263bc MD |
107 | # in the winter time, rather than less. The change took effect on March 3. |
108 | # | |
109 | # From Mariano Absatz (2001-06-06): | |
110 | # one of the major newspapers here in Argentina said that the 1999 | |
111 | # Timezone Law (which never was effectively applied) will (would?) be | |
112 | # in effect.... The article is at | |
113 | # http://ar.clarin.com/diario/2001-06-06/e-01701.htm | |
32e0bed6 | 114 | # ... The Law itself is "Ley No. 25155", sanctioned on 1999-08-25, enacted |
984263bc MD |
115 | # 1999-09-17, and published 1999-09-21. The official publication is at: |
116 | # http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF | |
117 | # Regretfully, you have to subscribe (and pay) for the on-line version.... | |
118 | # | |
119 | # (2001-06-12): | |
120 | # the timezone for Argentina will not change next Sunday. | |
121 | # Apparently it will do so on Sunday 24th.... | |
122 | # http://ar.clarin.com/diario/2001-06-12/s-03501.htm | |
123 | # | |
124 | # (2001-06-25): | |
125 | # Last Friday (yes, the last working day before the date of the change), the | |
126 | # Senate annulled the 1999 law that introduced the changes later postponed. | |
127 | # http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm | |
128 | # It remains the vote of the Deputies..., but it will be the same.... | |
129 | # This kind of things had always been done this way in Argentina. | |
130 | # We are still -03:00 all year round in all of the country. | |
131 | # | |
cd57c7c2 SW |
132 | # From Steffen Thorsen (2007-12-21): |
133 | # A user (Leonardo Chaim) reported that Argentina will adopt DST.... | |
134 | # all of the country (all Zone-entries) are affected. News reports like | |
135 | # http://www.lanacion.com.ar/opinion/nota.asp?nota_id=973037 indicate | |
136 | # that Argentina will use DST next year as well, from October to | |
137 | # March, although exact rules are not given. | |
138 | # | |
48afb8ac | 139 | # From Jesper Nørgaard Welen (2007-12-26) |
cd57c7c2 | 140 | # The last hurdle of Argentina DST is over, the proposal was approved in |
48afb8ac | 141 | # the lower chamber too (Diputados) with a vote 192 for and 2 against. |
cd57c7c2 SW |
142 | # By the way thanks to Mariano Absatz and Daniel Mario Vega for the link to |
143 | # the original scanned proposal, where the dates and the zero hours are | |
144 | # clear and unambiguous...This is the article about final approval: | |
cd57c7c2 | 145 | # http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996 |
cd57c7c2 SW |
146 | # |
147 | # From Paul Eggert (2007-12-22): | |
148 | # For dates after mid-2008, the following rules are my guesses and | |
149 | # are quite possibly wrong, but are more likely than no DST at all. | |
234dfcd0 SW |
150 | |
151 | # From Alexander Krivenyshev (2008-09-05): | |
152 | # As per message from Carlos Alberto Fonseca Arauz (Nicaragua), | |
153 | # Argentina will start DST on Sunday October 19, 2008. | |
154 | # | |
234dfcd0 | 155 | # http://www.worldtimezone.com/dst_news/dst_news_argentina03.html |
234dfcd0 | 156 | # http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish) |
234dfcd0 | 157 | |
32e0bed6 SW |
158 | # From Juan Manuel Docile in https://bugs.gentoo.org/240339 (2008-10-07) |
159 | # via Rodrigo Severo: | |
160 | # Argentinian law No. 25.155 is no longer valid. | |
0fbb2fac | 161 | # http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm |
32e0bed6 | 162 | # The new one is law No. 26.350 |
0fbb2fac | 163 | # http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm |
0fbb2fac SW |
164 | # So there is no summer time in Argentina for now. |
165 | ||
7b7bc5bd | 166 | # From Mariano Absatz (2008-10-20): |
48afb8ac SW |
167 | # Decree 1693/2008 applies Law 26.350 for the summer 2008/2009 establishing DST |
168 | # in Argentina from 2008-10-19 until 2009-03-15. | |
7b7bc5bd | 169 | # http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01 |
7b7bc5bd | 170 | # |
48afb8ac SW |
171 | |
172 | # Decree 1705/2008 excepting 12 Provinces from applying DST in the summer | |
173 | # 2008/2009: Catamarca, La Rioja, Mendoza, Salta, San Juan, San Luis, La | |
174 | # Pampa, Neuquén, Rio Negro, Chubut, Santa Cruz and Tierra del Fuego | |
7b7bc5bd | 175 | # http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01 |
7b7bc5bd | 176 | # |
48afb8ac SW |
177 | # Press release 235 dated Saturday October 18th, from the Government of the |
178 | # Province of Jujuy saying it will not apply DST either (even when it was not | |
179 | # included in Decree 1705/2008). | |
7b7bc5bd | 180 | # http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc |
7b7bc5bd | 181 | |
ddd6bafc SW |
182 | # From fullinet (2009-10-18): |
183 | # As announced in | |
ddd6bafc | 184 | # http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356 |
48afb8ac SW |
185 | # (an official .gob.ar) under title: "Sin Cambio de Hora" |
186 | # (English: "No hour change"). | |
ddd6bafc | 187 | # |
48afb8ac SW |
188 | # "Por el momento, el Gobierno Nacional resolvió no modificar la hora |
189 | # oficial, decisión que estaba en estudio para su implementación el | |
190 | # domingo 18 de octubre. Desde el Ministerio de Planificación se anunció | |
191 | # que la Argentina hoy, en estas condiciones meteorológicas, no necesita | |
192 | # la modificación del huso horario, ya que 2009 nos encuentra con | |
193 | # crecimiento en la producción y distribución energética." | |
ddd6bafc | 194 | |
574756e4 | 195 | Rule Arg 2007 only - Dec 30 0:00 1:00 - |
ddd6bafc | 196 | Rule Arg 2008 2009 - Mar Sun>=15 0:00 0 - |
574756e4 | 197 | Rule Arg 2008 only - Oct Sun>=15 0:00 1:00 - |
63562808 | 198 | |
ba5ba9da JR |
199 | # From Mariano Absatz (2004-05-21): |
200 | # Today it was officially published that the Province of Mendoza is changing | |
201 | # its timezone this winter... starting tomorrow night.... | |
202 | # http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf | |
203 | # From Paul Eggert (2004-05-24): | |
204 | # It's Law No. 7,210. This change is due to a public power emergency, so for | |
205 | # now we'll assume it's for this year only. | |
984263bc | 206 | # |
574756e4 | 207 | # From Paul Eggert (2018-01-31): |
48afb8ac SW |
208 | # Hora de verano para la República Argentina |
209 | # http://buenasiembra.com.ar/esoterismo/astrologia/hora-de-verano-de-la-republica-argentina-27.html | |
210 | # says that standard time in Argentina from 1894-10-31 | |
984263bc | 211 | # to 1920-05-01 was -4:16:48.25. Go with this more-precise value |
574756e4 SW |
212 | # over Shanks & Pottenger. It is upward compatible with Milne, who |
213 | # says Córdoba time was -4:16:48.2. | |
214 | ||
ba5ba9da JR |
215 | # |
216 | # From Mariano Absatz (2004-06-05): | |
217 | # These media articles from a major newspaper mostly cover the current state: | |
218 | # http://www.lanacion.com.ar/04/05/27/de_604825.asp | |
219 | # http://www.lanacion.com.ar/04/05/28/de_605203.asp | |
220 | # | |
221 | # The following eight (8) provinces pulled clocks back to UTC-04:00 at | |
222 | # midnight Monday May 31st. (that is, the night between 05/31 and 06/01). | |
223 | # Apparently, all nine provinces would go back to UTC-03:00 at the same | |
224 | # time in October 17th. | |
225 | # | |
226 | # Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz, | |
48afb8ac | 227 | # Tierra del Fuego, Tucumán. |
ba5ba9da JR |
228 | # |
229 | # From Mariano Absatz (2004-06-14): | |
48afb8ac | 230 | # ... this weekend, the Province of Tucumán decided it'd go back to UTC-03:00 |
ba5ba9da JR |
231 | # yesterday midnight (that is, at 24:00 Saturday 12th), since the people's |
232 | # annoyance with the change is much higher than the power savings obtained.... | |
233 | # | |
234 | # From Gwillim Law (2004-06-14): | |
235 | # http://www.lanacion.com.ar/04/06/10/de_609078.asp ... | |
236 | # "The time change in Tierra del Fuego was a conflicted decision from | |
237 | # the start. The government had decreed that the measure would take | |
238 | # effect on June 1, but a normative error forced the new time to begin | |
239 | # three days earlier, from a Saturday to a Sunday.... | |
240 | # Our understanding was that the change was originally scheduled to take place | |
241 | # on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other | |
242 | # provinces). Sunday was May 30, only two days earlier. So the article | |
243 | # contains a contradiction. I would give more credence to the Saturday/Sunday | |
244 | # date than the "three days earlier" phrase, and conclude that Tierra del | |
245 | # Fuego set its clocks back at 2004-05-30 00:00. | |
bc95ec93 SW |
246 | # |
247 | # From Steffen Thorsen (2004-10-05): | |
248 | # The previous law 7210 which changed the province of Mendoza's time zone | |
249 | # back in May have been modified slightly in a new law 7277, which set the | |
250 | # new end date to 2004-09-26 (original date was 2004-10-17). | |
251 | # http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf | |
252 | # | |
253 | # From Mariano Absatz (2004-10-05): | |
254 | # San Juan changed from UTC-03:00 to UTC-04:00 at midnight between | |
255 | # Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00 | |
256 | # at midnight between Saturday, July 24th and Sunday, July 25th.... | |
257 | # http://www.sanjuan.gov.ar/prensa/archivo/000329.html | |
258 | # http://www.sanjuan.gov.ar/prensa/archivo/000426.html | |
259 | # http://www.sanjuan.gov.ar/prensa/archivo/000441.html | |
984263bc | 260 | |
e4a74243 SW |
261 | # From Alex Krivenyshev (2008-01-17): |
262 | # Here are articles that Argentina Province San Luis is planning to end DST | |
263 | # as earlier as upcoming Monday January 21, 2008 or February 2008: | |
264 | # | |
48afb8ac | 265 | # Provincia argentina retrasa reloj y marca diferencia con resto del país |
e4a74243 SW |
266 | # (Argentine Province delayed clock and mark difference with the rest of the |
267 | # country) | |
e4a74243 | 268 | # http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel |
e4a74243 SW |
269 | # |
270 | # Es inminente que en San Luis atrasen una hora los relojes | |
271 | # (It is imminent in San Luis clocks one hour delay) | |
e4ac9488 SW |
272 | # https://www.lagaceta.com.ar/nota/253414/Economia/Es-inminente-que-en-San-Luis-atrasen-una-hora-los-relojes.html |
273 | # http://www.worldtimezone.com/dst_news/dst_news_argentina02.html | |
e4a74243 | 274 | |
48afb8ac | 275 | # From Jesper Nørgaard Welen (2008-01-18): |
e4a74243 | 276 | # The page of the San Luis provincial government |
e4a74243 | 277 | # http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812 |
e4a74243 SW |
278 | # confirms what Alex Krivenyshev has earlier sent to the tz |
279 | # emailing list about that San Luis plans to return to standard | |
280 | # time much earlier than the rest of the country. It also | |
63562808 SW |
281 | # confirms that upon request the provinces San Juan and Mendoza |
282 | # refused to follow San Luis in this change. | |
283 | # | |
48afb8ac | 284 | # The change is supposed to take place Monday the 21st at 0:00 |
e4a74243 SW |
285 | # hours. As far as I understand it if this goes ahead, we need |
286 | # a new timezone for San Luis (although there are also documented | |
287 | # independent changes in the southamerica file of San Luis in | |
288 | # 1990 and 1991 which has not been confirmed). | |
289 | ||
48afb8ac | 290 | # From Jesper Nørgaard Welen (2008-01-25): |
e4a74243 SW |
291 | # Unfortunately the below page has become defunct, about the San Luis |
292 | # time change. Perhaps because it now is part of a group of pages "Most | |
293 | # important pages of 2008." | |
294 | # | |
295 | # You can use | |
e4a74243 | 296 | # http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834 |
e4a74243 SW |
297 | # instead it seems. Or use "Buscador" from the main page of the San Luis |
298 | # government, and fill in "huso" and click OK, and you will get 3 pages | |
299 | # from which the first one is identical to the above. | |
300 | ||
301 | # From Mariano Absatz (2008-01-28): | |
302 | # I can confirm that the Province of San Luis (and so far only that | |
303 | # province) decided to go back to UTC-3 effective midnight Jan 20th 2008 | |
304 | # (that is, Monday 21st at 0:00 is the time the clocks were delayed back | |
305 | # 1 hour), and they intend to keep UTC-3 as their timezone all year round | |
306 | # (that is, unless they change their mind any minute now). | |
307 | # | |
308 | # So we'll have to add yet another city to 'southamerica' (I think San | |
309 | # Luis city is the mos populated city in the Province, so it'd be | |
310 | # America/Argentina/San_Luis... of course I can't remember if San Luis's | |
311 | # history of particular changes goes along with Mendoza or San Juan :-( | |
312 | # (I only remember not being able to collect hard facts about San Luis | |
313 | # back in 2004, when these provinces changed to UTC-4 for a few days, I | |
314 | # mailed them personally and never got an answer). | |
315 | ||
48afb8ac SW |
316 | # From Paul Eggert (2014-08-12): |
317 | # Unless otherwise specified, data entries are from Shanks & Pottenger through | |
318 | # 1992, from the IATA otherwise. As noted below, Shanks & Pottenger say that | |
a36b983e SW |
319 | # America/Cordoba split into 6 subregions during 1991/1992, one of which |
320 | # was America/San_Luis, but we haven't verified this yet so for now we'll | |
321 | # keep America/Cordoba a single region rather than splitting it into the | |
322 | # other 5 subregions. | |
323 | ||
63562808 SW |
324 | # From Mariano Absatz (2009-03-13): |
325 | # Yesterday (with our usual 2-day notice) the Province of San Luis | |
326 | # decided that next Sunday instead of "staying" @utc-03:00 they will go | |
327 | # to utc-04:00 until the second Saturday in October... | |
328 | # | |
329 | # The press release is at | |
63562808 | 330 | # http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102 |
48afb8ac SW |
331 | # (I couldn't find the decree, but www.sanluis.gov.ar |
332 | # is the official page for the Province Government.) | |
63562808 | 333 | # |
80e7e01d | 334 | # There's also a note in only one of the major national papers ... |
63562808 | 335 | # http://www.lanacion.com.ar/nota.asp?nota_id=1107912 |
63562808 | 336 | # |
80e7e01d SW |
337 | # The press release says [quick and dirty translation]: |
338 | # ... announced that next Sunday, at 00:00, Puntanos (the San Luis | |
63562808 SW |
339 | # inhabitants) will have to turn back one hour their clocks |
340 | # | |
341 | # Since then, San Luis will establish its own Province timezone. Thus, | |
342 | # during 2009, this timezone change will run from 00:00 the third Sunday | |
343 | # in March until 24:00 of the second Saturday in October. | |
344 | ||
ddd6bafc SW |
345 | # From Mariano Absatz (2009-10-16): |
346 | # ...the Province of San Luis is a case in itself. | |
0d01c093 | 347 | # |
ddd6bafc | 348 | # The Law at |
ddd6bafc | 349 | # http://www.diputadossanluis.gov.ar/diputadosasp/paginas/verNorma.asp?NormaID=276 |
ddd6bafc SW |
350 | # is ambiguous because establishes a calendar from the 2nd Sunday in |
351 | # October at 0:00 thru the 2nd Saturday in March at 24:00 and the | |
352 | # complement of that starting on the 2nd Sunday of March at 0:00 and | |
353 | # ending on the 2nd Saturday of March at 24:00. | |
984263bc | 354 | # |
ddd6bafc SW |
355 | # This clearly breaks every time the 1st of March or October is a Sunday. |
356 | # | |
357 | # IMHO, the "spirit of the Law" is to make the changes at 0:00 on the 2nd | |
358 | # Sunday of October and March. | |
359 | # | |
360 | # The problem is that the changes in the rest of the Provinces that did | |
361 | # change in 2007/2008, were made according to the Federal Law and Decrees | |
362 | # that did so on the 3rd Sunday of October and March. | |
363 | # | |
364 | # In fact, San Luis actually switched from UTC-4 to UTC-3 last Sunday | |
365 | # (October 11th) at 0:00. | |
366 | # | |
367 | # So I guess a new set of rules, besides "Arg", must be made and the last | |
368 | # America/Argentina/San_Luis entries should change to use these... | |
ddd6bafc | 369 | # ... |
0d01c093 | 370 | |
72a17f7b | 371 | # From Alexander Krivenyshev (2010-04-09): |
48afb8ac | 372 | # According to news reports from El Diario de la República Province San |
72a17f7b | 373 | # Luis, Argentina (standard time UTC-04) will keep Daylight Saving Time |
48afb8ac | 374 | # after April 11, 2010 - will continue to have same time as rest of |
72a17f7b SW |
375 | # Argentina (UTC-3) (no DST). |
376 | # | |
48afb8ac | 377 | # Confirmaron la prórroga del huso horario de verano (Spanish) |
72a17f7b | 378 | # http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9 |
72a17f7b | 379 | # or (some English translation): |
72a17f7b | 380 | # http://www.worldtimezone.com/dst_news/dst_news_argentina08.html |
72a17f7b SW |
381 | |
382 | # From Mariano Absatz (2010-04-12): | |
383 | # yes...I can confirm this...and given that San Luis keeps calling | |
384 | # UTC-03:00 "summer time", we should't just let San Luis go back to "Arg" | |
385 | # rules...San Luis is still using "Western ARgentina Time" and it got | |
386 | # stuck on Summer daylight savings time even though the summer is over. | |
387 | ||
574756e4 | 388 | # From Paul Eggert (2018-01-23): |
c7dd9e99 | 389 | # Perhaps San Luis operates on the legal fiction that it is at -04 |
574756e4 | 390 | # with perpetual daylight saving time, but ordinary usage typically seems to |
c7dd9e99 | 391 | # just say it's at -03; see, for example, |
e4ac9488 | 392 | # https://es.wikipedia.org/wiki/Hora_oficial_argentina |
d1bcb6be SW |
393 | # We've documented similar situations as being plain changes to |
394 | # standard time, so let's do that here too. This does not change UTC | |
395 | # offsets, only tm_isdst and the time zone abbreviations. One minor | |
396 | # plus is that this silences a zic complaint that there's no POSIX TZ | |
8cb73418 | 397 | # setting for timestamps past 2038. |
d1bcb6be | 398 | |
21152149 | 399 | # Zone NAME STDOFF RULES FORMAT [UNTIL] |
984263bc | 400 | # |
ba5ba9da | 401 | # Buenos Aires (BA), Capital Federal (CF), |
48afb8ac SW |
402 | Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31 |
403 | -4:16:48 - CMT 1920 May # Córdoba Mean Time | |
83b0991f SW |
404 | -4:00 - -04 1930 Dec |
405 | -4:00 Arg -04/-03 1969 Oct 5 | |
406 | -3:00 Arg -03/-02 1999 Oct 3 | |
407 | -4:00 Arg -04/-03 2000 Mar 3 | |
408 | -3:00 Arg -03/-02 | |
984263bc | 409 | # |
48afb8ac | 410 | # Córdoba (CB), Santa Fe (SF), Entre Ríos (ER), Corrientes (CN), Misiones (MN), |
7b7bc5bd | 411 | # Chaco (CC), Formosa (FM), Santiago del Estero (SE) |
984263bc | 412 | # |
bd7414aa | 413 | # Shanks & Pottenger also make the following claims, which we haven't verified: |
984263bc | 414 | # - Formosa switched to -3:00 on 1991-01-07. |
984263bc MD |
415 | # - Misiones switched to -3:00 on 1990-12-29. |
416 | # - Chaco switched to -3:00 on 1991-01-04. | |
984263bc MD |
417 | # - Santiago del Estero switched to -4:00 on 1991-04-01, |
418 | # then to -3:00 on 1991-04-26. | |
984263bc | 419 | # |
ba5ba9da JR |
420 | Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31 |
421 | -4:16:48 - CMT 1920 May | |
83b0991f SW |
422 | -4:00 - -04 1930 Dec |
423 | -4:00 Arg -04/-03 1969 Oct 5 | |
424 | -3:00 Arg -03/-02 1991 Mar 3 | |
425 | -4:00 - -04 1991 Oct 20 | |
426 | -3:00 Arg -03/-02 1999 Oct 3 | |
427 | -4:00 Arg -04/-03 2000 Mar 3 | |
428 | -3:00 Arg -03/-02 | |
ba5ba9da | 429 | # |
48afb8ac | 430 | # Salta (SA), La Pampa (LP), Neuquén (NQ), Rio Negro (RN) |
7b7bc5bd SW |
431 | Zone America/Argentina/Salta -4:21:40 - LMT 1894 Oct 31 |
432 | -4:16:48 - CMT 1920 May | |
83b0991f SW |
433 | -4:00 - -04 1930 Dec |
434 | -4:00 Arg -04/-03 1969 Oct 5 | |
435 | -3:00 Arg -03/-02 1991 Mar 3 | |
436 | -4:00 - -04 1991 Oct 20 | |
437 | -3:00 Arg -03/-02 1999 Oct 3 | |
438 | -4:00 Arg -04/-03 2000 Mar 3 | |
439 | -3:00 Arg -03/-02 2008 Oct 18 | |
440 | -3:00 - -03 | |
7b7bc5bd | 441 | # |
48afb8ac | 442 | # Tucumán (TM) |
ba5ba9da | 443 | Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31 |
984263bc | 444 | -4:16:48 - CMT 1920 May |
83b0991f SW |
445 | -4:00 - -04 1930 Dec |
446 | -4:00 Arg -04/-03 1969 Oct 5 | |
447 | -3:00 Arg -03/-02 1991 Mar 3 | |
448 | -4:00 - -04 1991 Oct 20 | |
449 | -3:00 Arg -03/-02 1999 Oct 3 | |
450 | -4:00 Arg -04/-03 2000 Mar 3 | |
451 | -3:00 - -03 2004 Jun 1 | |
452 | -4:00 - -04 2004 Jun 13 | |
453 | -3:00 Arg -03/-02 | |
ba5ba9da JR |
454 | # |
455 | # La Rioja (LR) | |
456 | Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31 | |
457 | -4:16:48 - CMT 1920 May | |
83b0991f SW |
458 | -4:00 - -04 1930 Dec |
459 | -4:00 Arg -04/-03 1969 Oct 5 | |
460 | -3:00 Arg -03/-02 1991 Mar 1 | |
461 | -4:00 - -04 1991 May 7 | |
462 | -3:00 Arg -03/-02 1999 Oct 3 | |
463 | -4:00 Arg -04/-03 2000 Mar 3 | |
464 | -3:00 - -03 2004 Jun 1 | |
465 | -4:00 - -04 2004 Jun 20 | |
466 | -3:00 Arg -03/-02 2008 Oct 18 | |
467 | -3:00 - -03 | |
ba5ba9da JR |
468 | # |
469 | # San Juan (SJ) | |
470 | Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31 | |
471 | -4:16:48 - CMT 1920 May | |
83b0991f SW |
472 | -4:00 - -04 1930 Dec |
473 | -4:00 Arg -04/-03 1969 Oct 5 | |
474 | -3:00 Arg -03/-02 1991 Mar 1 | |
475 | -4:00 - -04 1991 May 7 | |
476 | -3:00 Arg -03/-02 1999 Oct 3 | |
477 | -4:00 Arg -04/-03 2000 Mar 3 | |
478 | -3:00 - -03 2004 May 31 | |
479 | -4:00 - -04 2004 Jul 25 | |
480 | -3:00 Arg -03/-02 2008 Oct 18 | |
481 | -3:00 - -03 | |
984263bc MD |
482 | # |
483 | # Jujuy (JY) | |
ba5ba9da | 484 | Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31 |
984263bc | 485 | -4:16:48 - CMT 1920 May |
83b0991f SW |
486 | -4:00 - -04 1930 Dec |
487 | -4:00 Arg -04/-03 1969 Oct 5 | |
488 | -3:00 Arg -03/-02 1990 Mar 4 | |
489 | -4:00 - -04 1990 Oct 28 | |
490 | -4:00 1:00 -03 1991 Mar 17 | |
491 | -4:00 - -04 1991 Oct 6 | |
492 | -3:00 1:00 -02 1992 | |
493 | -3:00 Arg -03/-02 1999 Oct 3 | |
494 | -4:00 Arg -04/-03 2000 Mar 3 | |
495 | -3:00 Arg -03/-02 2008 Oct 18 | |
496 | -3:00 - -03 | |
984263bc | 497 | # |
9ffe4b14 | 498 | # Catamarca (CT), Chubut (CH) |
ba5ba9da | 499 | Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31 |
984263bc | 500 | -4:16:48 - CMT 1920 May |
83b0991f SW |
501 | -4:00 - -04 1930 Dec |
502 | -4:00 Arg -04/-03 1969 Oct 5 | |
503 | -3:00 Arg -03/-02 1991 Mar 3 | |
504 | -4:00 - -04 1991 Oct 20 | |
505 | -3:00 Arg -03/-02 1999 Oct 3 | |
506 | -4:00 Arg -04/-03 2000 Mar 3 | |
507 | -3:00 - -03 2004 Jun 1 | |
508 | -4:00 - -04 2004 Jun 20 | |
509 | -3:00 Arg -03/-02 2008 Oct 18 | |
510 | -3:00 - -03 | |
984263bc MD |
511 | # |
512 | # Mendoza (MZ) | |
ba5ba9da | 513 | Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31 |
984263bc | 514 | -4:16:48 - CMT 1920 May |
83b0991f SW |
515 | -4:00 - -04 1930 Dec |
516 | -4:00 Arg -04/-03 1969 Oct 5 | |
517 | -3:00 Arg -03/-02 1990 Mar 4 | |
518 | -4:00 - -04 1990 Oct 15 | |
519 | -4:00 1:00 -03 1991 Mar 1 | |
520 | -4:00 - -04 1991 Oct 15 | |
521 | -4:00 1:00 -03 1992 Mar 1 | |
522 | -4:00 - -04 1992 Oct 18 | |
523 | -3:00 Arg -03/-02 1999 Oct 3 | |
524 | -4:00 Arg -04/-03 2000 Mar 3 | |
525 | -3:00 - -03 2004 May 23 | |
526 | -4:00 - -04 2004 Sep 26 | |
527 | -3:00 Arg -03/-02 2008 Oct 18 | |
528 | -3:00 - -03 | |
ba5ba9da | 529 | # |
e4a74243 | 530 | # San Luis (SL) |
ddd6bafc | 531 | |
72a17f7b | 532 | Rule SanLuis 2008 2009 - Mar Sun>=8 0:00 0 - |
574756e4 | 533 | Rule SanLuis 2007 2008 - Oct Sun>=8 0:00 1:00 - |
ddd6bafc | 534 | |
e4a74243 SW |
535 | Zone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31 |
536 | -4:16:48 - CMT 1920 May | |
83b0991f SW |
537 | -4:00 - -04 1930 Dec |
538 | -4:00 Arg -04/-03 1969 Oct 5 | |
539 | -3:00 Arg -03/-02 1990 | |
540 | -3:00 1:00 -02 1990 Mar 14 | |
541 | -4:00 - -04 1990 Oct 15 | |
542 | -4:00 1:00 -03 1991 Mar 1 | |
543 | -4:00 - -04 1991 Jun 1 | |
544 | -3:00 - -03 1999 Oct 3 | |
545 | -4:00 1:00 -03 2000 Mar 3 | |
546 | -3:00 - -03 2004 May 31 | |
547 | -4:00 - -04 2004 Jul 25 | |
548 | -3:00 Arg -03/-02 2008 Jan 21 | |
549 | -4:00 SanLuis -04/-03 2009 Oct 11 | |
550 | -3:00 - -03 | |
e4a74243 | 551 | # |
ba5ba9da | 552 | # Santa Cruz (SC) |
48afb8ac | 553 | Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31 |
83b0991f SW |
554 | -4:16:48 - CMT 1920 May |
555 | -4:00 - -04 1930 Dec | |
556 | -4:00 Arg -04/-03 1969 Oct 5 | |
557 | -3:00 Arg -03/-02 1999 Oct 3 | |
558 | -4:00 Arg -04/-03 2000 Mar 3 | |
559 | -3:00 - -03 2004 Jun 1 | |
560 | -4:00 - -04 2004 Jun 20 | |
561 | -3:00 Arg -03/-02 2008 Oct 18 | |
562 | -3:00 - -03 | |
ba5ba9da | 563 | # |
48afb8ac SW |
564 | # Tierra del Fuego, Antártida e Islas del Atlántico Sur (TF) |
565 | Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31 | |
83b0991f SW |
566 | -4:16:48 - CMT 1920 May |
567 | -4:00 - -04 1930 Dec | |
568 | -4:00 Arg -04/-03 1969 Oct 5 | |
569 | -3:00 Arg -03/-02 1999 Oct 3 | |
570 | -4:00 Arg -04/-03 2000 Mar 3 | |
571 | -3:00 - -03 2004 May 30 | |
572 | -4:00 - -04 2004 Jun 20 | |
573 | -3:00 Arg -03/-02 2008 Oct 18 | |
574 | -3:00 - -03 | |
984263bc MD |
575 | |
576 | # Aruba | |
65adea1d | 577 | # See America/Puerto_Rico. |
984263bc MD |
578 | |
579 | # Bolivia | |
21152149 | 580 | # Zone NAME STDOFF RULES FORMAT [UNTIL] |
984263bc MD |
581 | Zone America/La_Paz -4:32:36 - LMT 1890 |
582 | -4:32:36 - CMT 1931 Oct 15 # Calamarca MT | |
a3b9d54d | 583 | -4:32:36 1:00 BST 1932 Mar 21 # Bolivia ST |
83b0991f | 584 | -4:00 - -04 |
984263bc MD |
585 | |
586 | # Brazil | |
587 | ||
9ffe4b14 | 588 | # From Paul Eggert (1993-11-18): |
984263bc MD |
589 | # The mayor of Rio recently attempted to change the time zone rules |
590 | # just in his city, in order to leave more summer time for the tourist trade. | |
591 | # The rule change lasted only part of the day; | |
592 | # the federal government refused to follow the city's rules, and business | |
593 | # was in a chaos, so the mayor backed down that afternoon. | |
594 | ||
595 | # From IATA SSIM (1996-02): | |
596 | # _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS), | |
48afb8ac SW |
597 | # Santa Catarina (SC), Paraná (PR), São Paulo (SP), Rio de Janeiro (RJ), |
598 | # Espírito Santo (ES), Minas Gerais (MG), Bahia (BA), Goiás (GO), | |
984263bc MD |
599 | # Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL]. |
600 | # [The last three states are new to this issue of the IATA SSIM.] | |
601 | ||
602 | # From Gwillim Law (1996-10-07): | |
48afb8ac | 603 | # Geography, history (Tocantins was part of Goiás until 1989), and other |
984263bc MD |
604 | # sources of time zone information lead me to believe that AL, SE, and TO were |
605 | # always in BR1, and so the only change was whether or not they observed DST.... | |
606 | # The earliest issue of the SSIM I have is 2/91. Each issue from then until | |
607 | # 9/95 says that DST is observed only in the ten states I quoted from 9/95, | |
608 | # along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2 | |
609 | # (UTC-4).... The other two time zones given for Brazil are BR3, which is | |
610 | # UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is | |
611 | # UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's | |
612 | # become part of the state of Pernambuco). The boundary between BR1 and BR2 | |
613 | # has never been clearly stated. They've simply been called East and West. | |
614 | # However, some conclusions can be drawn from another IATA manual: the Airline | |
615 | # Coding Directory, which lists close to 400 airports in Brazil. For each | |
616 | # airport it gives a time zone which is coded to the SSIM. From that | |
48afb8ac SW |
617 | # information, I'm led to conclude that the states of Amapá (AP), Ceará (CE), |
618 | # Maranhão (MA), Paraíba (PR), Pernambuco (PE), Piauí (PI), and Rio Grande do | |
619 | # Norte (RN), and the eastern part of Pará (PA) are all in BR1 without DST. | |
984263bc MD |
620 | |
621 | # From Marcos Tadeu (1998-09-27): | |
48afb8ac | 622 | # Brazilian official page <http://pcdsh01.on.br/verao1.html> |
984263bc | 623 | |
48afb8ac | 624 | # From Jesper Nørgaard (2000-11-03): |
984263bc MD |
625 | # [For an official list of which regions in Brazil use which time zones, see:] |
626 | # http://pcdsh01.on.br/Fusbr.htm | |
627 | # http://pcdsh01.on.br/Fusbrhv.htm | |
628 | ||
629 | # From Celso Doria via David Madeo (2002-10-09): | |
630 | # The reason for the delay this year has to do with elections in Brazil. | |
631 | # | |
632 | # Unlike in the United States, elections in Brazil are 100% computerized and | |
633 | # the results are known almost immediately. Yesterday, it was the first | |
634 | # round of the elections when 115 million Brazilians voted for President, | |
635 | # Governor, Senators, Federal Deputies, and State Deputies. Nobody is | |
636 | # counting (or re-counting) votes anymore and we know there will be a second | |
637 | # round for the Presidency and also for some Governors. The 2nd round will | |
638 | # take place on October 27th. | |
639 | # | |
640 | # The reason why the DST will only begin November 3rd is that the thousands | |
641 | # of electoral machines used cannot have their time changed, and since the | |
642 | # Constitution says the elections must begin at 8:00 AM and end at 5:00 PM, | |
643 | # the Government decided to postpone DST, instead of changing the Constitution | |
644 | # (maybe, for the next elections, it will be possible to change the clock)... | |
645 | ||
bc95ec93 SW |
646 | # From Rodrigo Severo (2004-10-04): |
647 | # It's just the biannual change made necessary by the much hyped, supposedly | |
648 | # modern Brazilian eletronic voting machines which, apparently, can't deal | |
649 | # with a time change between the first and the second rounds of the elections. | |
650 | ||
bbe9957d SW |
651 | # From Steffen Thorsen (2007-09-20): |
652 | # Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00: | |
653 | # http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975 | |
654 | ||
a36b983e SW |
655 | # From Paul Schulze (2008-06-24): |
656 | # ...by law number 11.662 of April 24, 2008 (published in the "Diario | |
48afb8ac | 657 | # Oficial da União"...) in Brazil there are changes in the timezones, |
a36b983e SW |
658 | # effective today (00:00am at June 24, 2008) as follows: |
659 | # | |
48afb8ac | 660 | # a) The timezone UTC+5 is extinguished, with all the Acre state and the |
a36b983e SW |
661 | # part of the Amazonas state that had this timezone now being put to the |
662 | # timezone UTC+4 | |
48afb8ac | 663 | # b) The whole Pará state now is put at timezone UTC+3, instead of just |
a36b983e SW |
664 | # part of it, as was before. |
665 | # | |
666 | # This change follows a proposal of senator Tiao Viana of Acre state, that | |
667 | # proposed it due to concerns about open television channels displaying | |
668 | # programs inappropriate to youths in the states that had the timezone | |
669 | # UTC+5 too early in the night. In the occasion, some more corrections | |
670 | # were proposed, trying to unify the timezones of any given state. This | |
671 | # change modifies timezone rules defined in decree 2.784 of 18 June, | |
672 | # 1913. | |
673 | ||
674 | # From Rodrigo Severo (2008-06-24): | |
675 | # Just correcting the URL: | |
3dbe7164 | 676 | # https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008 |
a36b983e SW |
677 | # |
678 | # As a result of the above Decree I believe the America/Rio_Branco | |
679 | # timezone shall be modified from UTC-5 to UTC-4 and a new timezone shall | |
48afb8ac | 680 | # be created to represent the...west side of the Pará State. I |
a36b983e SW |
681 | # suggest this new timezone be called Santarem as the most |
682 | # important/populated city in the affected area. | |
683 | # | |
684 | # This new timezone would be the same as the Rio_Branco timezone up to | |
685 | # the 2008/06/24 change which would be to UTC-3 instead of UTC-4. | |
686 | ||
687 | # From Alex Krivenyshev (2008-06-24): | |
688 | # This is a quick reference page for New and Old Brazil Time Zones map. | |
a36b983e | 689 | # http://www.worldtimezone.com/brazil-time-new-old.php |
a36b983e | 690 | # |
48afb8ac SW |
691 | # - 4 time zones replaced by 3 time zones - eliminating time zone UTC-05 |
692 | # (state Acre and the part of the Amazonas will be UTC/GMT-04) - western | |
693 | # part of Par state is moving to one timezone UTC-03 (from UTC-04). | |
a36b983e | 694 | |
984263bc MD |
695 | # From Paul Eggert (2002-10-10): |
696 | # The official decrees referenced below are mostly taken from | |
48afb8ac SW |
697 | # Decretos sobre o Horário de Verão no Brasil. |
698 | # http://pcdsh01.on.br/DecHV.html | |
984263bc | 699 | |
234dfcd0 SW |
700 | # From Steffen Thorsen (2008-08-29): |
701 | # As announced by the government and many newspapers in Brazil late | |
702 | # yesterday, Brazil will start DST on 2008-10-19 (need to change rule) and | |
703 | # it will end on 2009-02-15 (current rule for Brazil is fine). Based on | |
704 | # past years experience with the elections, there was a good chance that | |
705 | # the start was postponed to November, but it did not happen this year. | |
706 | # | |
707 | # It has not yet been posted to http://pcdsh01.on.br/DecHV.html | |
708 | # | |
709 | # An official page about it: | |
234dfcd0 | 710 | # http://www.mme.gov.br/site/news/detail.do?newsId=16722 |
234dfcd0 SW |
711 | # Note that this link does not always work directly, but must be accessed |
712 | # by going to | |
234dfcd0 | 713 | # http://www.mme.gov.br/first |
234dfcd0 SW |
714 | # |
715 | # One example link that works directly: | |
234dfcd0 SW |
716 | # http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54 |
717 | # (Portuguese) | |
234dfcd0 SW |
718 | # |
719 | # We have a written a short article about it as well: | |
e4ac9488 | 720 | # https://www.timeanddate.com/news/time/brazil-dst-2008-2009.html |
7f2a8808 SW |
721 | # |
722 | # From Alexander Krivenyshev (2011-10-04): | |
723 | # State Bahia will return to Daylight savings time this year after 8 years off. | |
724 | # The announcement was made by Governor Jaques Wagner in an interview to a | |
725 | # television station in Salvador. | |
726 | ||
727 | # In Portuguese: | |
7f2a8808 | 728 | # http://g1.globo.com/bahia/noticia/2011/10/governador-jaques-wagner-confirma-horario-de-verao-na-bahia.html |
e4ac9488 | 729 | # https://noticias.terra.com.br/brasil/noticias/0,,OI5390887-EI8139,00-Bahia+volta+a+ter+horario+de+verao+apos+oito+anos.html |
7f2a8808 SW |
730 | |
731 | # From Guilherme Bernardes Rodrigues (2011-10-07): | |
732 | # There is news in the media, however there is still no decree about it. | |
48afb8ac | 733 | # I just send a e-mail to Zulmira Brandao at http://pcdsh01.on.br/ the |
80e7e01d | 734 | # official agency about time in Brazil, and she confirmed that the old rule is |
7f2a8808 | 735 | # still in force. |
234dfcd0 | 736 | |
e9ad9bde SW |
737 | # From Guilherme Bernardes Rodrigues (2011-10-14) |
738 | # It's official, the President signed a decree that includes Bahia in summer | |
739 | # time. | |
740 | # [ and in a second message (same day): ] | |
741 | # I found the decree. | |
742 | # | |
32e0bed6 | 743 | # DECRETO No. 7.584, DE 13 DE OUTUBRO DE 2011 |
e9ad9bde | 744 | # Link : |
e9ad9bde | 745 | # http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6 |
e9ad9bde | 746 | |
f21b88be SW |
747 | # From Kelley Cook (2012-10-16): |
748 | # The governor of state of Bahia in Brazil announced on Thursday that | |
749 | # due to public pressure, he is reversing the DST policy they implemented | |
750 | # last year and will not be going to Summer Time on October 21st.... | |
751 | # http://www.correio24horas.com.br/r/artigo/apos-pressoes-wagner-suspende-horario-de-verao-na-bahia | |
752 | ||
753 | # From Rodrigo Severo (2012-10-16): | |
754 | # Tocantins state will have DST. | |
e4ac9488 | 755 | # https://noticias.terra.com.br/brasil/noticias/0,,OI6232536-EI306.html |
e9ad9bde | 756 | |
d1bcb6be SW |
757 | # From Steffen Thorsen (2013-09-20): |
758 | # Tocantins in Brazil is very likely not to observe DST from October.... | |
759 | # http://conexaoto.com.br/2013/09/18/ministerio-confirma-que-tocantins-esta-fora-do-horario-de-verao-em-2013-mas-falta-publicacao-de-decreto | |
760 | # We will keep this article updated when this is confirmed: | |
e4ac9488 | 761 | # https://www.timeanddate.com/news/time/brazil-starts-dst-2013.html |
d1bcb6be SW |
762 | |
763 | # From Steffen Thorsen (2013-10-17): | |
e4ac9488 | 764 | # https://www.timeanddate.com/news/time/acre-amazonas-change-time-zone.html |
d1bcb6be SW |
765 | # Senator Jorge Viana announced that Acre will change time zone on November 10. |
766 | # He did not specify the time of the change, nor if western parts of Amazonas | |
767 | # will change as well. | |
768 | # | |
769 | # From Paul Eggert (2013-10-17): | |
770 | # For now, assume western Amazonas will change as well. | |
771 | ||
b858e488 | 772 | # Rule NAME FROM TO - IN ON AT SAVE LETTER/S |
48afb8ac SW |
773 | # Decree 20,466 <http://pcdsh01.on.br/HV20466.htm> (1931-10-01) |
774 | # Decree 21,896 <http://pcdsh01.on.br/HV21896.htm> (1932-01-10) | |
574756e4 | 775 | Rule Brazil 1931 only - Oct 3 11:00 1:00 - |
984263bc | 776 | Rule Brazil 1932 1933 - Apr 1 0:00 0 - |
574756e4 | 777 | Rule Brazil 1932 only - Oct 3 0:00 1:00 - |
48afb8ac | 778 | # Decree 23,195 <http://pcdsh01.on.br/HV23195.htm> (1933-10-10) |
984263bc | 779 | # revoked DST. |
48afb8ac SW |
780 | # Decree 27,496 <http://pcdsh01.on.br/HV27496.htm> (1949-11-24) |
781 | # Decree 27,998 <http://pcdsh01.on.br/HV27998.htm> (1950-04-13) | |
574756e4 | 782 | Rule Brazil 1949 1952 - Dec 1 0:00 1:00 - |
984263bc MD |
783 | Rule Brazil 1950 only - Apr 16 1:00 0 - |
784 | Rule Brazil 1951 1952 - Apr 1 0:00 0 - | |
48afb8ac | 785 | # Decree 32,308 <http://pcdsh01.on.br/HV32308.htm> (1953-02-24) |
984263bc | 786 | Rule Brazil 1953 only - Mar 1 0:00 0 - |
48afb8ac | 787 | # Decree 34,724 <http://pcdsh01.on.br/HV34724.htm> (1953-11-30) |
984263bc | 788 | # revoked DST. |
48afb8ac | 789 | # Decree 52,700 <http://pcdsh01.on.br/HV52700.htm> (1963-10-18) |
984263bc MD |
790 | # established DST from 1963-10-23 00:00 to 1964-02-29 00:00 |
791 | # in SP, RJ, GB, MG, ES, due to the prolongation of the drought. | |
48afb8ac | 792 | # Decree 53,071 <http://pcdsh01.on.br/HV53071.htm> (1963-12-03) |
984263bc | 793 | # extended the above decree to all of the national territory on 12-09. |
574756e4 | 794 | Rule Brazil 1963 only - Dec 9 0:00 1:00 - |
48afb8ac | 795 | # Decree 53,604 <http://pcdsh01.on.br/HV53604.htm> (1964-02-25) |
984263bc MD |
796 | # extended summer time by one day to 1964-03-01 00:00 (start of school). |
797 | Rule Brazil 1964 only - Mar 1 0:00 0 - | |
48afb8ac | 798 | # Decree 55,639 <http://pcdsh01.on.br/HV55639.htm> (1965-01-27) |
574756e4 | 799 | Rule Brazil 1965 only - Jan 31 0:00 1:00 - |
984263bc | 800 | Rule Brazil 1965 only - Mar 31 0:00 0 - |
48afb8ac | 801 | # Decree 57,303 <http://pcdsh01.on.br/HV57303.htm> (1965-11-22) |
574756e4 | 802 | Rule Brazil 1965 only - Dec 1 0:00 1:00 - |
48afb8ac | 803 | # Decree 57,843 <http://pcdsh01.on.br/HV57843.htm> (1966-02-18) |
984263bc | 804 | Rule Brazil 1966 1968 - Mar 1 0:00 0 - |
574756e4 | 805 | Rule Brazil 1966 1967 - Nov 1 0:00 1:00 - |
48afb8ac | 806 | # Decree 63,429 <http://pcdsh01.on.br/HV63429.htm> (1968-10-15) |
984263bc | 807 | # revoked DST. |
48afb8ac | 808 | # Decree 91,698 <http://pcdsh01.on.br/HV91698.htm> (1985-09-27) |
574756e4 | 809 | Rule Brazil 1985 only - Nov 2 0:00 1:00 - |
984263bc MD |
810 | # Decree 92,310 (1986-01-21) |
811 | # Decree 92,463 (1986-03-13) | |
812 | Rule Brazil 1986 only - Mar 15 0:00 0 - | |
813 | # Decree 93,316 (1986-10-01) | |
574756e4 | 814 | Rule Brazil 1986 only - Oct 25 0:00 1:00 - |
984263bc | 815 | Rule Brazil 1987 only - Feb 14 0:00 0 - |
48afb8ac | 816 | # Decree 94,922 <http://pcdsh01.on.br/HV94922.htm> (1987-09-22) |
574756e4 | 817 | Rule Brazil 1987 only - Oct 25 0:00 1:00 - |
984263bc | 818 | Rule Brazil 1988 only - Feb 7 0:00 0 - |
48afb8ac | 819 | # Decree 96,676 <http://pcdsh01.on.br/HV96676.htm> (1988-09-12) |
984263bc | 820 | # except for the states of AC, AM, PA, RR, RO, and AP (then a territory) |
574756e4 | 821 | Rule Brazil 1988 only - Oct 16 0:00 1:00 - |
984263bc | 822 | Rule Brazil 1989 only - Jan 29 0:00 0 - |
48afb8ac | 823 | # Decree 98,077 <http://pcdsh01.on.br/HV98077.htm> (1989-08-21) |
984263bc | 824 | # with the same exceptions |
574756e4 | 825 | Rule Brazil 1989 only - Oct 15 0:00 1:00 - |
984263bc | 826 | Rule Brazil 1990 only - Feb 11 0:00 0 - |
48afb8ac | 827 | # Decree 99,530 <http://pcdsh01.on.br/HV99530.htm> (1990-09-17) |
984263bc MD |
828 | # adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF. |
829 | # Decree 99,629 (1990-10-19) adds BA, MT. | |
574756e4 | 830 | Rule Brazil 1990 only - Oct 21 0:00 1:00 - |
984263bc | 831 | Rule Brazil 1991 only - Feb 17 0:00 0 - |
48afb8ac | 832 | # Unnumbered decree <http://pcdsh01.on.br/HV1991.htm> (1991-09-25) |
984263bc | 833 | # adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF. |
574756e4 | 834 | Rule Brazil 1991 only - Oct 20 0:00 1:00 - |
984263bc | 835 | Rule Brazil 1992 only - Feb 9 0:00 0 - |
48afb8ac | 836 | # Unnumbered decree <http://pcdsh01.on.br/HV1992.htm> (1992-10-16) |
984263bc | 837 | # adopted by same states. |
574756e4 | 838 | Rule Brazil 1992 only - Oct 25 0:00 1:00 - |
984263bc | 839 | Rule Brazil 1993 only - Jan 31 0:00 0 - |
48afb8ac | 840 | # Decree 942 <http://pcdsh01.on.br/HV942.htm> (1993-09-28) |
984263bc | 841 | # adopted by same states, plus AM. |
48afb8ac | 842 | # Decree 1,252 <http://pcdsh01.on.br/HV1252.htm> (1994-09-22; |
ba5ba9da | 843 | # web page corrected 2004-01-07) adopted by same states, minus AM. |
48afb8ac | 844 | # Decree 1,636 <http://pcdsh01.on.br/HV1636.htm> (1995-09-14) |
ba5ba9da | 845 | # adopted by same states, plus MT and TO. |
48afb8ac | 846 | # Decree 1,674 <http://pcdsh01.on.br/HV1674.htm> (1995-10-13) |
984263bc | 847 | # adds AL, SE. |
574756e4 | 848 | Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 - |
984263bc MD |
849 | Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 - |
850 | Rule Brazil 1996 only - Feb 11 0:00 0 - | |
48afb8ac | 851 | # Decree 2,000 <http://pcdsh01.on.br/HV2000.htm> (1996-09-04) |
984263bc | 852 | # adopted by same states, minus AL, SE. |
574756e4 | 853 | Rule Brazil 1996 only - Oct 6 0:00 1:00 - |
984263bc | 854 | Rule Brazil 1997 only - Feb 16 0:00 0 - |
9ffe4b14 | 855 | # From Daniel C. Sobral (1998-02-12): |
984263bc MD |
856 | # In 1997, the DS began on October 6. The stated reason was that |
857 | # because international television networks ignored Brazil's policy on DS, | |
858 | # they bought the wrong times on satellite for coverage of Pope's visit. | |
859 | # This year, the ending date of DS was postponed to March 1 | |
860 | # to help dealing with the shortages of electric power. | |
861 | # | |
984263bc | 862 | # Decree 2,317 (1997-09-04), adopted by same states. |
574756e4 | 863 | Rule Brazil 1997 only - Oct 6 0:00 1:00 - |
48afb8ac | 864 | # Decree 2,495 <http://pcdsh01.on.br/figuras/HV2495.JPG> |
984263bc MD |
865 | # (1998-02-10) |
866 | Rule Brazil 1998 only - Mar 1 0:00 0 - | |
48afb8ac | 867 | # Decree 2,780 <http://pcdsh01.on.br/figuras/Hv98.jpg> (1998-09-11) |
984263bc | 868 | # adopted by the same states as before. |
574756e4 | 869 | Rule Brazil 1998 only - Oct 11 0:00 1:00 - |
984263bc | 870 | Rule Brazil 1999 only - Feb 21 0:00 0 - |
48afb8ac | 871 | # Decree 3,150 <http://pcdsh01.on.br/figuras/HV3150.gif> |
984263bc | 872 | # (1999-08-23) adopted by same states. |
48afb8ac | 873 | # Decree 3,188 <http://pcdsh01.on.br/DecHV99.gif> (1999-09-30) |
984263bc | 874 | # adds SE, AL, PB, PE, RN, CE, PI, MA and RR. |
574756e4 | 875 | Rule Brazil 1999 only - Oct 3 0:00 1:00 - |
984263bc | 876 | Rule Brazil 2000 only - Feb 27 0:00 0 - |
48afb8ac | 877 | # Decree 3,592 <http://pcdsh01.on.br/DEC3592.htm> (2000-09-06) |
984263bc | 878 | # adopted by the same states as before. |
48afb8ac | 879 | # Decree 3,630 <http://pcdsh01.on.br/Dec3630.jpg> (2000-10-13) |
984263bc | 880 | # repeals DST in PE and RR, effective 2000-10-15 00:00. |
48afb8ac | 881 | # Decree 3,632 <http://pcdsh01.on.br/Dec3632.jpg> (2000-10-17) |
984263bc | 882 | # repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00. |
48afb8ac | 883 | # Decree 3,916 <http://pcdsh01.on.br/figuras/HV3916.gif> |
984263bc | 884 | # (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE. |
574756e4 | 885 | Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 - |
17f48456 | 886 | Rule Brazil 2001 2006 - Feb Sun>=15 0:00 0 - |
984263bc | 887 | # Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE. |
48afb8ac | 888 | # 4,399 <http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm> |
574756e4 | 889 | Rule Brazil 2002 only - Nov 3 0:00 1:00 - |
ba5ba9da | 890 | # Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO. |
48afb8ac | 891 | # 4,844 <http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm> |
574756e4 | 892 | Rule Brazil 2003 only - Oct 19 0:00 1:00 - |
bc95ec93 | 893 | # Decree 5,223 (2004-10-01) reestablishes DST in MT. |
48afb8ac | 894 | # 5,223 <http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm> |
574756e4 | 895 | Rule Brazil 2004 only - Nov 2 0:00 1:00 - |
48afb8ac | 896 | # Decree 5,539 <http://pcdsh01.on.br/DecHV5539.gif> (2005-09-19), |
aa65d21a | 897 | # adopted by the same states as before. |
574756e4 | 898 | Rule Brazil 2005 only - Oct 16 0:00 1:00 - |
48afb8ac | 899 | # Decree 5,920 <http://pcdsh01.on.br/DecHV5920.gif> (2006-10-03), |
bbe9957d | 900 | # adopted by the same states as before. |
574756e4 | 901 | Rule Brazil 2006 only - Nov 5 0:00 1:00 - |
bbe9957d | 902 | Rule Brazil 2007 only - Feb 25 0:00 0 - |
48afb8ac | 903 | # Decree 6,212 <http://pcdsh01.on.br/DecHV6212.gif> (2007-09-26), |
a36b983e | 904 | # adopted by the same states as before. |
574756e4 | 905 | Rule Brazil 2007 only - Oct Sun>=8 0:00 1:00 - |
bfd634de | 906 | # From Frederico A. C. Neves (2008-09-10): |
96e83414 | 907 | # According to this decree |
bfd634de | 908 | # http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm |
bfd634de SW |
909 | # [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the |
910 | # 3rd Feb Sunday. There is an exception on the return date when this is | |
911 | # the Carnival Sunday then the return date will be the next Sunday... | |
574756e4 | 912 | Rule Brazil 2008 2017 - Oct Sun>=15 0:00 1:00 - |
bfd634de | 913 | Rule Brazil 2008 2011 - Feb Sun>=15 0:00 0 - |
a3b9d54d SW |
914 | # Decree 7,584 <http://pcdsh01.on.br/HVdecreto7584_20111013.jpg> (2011-10-13) |
915 | # added Bahia. | |
bfd634de | 916 | Rule Brazil 2012 only - Feb Sun>=22 0:00 0 - |
a3b9d54d SW |
917 | # Decree 7,826 <http://pcdsh01.on.br/HVdecreto7826_20121015.jpg> (2012-10-15) |
918 | # removed Bahia and added Tocantins. | |
919 | # Decree 8,112 <http://pcdsh01.on.br/HVdecreto8112_20130930.JPG> (2013-09-30) | |
920 | # removed Tocantins. | |
bfd634de SW |
921 | Rule Brazil 2013 2014 - Feb Sun>=15 0:00 0 - |
922 | Rule Brazil 2015 only - Feb Sun>=22 0:00 0 - | |
21152149 | 923 | Rule Brazil 2016 2019 - Feb Sun>=15 0:00 0 - |
a3b9d54d SW |
924 | # From Steffen Thorsen (2017-12-18): |
925 | # According to many media sources, next year's DST start in Brazil will move to | |
21152149 | 926 | # the first Sunday of November |
a3b9d54d SW |
927 | # ... https://www.timeanddate.com/news/time/brazil-delays-dst-2018.html |
928 | # From Steffen Thorsen (2017-12-20): | |
929 | # http://www.planalto.gov.br/ccivil_03/_ato2015-2018/2017/decreto/D9242.htm | |
8cb73418 SW |
930 | # From Fábio Gomes (2018-10-04): |
931 | # The Brazilian president just announced a new change on this year DST. | |
932 | # It was scheduled to start on November 4th and it was changed to November 18th. | |
933 | # From Rodrigo Brüning Wessler (2018-10-15): | |
934 | # The Brazilian government just announced that the change in DST was | |
935 | # canceled.... Maybe the president Michel Temer also woke up one hour | |
936 | # earlier today. :) | |
21152149 SW |
937 | Rule Brazil 2018 only - Nov Sun>=1 0:00 1:00 - |
938 | # The last ruleset listed above says that the following states observed DST: | |
bc95ec93 | 939 | # DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP. |
21152149 SW |
940 | # |
941 | # From Steffen Thorsen (2019-04-05): | |
942 | # According to multiple sources the Brazilian president wants to get rid of DST. | |
943 | # https://gmconline.com.br/noticias/politica/bolsonaro-horario-de-verao-deve-acabar-este-ano | |
944 | # https://g1.globo.com/economia/noticia/2019/04/05/governo-anuncia-fim-do-horario-de-verao.ghtml | |
945 | # From Marcus Diniz (2019-04-25): | |
946 | # Brazil no longer has DST changes - decree signed today | |
947 | # https://g1.globo.com/politica/noticia/2019/04/25/bolsonaro-assina-decreto-que-acaba-com-o-horario-de-verao.ghtml | |
948 | # From Daniel Soares de Oliveira (2019-04-26): | |
949 | # http://www.planalto.gov.br/ccivil_03/_Ato2019-2022/2019/Decreto/D9772.htm | |
984263bc | 950 | |
21152149 | 951 | # Zone NAME STDOFF RULES FORMAT [UNTIL] |
984263bc | 952 | # |
ba5ba9da | 953 | # Fernando de Noronha (administratively part of PE) |
984263bc | 954 | Zone America/Noronha -2:09:40 - LMT 1914 |
83b0991f SW |
955 | -2:00 Brazil -02/-01 1990 Sep 17 |
956 | -2:00 - -02 1999 Sep 30 | |
957 | -2:00 Brazil -02/-01 2000 Oct 15 | |
958 | -2:00 - -02 2001 Sep 13 | |
959 | -2:00 Brazil -02/-01 2002 Oct 1 | |
960 | -2:00 - -02 | |
ba5ba9da | 961 | # Other Atlantic islands have no permanent settlement. |
48afb8ac SW |
962 | # These include Trindade and Martim Vaz (administratively part of ES), |
963 | # Rocas Atoll (RN), and the St Peter and St Paul Archipelago (PE). | |
ba5ba9da JR |
964 | # Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01; |
965 | # it also included the Penedos. | |
984263bc | 966 | # |
48afb8ac SW |
967 | # Amapá (AP), east Pará (PA) |
968 | # East Pará includes Belém, Marabá, Serra Norte, and São Félix do Xingu. | |
969 | # The division between east and west Pará is the river Xingu. | |
ba5ba9da | 970 | # In the north a very small part from the river Javary (now Jari I guess, |
48afb8ac | 971 | # the border with Amapá) to the Amazon, then to the Xingu. |
984263bc | 972 | Zone America/Belem -3:13:56 - LMT 1914 |
83b0991f SW |
973 | -3:00 Brazil -03/-02 1988 Sep 12 |
974 | -3:00 - -03 | |
984263bc | 975 | # |
48afb8ac SW |
976 | # west Pará (PA) |
977 | # West Pará includes Altamira, Óbidos, Prainha, Oriximiná, and Santarém. | |
a36b983e | 978 | Zone America/Santarem -3:38:48 - LMT 1914 |
83b0991f SW |
979 | -4:00 Brazil -04/-03 1988 Sep 12 |
980 | -4:00 - -04 2008 Jun 24 0:00 | |
981 | -3:00 - -03 | |
a36b983e | 982 | # |
48afb8ac SW |
983 | # Maranhão (MA), Piauí (PI), Ceará (CE), Rio Grande do Norte (RN), |
984 | # Paraíba (PB) | |
984263bc | 985 | Zone America/Fortaleza -2:34:00 - LMT 1914 |
83b0991f SW |
986 | -3:00 Brazil -03/-02 1990 Sep 17 |
987 | -3:00 - -03 1999 Sep 30 | |
988 | -3:00 Brazil -03/-02 2000 Oct 22 | |
989 | -3:00 - -03 2001 Sep 13 | |
990 | -3:00 Brazil -03/-02 2002 Oct 1 | |
991 | -3:00 - -03 | |
984263bc MD |
992 | # |
993 | # Pernambuco (PE) (except Atlantic islands) | |
994 | Zone America/Recife -2:19:36 - LMT 1914 | |
83b0991f SW |
995 | -3:00 Brazil -03/-02 1990 Sep 17 |
996 | -3:00 - -03 1999 Sep 30 | |
997 | -3:00 Brazil -03/-02 2000 Oct 15 | |
998 | -3:00 - -03 2001 Sep 13 | |
999 | -3:00 Brazil -03/-02 2002 Oct 1 | |
1000 | -3:00 - -03 | |
984263bc MD |
1001 | # |
1002 | # Tocantins (TO) | |
1003 | Zone America/Araguaina -3:12:48 - LMT 1914 | |
83b0991f SW |
1004 | -3:00 Brazil -03/-02 1990 Sep 17 |
1005 | -3:00 - -03 1995 Sep 14 | |
1006 | -3:00 Brazil -03/-02 2003 Sep 24 | |
1007 | -3:00 - -03 2012 Oct 21 | |
1008 | -3:00 Brazil -03/-02 2013 Sep | |
1009 | -3:00 - -03 | |
984263bc MD |
1010 | # |
1011 | # Alagoas (AL), Sergipe (SE) | |
1012 | Zone America/Maceio -2:22:52 - LMT 1914 | |
83b0991f SW |
1013 | -3:00 Brazil -03/-02 1990 Sep 17 |
1014 | -3:00 - -03 1995 Oct 13 | |
1015 | -3:00 Brazil -03/-02 1996 Sep 4 | |
1016 | -3:00 - -03 1999 Sep 30 | |
1017 | -3:00 Brazil -03/-02 2000 Oct 22 | |
1018 | -3:00 - -03 2001 Sep 13 | |
1019 | -3:00 Brazil -03/-02 2002 Oct 1 | |
1020 | -3:00 - -03 | |
984263bc | 1021 | # |
ba5ba9da JR |
1022 | # Bahia (BA) |
1023 | # There are too many Salvadors elsewhere, so use America/Bahia instead | |
1024 | # of America/Salvador. | |
1025 | Zone America/Bahia -2:34:04 - LMT 1914 | |
83b0991f SW |
1026 | -3:00 Brazil -03/-02 2003 Sep 24 |
1027 | -3:00 - -03 2011 Oct 16 | |
1028 | -3:00 Brazil -03/-02 2012 Oct 21 | |
1029 | -3:00 - -03 | |
ba5ba9da | 1030 | # |
48afb8ac SW |
1031 | # Goiás (GO), Distrito Federal (DF), Minas Gerais (MG), |
1032 | # Espírito Santo (ES), Rio de Janeiro (RJ), São Paulo (SP), Paraná (PR), | |
984263bc MD |
1033 | # Santa Catarina (SC), Rio Grande do Sul (RS) |
1034 | Zone America/Sao_Paulo -3:06:28 - LMT 1914 | |
83b0991f SW |
1035 | -3:00 Brazil -03/-02 1963 Oct 23 0:00 |
1036 | -3:00 1:00 -02 1964 | |
1037 | -3:00 Brazil -03/-02 | |
984263bc | 1038 | # |
ba5ba9da JR |
1039 | # Mato Grosso do Sul (MS) |
1040 | Zone America/Campo_Grande -3:38:28 - LMT 1914 | |
83b0991f | 1041 | -4:00 Brazil -04/-03 |
984263bc | 1042 | # |
ba5ba9da JR |
1043 | # Mato Grosso (MT) |
1044 | Zone America/Cuiaba -3:44:20 - LMT 1914 | |
83b0991f SW |
1045 | -4:00 Brazil -04/-03 2003 Sep 24 |
1046 | -4:00 - -04 2004 Oct 1 | |
1047 | -4:00 Brazil -04/-03 | |
ba5ba9da | 1048 | # |
48afb8ac | 1049 | # Rondônia (RO) |
984263bc | 1050 | Zone America/Porto_Velho -4:15:36 - LMT 1914 |
83b0991f SW |
1051 | -4:00 Brazil -04/-03 1988 Sep 12 |
1052 | -4:00 - -04 | |
984263bc MD |
1053 | # |
1054 | # Roraima (RR) | |
1055 | Zone America/Boa_Vista -4:02:40 - LMT 1914 | |
83b0991f SW |
1056 | -4:00 Brazil -04/-03 1988 Sep 12 |
1057 | -4:00 - -04 1999 Sep 30 | |
1058 | -4:00 Brazil -04/-03 2000 Oct 15 | |
1059 | -4:00 - -04 | |
984263bc | 1060 | # |
48afb8ac | 1061 | # east Amazonas (AM): Boca do Acre, Jutaí, Manaus, Floriano Peixoto |
ba5ba9da JR |
1062 | # The great circle line from Tabatinga to Porto Acre divides |
1063 | # east from west Amazonas. | |
984263bc | 1064 | Zone America/Manaus -4:00:04 - LMT 1914 |
83b0991f SW |
1065 | -4:00 Brazil -04/-03 1988 Sep 12 |
1066 | -4:00 - -04 1993 Sep 28 | |
1067 | -4:00 Brazil -04/-03 1994 Sep 22 | |
1068 | -4:00 - -04 | |
984263bc MD |
1069 | # |
1070 | # west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant, | |
48afb8ac | 1071 | # Eirunepé, Envira, Ipixuna |
984263bc | 1072 | Zone America/Eirunepe -4:39:28 - LMT 1914 |
83b0991f SW |
1073 | -5:00 Brazil -05/-04 1988 Sep 12 |
1074 | -5:00 - -05 1993 Sep 28 | |
1075 | -5:00 Brazil -05/-04 1994 Sep 22 | |
1076 | -5:00 - -05 2008 Jun 24 0:00 | |
1077 | -4:00 - -04 2013 Nov 10 | |
1078 | -5:00 - -05 | |
984263bc MD |
1079 | # |
1080 | # Acre (AC) | |
1081 | Zone America/Rio_Branco -4:31:12 - LMT 1914 | |
83b0991f SW |
1082 | -5:00 Brazil -05/-04 1988 Sep 12 |
1083 | -5:00 - -05 2008 Jun 24 0:00 | |
1084 | -4:00 - -04 2013 Nov 10 | |
1085 | -5:00 - -05 | |
984263bc MD |
1086 | |
1087 | # Chile | |
1088 | ||
63f64d79 | 1089 | # From Paul Eggert (2022-03-15): |
fced0463 | 1090 | # Shanks & Pottenger says America/Santiago introduced standard time in |
a3b9d54d | 1091 | # 1890 and rounds its UT offset to 70W40; guess that in practice this |
fced0463 SW |
1092 | # was the same offset as in 1916-1919. It also says Pacific/Easter |
1093 | # standardized on 109W22 in 1890; assume this didn't change the clocks. | |
1094 | # | |
1095 | # Dates for America/Santiago from 1910 to 2004 are primarily from | |
1096 | # the following source, cited by Oscar van Vlijmen (2006-10-08): | |
1097 | # [1] Chile Law | |
1098 | # http://www.webexhibits.org/daylightsaving/chile.html | |
e4ac9488 | 1099 | # This contains a copy of this official table: |
fced0463 | 1100 | # Cambios en la hora oficial de Chile desde 1900 (retrieved 2008-03-30) |
e4ac9488 | 1101 | # https://web.archive.org/web/20080330200901/http://www.horaoficial.cl/cambio.htm |
fced0463 SW |
1102 | # [1] needs several corrections, though. |
1103 | # | |
1104 | # The first set of corrections is from: | |
1105 | # [2] History of the Official Time of Chile | |
1106 | # http://www.horaoficial.cl/ing/horaof_ing.html (retrieved 2012-03-06). See: | |
e4ac9488 | 1107 | # https://web.archive.org/web/20120306042032/http://www.horaoficial.cl/ing/horaof_ing.html |
fced0463 SW |
1108 | # This is an English translation of: |
1109 | # Historia de la hora oficial de Chile (retrieved 2012-10-24). See: | |
e4ac9488 | 1110 | # https://web.archive.org/web/20121024234627/http://www.horaoficial.cl/horaof.htm |
fced0463 | 1111 | # A fancier Spanish version (requiring mouse-clicking) is at: |
63f64d79 | 1112 | # http://www.horaoficial.cl/historia_hora.php |
fced0463 SW |
1113 | # Conflicts between [1] and [2] were resolved as follows: |
1114 | # | |
1115 | # - [1] says the 1910 transition was Jan 1, [2] says Jan 10 and cites | |
32e0bed6 | 1116 | # Boletín No. 1, Aviso No. 1 (1910). Go with [2]. |
fced0463 SW |
1117 | # |
1118 | # - [1] says SMT was -4:42:45, [2] says Chile's official time from | |
1119 | # 1916 to 1919 was -4:42:46.3, the meridian of Chile's National | |
1120 | # Astronomical Observatory (OAN), then located in what is now | |
63f64d79 SW |
1121 | # Quinta Normal in Santiago. Go with [1], as this matches the meridian |
1122 | # referred to by the relevant Chilean laws to this day. | |
fced0463 SW |
1123 | # |
1124 | # - [1] says the 1918 transition was Sep 1, [2] says Sep 10 and cites | |
32e0bed6 | 1125 | # Boletín No. 22, Aviso No. 129/1918 (1918-08-23). Go with [2]. |
fced0463 SW |
1126 | # |
1127 | # - [1] does not give times for transitions; assume they occur | |
1128 | # at midnight mainland time, the current common practice. However, | |
1129 | # go with [2]'s specification of 23:00 for the 1947-05-21 transition. | |
1130 | # | |
1131 | # Another correction to [1] is from Jesper Nørgaard Welen, who | |
1132 | # wrote (2006-10-08), "I think that there are some obvious mistakes in | |
1133 | # the suggested link from Oscar van Vlijmen,... for instance entry 66 | |
1134 | # says that GMT-4 ended 1990-09-12 while entry 67 only begins GMT-3 at | |
1135 | # 1990-09-15 (they should have been 1990-09-15 and 1990-09-16 | |
1136 | # respectively), but anyhow it clears up some doubts too." | |
1137 | # | |
1138 | # Data for Pacific/Easter from 1910 through 1967 come from Shanks & | |
1139 | # Pottenger. After that, for lack of better info assume | |
1140 | # Pacific/Easter is always two hours behind America/Santiago; | |
1141 | # this is known to work for DST transitions starting in 2008 and | |
1142 | # may well be true for earlier transitions. | |
1143 | ||
63f64d79 SW |
1144 | # From Tim Parenti (2022-03-15): |
1145 | # For a brief period of roughly six weeks in 1946, DST was only observed on an | |
1146 | # emergency basis in specific regions of central Chile; namely, "the national | |
1147 | # territory between the provinces of Coquimbo and Concepción, inclusive". | |
1148 | # This was enacted by Decree 3,891, dated 1946-07-13, and took effect | |
1149 | # 1946-07-14 24:00, advancing these central regions to -03. | |
1150 | # https://www.diariooficial.interior.gob.cl/versiones-anteriores/do-h/19460715/#page/1 | |
1151 | # The decree contemplated "[t]hat this advancement of the Official Time, even | |
1152 | # though it has been proposed for the cities of Santiago and Valparaíso only, | |
1153 | # must be agreed with that of other cities, due to the connection of various | |
1154 | # activities that require it, such as, for example, the operation of rail | |
1155 | # services". It was originally set to expire after 30 days but was extended | |
1156 | # through 1946-08-31 by Decree 4,506, dated 1946-08-13. | |
1157 | # https://www.diariooficial.interior.gob.cl/versiones-anteriores/do-h/19460814/#page/1 | |
1158 | # | |
1159 | # Law Number 8,522, promulgated 1946-08-27, reunified Chilean clocks at their | |
1160 | # new "Summer Time" of -04, reckoned as that of "the meridian of the | |
1161 | # Astronomical Observatory of Lo Espejo, advanced by 42 minutes and 45 | |
1162 | # seconds". | |
1163 | # https://www.diariooficial.interior.gob.cl/versiones-anteriores/do-h/19460828/#page/1 | |
1164 | # After a brief "Winter Time" stint at -05 beginning 1947-04-01, Law Number | |
1165 | # 8,777, promulgated 1947-05-17, established year-round -04 "from 23:00 on the | |
1166 | # second day after it is published in the 'Diario Oficial'." It was published | |
1167 | # on Monday 1947-05-19 and so took effect from Wednesday 1947-05-21 23:00. | |
1168 | # https://www.diariooficial.interior.gob.cl/versiones-anteriores/do-h/19470519/#page/1 | |
1169 | ||
984263bc MD |
1170 | # From Eduardo Krell (1995-10-19): |
1171 | # The law says to switch to DST at midnight [24:00] on the second SATURDAY | |
1172 | # of October.... The law is the same for March and October. | |
1173 | # (1998-09-29): | |
1174 | # Because of the drought this year, the government decided to go into | |
1175 | # DST earlier (saturday 9/26 at 24:00). This is a one-time change only ... | |
1176 | # (unless there's another dry season next year, I guess). | |
1177 | ||
1178 | # From Julio I. Pacheco Troncoso (1999-03-18): | |
1179 | # Because of the same drought, the government decided to end DST later, | |
1180 | # on April 3, (one-time change). | |
1181 | ||
48afb8ac | 1182 | # From Germán Poo-Caamaño (2008-03-03): |
a6282357 SW |
1183 | # Due to drought, Chile extends Daylight Time in three weeks. This |
1184 | # is one-time change (Saturday 3/29 at 24:00 for America/Santiago | |
1185 | # and Saturday 3/29 at 22:00 for Pacific/Easter) | |
63562808 | 1186 | # The Supreme Decree is located at |
a6282357 | 1187 | # http://www.shoa.cl/servicios/supremo316.pdf |
fced0463 | 1188 | # |
48afb8ac | 1189 | # From José Miguel Garrido (2008-03-05): |
a6282357 | 1190 | # http://www.shoa.cl/noticias/2008/04hora/hora.htm |
a6282357 | 1191 | |
5a0c5ddc SW |
1192 | # From Angel Chiang (2010-03-04): |
1193 | # Subject: DST in Chile exceptionally extended to 3 April due to earthquake | |
5a0c5ddc | 1194 | # http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098 |
5a0c5ddc | 1195 | # |
48afb8ac | 1196 | # From Arthur David Olson (2010-03-06): |
5a0c5ddc SW |
1197 | # Angel Chiang's message confirmed by Julio Pacheco; Julio provided a patch. |
1198 | ||
f891a7e1 | 1199 | # From Glenn Eychaner (2011-03-28): |
f891a7e1 | 1200 | # http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E} |
f891a7e1 SW |
1201 | # In English: |
1202 | # Chile's clocks will go back an hour this year on the 7th of May instead | |
1203 | # of this Saturday. They will go forward again the 3rd Saturday in | |
fced0463 | 1204 | # August, not in October as they have since 1968. |
f891a7e1 | 1205 | |
bca44125 SW |
1206 | # From Mauricio Parada (2012-02-22), translated by Glenn Eychaner (2012-02-23): |
1207 | # As stated in the website of the Chilean Energy Ministry | |
1208 | # http://www.minenergia.cl/ministerio/noticias/generales/gobierno-anuncia-fechas-de-cambio-de.html | |
1209 | # The Chilean Government has decided to postpone the entrance into winter time | |
fced0463 | 1210 | # (to leave DST) from March 11 2012 to April 28th 2012.... |
bca44125 SW |
1211 | # Quote from the website communication: |
1212 | # | |
1213 | # 6. For the year 2012, the dates of entry into winter time will be as follows: | |
1214 | # a. Saturday April 28, 2012, clocks should go back 60 minutes; that is, at | |
1215 | # 23:59:59, instead of passing to 0:00, the time should be adjusted to be 23:00 | |
1216 | # of the same day. | |
1217 | # b. Saturday, September 1, 2012, clocks should go forward 60 minutes; that is, | |
1218 | # at 23:59:59, instead of passing to 0:00, the time should be adjusted to be | |
1219 | # 01:00 on September 2. | |
80e7e01d SW |
1220 | |
1221 | # From Steffen Thorsen (2013-02-15): | |
1222 | # According to several news sources, Chile has extended DST this year, | |
1223 | # they will end DST later and start DST earlier than planned. They | |
1224 | # hope to save energy. The new end date is 2013-04-28 00:00 and new | |
1225 | # start date is 2013-09-08 00:00.... | |
1226 | # http://www.gob.cl/informa/2013/02/15/gobierno-anuncia-fechas-de-cambio-de-hora-para-el-ano-2013.htm | |
bca44125 | 1227 | |
48afb8ac | 1228 | # From José Miguel Garrido (2014-02-19): |
39560a18 SW |
1229 | # Today appeared in the Diario Oficial a decree amending the time change |
1230 | # dates to 2014. | |
1231 | # DST End: last Saturday of April 2014 (Sun 27 Apr 2014 03:00 UTC) | |
1232 | # DST Start: first Saturday of September 2014 (Sun 07 Sep 2014 04:00 UTC) | |
1233 | # http://www.diariooficial.interior.gob.cl//media/2014/02/19/do-20140219.pdf | |
1234 | ||
8a3cab99 SW |
1235 | # From Eduardo Romero Urra (2015-03-03): |
1236 | # Today has been published officially that Chile will use the DST time | |
1237 | # permanently until March 25 of 2017 | |
1238 | # http://www.diariooficial.interior.gob.cl/media/2015/03/03/1-large.jpg | |
1239 | # | |
1240 | # From Paul Eggert (2015-03-03): | |
1241 | # For now, assume that the extension will persist indefinitely. | |
30d1d955 | 1242 | |
88ab7310 SW |
1243 | # From Juan Correa (2016-03-18): |
1244 | # The decree regarding DST has been published in today's Official Gazette: | |
1245 | # http://www.diariooficial.interior.gob.cl/versiones-anteriores/do/20160318/ | |
1246 | # http://www.leychile.cl/Navegar?idNorma=1088502 | |
1247 | # It does consider the second Saturday of May and August as the dates | |
1248 | # for the transition; and it lists DST dates until 2019, but I think | |
1249 | # this scheme will stick. | |
1250 | # | |
1251 | # From Paul Eggert (2016-03-18): | |
1252 | # For now, assume the pattern holds for the indefinite future. | |
1253 | # The decree says transitions occur at 24:00; in practice this appears | |
1254 | # to mean 24:00 mainland time, not 24:00 local time, so that Easter | |
1255 | # Island is always two hours behind the mainland. | |
1256 | ||
83b0991f SW |
1257 | # From Juan Correa (2016-12-04): |
1258 | # Magallanes region ... will keep DST (UTC -3) all year round.... | |
1259 | # http://www.soychile.cl/Santiago/Sociedad/2016/12/04/433428/Bachelet-firmo-el-decreto-para-establecer-un-horario-unico-para-la-Region-de-Magallanes.aspx | |
83b0991f SW |
1260 | # From Deborah Goldsmith (2017-01-19): |
1261 | # http://www.diariooficial.interior.gob.cl/publicaciones/2017/01/17/41660/01/1169626.pdf | |
83b0991f | 1262 | |
8cb73418 SW |
1263 | # From Juan Correa (2018-08-13): |
1264 | # As of moments ago, the Ministry of Energy in Chile has announced the new | |
1265 | # schema for DST. ... Announcement in video (in Spanish): | |
1266 | # https://twitter.com/MinEnergia/status/1029000399129374720 | |
1267 | # From Yonathan Dossow (2018-08-13): | |
1268 | # The video says "first Saturday of September", we all know it means Sunday at | |
1269 | # midnight. | |
1270 | # From Tim Parenti (2018-08-13): | |
1271 | # Translating the captions on the video at 0:44-0:55, "We want to announce as | |
1272 | # Government that from 2019, Winter Time will be increased to 5 months, between | |
1273 | # the first Saturday of April and the first Saturday of September." | |
1274 | # At 2:08-2:20, "The Magallanes region will maintain its current time, as | |
1275 | # decided by the citizens during 2017, but our Government will promote a | |
1276 | # regional dialogue table to gather their opinion on this matter." | |
1277 | # https://twitter.com/MinEnergia/status/1029009354001973248 | |
1278 | # "We will keep the new time policy unchanged for at least the next 4 years." | |
1279 | # So we extend the new rules on Saturdays at 24:00 mainland time indefinitely. | |
21152149 SW |
1280 | # From Juan Correa (2019-02-04): |
1281 | # http://www.diariooficial.interior.gob.cl/publicaciones/2018/11/23/42212/01/1498738.pdf | |
9948f63c SW |
1282 | # From Paul Eggert (2019-09-01): |
1283 | # The above says the Magallanes exception expires 2022-04-02 at 24:00, | |
1284 | # so in theory, they will revert to -04/-03 after that. | |
1285 | # For now, assume that they will not revert, | |
1286 | # since they have extended the expiration date once already. | |
8cb73418 | 1287 | |
b858e488 | 1288 | # Rule NAME FROM TO - IN ON AT SAVE LETTER/S |
574756e4 | 1289 | Rule Chile 1927 1931 - Sep 1 0:00 1:00 - |
984263bc | 1290 | Rule Chile 1928 1932 - Apr 1 0:00 0 - |
574756e4 | 1291 | Rule Chile 1968 only - Nov 3 4:00u 1:00 - |
ff8424c5 | 1292 | Rule Chile 1969 only - Mar 30 3:00u 0 - |
574756e4 | 1293 | Rule Chile 1969 only - Nov 23 4:00u 1:00 - |
ff8424c5 SW |
1294 | Rule Chile 1970 only - Mar 29 3:00u 0 - |
1295 | Rule Chile 1971 only - Mar 14 3:00u 0 - | |
574756e4 | 1296 | Rule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 - |
ff8424c5 | 1297 | Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 - |
574756e4 SW |
1298 | Rule Chile 1973 only - Sep 30 4:00u 1:00 - |
1299 | Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 - | |
ff8424c5 | 1300 | Rule Chile 1987 only - Apr 12 3:00u 0 - |
fced0463 | 1301 | Rule Chile 1988 1990 - Mar Sun>=9 3:00u 0 - |
574756e4 SW |
1302 | Rule Chile 1988 1989 - Oct Sun>=9 4:00u 1:00 - |
1303 | Rule Chile 1990 only - Sep 16 4:00u 1:00 - | |
ff8424c5 | 1304 | Rule Chile 1991 1996 - Mar Sun>=9 3:00u 0 - |
574756e4 | 1305 | Rule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 - |
ff8424c5 SW |
1306 | Rule Chile 1997 only - Mar 30 3:00u 0 - |
1307 | Rule Chile 1998 only - Mar Sun>=9 3:00u 0 - | |
574756e4 | 1308 | Rule Chile 1998 only - Sep 27 4:00u 1:00 - |
984263bc | 1309 | Rule Chile 1999 only - Apr 4 3:00u 0 - |
574756e4 | 1310 | Rule Chile 1999 2010 - Oct Sun>=9 4:00u 1:00 - |
a6282357 SW |
1311 | Rule Chile 2000 2007 - Mar Sun>=9 3:00u 0 - |
1312 | # N.B.: the end of March 29 in Chile is March 30 in Universal time, | |
1313 | # which is used below in specifying the transition. | |
1314 | Rule Chile 2008 only - Mar 30 3:00u 0 - | |
5a0c5ddc | 1315 | Rule Chile 2009 only - Mar Sun>=9 3:00u 0 - |
f891a7e1 SW |
1316 | Rule Chile 2010 only - Apr Sun>=1 3:00u 0 - |
1317 | Rule Chile 2011 only - May Sun>=2 3:00u 0 - | |
574756e4 | 1318 | Rule Chile 2011 only - Aug Sun>=16 4:00u 1:00 - |
88ab7310 | 1319 | Rule Chile 2012 2014 - Apr Sun>=23 3:00u 0 - |
574756e4 | 1320 | Rule Chile 2012 2014 - Sep Sun>=2 4:00u 1:00 - |
8cb73418 SW |
1321 | Rule Chile 2016 2018 - May Sun>=9 3:00u 0 - |
1322 | Rule Chile 2016 2018 - Aug Sun>=9 4:00u 1:00 - | |
1323 | Rule Chile 2019 max - Apr Sun>=2 3:00u 0 - | |
1324 | Rule Chile 2019 max - Sep Sun>=2 4:00u 1:00 - | |
ff8424c5 | 1325 | # IATA SSIM anomalies: (1992-02) says 1992-03-14; |
984263bc | 1326 | # (1996-09) says 1998-03-08. Ignore these. |
21152149 | 1327 | # Zone NAME STDOFF RULES FORMAT [UNTIL] |
63f64d79 SW |
1328 | Zone America/Santiago -4:42:45 - LMT 1890 |
1329 | -4:42:45 - SMT 1910 Jan 10 # Santiago Mean Time | |
83b0991f | 1330 | -5:00 - -05 1916 Jul 1 |
63f64d79 | 1331 | -4:42:45 - SMT 1918 Sep 10 |
83b0991f | 1332 | -4:00 - -04 1919 Jul 1 |
63f64d79 | 1333 | -4:42:45 - SMT 1927 Sep 1 |
83b0991f SW |
1334 | -5:00 Chile -05/-04 1932 Sep 1 |
1335 | -4:00 - -04 1942 Jun 1 | |
1336 | -5:00 - -05 1942 Aug 1 | |
1337 | -4:00 - -04 1946 Jul 15 | |
1338 | -4:00 1:00 -03 1946 Sep 1 # central Chile | |
1339 | -4:00 - -04 1947 Apr 1 | |
1340 | -5:00 - -05 1947 May 21 23:00 | |
1341 | -4:00 Chile -04/-03 | |
1342 | Zone America/Punta_Arenas -4:43:40 - LMT 1890 | |
63f64d79 | 1343 | -4:42:45 - SMT 1910 Jan 10 |
83b0991f | 1344 | -5:00 - -05 1916 Jul 1 |
63f64d79 | 1345 | -4:42:45 - SMT 1918 Sep 10 |
83b0991f | 1346 | -4:00 - -04 1919 Jul 1 |
63f64d79 | 1347 | -4:42:45 - SMT 1927 Sep 1 |
83b0991f SW |
1348 | -5:00 Chile -05/-04 1932 Sep 1 |
1349 | -4:00 - -04 1942 Jun 1 | |
1350 | -5:00 - -05 1942 Aug 1 | |
1351 | -4:00 - -04 1947 Apr 1 | |
1352 | -5:00 - -05 1947 May 21 23:00 | |
1353 | -4:00 Chile -04/-03 2016 Dec 4 | |
1354 | -3:00 - -03 | |
fced0463 | 1355 | Zone Pacific/Easter -7:17:28 - LMT 1890 |
70fc4940 | 1356 | -7:17:28 - EMT 1932 Sep # Easter Mean Time |
83b0991f SW |
1357 | -7:00 Chile -07/-06 1982 Mar 14 3:00u # Easter Time |
1358 | -6:00 Chile -06/-05 | |
984263bc | 1359 | # |
48afb8ac SW |
1360 | # Salas y Gómez Island is uninhabited. |
1361 | # Other Chilean locations, including Juan Fernández Is, Desventuradas Is, | |
1362 | # and Antarctic bases, are like America/Santiago. | |
984263bc | 1363 | |
fced0463 SW |
1364 | # Antarctic base using South American rules |
1365 | # (See the file 'antarctica' for more.) | |
1366 | # | |
1367 | # Palmer, Anvers Island, since 1965 (moved 2 miles in 1968) | |
1368 | # | |
1369 | # From Ethan Dicks (1996-10-06): | |
1370 | # It keeps the same time as Punta Arenas, Chile, because, just like us | |
1371 | # and the South Pole, that's the other end of their supply line.... | |
1372 | # I verified with someone who was there that since 1980, | |
1373 | # Palmer has followed Chile. Prior to that, before the Falklands War, | |
1374 | # Palmer used to be supplied from Argentina. | |
1375 | # | |
21152149 | 1376 | # Zone NAME STDOFF RULES FORMAT [UNTIL] |
a1b6a6c6 | 1377 | Zone Antarctica/Palmer 0 - -00 1965 |
83b0991f SW |
1378 | -4:00 Arg -04/-03 1969 Oct 5 |
1379 | -3:00 Arg -03/-02 1982 May | |
1380 | -4:00 Chile -04/-03 2016 Dec 4 | |
1381 | -3:00 - -03 | |
fced0463 | 1382 | |
984263bc | 1383 | # Colombia |
80e7e01d | 1384 | |
48afb8ac | 1385 | # Milne gives 4:56:16.4 for Bogotá time in 1899; round to nearest. He writes, |
80e7e01d SW |
1386 | # "A variation of fifteen minutes in the public clocks of Bogota is not rare." |
1387 | ||
b858e488 | 1388 | # Rule NAME FROM TO - IN ON AT SAVE LETTER/S |
574756e4 | 1389 | Rule CO 1992 only - May 3 0:00 1:00 - |
bd7414aa | 1390 | Rule CO 1993 only - Apr 4 0:00 0 - |
21152149 | 1391 | # Zone NAME STDOFF RULES FORMAT [UNTIL] |
80e7e01d | 1392 | Zone America/Bogota -4:56:16 - LMT 1884 Mar 13 |
48afb8ac | 1393 | -4:56:16 - BMT 1914 Nov 23 # Bogotá Mean Time |
83b0991f | 1394 | -5:00 CO -05/-04 |
984263bc MD |
1395 | # Malpelo, Providencia, San Andres |
1396 | # no information; probably like America/Bogota | |
1397 | ||
48afb8ac | 1398 | # Curaçao |
65adea1d | 1399 | # See America/Puerto_Rico. |
8393cd87 | 1400 | # |
ffa9a577 | 1401 | # From Arthur David Olson (2011-06-15): |
d1bcb6be | 1402 | # use links for places with new iso3166 codes. |
48afb8ac | 1403 | # The name "Lower Prince's Quarter" is both longer than fourteen characters |
65adea1d SW |
1404 | # and contains an apostrophe; use "Lower_Princes".... |
1405 | # From Paul Eggert (2021-09-29): | |
1406 | # These backward-compatibility links now are in the 'northamerica' file. | |
ffa9a577 | 1407 | |
984263bc | 1408 | # Ecuador |
8393cd87 | 1409 | # |
48afb8ac | 1410 | # Milne says the Central and South American Telegraph Company used -5:24:15. |
80e7e01d | 1411 | # |
83b0991f | 1412 | # From Alois Treindl (2016-12-15): |
e4ac9488 | 1413 | # https://www.elcomercio.com/actualidad/hora-sixto-1993.html |
83b0991f SW |
1414 | # ... Whether the law applied also to Galápagos, I do not know. |
1415 | # From Paul Eggert (2016-12-15): | |
e4ac9488 | 1416 | # https://www.elcomercio.com/afull/modificacion-husohorario-ecuador-presidentes-decreto.html |
83b0991f SW |
1417 | # This says President Sixto Durán Ballén signed decree No. 285, which |
1418 | # established DST from 1992-11-28 to 1993-02-05; it does not give transition | |
1419 | # times. The people called it "hora de Sixto" ("Sixto hour"). The change did | |
1420 | # not go over well; a popular song "Qué hora es" by Jaime Guevara had lyrics | |
1421 | # that included "Amanecía en mitad de la noche, los guaguas iban a clase sin | |
1422 | # sol" ("It was dawning in the middle of the night, the buses went to class | |
1423 | # without sun"). Although Ballén's campaign slogan was "Ni un paso atrás" | |
1424 | # (Not one step back), the clocks went back in 1993 and the experiment was not | |
1425 | # repeated. For now, assume transitions were at 00:00 local time country-wide. | |
1426 | # | |
b858e488 | 1427 | # Rule NAME FROM TO - IN ON AT SAVE LETTER/S |
574756e4 | 1428 | Rule Ecuador 1992 only - Nov 28 0:00 1:00 - |
83b0991f | 1429 | Rule Ecuador 1993 only - Feb 5 0:00 0 - |
8393cd87 | 1430 | # |
21152149 | 1431 | # Zone NAME STDOFF RULES FORMAT [UNTIL] |
984263bc MD |
1432 | Zone America/Guayaquil -5:19:20 - LMT 1890 |
1433 | -5:14:00 - QMT 1931 # Quito Mean Time | |
83b0991f | 1434 | -5:00 Ecuador -05/-04 |
984263bc | 1435 | Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno |
83b0991f SW |
1436 | -5:00 - -05 1986 |
1437 | -6:00 Ecuador -06/-05 | |
984263bc MD |
1438 | |
1439 | # Falklands | |
1440 | ||
bd7414aa SW |
1441 | # From Paul Eggert (2006-03-22): |
1442 | # Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except | |
1443 | # the IATA gives 1996-09-08. Go with Shanks & Pottenger. | |
984263bc MD |
1444 | |
1445 | # From Falkland Islands Government Office, London (2001-01-22) | |
48afb8ac | 1446 | # via Jesper Nørgaard: |
984263bc MD |
1447 | # ... the clocks revert back to Local Mean Time at 2 am on Sunday 15 |
1448 | # April 2001 and advance one hour to summer time at 2 am on Sunday 2 | |
1449 | # September. It is anticipated that the clocks will revert back at 2 | |
1450 | # am on Sunday 21 April 2002 and advance to summer time at 2 am on | |
1451 | # Sunday 1 September. | |
1452 | ||
1453 | # From Rives McDow (2001-02-13): | |
1454 | # | |
1455 | # I have communicated several times with people there, and the last | |
1456 | # time I had communications that was helpful was in 1998. Here is | |
1457 | # what was said then: | |
1458 | # | |
1459 | # "The general rule was that Stanley used daylight saving and the Camp | |
1460 | # did not. However for various reasons many people in the Camp have | |
1461 | # started to use daylight saving (known locally as 'Stanley Time') | |
1462 | # There is no rule as to who uses daylight saving - it is a matter of | |
1463 | # personal choice and so it is impossible to draw a map showing who | |
1464 | # uses it and who does not. Any list would be out of date as soon as | |
1465 | # it was produced. This year daylight saving ended on April 18/19th | |
1466 | # and started again on September 12/13th. I do not know what the rule | |
1467 | # is, but can find out if you like. We do not change at the same time | |
1468 | # as UK or Chile." | |
1469 | # | |
1470 | # I did have in my notes that the rule was "Second Saturday in Sep at | |
1471 | # 0:00 until third Saturday in Apr at 0:00". I think that this does | |
1472 | # not agree in some cases with Shanks; is this true? | |
1473 | # | |
1474 | # Also, there is no mention in the list that some areas in the | |
1475 | # Falklands do not use DST. I have found in my communications there | |
1476 | # that these areas are on the western half of East Falkland and all of | |
1477 | # West Falkland. Stanley is the only place that consistently observes | |
1478 | # DST. Again, as in other places in the world, the farmers don't like | |
1479 | # it. West Falkland is almost entirely sheep farmers. | |
1480 | # | |
1481 | # I know one lady there that keeps a list of which farm keeps DST and | |
1482 | # which doesn't each year. She runs a shop in Stanley, and says that | |
1483 | # the list changes each year. She uses it to communicate to her | |
1484 | # customers, catching them when they are home for lunch or dinner. | |
1485 | ||
1486 | # From Paul Eggert (2001-03-05): | |
1487 | # For now, we'll just record the time in Stanley, since we have no | |
1488 | # better info. | |
1489 | ||
e01e21dd SW |
1490 | # From Steffen Thorsen (2011-04-01): |
1491 | # The Falkland Islands will not turn back clocks this winter, but stay on | |
1492 | # daylight saving time. | |
1493 | # | |
1494 | # One source: | |
e01e21dd | 1495 | # http://www.falklandnews.com/public/story.cfm?get=5914&source=3 |
e01e21dd SW |
1496 | # |
1497 | # We have gotten this confirmed by a clerk of the legislative assembly: | |
1498 | # Normally the clocks revert to Local Mean Time (UTC/GMT -4 hours) on the | |
1499 | # third Sunday of April at 0200hrs and advance to Summer Time (UTC/GMT -3 | |
1500 | # hours) on the first Sunday of September at 0200hrs. | |
1501 | # | |
1502 | # IMPORTANT NOTE: During 2011, on a trial basis, the Falkland Islands | |
1503 | # will not revert to local mean time, but clocks will remain on Summer | |
1504 | # time (UTC/GMT - 3 hours) throughout the whole of 2011. Any long term | |
1505 | # change to local time following the trial period will be notified. | |
bca44125 SW |
1506 | # |
1507 | # From Andrew Newman (2012-02-24) | |
1508 | # A letter from Justin McPhee, Chief Executive, | |
1509 | # Cable & Wireless Falkland Islands (dated 2012-02-22) | |
1510 | # states... | |
1511 | # The current Atlantic/Stanley entry under South America expects the | |
1512 | # clocks to go back to standard Falklands Time (FKT) on the 15th April. | |
1513 | # The database entry states that in 2011 Stanley was staying on fixed | |
1514 | # summer time on a trial basis only. FIG need to contact IANA and/or | |
1515 | # the maintainers of the database to inform them we're adopting | |
1516 | # the same policy this year and suggest recommendations for future years. | |
1517 | # | |
574756e4 | 1518 | # For now we will assume permanent -03 for the Falklands |
bca44125 SW |
1519 | # until advised differently (to apply for 2012 and beyond, after the 2011 |
1520 | # experiment was apparently successful.) | |
b858e488 | 1521 | # Rule NAME FROM TO - IN ON AT SAVE LETTER/S |
574756e4 | 1522 | Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 - |
984263bc | 1523 | Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 - |
574756e4 SW |
1524 | Rule Falk 1939 only - Oct 1 0:00 1:00 - |
1525 | Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 - | |
984263bc | 1526 | Rule Falk 1943 only - Jan 1 0:00 0 - |
574756e4 | 1527 | Rule Falk 1983 only - Sep lastSun 0:00 1:00 - |
984263bc | 1528 | Rule Falk 1984 1985 - Apr lastSun 0:00 0 - |
574756e4 SW |
1529 | Rule Falk 1984 only - Sep 16 0:00 1:00 - |
1530 | Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 - | |
984263bc | 1531 | Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 - |
e01e21dd | 1532 | Rule Falk 2001 2010 - Apr Sun>=15 2:00 0 - |
574756e4 | 1533 | Rule Falk 2001 2010 - Sep Sun>=1 2:00 1:00 - |
21152149 | 1534 | # Zone NAME STDOFF RULES FORMAT [UNTIL] |
984263bc | 1535 | Zone Atlantic/Stanley -3:51:24 - LMT 1890 |
48afb8ac | 1536 | -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time |
83b0991f SW |
1537 | -4:00 Falk -04/-03 1983 May |
1538 | -3:00 Falk -03/-02 1985 Sep 15 | |
1539 | -4:00 Falk -04/-03 2010 Sep 5 2:00 | |
1540 | -3:00 - -03 | |
984263bc MD |
1541 | |
1542 | # French Guiana | |
21152149 | 1543 | # Zone NAME STDOFF RULES FORMAT [UNTIL] |
984263bc | 1544 | Zone America/Cayenne -3:29:20 - LMT 1911 Jul |
83b0991f SW |
1545 | -4:00 - -04 1967 Oct |
1546 | -3:00 - -03 | |
984263bc MD |
1547 | |
1548 | # Guyana | |
65adea1d SW |
1549 | |
1550 | # From P Chan (2020-11-27): | |
1551 | # https://books.google.com/books?id=5-5CAQAAMAAJ&pg=SA1-PA547 | |
1552 | # The Official Gazette of British Guiana. (New Series.) Vol. XL. July to | |
1553 | # December, 1915, p 1547, lists as several notes: | |
1554 | # "Local Mean Time 3 hours 52 mins. 39 secs. slow of Greenwich Mean Time | |
1555 | # (Georgetown.) From 1st August, 1911, British Guiana Standard Mean Time 4 | |
1556 | # hours slow of Greenwich Mean Time, by notice in Official Gazette on 1st July, | |
1557 | # 1911. From 1st March, 1915, British Guiana Standard Mean Time 3 hours 45 | |
1558 | # mins. 0 secs. slow of Greenwich Mean Time, by notice in Official Gazette on | |
1559 | # 23rd January, 1915." | |
1560 | # | |
1561 | # https://parliament.gov.gy/documents/acts/10923-act_no._27_of_1975_-_interpretation_and_general_clauses_(amendment)_act_1975.pdf | |
1562 | # Interpretation and general clauses (Amendment) Act 1975 (Act No. 27 of 1975) | |
1563 | # [dated 1975-07-31] | |
1564 | # "This Act...shall come into operation on 1st August, 1975." | |
1565 | # "...where any expression of time occurs...the time referred to shall signify | |
1566 | # the standard time of Guyana which shall be three hours behind Greenwich Mean | |
1567 | # Time." | |
1568 | # | |
1569 | # Circular No. 10/1992 dated 1992-03-20 | |
1570 | # https://dps.gov.gy/wp-content/uploads/2018/12/1992-03-20-Circular-010.pdf | |
1571 | # "...cabinet has decided that with effect from Sunday 29th March, 1992, Guyana | |
1572 | # Standard Time would be re-established at 01:00 hours by adjusting the hands | |
1573 | # of the clock back to 24:00 hours." | |
1574 | # Legislated in the Interpretation and general clauses (Amendment) Act 1992 | |
1575 | # (Act No. 6 of 1992) [passed 1992-03-27, published 1992-04-18] | |
1576 | # https://parliament.gov.gy/documents/acts/5885-6_of_1992_interpretation_and_general_clauses_(amendment)_act_1992.pdf | |
1577 | ||
21152149 | 1578 | # Zone NAME STDOFF RULES FORMAT [UNTIL] |
65adea1d SW |
1579 | Zone America/Guyana -3:52:39 - LMT 1911 Aug 1 # Georgetown |
1580 | -4:00 - -04 1915 Mar 1 | |
1581 | -3:45 - -0345 1975 Aug 1 | |
1582 | -3:00 - -03 1992 Mar 29 1:00 | |
83b0991f | 1583 | -4:00 - -04 |
984263bc MD |
1584 | |
1585 | # Paraguay | |
d1bcb6be | 1586 | # |
bd7414aa | 1587 | # From Paul Eggert (2006-03-22): |
48afb8ac SW |
1588 | # Shanks & Pottenger say that spring transitions are 01:00 -> 02:00, |
1589 | # and autumn transitions are 00:00 -> 23:00. Go with pre-1999 | |
984263bc | 1590 | # editions of Shanks, and with the IATA, who say transitions occur at 00:00. |
d1bcb6be SW |
1591 | # |
1592 | # From Waldemar Villamayor-Venialbo (2013-09-20): | |
1593 | # No time of the day is established for the adjustment, so people normally | |
1594 | # adjust their clocks at 0 hour of the given dates. | |
1595 | # | |
b858e488 | 1596 | # Rule NAME FROM TO - IN ON AT SAVE LETTER/S |
574756e4 | 1597 | Rule Para 1975 1988 - Oct 1 0:00 1:00 - |
984263bc MD |
1598 | Rule Para 1975 1978 - Mar 1 0:00 0 - |
1599 | Rule Para 1979 1991 - Apr 1 0:00 0 - | |
574756e4 SW |
1600 | Rule Para 1989 only - Oct 22 0:00 1:00 - |
1601 | Rule Para 1990 only - Oct 1 0:00 1:00 - | |
1602 | Rule Para 1991 only - Oct 6 0:00 1:00 - | |
984263bc | 1603 | Rule Para 1992 only - Mar 1 0:00 0 - |
574756e4 | 1604 | Rule Para 1992 only - Oct 5 0:00 1:00 - |
984263bc | 1605 | Rule Para 1993 only - Mar 31 0:00 0 - |
574756e4 | 1606 | Rule Para 1993 1995 - Oct 1 0:00 1:00 - |
984263bc MD |
1607 | Rule Para 1994 1995 - Feb lastSun 0:00 0 - |
1608 | Rule Para 1996 only - Mar 1 0:00 0 - | |
1609 | # IATA SSIM (2000-02) says 1999-10-10; ignore this for now. | |
1610 | # From Steffen Thorsen (2000-10-02): | |
1611 | # I have three independent reports that Paraguay changed to DST this Sunday | |
1612 | # (10-01). | |
1613 | # | |
1614 | # Translated by Gwillim Law (2001-02-27) from | |
48afb8ac SW |
1615 | # Noticias, a daily paper in Asunción, Paraguay (2000-10-01): |
1616 | # http://www.diarionoticias.com.py/011000/nacional/naciona1.htm | |
984263bc MD |
1617 | # Starting at 0:00 today, the clock will be set forward 60 minutes, in |
1618 | # fulfillment of Decree No. 7,273 of the Executive Power.... The time change | |
1619 | # system has been operating for several years. Formerly there was a separate | |
1620 | # decree each year; the new law has the same effect, but permanently. Every | |
1621 | # year, the time will change on the first Sunday of October; likewise, the | |
1622 | # clock will be set back on the first Sunday of March. | |
1623 | # | |
574756e4 | 1624 | Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 - |
bd7414aa | 1625 | # IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger. |
984263bc | 1626 | Rule Para 1997 only - Feb lastSun 0:00 0 - |
bd7414aa | 1627 | # Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but |
984263bc MD |
1628 | # (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27). |
1629 | Rule Para 1998 2001 - Mar Sun>=1 0:00 0 - | |
1630 | # From Rives McDow (2002-02-28): | |
32e0bed6 | 1631 | # A decree was issued in Paraguay (No. 16350) on 2002-02-26 that changed the |
984263bc MD |
1632 | # dst method to be from the first Sunday in September to the first Sunday in |
1633 | # April. | |
bc95ec93 | 1634 | Rule Para 2002 2004 - Apr Sun>=1 0:00 0 - |
574756e4 | 1635 | Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 - |
bc95ec93 | 1636 | # |
48afb8ac | 1637 | # From Jesper Nørgaard Welen (2005-01-02): |
bc95ec93 SW |
1638 | # There are several sources that claim that Paraguay made |
1639 | # a timezone rule change in autumn 2004. | |
1640 | # From Steffen Thorsen (2005-01-05): | |
ff8424c5 | 1641 | # Decree 1,867 (2004-03-05) |
48afb8ac SW |
1642 | # From Carlos Raúl Perasso via Jesper Nørgaard Welen (2006-10-13) |
1643 | # http://www.presidencia.gov.py/decretos/D1867.pdf | |
574756e4 | 1644 | Rule Para 2004 2009 - Oct Sun>=15 0:00 1:00 - |
d9609dfd | 1645 | Rule Para 2005 2009 - Mar Sun>=8 0:00 0 - |
48afb8ac SW |
1646 | # From Carlos Raúl Perasso (2010-02-18): |
1647 | # By decree number 3958 issued yesterday | |
d9609dfd | 1648 | # http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf |
d9609dfd SW |
1649 | # Paraguay changes its DST schedule, postponing the March rule to April and |
1650 | # modifying the October date. The decree reads: | |
1651 | # ... | |
1652 | # Art. 1. It is hereby established that from the second Sunday of the month of | |
1653 | # April of this year (2010), the official time is to be set back 60 minutes, | |
1654 | # and that on the first Sunday of the month of October, it is to be set | |
1655 | # forward 60 minutes, in all the territory of the Paraguayan Republic. | |
1656 | # ... | |
574756e4 | 1657 | Rule Para 2010 max - Oct Sun>=1 0:00 1:00 - |
aee0b81b | 1658 | Rule Para 2010 2012 - Apr Sun>=8 0:00 0 - |
e1ff7155 SW |
1659 | # |
1660 | # From Steffen Thorsen (2013-03-07): | |
1661 | # Paraguay will end DST on 2013-03-24 00:00.... | |
e1ff7155 SW |
1662 | # http://www.ande.gov.py/interna.php?id=1075 |
1663 | # | |
48afb8ac | 1664 | # From Carlos Raúl Perasso (2013-03-15): |
aee0b81b SW |
1665 | # The change in Paraguay is now final. Decree number 10780 |
1666 | # http://www.presidencia.gov.py/uploads/pdf/presidencia-3b86ff4b691c79d4f5927ca964922ec74772ce857c02ca054a52a37b49afc7fb.pdf | |
48afb8ac | 1667 | # From Carlos Raúl Perasso (2014-02-28): |
39560a18 SW |
1668 | # Decree 1264 can be found at: |
1669 | # http://www.presidencia.gov.py/archivos/documentos/DECRETO1264_ey9r8zai.pdf | |
aee0b81b | 1670 | Rule Para 2013 max - Mar Sun>=22 0:00 0 - |
984263bc | 1671 | |
21152149 | 1672 | # Zone NAME STDOFF RULES FORMAT [UNTIL] |
984263bc | 1673 | Zone America/Asuncion -3:50:40 - LMT 1890 |
48afb8ac | 1674 | -3:50:40 - AMT 1931 Oct 10 # Asunción Mean Time |
83b0991f SW |
1675 | -4:00 - -04 1972 Oct |
1676 | -3:00 - -03 1974 Apr | |
1677 | -4:00 Para -04/-03 | |
984263bc MD |
1678 | |
1679 | # Peru | |
ba5ba9da | 1680 | # |
48afb8ac SW |
1681 | # From Evelyn C. Leeper via Mark Brader (2003-10-26) |
1682 | # <news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net>: | |
bc95ec93 | 1683 | # When we were in Peru in 1985-1986, they apparently switched over |
ba5ba9da JR |
1684 | # sometime between December 29 and January 3 while we were on the Amazon. |
1685 | # | |
bd7414aa SW |
1686 | # From Paul Eggert (2006-03-22): |
1687 | # Shanks & Pottenger don't have this transition. Assume 1986 was like 1987. | |
ba5ba9da | 1688 | |
b858e488 | 1689 | # Rule NAME FROM TO - IN ON AT SAVE LETTER/S |
574756e4 | 1690 | Rule Peru 1938 only - Jan 1 0:00 1:00 - |
984263bc | 1691 | Rule Peru 1938 only - Apr 1 0:00 0 - |
574756e4 | 1692 | Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 - |
984263bc | 1693 | Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 - |
574756e4 | 1694 | Rule Peru 1986 1987 - Jan 1 0:00 1:00 - |
ba5ba9da | 1695 | Rule Peru 1986 1987 - Apr 1 0:00 0 - |
574756e4 | 1696 | Rule Peru 1990 only - Jan 1 0:00 1:00 - |
984263bc | 1697 | Rule Peru 1990 only - Apr 1 0:00 0 - |
bd7414aa | 1698 | # IATA is ambiguous for 1993/1995; go with Shanks & Pottenger. |
574756e4 | 1699 | Rule Peru 1994 only - Jan 1 0:00 1:00 - |
984263bc | 1700 | Rule Peru 1994 only - Apr 1 0:00 0 - |
21152149 | 1701 | # Zone NAME STDOFF RULES FORMAT [UNTIL] |
984263bc MD |
1702 | Zone America/Lima -5:08:12 - LMT 1890 |
1703 | -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time? | |
83b0991f | 1704 | -5:00 Peru -05/-04 |
984263bc MD |
1705 | |
1706 | # South Georgia | |
21152149 | 1707 | # Zone NAME STDOFF RULES FORMAT [UNTIL] |
48afb8ac | 1708 | Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken |
83b0991f | 1709 | -2:00 - -02 |
984263bc MD |
1710 | |
1711 | # South Sandwich Is | |
1712 | # uninhabited; scientific personnel have wintered | |
1713 | ||
1714 | # Suriname | |
21152149 | 1715 | # Zone NAME STDOFF RULES FORMAT [UNTIL] |
984263bc MD |
1716 | Zone America/Paramaribo -3:40:40 - LMT 1911 |
1717 | -3:40:52 - PMT 1935 # Paramaribo Mean Time | |
48afb8ac | 1718 | -3:40:36 - PMT 1945 Oct # The capital moved? |
83b0991f SW |
1719 | -3:30 - -0330 1984 Oct |
1720 | -3:00 - -03 | |
984263bc MD |
1721 | |
1722 | # Trinidad and Tobago | |
65adea1d | 1723 | # See America/Puerto_Rico. |
d1bcb6be | 1724 | |
984263bc | 1725 | # Uruguay |
9ffe4b14 | 1726 | # From Paul Eggert (1993-11-18): |
984263bc | 1727 | # Uruguay wins the prize for the strangest peacetime manipulation of the rules. |
574756e4 SW |
1728 | # |
1729 | # From Tim Parenti (2018-02-20), per Jeremie Bonjour (2018-01-31) and Michael | |
1730 | # Deckers (2018-02-20): | |
1731 | # ... At least they kept good records... | |
1732 | # | |
1733 | # http://www.armada.mil.uy/ContenidosPDFs/sohma/web/almanaque/almanaque_2018.pdf#page=36 | |
1734 | # Page 36 of Almanaque 2018, published by the Oceanography, Hydrography, and | |
1735 | # Meteorology Service of the Uruguayan Navy, seems to give many transitions | |
1736 | # with greater clarity than we've had before. It directly references many laws | |
1737 | # and decrees which are, in turn, referenced below. They can be viewed in the | |
1738 | # public archives of the Diario Oficial (in Spanish) at | |
1739 | # http://www.impo.com.uy/diariooficial/ | |
1740 | # | |
1741 | # Ley No. 3920 of 1908-06-10 placed the determination of legal time under the | |
1742 | # auspices of the National Institute for the Prediction of Time. It is unclear | |
1743 | # exactly what offset was used during this period, though Ley No. 7200 of | |
1744 | # 1920-04-23 used the Observatory of the National Meteorological Institute in | |
1745 | # Montevideo (34° 54' 33" S, 56° 12' 45" W) as its reference meridian, | |
1746 | # retarding legal time by 15 minutes 9 seconds from 1920-04-30 24:00, | |
1747 | # resulting in UT-04. Assume the corresponding LMT of UT-03:44:51 (given on | |
1748 | # page 725 of the Proceedings of the Second Pan-American Scientific Congress, | |
1749 | # 1915-1916) was in use, and merely became official from 1908-06-10. | |
1750 | # https://www.impo.com.uy/diariooficial/1908/06/18/12 | |
1751 | # https://www.impo.com.uy/diariooficial/1920/04/27/9 | |
1752 | # | |
1753 | # Ley No. 7594 of 1923-06-28 specified legal time as Observatory time advanced | |
1754 | # by 44 minutes 51 seconds (UT-03) "from 30 September to 31 March", and by 14 | |
1755 | # minutes 51 seconds (UT-03:30) "the rest of the year"; a message from the | |
1756 | # National Council of Administration the same day, published directly below the | |
1757 | # law in the Diario Oficial, specified the first transition to be 1923-09-30 | |
1758 | # 24:00. This effectively established standard time at UT-03:30 with 30 | |
1759 | # minutes DST. Assume transitions at 24:00 on the specified days until Ley No. | |
1760 | # 7919 of 1926-03-05 ended this arrangement, repealing all "laws and other | |
1761 | # provisions which oppose" it, resulting in year-round UT-03:30; a Resolución | |
1762 | # of 1926-03-11 puts the final transition at 1926-03-31 24:00, the same as it | |
1763 | # would have been under the previous law. | |
1764 | # https://www.impo.com.uy/diariooficial/1923/07/02/2 | |
1765 | # https://www.impo.com.uy/diariooficial/1926/03/10/2 | |
1766 | # https://www.impo.com.uy/diariooficial/1926/03/18/2 | |
1767 | # | |
b858e488 | 1768 | # Rule NAME FROM TO - IN ON AT SAVE LETTER/S |
574756e4 | 1769 | Rule Uruguay 1923 1925 - Oct 1 0:00 0:30 - |
984263bc | 1770 | Rule Uruguay 1924 1926 - Apr 1 0:00 0 - |
574756e4 SW |
1771 | # From Tim Parenti (2018-02-15): |
1772 | # http://www.impo.com.uy/diariooficial/1933/10/27/6 | |
1773 | # | |
1774 | # It appears Ley No. 9122 of 1933 was never published as such in the Diario | |
1775 | # Oficial, but instead appeared as Document 26 in the Diario on Friday | |
1776 | # 1933-10-27 as a decree made Monday 1933-10-23 and filed under the Ministry of | |
1777 | # National Defense. It reinstituted a DST of 30 minutes (to UT-03) "from the | |
1778 | # last Sunday of October...until the last Saturday of March." In accordance | |
1779 | # with this provision, the first transition was explicitly specified in Article | |
1780 | # 2 of the decree as Saturday 1933-10-28 at 24:00; that is, Sunday 1933-10-29 | |
1781 | # at 00:00. Assume transitions at 00:00 Sunday throughout. | |
1782 | # | |
1783 | # Departing from the matter-of-fact nature of previous timekeeping laws, the | |
1784 | # 1933 decree "consider[s] the advantages of...the advance of legal time": | |
1785 | # | |
1786 | # "Whereas: The measure adopted by almost all nations at the time of the last | |
1787 | # World War still persists in North America and Europe, precisely because of | |
1788 | # the economic, hygienic, and social advantages derived from such an | |
1789 | # emergency measure... | |
1790 | # | |
1791 | # Whereas: The advance of the legal time during the summer seasons, by | |
1792 | # displacing social activity near sunrise, favors the citizen populations | |
1793 | # and especially the society that creates and works..." | |
1794 | # | |
1795 | # It further specified that "necessary measures" be taken to ensure that | |
1796 | # "public spectacles finish, in general, before [01:00]." | |
1797 | Rule Uruguay 1933 1938 - Oct lastSun 0:00 0:30 - | |
1798 | Rule Uruguay 1934 1941 - Mar lastSat 24:00 0 - | |
1799 | # From Tim Parenti (2018-02-15): | |
1800 | # Most of the Rules below, and their contemporaneous Zone lines, have been | |
1801 | # updated simply to match the Almanaque 2018. Although the document does not | |
1802 | # list exact transition times, midnight transitions were already present in our | |
1803 | # data here for all transitions through 2004-09, and this is both consistent | |
1804 | # with prior transitions and verified in several decrees marked below between | |
1805 | # 1939-09 and 2004-09, wherein the relevant text was typically of the form: | |
1806 | # | |
1807 | # "From 0 hours on [date], the legal time of the entire Republic will be... | |
1808 | # | |
1809 | # In accordance with [the preceding], on [previous date] at 24 hours, all | |
1810 | # clocks throughout the Republic will be [advanced/retarded] by..." | |
1811 | # | |
1812 | # It is possible that there is greater specificity to be found for the Rules | |
1813 | # below, but it is buried in no fewer than 40 different decrees individually | |
1814 | # referenced by the Almanaque for the period from 1939-09 to 2014-09. | |
1815 | # Four-fifths of these were promulgated less than two weeks before taking | |
1816 | # effect; more than half within a week and none more than 5 weeks. Only the | |
1817 | # handful with comments below have been checked with any thoroughness. | |
1818 | Rule Uruguay 1939 only - Oct 1 0:00 0:30 - | |
1819 | Rule Uruguay 1940 only - Oct 27 0:00 0:30 - | |
1820 | # From Tim Parenti (2018-02-15): | |
1821 | # Decreto 1145 of the Ministry of National Defense, dated 1941-07-26, specified | |
1822 | # UT-03 from Friday 1941-08-01 00:00, citing an "urgent...need to save fuel". | |
1823 | # http://www.impo.com.uy/diariooficial/1941/08/04/1 | |
1824 | Rule Uruguay 1941 only - Aug 1 0:00 0:30 - | |
1825 | # From Tim Parenti (2018-02-15): | |
1826 | # Decreto 1866 of the Ministry of National Defense, dated 1942-12-09, specified | |
1827 | # further advancement (to UT-02:30) from Sunday 1942-12-13 24:00. Since clocks | |
1828 | # never went back to UT-03:30 thereafter, this is modeled as advancing standard | |
1829 | # time by 30 minutes to UT-03, while retaining 30 minutes of DST. | |
1830 | # http://www.impo.com.uy/diariooficial/1942/12/16/3 | |
1831 | Rule Uruguay 1942 only - Dec 14 0:00 0:30 - | |
984263bc | 1832 | Rule Uruguay 1943 only - Mar 14 0:00 0 - |
574756e4 | 1833 | Rule Uruguay 1959 only - May 24 0:00 0:30 - |
984263bc | 1834 | Rule Uruguay 1959 only - Nov 15 0:00 0 - |
574756e4 | 1835 | Rule Uruguay 1960 only - Jan 17 0:00 1:00 - |
984263bc | 1836 | Rule Uruguay 1960 only - Mar 6 0:00 0 - |
574756e4 | 1837 | Rule Uruguay 1965 only - Apr 4 0:00 1:00 - |
984263bc | 1838 | Rule Uruguay 1965 only - Sep 26 0:00 0 - |
574756e4 SW |
1839 | # From Tim Parenti (2018-02-15): |
1840 | # Decreto 321/968 of 1968-05-25, citing emergency drought measures decreed the | |
1841 | # day before, brought clocks forward 30 minutes from Monday 1968-05-27 00:00. | |
1842 | # http://www.impo.com.uy/diariooficial/1968/05/30/5 | |
1843 | Rule Uruguay 1968 only - May 27 0:00 0:30 - | |
1844 | Rule Uruguay 1968 only - Dec 1 0:00 0 - | |
1845 | # From Tim Parenti (2018-02-15): | |
1846 | # Decreto 188/970 of 1970-04-23 instituted restrictions on electricity | |
1847 | # consumption "as a consequence of the current rainfall regime in the country". | |
1848 | # Articles 13 and 14 advanced clocks by an hour from Saturday 1970-04-25 00:00. | |
1849 | # http://www.impo.com.uy/diariooficial/1970/04/29/4 | |
1850 | Rule Uruguay 1970 only - Apr 25 0:00 1:00 - | |
1851 | Rule Uruguay 1970 only - Jun 14 0:00 0 - | |
1852 | Rule Uruguay 1972 only - Apr 23 0:00 1:00 - | |
1853 | Rule Uruguay 1972 only - Jul 16 0:00 0 - | |
1854 | # From Tim Parenti (2018-02-15): | |
1855 | # Decreto 29/974 of 1974-01-11, citing "the international rise in the price of | |
1856 | # oil", advanced clocks by 90 minutes (to UT-01:30). Decreto 163/974 of | |
1857 | # 1974-03-04 returned 60 of those minutes (to UT-02:30), and the remaining 30 | |
1858 | # minutes followed in Decreto 679/974 of 1974-08-29. | |
1859 | # http://www.impo.com.uy/diariooficial/1974/01/22/11 | |
1860 | # http://www.impo.com.uy/diariooficial/1974/03/14/3 | |
1861 | # http://www.impo.com.uy/diariooficial/1974/09/04/6 | |
1862 | Rule Uruguay 1974 only - Jan 13 0:00 1:30 - | |
1863 | Rule Uruguay 1974 only - Mar 10 0:00 0:30 - | |
1864 | Rule Uruguay 1974 only - Sep 1 0:00 0 - | |
1865 | Rule Uruguay 1974 only - Dec 22 0:00 1:00 - | |
1866 | Rule Uruguay 1975 only - Mar 30 0:00 0 - | |
1867 | Rule Uruguay 1976 only - Dec 19 0:00 1:00 - | |
1868 | Rule Uruguay 1977 only - Mar 6 0:00 0 - | |
1869 | Rule Uruguay 1977 only - Dec 4 0:00 1:00 - | |
1870 | Rule Uruguay 1978 1979 - Mar Sun>=1 0:00 0 - | |
1871 | Rule Uruguay 1978 only - Dec 17 0:00 1:00 - | |
1872 | Rule Uruguay 1979 only - Apr 29 0:00 1:00 - | |
1873 | Rule Uruguay 1980 only - Mar 16 0:00 0 - | |
1874 | # From Tim Parenti (2018-02-15): | |
1875 | # Decreto 725/987 of 1987-12-04 cited "better use of national tourist | |
1876 | # attractions" to advance clocks one hour from Monday 1987-12-14 00:00. | |
1877 | # http://www.impo.com.uy/diariooficial/1988/01/25/1 | |
1878 | Rule Uruguay 1987 only - Dec 14 0:00 1:00 - | |
1879 | Rule Uruguay 1988 only - Feb 28 0:00 0 - | |
1880 | Rule Uruguay 1988 only - Dec 11 0:00 1:00 - | |
1881 | Rule Uruguay 1989 only - Mar 5 0:00 0 - | |
1882 | Rule Uruguay 1989 only - Oct 29 0:00 1:00 - | |
1883 | Rule Uruguay 1990 only - Feb 25 0:00 0 - | |
1884 | # From Tim Parenti (2018-02-15), per Paul Eggert (1999-11-04): | |
1885 | # IATA agrees as below for 1990-10 through 1993-02. Per Almanaque 2018, the | |
1886 | # 1992/1993 season appears to be the first in over half a century where DST | |
1887 | # both began and ended pursuant to the same decree. | |
1888 | Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 - | |
1889 | Rule Uruguay 1991 1992 - Mar Sun>=1 0:00 0 - | |
1890 | Rule Uruguay 1992 only - Oct 18 0:00 1:00 - | |
984263bc | 1891 | Rule Uruguay 1993 only - Feb 28 0:00 0 - |
bc95ec93 | 1892 | # From Eduardo Cota (2004-09-20): |
48afb8ac | 1893 | # The Uruguayan government has decreed a change in the local time.... |
574756e4 SW |
1894 | # From Tim Parenti (2018-02-15): |
1895 | # Decreto 328/004 of 2004-09-15. | |
1896 | # http://www.impo.com.uy/diariooficial/2004/09/23/documentos.pdf#page=1 | |
1897 | Rule Uruguay 2004 only - Sep 19 0:00 1:00 - | |
bc95ec93 SW |
1898 | # From Steffen Thorsen (2005-03-11): |
1899 | # Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to | |
1900 | # save energy ... it was postponed two weeks.... | |
574756e4 SW |
1901 | # From Tim Parenti (2018-02-15): |
1902 | # This 2005 postponement is not in Almanaque 2018. Go with the contemporaneous | |
1903 | # reporting, which is confirmed by Decreto 107/005 of 2005-03-10 amending | |
1904 | # Decreto 328/004: | |
1905 | # http://www.impo.com.uy/diariooficial/2005/03/15/documentos.pdf#page=1 | |
1906 | # The original decree specified a transition of 2005-03-12 24:00, but the new | |
1907 | # one specified 2005-03-27 02:00. | |
bc95ec93 | 1908 | Rule Uruguay 2005 only - Mar 27 2:00 0 - |
e1e23b59 | 1909 | # From Eduardo Cota (2005-09-27): |
574756e4 SW |
1910 | # ...from 2005-10-09 at 02:00 local time, until 2006-03-12 at 02:00 local time, |
1911 | # official time in Uruguay will be at GMT -2. | |
1912 | # From Tim Parenti (2018-02-15): | |
1913 | # Decreto 318/005 of 2005-09-19. | |
1914 | # http://www.impo.com.uy/diariooficial/2005/09/23/documentos.pdf#page=1 | |
1915 | Rule Uruguay 2005 only - Oct 9 2:00 1:00 - | |
1916 | Rule Uruguay 2006 2015 - Mar Sun>=8 2:00 0 - | |
1917 | # From Tim Parenti (2018-02-15), per Jesper Nørgaard Welen (2006-09-06): | |
1918 | # Decreto 311/006 of 2006-09-04 established regular DST from the first Sunday | |
1919 | # of October at 02:00 through the second Sunday of March at 02:00. Almanaque | |
1920 | # 2018 appears to have a few typoed dates through this period; ignore them. | |
1921 | # http://www.impo.com.uy/diariooficial/2006/09/08/documentos.pdf#page=1 | |
1922 | Rule Uruguay 2006 2014 - Oct Sun>=1 2:00 1:00 - | |
32e0bed6 SW |
1923 | # From Steffen Thorsen (2015-06-30): |
1924 | # ... it looks like they will not be using DST the coming summer: | |
1925 | # http://www.elobservador.com.uy/gobierno-resolvio-que-no-habra-cambio-horario-verano-n656787 | |
1926 | # http://www.republica.com.uy/este-ano-no-se-modificara-el-huso-horario-en-uruguay/523760/ | |
1927 | # From Paul Eggert (2015-06-30): | |
1928 | # Apparently restaurateurs complained that DST caused people to go to the beach | |
1929 | # instead of out to dinner. | |
1930 | # From Pablo Camargo (2015-07-13): | |
1931 | # http://archivo.presidencia.gub.uy/sci/decretos/2015/06/cons_min_201.pdf | |
574756e4 SW |
1932 | # From Tim Parenti (2018-02-15): |
1933 | # Decreto 178/015 of 2015-06-29; repeals Decreto 311/006. | |
83b0991f SW |
1934 | |
1935 | # This Zone can be simplified once we assume zic %z. | |
574756e4 SW |
1936 | Zone America/Montevideo -3:44:51 - LMT 1908 Jun 10 |
1937 | -3:44:51 - MMT 1920 May 1 # Montevideo MT | |
1938 | -4:00 - -04 1923 Oct 1 | |
83b0991f | 1939 | -3:30 Uruguay -0330/-03 1942 Dec 14 |
574756e4 | 1940 | -3:00 Uruguay -03/-0230 1960 |
83b0991f | 1941 | -3:00 Uruguay -03/-02 1968 |
574756e4 | 1942 | -3:00 Uruguay -03/-0230 1970 |
83b0991f | 1943 | -3:00 Uruguay -03/-02 1974 |
574756e4 | 1944 | -3:00 Uruguay -03/-0130 1974 Mar 10 |
83b0991f SW |
1945 | -3:00 Uruguay -03/-0230 1974 Dec 22 |
1946 | -3:00 Uruguay -03/-02 | |
984263bc MD |
1947 | |
1948 | # Venezuela | |
bbe9957d | 1949 | # |
32e0bed6 SW |
1950 | # From Paul Eggert (2015-07-28): |
1951 | # For the 1965 transition see Gaceta Oficial No. 27.619 (1964-12-15), p 205.533 | |
1952 | # http://www.pgr.gob.ve/dmdocuments/1964/27619.pdf | |
1953 | # | |
9d5f55b0 SW |
1954 | # From John Stainforth (2007-11-28): |
1955 | # ... the change for Venezuela originally expected for 2007-12-31 has | |
1956 | # been brought forward to 2007-12-09. The official announcement was | |
48afb8ac SW |
1957 | # published today in the "Gaceta Oficial de la República Bolivariana |
1958 | # de Venezuela, número 38.819" (official document for all laws or | |
9d5f55b0 SW |
1959 | # resolution publication) |
1960 | # http://www.globovision.com/news.php?nid=72208 | |
bbe9957d | 1961 | |
d6c80b25 SW |
1962 | # From Alexander Krivenyshev (2016-04-15): |
1963 | # https://actualidad.rt.com/actualidad/204758-venezuela-modificar-huso-horario-sequia-elnino | |
1964 | # | |
1965 | # From Paul Eggert (2016-04-15): | |
a1b6a6c6 | 1966 | # Clocks advance 30 minutes on 2016-05-01 at 02:30.... |
d6c80b25 | 1967 | # "'Venezuela's new time-zone: hours without light, hours without water, |
a1b6a6c6 SW |
1968 | # hours of presidential broadcasts, hours of lines,' quipped comedian |
1969 | # Jean Mary Curró ...". See: Cawthorne A, Kai D. Venezuela scraps | |
d6c80b25 | 1970 | # half-hour time difference set by Chavez. Reuters 2016-04-15 14:50 -0400 |
e4ac9488 | 1971 | # https://www.reuters.com/article/us-venezuela-timezone-idUSKCN0XC2BE |
a1b6a6c6 SW |
1972 | # |
1973 | # From Matt Johnson (2016-04-20): | |
1974 | # ... published in the official Gazette [2016-04-18], here: | |
1975 | # http://historico.tsj.gob.ve/gaceta_ext/abril/1842016/E-1842016-4551.pdf | |
d6c80b25 | 1976 | |
21152149 | 1977 | # Zone NAME STDOFF RULES FORMAT [UNTIL] |
984263bc MD |
1978 | Zone America/Caracas -4:27:44 - LMT 1890 |
1979 | -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time? | |
83b0991f SW |
1980 | -4:30 - -0430 1965 Jan 1 0:00 |
1981 | -4:00 - -04 2007 Dec 9 3:00 | |
1982 | -4:30 - -0430 2016 May 1 2:30 | |
1983 | -4:00 - -04 |