Chile goes back to DST (...)
Today the Chilean Ministry of Energy announced that they will go back to a DST scheme this year. That means clocks will go back 1 hour at 0:00 May 15th (jumping back to May 14th); and will go forward by 1 hour on 0:00, August 14th. This was decided after a public outcry during winter, when the sunrise for Santiago went as late as 8:45 AM Some media outlets carrying the news (in Spanish): - http://www.soychile.cl/Santiago/Sociedad/2016/03/13/380779/Vuelve-el- horario-de-invierno-a-partir-de-la-segunda-semana-de-mayo.aspx - http://www.biobiochile.cl/2016/03/13/gobierno-retrocede-y-decreta-el- regreso-del-horario-de-invierno.shtml - http://www.t13.cl/noticia/nacional/chile-volvera-implementar-horario- invierno There is no official decree yet; or confirmation whether this decision will be only for 2016, or will be carried from now on (or until the next goverment :P) -- Juan Correa Poblete PS Labs (http://www.pslabs.cl)
Thanks for the heads-up; attached is a proposed patch. This won't make the 2016b release, but should make the next release after that.
Tested the patch around transition dates (for 2014, 2015, 2016 and DST end on 2017); and works OK There's now a post on the official website of Ministry of Energy, that titles "Chile will have 9 months of DST" < http://www.energia.gob.cl/tema-de-interes/chile-tendra-9-meses-de-horario-de>. No official decree yet; I'll mail it as soon it's published On Mon, Mar 14, 2016 at 5:03 AM, Paul Eggert <eggert@cs.ucla.edu> wrote:
Thanks for the heads-up; attached is a proposed patch. This won't make the 2016b release, but should make the next release after that.
-- Juan Correa Poblete PS Labs (http://www.pslabs.cl) +56-9-99193873
On 14 Mar 2016 04:03, Paul Eggert wrote:
Thanks for the heads-up; attached is a proposed patch.
This seems to forget Antarctica/Palmer, which (in the absence of contrary evidence) would presumably observe the same changes. Further patch 0002 attached. (Re-sent 0001 also fixes a small typo in Paul's commit message.) -- Tim Parenti
On 03/14/2016 10:37 PM, Tim Parenti wrote:
This seems to forget Antarctica/Palmer, which (in the absence of contrary evidence) would presumably observe the same changes. Further patch 0002 attached.
(Re-sent 0001 also fixes a small typo in Paul's commit message.)
Thanks for catching those problems. I forgot to push my incorrect Chile change, so I took the liberty of fixing it up as per your fixes and pushing the attached combined proposed patch instead.
Dear Paul, Today has been publishied the official report for the DST change for Chile, includes rules until May of 2019 http://www.diariooficial.interior.gob.cl/media/2016/03/18/do-20160318.pdf Rules: GMT --04 : Starts at second Saturday of May at 24:00 Hrs GMT --03 : Starts at second Saturday of August at 24:00 Hrs (Summer Time) Saludos ----- Mensaje original ----- De: "Paul Eggert" <eggert@cs.ucla.edu> Para: "Tim Parenti" <tim@timtimeonline.com> CC: "Time Zone Mailing List" <tz@iana.org> Enviados: Jueves, 17 de Marzo 2016 18:17:19 Asunto: Re: [tz] Chile goes back to DST (...) On 03/14/2016 10:37 PM, Tim Parenti wrote:
This seems to forget Antarctica/Palmer, which (in the absence of contrary evidence) would presumably observe the same changes. Further patch 0002 attached.
(Re-sent 0001 also fixes a small typo in Paul's commit message.)
Thanks for catching those problems. I forgot to push my incorrect Chile change, so I took the liberty of fixing it up as per your fixes and pushing the attached combined proposed patch instead.
On Mar 18, 2016, at 7:03 AM, Eduardo Romero Urra <eromerou@interior.gov.cl<mailto:eromerou@interior.gov.cl>> wrote: Dear Paul, Today has been publishied the official report for the DST change for Chile, includes rules until May of 2019 http://www.diariooficial.interior.gob.cl/media/2016/03/18/do-20160318.pdf Rules: GMT --04 : Starts at second Saturday of May at 24:00 Hrs Is that the same as "Sunday after the second saturday of May, at 00:00 hrs? I noticed the announcement also states that the same rule (but with an offset of -6 hours instead of -4) applies to Easter Island and Sala y Gomez Islands. paul
Dear Paul, you've correct , de decree includes --05 GMT for Eastern Island (Chile/Eastern_Island or Pacific/Eastern_Island ) for Summer Time and --06 from May to August, always keeping a 2 hours difference from the Continent. Saludos/Regards ----- Mensaje original ----- De: "Paul Koning" <Paul_Koning@dell.com> Para: eromerou@interior.gov.cl CC: tz@iana.org Enviados: Viernes, 18 de Marzo 2016 12:38:41 Asunto: Re: [tz] Chile goes back to DST (...) On Mar 18, 2016, at 7:03 AM, Eduardo Romero Urra < eromerou@interior.gov.cl > wrote: Dear Paul, Today has been publishied the official report for the DST change for Chile, includes rules until May of 2019 http://www.diariooficial.interior.gob.cl/media/2016/03/18/do-20160318.pdf Rules: GMT --04 : Starts at second Saturday of May at 24:00 Hrs Is that the same as "Sunday after the second saturday of May, at 00:00 hrs? I noticed the announcement also states that the same rule (but with an offset of -6 hours instead of -4) applies to Easter Island and Sala y Gomez Islands. paul
On 03/18/2016 08:46 AM, Eduardo Romero Urra wrote:
you've correct , de decree includes --05 GMT for Eastern Island (Chile/Eastern_Island or Pacific/Eastern_Island ) for Summer Time and --06from May to August, always keeping a 2 hours difference from the Continent.
Thanks, so it appears I was too hasty for that part of the patch. I have reverted its changes to the data by applying the attached further patch.
The decree regarding DST has been published in today's Official Gazette: < http://www.diariooficial.interior.gob.cl/versiones-anteriores/do/20160318/>, text-only copy on <http://www.leychile.cl/Navegar?idNorma=1088502> It does consider the second saturday of May and August as the dates for the transition; and it lists DST dates until 2019, but I think this scheme will stick On Mon, Mar 14, 2016 at 5:03 AM, Paul Eggert <eggert@cs.ucla.edu> wrote:
Thanks for the heads-up; attached is a proposed patch. This won't make the 2016b release, but should make the next release after that.
-- Juan Correa Poblete PS Labs (http://www.pslabs.cl) +56-9-99193873
Thanks for the information. From the wording in the new decree, it appears that Chile will change its practice this year for Easter Island Time (Hora Oficial de Chile Insular Occidental), as described below. I wonder: is this correct? In 2008, as documented in <https://web.archive.org/web/20090701000801/http://www.shoa.cl/noticias/2008/...>, Chile kept Easter Island Time two hours behind mainland time: when the mainland switched at 24:00 local time, Easter Island switched at 22:00 local time. This is the practice in the European Union. In contrast, this week's decree says that mainland and Easter Island both switch at 24:00 local time, which means the mainland will switch two hours before Easter Island does. This is the practice in North America. Has the practice really changed in Chile, and if so, do you know which year the new practice was introduced? I don't speak Spanish natively and so could be misreading the decree; comments are welcome. In the meantime a, proposed further patch to tzdata is attached and is installed in the experimental tzdata version on GitHub <https://github.com/eggert/tz>; this patch assumes that the new Chilean practice is being introduced this year.
I guess it keeps the EU-style time change; as the "hora oficial" is the time used in mainland (Chile Continental). Easter Island is called "Hora Oficial de Chile Insular Occidental", as per decree 1142-1980 from Ministerio del Interior <http://www.leychile.cl/Navegar?idNorma=17012>. Probably Eduardo could ask around and check that. On Fri, Mar 18, 2016 at 3:10 PM, Paul Eggert <eggert@cs.ucla.edu> wrote:
Thanks for the information. From the wording in the new decree, it appears that Chile will change its practice this year for Easter Island Time (Hora Oficial de Chile Insular Occidental), as described below. I wonder: is this correct?
In 2008, as documented in < https://web.archive.org/web/20090701000801/http://www.shoa.cl/noticias/2008/...>, Chile kept Easter Island Time two hours behind mainland time: when the mainland switched at 24:00 local time, Easter Island switched at 22:00 local time. This is the practice in the European Union.
In contrast, this week's decree says that mainland and Easter Island both switch at 24:00 local time, which means the mainland will switch two hours before Easter Island does. This is the practice in North America.
Has the practice really changed in Chile, and if so, do you know which year the new practice was introduced?
I don't speak Spanish natively and so could be misreading the decree; comments are welcome. In the meantime a, proposed further patch to tzdata is attached and is installed in the experimental tzdata version on GitHub < https://github.com/eggert/tz>; this patch assumes that the new Chilean practice is being introduced this year.
-- Juan Correa Poblete PS Labs (http://www.pslabs.cl) +56-9-99193873
On 03/18/2016 12:36 PM, Juan Correa wrote:
I guess it keeps the EU-style time change; as the "hora oficial" is the time used in mainland (Chile Continental). Easter Island is called "Hora Oficial de Chile Insular Occidental", as per decree 1142-1980 from Ministerio del Interior <http://www.leychile.cl/Navegar?idNorma=17012>.
Perhaps you're right; still, it is odd. The decree does not mention anything like an EU-style practice; it talks only about a transition at 24:00, regardless of location. On the other hand, the 2008 announcement from SHOA (Servicio Hidrográfico y Oceanográfico de la Armada de Chile) looks official too and is quite explicit using an EU-style practice. Possibly SHOA is entrusted with determining what "24:00" means, and has decided that it means 24:00 at SHOA headquarters rather than 24:00 local time. If so, we should revert that part of the Chile change (i.e., revert the user-visible aspect of commit 483247fc9b735097ff2c06531204913317a5056c). It would be nice to have some confirmation of this, though. One possibility is to wait until SHOA announces the change on their website. (It's not there yet.)
participants (5)
-
Eduardo Romero Urra -
Juan Correa -
Paul Eggert -
Paul_Koning＠dell.com -
Tim Parenti