December 2020 - tz - lists.iana.org

Daylight saving time in Argentina
by Pol Dec. 24, 2020

Dec. 24, 2020

I have some inconsistencies in the database regarding some time changes in Argentina. I would like to know what is the possibility of corroborating and making these changes. To give just one example, 03-06-1993 Buenos Aires, Argentina would still be GMT -2 (due to the time change from -3 to -2 that took place on 10-18-1992) and the return to -2 occurred just the next day (03-07-1993). Thanks in advance Pol Neiman <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai…> Libre de virus. www.avast.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai…> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>

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Time zone and UTC
by Jacques Grillet Dec. 24, 2020

Dec. 24, 2020

Hello Do you propose a database to download ordered by UTC with 2 columns If not, where is it possible to have this data UTC | Time zone name Thank you Meilleures salutations, Jacques Grillet M. 079 219 17 78

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tzdata-latest.tar.gz tarball points to tzdata2020d
by Kiran Ravikumar Dec. 23, 2020

Dec. 23, 2020

Hello, Looks like the latest(tzdata-latest.tar.gz) release tar bundle points to tzdata2020d - https://www.iana.org/time-zones/repository/tzdata-latest.tar.gz. Can we get it updated to tzdata2020e? Thanks, Kiran

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Re: [tz] Volgograd is planning to change its time zone back to Moscow on December 20, 2020
by Paul Eggert Dec. 22, 2020

Dec. 22, 2020

On 12/2/20 2:57 PM, wtz wrote: > (State Duma plan to pass the Bill in the second and third reading next week - > around December 9, 2020) Thanks for keeping us up-to-date. After December 9, it'll still need a look-see by the Federation Council and a signing by the president before it's a done deal. Not much time before the time change on December 20. I suppose people will just use "Europe/Moscow" if their tzdb copies aren't updated in time. Your source says "в скандальном вопросе" ("v skandal'nom voprose"), a curious choice of words. The extreme lack of notice is scandalous from my point of view, and perhaps the source is making the same point.

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[PATCH] Improve doc of zic coalescing zone+DST transitions
by Paul Eggert Dec. 22, 2020

Dec. 22, 2020

* zic.8: Improve documentation for how certain transitions are coalesced. Also, use current data for America/Menominee instead an America/Grand_Turk entry that not in current data. Improvements suggested by Tim Parenti. --- zic.8 | 36 +++++++++++++++++++++--------------- 1 file changed, 21 insertions(+), 15 deletions(-) diff --git a/zic.8 b/zic.8 index 2273dad..60262d7 100644 --- a/zic.8 +++ b/zic.8 @@ -590,35 +590,41 @@ first transition into standard time. In a single zone it is an error if two rules take effect at the same instant, or if two zone changes take effect at the same instant. .PP -If a continuation line subtracts from the UT offset after a transition that -would be interpreted to be later if using the continuation line's rules, the +If a continuation line subtracts +.I N +seconds from the UT offset after a transition that would be +interpreted to be later if using the continuation line's UT offset and +rules, the .q "until" -time of the earlier zone or continuation line is interpreted according -to the continuation line's rules. +time of the previous zone or continuation line is interpreted +according to the continuation line's UT offset and rules, and any rule +that would otherwise take effect in the next +.I N +seconds is instead assumed to take effect simultaneously. For example: .br .ne 7 .nf .in +2m -.ta \w'# Rule\0\0'u +\w'NAME\0\0'u +\w'FROM\0\0'u +\w'max\0\0'u +\w'\*-\0\0'u +\w'Mar\0\0'u +\w'Sun>=8\0\0'u +\w'2:00\0\0'u +\w'SAVE\0\0'u +.ta \w'# Rule\0\0'u +\w'NAME\0\0'u +\w'FROM\0\0'u +\w'2006\0\0'u +\w'\*-\0\0'u +\w'Oct\0\0'u +\w'lastSun\0\0'u +\w'2:00\0\0'u +\w'SAVE\0\0'u .sp # Rule NAME FROM TO \*- IN ON AT SAVE LETTER/S -Rule US 2007 max \*- Mar Sun>=8 2:00 1:00 D -Rule US 2007 max \*- Nov Sun>=1 2:00 0 S -.ta \w'Zone\0\0America/Grand_Turk\0\0'u +\w'STDOFF\0\0'u +\w'RULES\0\0'u +\w'FORMAT\0\0'u +Rule US 1967 2006 - Oct lastSun 2:00 0 S +Rule US 1967 1973 - Apr lastSun 2:00 1:00 D +.ta \w'Zone\0\0America/Menominee\0\0'u +\w'STDOFF\0\0'u +\w'RULES\0\0'u +\w'FORMAT\0\0'u # Zone\0\0NAME STDOFF RULES FORMAT [UNTIL] -Zone\0\0America/Grand_Turk \*-4:00 \*- AST 2018 Mar 11 2:00 - \*-5:00 US E%sT +Zone\0\0America/Menominee \*-5:00 \*- EST 1973 Apr 29 2:00 + \*-6:00 US C%sT .sp .in .fi -Here, an incorrect reading would be there were two clock changes on 2018-03-11, -the first from 02:00 AST (\*-04) to 01:00 EST (\*-05), -and the second an hour later from 02:00 EST (\*-05) to 03:00 EDT (\*-04). +Here, an incorrect reading would be there were two clock changes on 1973-04-29, +the first from 02:00 EST (\*-05) to 01:00 CST (\*-06), +and the second an hour later from 02:00 CST (\*-06) to 03:00 CDT (\*-05). However, .B zic -interprets this more sensibly as a single transition from 02:00 AST (\*-04) to -02:00 EDT (\*-04). +interprets this more sensibly as a single transition from 02:00 CST (\*-05) to +02:00 CDT (\*-05). .PP A link line has the form .sp -- 2.27.0

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Re: [tz] Europe/Volgograd timezone changes in Russia
by Novoselov, Iliya Dec. 21, 2020

Dec. 21, 2020

?Hello, We're writing you on behalf of Russian software developer - Nexign, and all of its clients. Your IANA DB is used in our products as an industrial standart. The reason of this email is that Russian government is about to decide to change the Europe/Volgograd timezone from +4 to +3. This is going to affect our software and our customers, so we would like to know: 1. Are you aware of this changes? 2. Has the patch of IANA DB been planned already? If not, what should be done for that to happen, and how can we help? --------------------------------------------------------------------- Iliya Novoselov Teamlead, "Tariffication" Domain, Saint-Petersburg city Maintenance and Support Department nexign iliya.novoselov(a)nexign-systems.com<mailto:iliya.novoselov@nexign-systems.com> nexign-systems.com ---------------------------------------------------------------------

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Ontario moving to permanent DST? Perhaps someday.
by Tim Parenti Dec. 5, 2020

Dec. 5, 2020

The Legislative Assembly of Ontario has passed a bill which would advance standard time in the province by one hour and repeal the seasonal clock changes — effectively putting the province on year-round daylight saving time. https://globalnews.ca/news/7485079/ontario-daylight-saving-time-amendment-a… According to MPP Jeremy Roberts, who introduced the private member's bill, the legislation would require "coordination" with neighboring jurisdictions such as Quebec and New York state, and "would not come into effect until the Attorney General decides it should come into effect." Indeed, the text of the bill states that the act "comes into force on a day to be named by proclamation of the Lieutenant Governor", who represents the Canadian monarch. The bill passed the assembly unanimously on its third reading and received Royal Assent on 30 November 2020. https://www.ola.org/en/legislative-business/bills/parliament-42/session-1/b… https://www.ola.org/sites/default/files/node-files/bill/document/pdf/2020/2… -- Tim Parenti

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Volgograd is planning to change its time zone back to Moscow on December 20, 2020
by wtz＠worldtimezone.com Dec. 2, 2020

Dec. 2, 2020

The State Duma approved (Nov 24, 2020) the transition of the Volgograd region to the Moscow time zone. According to Draft Federal Law N 1012130-7 "On amendments to article 5 of the Federal law" "On the calculation of time" Nest step is approval by the Federation Council and the President. If approved by the the Federation Council and the President, this Federal Law 1012130-7 will enter into force on December 20, 2020 See reference links below: https://sozd.duma.gov.ru/bill/1012130-7 http://docs.cntd.ru/document/566418247 The State Duma approved the transition of the Volgograd region to the Moscow time zone. https://gorvesti.ru/society/gosduma-progolosovala-za-vozvrat-volgogradskoy-… Volgograd oblast (Volgograd) is going to change its time zone back to Moscow time (from UTC+4 (MSK+1) to UTC+3 (MSK)) on December 20, 2020 https://www.worldtimezone.com/dst_news/dst_news_russia76.html Regards, Alexander Krivenyshev, WorldTimeZone.com

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Some time zone history (1)
by Paul Eggert Dec. 2, 2020

Dec. 2, 2020

> The Determination of the Time Ordinance, 1919 commenced on 1919-11-24. Thanks for catching my typo; proposed patch attached and installed into GitHub. > Also, the Defence (Revocation) (No.4) Regulations, 1945 commenced on 1946-01-06. True, but how would that affect tzdb? As I understand it, those regulations <https://books.google.com/books?id=9as-AQAAIAAJ&pg=PA256> repeal DST, but on 1946-01-06 Gold Coast was already on standard time (having switched from DST on 1946-01-01). Hence on 1946-01-06 there was no clock transition, merely a change in which regulation was in force.

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