March 2021 - tz - lists.iana.org

Re: [tz] Morocco : Ramdan Time Change 2021
by Paul Eggert 15 Mar '23

15 Mar '23

On 3/19/21 3:15 AM, Semlali Naoufal wrote: > At the moment, we have no official government announcement to this effect. But, logically, the change to the GMT schedule should be made on the night of April 10-11, 2021 (last weekend before Ramadan). Yes, that's been the tzdb prediction too, ever since tzdb version 2018h (2018-12-23). For the record, here are tzdb's current predictions Morocco transitions during the next five years. Sun Apr 11 01:59:59 2021 UT = Sun Apr 11 02:59:59 2021 +01 Sun Apr 11 02:00:00 2021 UT = Sun Apr 11 02:00:00 2021 +00 Sun May 16 01:59:59 2021 UT = Sun May 16 01:59:59 2021 +00 Sun May 16 02:00:00 2021 UT = Sun May 16 03:00:00 2021 +01 Sun Mar 27 01:59:59 2022 UT = Sun Mar 27 02:59:59 2022 +01 Sun Mar 27 02:00:00 2022 UT = Sun Mar 27 02:00:00 2022 +00 Sun May 8 01:59:59 2022 UT = Sun May 8 01:59:59 2022 +00 Sun May 8 02:00:00 2022 UT = Sun May 8 03:00:00 2022 +01 Sun Mar 19 01:59:59 2023 UT = Sun Mar 19 02:59:59 2023 +01 Sun Mar 19 02:00:00 2023 UT = Sun Mar 19 02:00:00 2023 +00 Sun Apr 30 01:59:59 2023 UT = Sun Apr 30 01:59:59 2023 +00 Sun Apr 30 02:00:00 2023 UT = Sun Apr 30 03:00:00 2023 +01 Sun Mar 10 01:59:59 2024 UT = Sun Mar 10 02:59:59 2024 +01 Sun Mar 10 02:00:00 2024 UT = Sun Mar 10 02:00:00 2024 +00 Sun Apr 14 01:59:59 2024 UT = Sun Apr 14 01:59:59 2024 +00 Sun Apr 14 02:00:00 2024 UT = Sun Apr 14 03:00:00 2024 +01 Sun Feb 23 01:59:59 2025 UT = Sun Feb 23 02:59:59 2025 +01 Sun Feb 23 02:00:00 2025 UT = Sun Feb 23 02:00:00 2025 +00 Sun Apr 6 01:59:59 2025 UT = Sun Apr 6 01:59:59 2025 +00 Sun Apr 6 02:00:00 2025 UT = Sun Apr 6 03:00:00 2025 +01 Sun Feb 15 01:59:59 2026 UT = Sun Feb 15 02:59:59 2026 +01 Sun Feb 15 02:00:00 2026 UT = Sun Feb 15 02:00:00 2026 +00 Sun Mar 22 01:59:59 2026 UT = Sun Mar 22 01:59:59 2026 +00 Sun Mar 22 02:00:00 2026 UT = Sun Mar 22 03:00:00 2026 +01 Sun Feb 7 01:59:59 2027 UT = Sun Feb 7 02:59:59 2027 +01 Sun Feb 7 02:00:00 2027 UT = Sun Feb 7 02:00:00 2027 +00 Sun Mar 14 01:59:59 2027 UT = Sun Mar 14 01:59:59 2027 +00 Sun Mar 14 02:00:00 2027 UT = Sun Mar 14 03:00:00 2027 +01 Sun Jan 23 01:59:59 2028 UT = Sun Jan 23 02:59:59 2028 +01 Sun Jan 23 02:00:00 2028 UT = Sun Jan 23 02:00:00 2028 +00 Sun Mar 5 01:59:59 2028 UT = Sun Mar 5 01:59:59 2028 +00 Sun Mar 5 02:00:00 2028 UT = Sun Mar 5 03:00:00 2028 +01 Sun Jan 14 01:59:59 2029 UT = Sun Jan 14 02:59:59 2029 +01 Sun Jan 14 02:00:00 2029 UT = Sun Jan 14 02:00:00 2029 +00 Sun Feb 18 01:59:59 2029 UT = Sun Feb 18 01:59:59 2029 +00 Sun Feb 18 02:00:00 2029 UT = Sun Feb 18 03:00:00 2029 +01 Sun Dec 30 01:59:59 2029 UT = Sun Dec 30 02:59:59 2029 +01 Sun Dec 30 02:00:00 2029 UT = Sun Dec 30 02:00:00 2029 +00 Sun Feb 10 01:59:59 2030 UT = Sun Feb 10 01:59:59 2030 +00 Sun Feb 10 02:00:00 2030 UT = Sun Feb 10 03:00:00 2030 +01 Sun Dec 22 01:59:59 2030 UT = Sun Dec 22 02:59:59 2030 +01 Sun Dec 22 02:00:00 2030 UT = Sun Dec 22 02:00:00 2030 +00

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United States Senate reintroduced Sunshine Protection Act, enabling Permanent DST
by Phake Nick 14 Nov '22

14 Nov '22

I don't quite understand the legal text of the bill itself [2], but according to my reading, it seems like the bill will end DST across the entire US by shifting the standard time forward an hour, except in states/territories/area that currently doesn't enact DST, which they can choose to follow the new standard time or old standard time? 1: https://www.rubio.senate.gov/public/index.cfm/2021/3/rubio-colleagues-reint… 2: https://www.rubio.senate.gov/public/_cache/files/d34c77c0-acea-4074-bc57-14…

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Re: [tz] Change Request: Europe/Kiev to Europe/Kyiv
by John Hawkinson 18 Mar '22

18 Mar '22

I do not think we have handled this well; we have not given Victor Perov a good answer. Indeed, to some extent we've made it a "runaround." We can do better. We should take the time to write up a good lengthy explanation of the issues ("boilerplate"), because this a really important issue of concern to many people in the world and the project has indeed thought about it pretty carefully. Dismissing the inquiries because they are repetitive makes it seem like we haven't, and that unnecessarily upsets peopl. Victor Perev: I don't have time for a full write-up right now, but please consult the archives of the tz list (http://mm.icann.org/pipermail/tz/ or perhaps https://www.google.com/search?q=site%3Amm.icann.org%2Fpipermail%2Ftz%2F+kyiv which returns 203 results). The tz project is very conservative in its judgment for when the predominant English spelling of a city has changed, and so far the project has judged that Kiev is still preferred. We discussed it when major English newspapers and style guides changed from Kiev to Kyiv last year (prompted by the US presidential impeachment, which lead to a lot of discussion about Kyiv in America), and we will probably continue to discuss it as time goes on. But we've thought about it and discussed it a lot. The answers you got don't explain that, and that means we have not done a good a job as we should have. Sorry about that. In particular, I think Brian Inglis's answer was actually incorrect in a way that really matters ("Kiev is the correct English spelling"). There are multiple correct English spellings. It used to be that Kiev was the only one, but Kyiv is gaining popularity more and more. Paul Eggert <eggert(a)cs.ucla.edu> wrote on Sat, 15 Aug 2020 at 18:19:08 EDT in <cefc7f01-a3e9-f2a4-9ab9-5288147f994a(a)cs.ucla.edu>: > Thanks for bringing that to the mailing list (if I could shut off GitHub > pull requests I would). Although you cannot do so, we can handle them a little bit better. Please see https://docs.github.com/en/github/building-a-strong-community/creating-a-pu… You can create a template that explains to a would-be pull request submitter than pull requests will be closed and the project uses the mailing list for development discussions. ("I understand that the tz project does not use pull requests on github, and that if I enter a pull request here, it will be closed and I will be directed to send email to tz(a)iana.org.") For the particular case of regular, recurring issues, it may be worth while to keep one of #15, #26, and #27 open and mark the others as a duplicate of it, so that it is easier for newcomers to understand that this issue has been carefully considered and is not a simple oversight. https://github.com/eggert/tz/pulls?q=kiev Also, not to pick on Brian (again), but if the project policy is not to use github pull requests, it's not great to respond to pull requests on their substance, because it bifurcates the discussion and makes it seem like we actually do use pull requests ("except when we don't"). So what seems like a helpful thing may not be. -- jhawk(a)alum.mit.edu John Hawkinson

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Italy April 1944 discrepancy between comment and data
by Alois Treindl 05 Oct '21

05 Oct '21

For Italy in 1944 zone Europe/Rome there is a discrepancy between the comment and the data. comment: # From Paul Eggert (2016-10-27): # Go with INRiM for DST rules, except as corrected by Inglis for 1944 # for the Kingdom of Italy. This is consistent with Renzo Baldini. # Model Rome's occupation by using C-Eur rules from 1943-09-10 # to 1944-06-04; although Rome was an open city during this period, it # was effectively controlled by Germany. Data for Italy is Rule Italy 1944 only - Apr 2 2:00s 1:00 S Data for C-Eur is: Rule C-Eur 1944 1945 - Apr Mon>=1 2:00s 1:00 S where Mon>=1 in 1944 is April 3. So Rome is NOT following C-Eur. I think the rule for Itay is right, only the comment is misleading.

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Historical fix for Tonga
by Tim Parenti 13 Sep '21

13 Sep '21

First, a quick clerical patch: 0001, attached, fixes the placement of a comment which got shuffled around in the lead-up to publishing the changes for South Sudan in 2021a. Patch 0003 relates to Tonga, and comes from some of the links P Chan shared to 1957–1963 editions of The Air Almanac: https://mm.icann.org/pipermail/tz/2021-February/029866.html On Thu, 25 Feb 2021 at 03:43, P Chan <legco(a)outlook.com> wrote: > 1960 Nov (1962.1-4) > https://books.google.com/books?id=bVgtWM6kPZUC&pg=SL1-PA20 > 1961 Mar (1962.5-8) > https://books.google.com/books?id=W2nItAul4g0C&pg=SL1-PA20 When looking around at how this data was presented for other regions, I noticed on the preceding pages (listing "Places Fast on GMT", i.e., east of Greenwich) in some of the earlier editions provided that Tonga was listed at GMT+12:20. The peculiar offset stuck out, and I quickly noticed that some of the later editions of the same tables had it at GMT+13. A quick bisection puts the changeover, as far as The Air Almanac contemporaneously reckoned it, between November 1960 and March 1961. Previously, our data had Tonga transitioning to UT+13 in 1941 based on a quotation from a 1997 news article. Although this differs from what the Almanac suggests by some 20 years, the article does mention a change coincident with the New Year, and that Tāufaʻāhau Tupou IV was Crown Prince at the time. As his predecessor and mother, Queen Sālote Tupou III, reigned from 1918-04-05 to 1965-12-16, a possible transition of 1961-01-01 still jives with the gist of the article, even if the specific year was perhaps wrong or just misprinted. For what it's worth, our commentary already noted that Shanks & Pottenger had put the transition even later, at 1968-10-01. Although of course we don't know how they arrived at that date, given that they did, 1961 seems rather less out-of-place than it otherwise might. The attached patch 0003 makes this adjustment, while more fully documenting and comparing the conflicting sources. Thanks again to P Chan for pointing us to these resources. I wasn't expecting to get a "bonus" correction out of it, but one never knows quite what will catch the eye… -- Tim Parenti

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[PATCH 1/8] * tzfile.5: Fix prefix/suffix typo (thanks to Ian Abbott).
by Paul Eggert 13 Sep '21

13 Sep '21

--- tzfile.5 | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tzfile.5 b/tzfile.5 index b4952d5..ec78689 100644 --- a/tzfile.5 +++ b/tzfile.5 @@ -134,7 +134,7 @@ bytes that represent time zone designations, which are null-terminated byte strings, each indexed by the .B tt_desigidx values mentioned above. -The byte strings can overlap if one is a prefix of the other. +The byte strings can overlap if one is a suffix of the other. The encoding of these strings is not specified. .IP * .B tzh_leapcnt -- 2.27.0

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FW: [Ext] The TZ Coordination
by Naela Sarras 02 Apr '21

02 Apr '21

Dear Paul, Please see the note below from our colleagues in Morocco regarding the upcoming timezone change for Morocco. Best regards, Naela Naela Sarras Director, IANA Operations ICANN From: EL MAAYATI Afaf <afaf(a)anrt.ma> Date: Wednesday, May 27, 2020 at 12:01 PM To: Naela Sarras <naela.sarras(a)iana.org> Cc: BENLEMLIH Hamida <benlemlih(a)anrt.ma> Subject: [Ext] The TZ Coordination Dear Naela, I hope this email finds you well, safe and healthy. Actually, I have a request concerning the configuration of the Time-Zone for Morocco. In the Database file: ftp://ftp.iana.org/tz/tzdb-2020a/africa, it’s mentionned that a program will be running to implement the transition dates: [cid:image001.jpg@01D6342E.01C70B10] Currently we are implementing GMT and we will move to GMT+1 next Sunday, May 31. So, if possible, would you please help to get in touch with Mr. Paul Eggert, in order to have the procedure to notify IANA officially, from a governmental source, with the changes of TZ in Morocco. Thank you in advance for your feedback and for your habitual support. Best Regards, Afaf ________________________________ Ce message, son contenu et toutes les pièces jointes sont adressés à l'attention exclusive de leur (s) destinataire (s) et sont strictement confidentiels : ils relèvent de la correspondance privée. Toute publication, utilisation ou diffusion, même partielle, par des personnes autres que les destinataires est interdite et doit être autorisée par l'Agence Nationale de Règlementation des Télécommunications (ANRT, Royaume du Maroc). Si vous recevez ce message par erreur, nous vous prions de le détruire après en avoir informé son expéditeur sans délai. L’ANRT décline toute responsabilité pour toute altération, déformation ou falsification subi par le message et ses pièces jointes au cours de leur transmission. Retrouvez toutes les informations de l’ANRT sur son site Web à l’adresse suivante : http://www.anrt.ma. ________________________________ This message, its content and its attachments are intended for the exclusive use of the named addressee (s) and are strictly confidential. Any copy or other use of this information by persons or entities other than the intended recipient is prohibited and should be authorized by the National Agency of Telecommunications Regulation (ANRT, Morocco). If you have received this communication in error, please delete the material and notify the sender. The ANRT accepts no liability for any alteration, distortion or falsification that may occur during the transmission of this message. All information about ANRT can be found on our website at the following address http://www.anrt.ma. ________________________________ إن هذه الرسالة ومحتواها ومرفقاتها موجهة خصيصا للشخص المرسل إليه وتعتبر سرية وتصنف ضمن خانة المراسلات ذات طبيعة شخصية. ويمنع منعا كليا نشر أو استعمال أو بث، ولو بطريقة جزئية، لهذه الرسالة من طرف أشخاص غير المرسل إليهم ما لم يتم الترخيص بذلك من طرف الوكالة الوطنية لتقنين المواصلات (المملكة المغربية. في حالة ما إذا توصلتم هذه الرسالة عن طريق الخطأ، يرجى منكم العمل على إتلافها فورا بعد إخبار الشخص المرسل إليه بذلك. ولا تتحمل الوكالة الوطنية لتقنين المواصلات أي مسؤولية عن أي تحريف أو تغيير أو تزييف قد يلحق بمحتوى الرسالة أو بمرفقاتها خلال عملية الإرسال. للمزيد من المعلومات، يرجى الاطلاع على الموقع الإلكتروني للوكالة الوطنية لتقنين المواصلات : http://www.anrt.ma.

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Relation between Time Zone Abbreviation and Offset in Asia
by Evgheni Antropov 30 Mar '21

30 Mar '21

Dear Tzdata Maintainers, Is it historically appeared in Asia, that several Locations have Offset only instead of Time Zone Abbreviation? I mean next location: Bangkok<https://www.timeanddate.com/time/zone/thailand/bangkok> from Thailand<https://www.timeanddate.com/time/zone/thailand> which is related with Vientiane<https://www.timeanddate.com/time/zone/laos/vientiane> from Laos<https://www.timeanddate.com/time/zone/laos> and Phnom Penh<https://www.timeanddate.com/time/zone/cambodia/phnom-penh> from Cambodia<https://www.timeanddate.com/time/zone/cambodia> - all of them is in Indochina Time<https://www.timeanddate.com/time/zones/ict>, but in repository for file asia they have only offset: https://github.com/eggert/tz/blob/main/asia#L3823 I don't know is it issue or typo, cause I didn't find any info when this Abbreviation was added https://en.wikipedia.org/wiki/UTC%2B07:00 For our customers, I added this step before compiling tzdata sources: # set Asia/Bangkok for Thailand to use name instead of digits in timezone, affecting on Asia/Vientiane for Laos and Asia/Phnom_Penh for Cambodia sed -i -e '/# Thailand/,/Vientiane/s/+07/ICT/' $(pwd)/asia but maybe it doesn't require and you will add corresponding changes in the main source code. BTW, during my investigation, I observed that several time zones have same behavior, ex.: Tajikistan<timeanddate.com/time/zone/tajikistan> - Asia/Dushanbe<https://www.timeanddate.com/time/zone/tajikistan/dushanbe> - TJT - Tajikistan Time<https://www.timeanddate.com/time/zones/tjt> https://github.com/eggert/tz/blob/main/asia#L3817 Turkmenistan<https://www.timeanddate.com/time/zone/turkmenistan> - Asia/Ashgabat<https://www.timeanddate.com/time/zone/turkmenistan/ashgabat> - TMT - Turkmenistan Time<https://www.timeanddate.com/time/zones/tmt> https://github.com/eggert/tz/blob/main/asia#L3834 United Arab Emirates<https://www.timeanddate.com/time/zone/united-arab-emirates> - Asia/Dubai<https://www.timeanddate.com/time/zone/united-arab-emirates/dubai> - GST - Gulf Standard Time<https://www.timeanddate.com/time/zones/gst> https://github.com/eggert/tz/blob/main/asia#L3839 Uzbekistan - Asia/Samarkand | Asia/Tashkent - UZT - Uzbekistan Time<https://www.timeanddate.com/time/zones/uzt> https://github.com/eggert/tz/blob/main/asia#L3851 Vietnam - Asia/Ho_Chi_Minh - ICT - Indochina Time<https://www.timeanddate.com/time/zones/ict> https://github.com/eggert/tz/blob/main/asia#L3920 Sri Lanka - Asia/Colombo - IST - India Standard Time<https://www.timeanddate.com/time/zones/ist> https://github.com/eggert/tz/blob/main/asia#L3645 Singapore - Asia/Singapore - SGT - Singapore Time<https://www.timeanddate.com/time/zones/sgt> https://github.com/eggert/tz/blob/main/asia#L3581 Saudi Arabia - Asia/Riyadh - AST - Arabia Standard Time<https://www.timeanddate.com/time/zones/ast-arabia> https://github.com/eggert/tz/blob/main/asia#L3565 Qatar - Asia/Qatar - AST - Arabia Standard Time<https://www.timeanddate.com/time/zones/ast-arabia> https://github.com/eggert/tz/blob/main/asia#L3518 Please give me explanation of this, is it correct to use Offset instead of Abbreviation or it will be fixed in future? Best regards, [cid:image001.jpg@01D72579.B94CFD20] Evgheni Antropov Software R&D Engineer +373 22 404 665 www.addgrup.com<http://www.addgrup.com/>

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[PATCH] Update Crimea country codes in line with UN A/RES/73/263
by Dimitri John Ledkov 26 Mar '21

26 Mar '21

"the Autonomous Republic of Crimea and the city of Sevastopol, Ukraine, temporarily occupied by the Russian Federation" is the preffered way to refer to the Crimean Peninsula as called upon by the A/RES/73/263 point 11. [1] Unfortunately there is no two letter country code to state precisely that. For internet & computer users however whenever any locale & location is derived from the zone.tab & zone1970.tab file formats results in most appropriate UX with a temporary RU country code. [1] https://www.un.org/en/ga/search/view_doc.asp?symbol=A/RES/73/263 Note, that it is best read in conjuction with resolutions from previous and subsequent sessions. I.e. https://www.un.org/en/ga/search/view_doc.asp?symbol=A/RES/68/262 https://www.un.org/en/ga/search/view_doc.asp?symbol=A/RES/71/205 https://www.un.org/en/ga/search/view_doc.asp?symbol=A/RES/72/190 https://www.un.org/en/ga/search/view_doc.asp?symbol=A/RES/73/194 https://www.un.org/en/ga/search/view_doc.asp?symbol=A/RES/73/263 https://www.un.org/en/ga/search/view_doc.asp?symbol=A/RES/74/17 https://www.un.org/en/ga/search/view_doc.asp?symbol=A/RES/75/29 Signed-off-by: Dimitri John Ledkov <xnox(a)ubuntu.com> --- Users from the Crimean Pensinsula are reporting issues when using computer systems. Many pieces of software derive and display location/country based on the zone.tab file format which doesn't reflect the widely internationally acknowledged (as ratified by UN general assembly resolutions) temporary occupation of the pensinsula by the Russian Federation. Currently, the currency in use is rubles; telephone country codes switch to +7, with old ones defunct; MasterCard/Visa networks replaced by MIR network; car license plates are issues with Russian area codes; local government *.gov.ua websites are defunct, replaced with *.gov.ru, e.g. https://sev.gov.ua/ => https://sev.gov.ru/; and so on. As this issue is causing distress to the users of the Internet, I hope that this proposed temporary updated could be included in the tzdata update. zone.tab | 8 ++++---- zone1970.tab | 6 ++++-- 2 files changed, 8 insertions(+), 6 deletions(-) diff --git a/zone.tab b/zone.tab index 14fceb9..35e2493 100644 --- a/zone.tab +++ b/zone.tab @@ -331,10 +331,10 @@ RO +4426+02606 Europe/Bucharest RS +4450+02030 Europe/Belgrade RU +5443+02030 Europe/Kaliningrad MSK-01 - Kaliningrad RU +554521+0373704 Europe/Moscow MSK+00 - Moscow area -# The obsolescent zone.tab format cannot represent Europe/Simferopol well. -# Put it in RU section and list as UA. See "territorial claims" above. -# Programs should use zone1970.tab instead; see above. -UA +4457+03406 Europe/Simferopol Crimea +# "the Autonomous Republic of Crimea and the city of Sevastopol, Ukraine, +# temporarily occupied by the Russian Federation" +# Temporarily list as RU. See "territorial claims" above. +RU +4457+03406 Europe/Simferopol Crimea RU +5836+04939 Europe/Kirov MSK+00 - Kirov RU +4844+04425 Europe/Volgograd MSK+00 - Volgograd RU +4621+04803 Europe/Astrakhan MSK+01 - Astrakhan diff --git a/zone1970.tab b/zone1970.tab index ddb2321..d699388 100644 --- a/zone1970.tab +++ b/zone1970.tab @@ -288,8 +288,10 @@ RO +4426+02606 Europe/Bucharest RS,BA,HR,ME,MK,SI +4450+02030 Europe/Belgrade RU +5443+02030 Europe/Kaliningrad MSK-01 - Kaliningrad RU +554521+0373704 Europe/Moscow MSK+00 - Moscow area -# Mention RU and UA alphabetically. See "territorial claims" above. -RU,UA +4457+03406 Europe/Simferopol Crimea +# "the Autonomous Republic of Crimea and the city of Sevastopol, Ukraine, +# temporarily occupied by the Russian Federation" +# Temporarily list as RU. See "territorial claims" above. +RU +4457+03406 Europe/Simferopol Crimea RU +5836+04939 Europe/Kirov MSK+00 - Kirov RU +4844+04425 Europe/Volgograd MSK+00 - Volgograd RU +4621+04803 Europe/Astrakhan MSK+01 - Astrakhan -- 2.27.0

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time zone history for the Cook Islands - Christmas Day Act 1899
by wtz＠worldtimezone.com 25 Mar '21

25 Mar '21

Cook Islands changed its date from the west (Asia, New Zealand, Australia) side to the east (American) side on Christmas day 1899. In 1899 the Cook Islands celebrated Christmas twice to correct the calendar. According to the old books, missionaries were unaware of the International Date line, when they came from Sydney. Thus the Cook Islands were one day ahead. ".... The Christmas Day Act was designed to change the time to that of Tahiti and all other civilised places east of the 180th degree of longitude: it is a measure that has been strongly opposed by the Maoris on previous occasions ..." (Lieut-Colonel Gudgeon, 14 Sep, 1899) See references below: Discoverers of the Cook Islands and the Names They Gave (Victoria University of Wellington) Christmas Day Act 1899 http://nzetc.victoria.ac.nz/tm/scholarly/tei-KloDisc-t1-body-d18.html (page 60) PACIFIC ISLANDS. PROCEEDINGS OF THE BRITISH RESIDENT, RAROTONGA. (National Library of New Zealand) Appendix to the Journals of the House of Representatives, 1900 https://atojs.natlib.govt.nz/cgi-bin/atojs?a=d&d=AJHR1900-I.2.1.2.3 (page 20) I guess, Zone Pacific/Rarotonga was +13:20:56 before Christmas 1899 and on Christmas Day 1899 time zone has been changed to -10:39:04 (text Christmas Day Act 1899 on our web site): https://www.worldtimezone.com/dst_news/dst_news_cook-islands01.html (or Christmas Day Act 1899 screenshot): https://www.worldtimezone.com/images/1899-cook-island.gif Regards, Alexander Krivenyshev, https://www.worldtimezone.com

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