November 2023 - tz - lists.iana.org

Did Greenland abolish daylight saving from 2024 on?
by Paul Eggert Nov. 20, 2023

Nov. 20, 2023

This week several English-language news sources reported that Greenland has moved its clocks forward for the last time. These reports disagree with current TZDB[1], which follows Thomas M. Steenholdt's December email[2] saying that although in November Greenlanders voted to not fall back this fall, they also voted to continue to observe daylight saving time (DST) next year, effectively moving their time zone one hour east instead of abolishing DST. There's no disagreement about timekeeping this year. The first point of disagreement is March 30, 2024 at 23:00, when TZDB says Nuuk, Greenland will spring forward to 24:00, whereas the recent news reports say clocks will neither spring forward nor fall back during 2024. So who's right: Steenholdt in December, or these several recent news reports? Currently TZDB goes with Steenholdt. After all, he cited the relevant Greenland legislation and his email address ends in ".gl". I suppose another possibility, though, is that Greenland's government has changed its mind since November. However, if so I'd like to see citations to the newer legislation. The earliest recent news story I found on this topic was a week ago by Lebawit Lily Girma[3], senior travel news reporter for Bloomberg Pursuits. I'm taking the liberty of bcc'ing Girma to see if she can help get to the bottom of the situation. [1]: https://iana.org/tz [2]: https://mm.icann.org/pipermail/tz/2022-December/032402.html [3]: Girma LL. Greenland Solves the Daylight Saving Time Debate. Bloomberg. 2023-03-24. https://www.bloomberg.com/news/articles/2023-03-24/greenland-keeps-daylight… Here are some of the other news reports I found. Greenland to stay in daylight saving time forever. AP. 2023-03-27. https://apnews.com/article/greenland-daylight-saving-summertime-utc-gmt-3b5… Martin M. Greenland is keeping daylight saving time permanently. NPR. 2023-03-28. https://www.wunc.org/2023-03-28/greenland-is-keeping-daylight-saving-time-p… Selcho M. Here’s why Greenland is permanently keeping daylight saving time. Deseret News. 2023-03-28. https://www.deseret.com/u-s-world/2023/3/28/23660379/why-greenland-keeping-… Jerusalem Post staff. Greenland changed their clocks to daylight savings for the last time. Jerusalem Post. 2023-03-29. https://www.jpost.com/international/article-735751 Carpineti A. Greenland Has Changed Its Clocks For The Last Time, Embracing Daylight Savings Forever. IFLScience. 2023-03-29. https://www.iflscience.com/greenland-has-changed-its-clocks-for-the-last-ti…

16 48

make error
by Alois Treindl Nov. 20, 2023

Nov. 20, 2023

I just made a new clone of tz. I work normally on RHEL 7 (redhat enterprise Linux) with gcc version 4.8.5 20150623 (Red Hat 4.8.5-44) (GCC) When I say make or make all, I get something I never observed before: cc -DTZDIR='"/usr/share/zoneinfo"' -c -o zic.o zic.c In file included from zic.c:16:0: private.h:791:60: error: conflicting types for ‘restrict’ struct tm *localtime_rz(timezone_t restrict, time_t const *restrict, ^ private.h:791:36: note: previous definition of ‘restrict’ was here struct tm *localtime_rz(timezone_t restrict, time_t const *restrict, ^ private.h:792:15: error: conflicting types for ‘restrict’ struct tm *restrict); ^ private.h:791:60: note: previous definition of ‘restrict’ was here struct tm *localtime_rz(timezone_t restrict, time_t const *restrict, ^ private.h:793:49: error: conflicting types for ‘restrict’ time_t mktime_z(timezone_t restrict, struct tm *restrict); ^ private.h:793:28: note: previous definition of ‘restrict’ was here time_t mktime_z(timezone_t restrict, struct tm *restrict); This does not happen when I compile on RHEL 9 gcc version 11.4.1 20230605 (Red Hat 11.4.1-2) (GCC) Can anyone point me to a fix?

7 17

[PROPOSED 1/5] * tz-link.html: Minor tweaks to citations.
by Paul Eggert Nov. 19, 2023

Nov. 19, 2023

--- tz-link.html | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/tz-link.html b/tz-link.html index a29231d5..84bea935 100644 --- a/tz-link.html +++ b/tz-link.html @@ -994,9 +994,9 @@ are larger for countries farther away from the equator, while subtropical regions consume more electricity because of <abbr>DST</abbr>."</li> <li>Malow BA. It is time to abolish the clock change and adopt permanent standard time in the United States: a Sleep Research Society position statement. -Sleep. 2022;45(12):zsac236. +Sleep. 2022;45(12):zsac236. doi:<a href="https://doi.org/10.1093/sleep/zsac236">10.1093/sleep/zsac236</a>. -After reviewing of the scientific literature, the Sleep Research Society +After reviewing the scientific literature, the Sleep Research Society advocates permanent standard time due to its health benefits. <li>Rishi MA, Cheng JY, Strang AR et al. <a href="https://jcsm.aasm.org/doi/10.5664/jcsm.10898">Permanent standard time @@ -1004,15 +1004,15 @@ is the optimal choice for health and safety: an American Academy of Sleep Medicine position statement</a>. J Clin Sleep Med. 2023-10-31. doi:<a href="https://doi.org/10.5664/jcsm.10898">10.5664/jcsm.10898</a>. -This argues for permanent standard time due to health and safety risks +The AASM argues for permanent standard time due to health and safety risks and economic costs of both <abbr>DST</abbr> transitions and permanent <abbr>DST</abbr>.</li> <li>Roenneberg T, Wirz-Justice A, Skene DJ et al. <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7205184/">Why should we abolish Daylight Saving Time?</a> -J Biol Rhythms. 2019;34(3):227–230. +J Biol Rhythms. 2019;34(3):227–230. doi:<a href="https://doi.org/10.1177/0748730419854197">10.1177/0748730419854197</a>. -This position paper of the Society for Research on Biological Rhythms +The Society for Research on Biological Rhythms opposes DST changes and permanent DST, and advocates that governments adopt "permanent Standard Time for the health and safety of their citizens".</li> </ul> -- 2.40.1

1 4

building on Windows
by David Stiff Nov. 15, 2023

Nov. 15, 2023

Hello, would you be able to advise on building tz on Windows? Is there a Windows makefile? Thanks! Dave Stiff Wolfram Research

2 3

Time zone of Iceland in Africa?
by tz＠schwilli.at Nov. 14, 2023

Nov. 14, 2023

Hi, I would expect to find the time zone of Iceland/Reykjavik in Europe or Atlantic Ocean but it is in Africa: ------------------------ # tzselect Please identify a location so that time zone rules can be set correctly. Please select a continent, ocean, "coord", or "TZ". 1) Africa 2) Americas 3) Antarctica 4) Asia 5) Atlantic Ocean 6) Australia 7) Europe 8) Indian Ocean 9) Pacific Ocean 10) coord - I want to use geographical coordinates. 11) TZ - I want to specify the timezone using the Posix TZ format. #? 1 Please select a country whose clocks agree with yours. 1) Algeria 20) Gabon 39) Nigeria 2) Angola 21) Gambia 40) Rwanda 3) Benin 22) Ghana 41) Sao Tome & Principe 4) Botswana 23) Guinea 42) Senegal 5) Burkina Faso 24) Guinea-Bissau 43) Sierra Leone 6) Burundi 25) Iceland 44) Somalia 7) Cameroon 26) Kenya 45) South Africa 8) Central African Rep. 27) Lesotho 46) South Sudan 9) Chad 28) Liberia 47) Spain 10) Comoros 29) Libya 48) St Helena 11) Congo (Dem. Rep.) 30) Madagascar 49) Sudan 12) Congo (Rep.) 31) Malawi 50) Tanzania 13) Côte d'Ivoire 32) Mali 51) Togo 14) Djibouti 33) Mauritania 52) Tunisia 15) Egypt 34) Mayotte 53) Uganda 16) Equatorial Guinea 35) Morocco 54) Western Sahara 17) Eritrea 36) Mozambique 55) Zambia 18) Eswatini (Swaziland) 37) Namibia 56) Zimbabwe 19) Ethiopia 38) Niger #? 25 The following information has been given: Iceland Therefore TZ='Africa/Abidjan' will be used. Selected time is now: Fri Sep 15 05:44:06 GMT 2023. Universal Time is now: Fri Sep 15 05:44:06 UTC 2023. Is the above information OK? 1) Yes 2) No #? 1 You can make this change permanent for yourself by appending the line TZ='Africa/Abidjan'; export TZ to the file '.profile' in your home directory; then log out and log in again. Here is that TZ value again, this time on standard output so that you can use the /usr/bin/tzselect command in shell scripts: Africa/Abidjan ------------------------ Why is it mapped to 'Africa/Abidjan'? # tzselect --version tzselect (GNU libc) 2.35 release of tz code and data: 2023c Thx, Reinhard

8 14

Request for Standardization of Kyiv Time Zone Naming
by Dmytro Shynkarenko Nov. 11, 2023

Nov. 11, 2023

Dear IANA Team, I'm reaching out on behalf of our team at Tutorpeers (Tutorpeers.com) I'm reaching out to address a significant concern related to the naming of Ukraine's capital in time zone databases. At present, there are two spellings in use: "Kiev" and "Kyiv." The latter, "Kyiv," is the correct Ukrainian spelling and pronunciation, which honors the country's sovereignty and the preferences of its people. The use of "Kiev," which is derived from the Russian language, has become increasingly problematic, especially considering Russia's ongoing aggression against Ukraine. This issue hits close to home for me, not only because of my Ukrainian roots but also due to the feedback we've received from our Ukrainian user base. Numerous customers have reached out to us, expressing discomfort and disapproval of the "Kiev" spelling, given the current circumstances. Our platform has taken a clear stance on this issue, and we urge IANA to consider the implications of language and to update its time zone databases accordingly. By standardizing the "Kyiv" spelling, we can collectively show support for the Ukrainian community and respect their cultural and national identity. After speaking to your colleague Candice Montoya I was pleased to learn that the spelling change to "Europe/Kyiv" has already been implemented in the Time Zone Database as of August 2022. This update is much appreciated and reflects a positive and respectful acknowledgment of the correct naming convention. However, I've noticed that the previous spelling, "Kiev" still appears in some instances. Please confirm if this is intended for backward compatibility with existing systems. And if so, is there a planned timeline for its eventual deprecation in favor of the updated "Kyiv" spelling? Understanding the strategy for phasing out the old spelling would be incredibly helpful for our team and user community as we navigate these changes and ensure we provide the most current and accurate information. Thank you once again for your attention to this matter. Regards, Dmytro Project Coordinator at Tutorpeers

4 3

Error for Chile on September 2023
by Jacqueline Seron Nov. 7, 2023

Nov. 7, 2023

Hello On September 2023, Chile changed the date for DST from September 3rd to September 11th. I do not see this change in the database. See the government webpage that indicated this change https://horaoficial.cl/CambioHusoHorario.php Thank you -- Jacqueline Seron N. NOIRLab - AURA

8 16

[PROPOSED] Update AASM citation to 2023
by Paul Eggert Nov. 1, 2023

Nov. 1, 2023

* tz-link.html (Costs and benefits of time shifts): Link to 2023 edition of the American Academy of Sleep Medicine position statement. --- tz-link.html | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/tz-link.html b/tz-link.html index 19740b11..a29231d5 100644 --- a/tz-link.html +++ b/tz-link.html @@ -998,13 +998,15 @@ standard time in the United States: a Sleep Research Society position statement. doi:<a href="https://doi.org/10.1093/sleep/zsac236">10.1093/sleep/zsac236</a>. After reviewing of the scientific literature, the Sleep Research Society advocates permanent standard time due to its health benefits. -<li>Rishi MA, Ahmed O, Barrantes Perez JH et al. -<a href="https://jcsm.aasm.org/doi/10.5664/jcsm.8780">Daylight saving time: +<li>Rishi MA, Cheng JY, Strang AR et al. +<a href="https://jcsm.aasm.org/doi/10.5664/jcsm.10898">Permanent standard time +is the optimal choice for health and safety: an American Academy of Sleep Medicine position statement</a>. -J Clin Sleep Med. 2020;16(10):1781–1784. -doi:<a href="https://doi.org/10.5664/jcsm.8780">10.5664/jcsm.8780</a>. -This argues for permanent standard time due to health risks of both -<abbr>DST</abbr> transitions and permanent <abbr>DST</abbr>.</li> +J Clin Sleep Med. 2023-10-31. +doi:<a href="https://doi.org/10.5664/jcsm.10898">10.5664/jcsm.10898</a>. +This argues for permanent standard time due to health and safety risks +and economic costs of both <abbr>DST</abbr> transitions and +permanent <abbr>DST</abbr>.</li> <li>Roenneberg T, Wirz-Justice A, Skene DJ et al. <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7205184/">Why should we abolish Daylight Saving Time?</a> -- 2.41.0

1 0