Egypt daylight savings will be back
Hello, Egypt officially announced today that daylight savings will be applied from last Friday of April to last Thursday of October. https://www.mena.org.eg/ar/news/dbcall/table/textnews/id/10044253#:~:text=20... .
On 2023-03-01 03:56, Ahmad ElDardiry via tz wrote:
Egypt officially announced today that daylight savings will be applied from last Friday of April to last Thursday of October.
Thanks for the heads-up. We'll need a new TZDB release some time fairly soon, since our current prediction for Egypt will be wrong starting April 28. Google Translate suggests that the announcement doesn't specify transition times. The attached proposed patch assumes the transition time is 00:00 in spring (i.e., the start of April's last Friday) and 24:00 in fall (i.e., the end of October's last Thursday.) Does that sound right to you?
No problem! I'm sorry I'm not familiar with the 24h format, but basically 12am Apr 28 would be advanced 1 hour, and this would last till October 26. More here: https://www.timeanddate.com/time/change/egypt/cairo On Wed, Mar 1, 2023 at 10:20 PM Paul Eggert <eggert@cs.ucla.edu> wrote:
On 2023-03-01 03:56, Ahmad ElDardiry via tz wrote:
Egypt officially announced today that daylight savings will be applied from last Friday of April to last Thursday of October.
Thanks for the heads-up. We'll need a new TZDB release some time fairly soon, since our current prediction for Egypt will be wrong starting April 28.
Google Translate suggests that the announcement doesn't specify transition times. The attached proposed patch assumes the transition time is 00:00 in spring (i.e., the start of April's last Friday) and 24:00 in fall (i.e., the end of October's last Thursday.) Does that sound right to you?
On 3/1/23 14:33, Ahmad ElDardiry wrote:
I'm sorry I'm not familiar with the 24h format, but basically 12am Apr 28 would be advanced 1 hour, and this would last till October 26.
"00:00" means midnight at the start of the day, and "24:00" means midnight at the end of the day. This avoids the ambiguity of "12am" which can mean either noon or midnight depending on who you're talking to. With the proposed patch, the output of the shell command 'zdump -V -c2022,2025 Africa/Cairo | sed "s,Africa/Cairo,,; s, isdst.*,,"' would be the following. Does this look correct to you for clocks in Egypt? Thu Apr 27 21:59:59 2023 UT = Thu Apr 27 23:59:59 2023 EET Thu Apr 27 22:00:00 2023 UT = Fri Apr 28 01:00:00 2023 EEST Thu Oct 26 20:59:59 2023 UT = Thu Oct 26 23:59:59 2023 EEST Thu Oct 26 21:00:00 2023 UT = Thu Oct 26 23:00:00 2023 EET Thu Apr 25 21:59:59 2024 UT = Thu Apr 25 23:59:59 2024 EET Thu Apr 25 22:00:00 2024 UT = Fri Apr 26 01:00:00 2024 EEST Thu Oct 31 20:59:59 2024 UT = Thu Oct 31 23:59:59 2024 EEST Thu Oct 31 21:00:00 2024 UT = Thu Oct 31 23:00:00 2024 EET In the above, "UT" is Universal Time (i.e., GMT), "EET" is eastern European time, and "EEST" is eastern European summer time. "23:59:59" is one second before midnight at the end of the day, "01:00:00" is 1am, and "23:00:00" is 11pm.
2023-03-01 21:20 skrev Paul Eggert via tz:
Thanks for the heads-up. We'll need a new TZDB release some time fairly soon, since our current prediction for Egypt will be wrong starting April 28.
The patch in dcd8cbed23201416cbd3bbf43f669737693282d7 uses "Max" as the end date for Egypt's fall back, all other rules in all other files use "max". zic.c is case-insensitive, but it could be good to be consistent just in case there is are some broken downstream tools are not. -- \\// Peter - http://www.softwolves.pp.se/
I guess it is. I'm sorry I meant the format of the file you sent. I'm not expert in the database and how it works. I just wanted to notify you guys as soon as possible as I know as a web developer how much this affects the internet business. Thanks a lot, much appreciated! On Thu, Mar 2, 2023, 12:03 PM Paul Eggert via tz <tz@iana.org> wrote:
Thanks, I installed the attached.
participants (3)
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Ahmad ElDardiry -
Paul Eggert -
Peter Krefting