Time Zone Changes in 2023

Ahmad ElDardiry (2023-03-01):

Egypt officially announced today that daylight savings will be
applied from last Friday of April to last Thursday of October.

Attached to: Egypt (africa)

Paul Eggert (2023-03-01):

Assume transitions are at 00:00 and 24:00 respectively.

Attached to: Egypt (africa)

Amir Adib (2023-03-07):

https://www.facebook.com/EgyptianCabinet/posts/638829614954129/

Attached to: Egypt (africa)

Milamber (2023-03-14, 2023-03-15):

The return to legal GMT time will take place this Sunday, March 19 at 3 a.m.
... the return to GMT+1 will be made on Sunday April 23, 2023 at 2 a.m.
https://www.mmsp.gov.ma/fr/actualites/passage-à-l%E2%80%99heure-gmt-à-partir-du-dimanche-19-mars-2023

Attached to: Morocco (africa)

Paul Eggert (2023-12-20):

Transitions from 2021 on are taken from:
https://www.timeanddate.com/time/zone/antarctica/casey
retrieved at various dates.

Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]

Attached to: Antarctica/Casey (antarctica)

Zakhary V. Akulov (2023-12-17 22:00:48 +0700):

... from December, 18, 2023 00:00 by my decision the local time of
the Antarctic research base Vostok will correspond to UTC+5.
(2023-12-19): We constantly interact with Progress base, with company who
builds new wintering station, with sledge convoys, with aviation - they all
use UTC+5. Besides, difference between Moscow time is just 2 hours now, not 4.
(2023-12-19, in response to the question "Has local time at Vostok
been UTC+6 ever since 1957, or has it changed before?"): No. At least
since my antarctic career start, 10 years ago, Vostok base has UTC+7.
(In response to a 2023-12-18 question "from 02:00 to 00:00 today"): This.

Attached to: Antarctica/Vostok (antarctica)

Paul Eggert (2023-12-18):

For lack of better info, guess Vostok was at +07 from founding through today,
except when closed.

Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]

Attached to: Antarctica/Vostok (antarctica)

Saadallah Itani (2023-03-23):

Lebanon ... announced today delay of Spring forward from March 25 to April 20.

Attached to: Lebanon (asia)

Paul Eggert (2023-03-27):

This announcement was by the Lebanese caretaker prime minister Najib Mikati.
https://www.mtv.com.lb/en/News/Local/1352516/lebanon-postpones-daylight-saving-time-adoption
A video was later leaked to the media of parliament speaker Nabih Berri
asking Mikati to postpone DST to aid observance of Ramadan, Mikati objecting
that this would cause problems such as scheduling airline flights, to which
Berri interjected, "What flights?"

The change was controversial and led to a partly-sectarian divide.
Many Lebanese institutions, including the education ministry, the Maronite
church, and two news channels LCBI and MTV, ignored the announcement and
went ahead with the long-scheduled spring-forward on March 25/26, some
arguing that the prime minister had not followed the law because the change
had not been approved by the cabinet.  Google went with the announcement;
Apple ignored it.  At least one bank followed the announcement for its doors,
but ignored the announcement in internal computer systems.
Beirut international airport listed two times for each departure.
Dan Azzi wrote "My view is that this whole thing is a Dumb and Dumber movie."
Eventually the prime minister backed down, said the cabinet had decided to
stick with its 1998 decision, and that DST would begin midnight March 29/30.
https://www.nna-leb.gov.lb/en/miscellaneous/604093/lebanon-has-two-times-of-day-amid-daylight-savings
https://www.cnbc.com/2023/03/27/lebanon-in-two-different-time-zones-as-government-disagrees-on-daylight-savings.html

Although we could model the chaos with two Zones, that would likely cause
more trouble than it would cure.  Since so many manual clocks and
computer-based timestamps ignored the announcement, stick with official
cabinet resolutions in the data while recording the prime minister's
announcement as a comment.  This is how we treated a similar situation in
Rio de Janeiro in spring 1993.

Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S

Attached to: Lebanon (asia)

Heba Hamad (2023-03-22):

... summer time will begin in Palestine from Saturday 04-29-2023,
02:00 AM by 60 minutes forward.

Attached to: EgyptAsia (asia)

Heba Hemad (2023-10-09):

... winter time will begin in Palestine from Saturday 10-28-2023,
02:00 AM by 60 minutes back.

Attached to: EgyptAsia (asia)

Almaz Mingaleev (2023-10-06):

Cabinet approved the suspension of Daylight Saving and appropriate
legislative changes will be considered including the repeal of the
Daylight Saving Act 1998
https://www.fiji.gov.fj/Media-Centre/Speeches/English/CABINET-DECISIONS-3-OCTOBER-2023

Attached to: Fiji (australasia)

Paul Eggert (2023-10-06):

For now, assume DST is suspended indefinitely.

Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S

Attached to: Fiji (australasia)

Paul Eggert (2023-01-23):

Howse writes (p 153) "The Spaniards, on the other hand, reached the
Philippines and the Ladrones from America," and implies that the Ladrones
(now called the Marianas) kept American date for quite some time.
For now, we assume the Ladrones switched at the same time as the Philippines;
see Asia/Manila.

Use 1941-12-10 and 1944-07-31 for Guam WWII transitions, as the rough start
and end of Japanese control of Agana.  We don't know whether the Northern
Marianas followed Guam's DST rules from 1959 through 1977; for now, assume
they did as that avoids the need for a separate zone due to our 1970 cutoff.

US Public Law 106-564 (2000-12-23) made UT +10 the official standard time,
under the name "Chamorro standard time".  There is no official abbreviation,
but Congressman Robert A. Underwood, author of the bill that became law,
wrote in a press release (2000-12-27) that he will seek the use of "ChST".

See also the commentary for Micronesia.


Marshall Is
See the commentary for Micronesia.


Micronesia (and nearby)

Paul Eggert (2023-01-23):

The American Practical Navigator <https://msi.nga.mil/Publications/APN>,
2019 edition, merely says that the International Date Line
"coincides with the 180th meridian over most of its length."

Múte Bourup Egede via Jógvan Svabo Samuelsen (2023-03-15):

Greenland will not switch to Daylight Saving Time this year, 2023,
because the standard time for Greenland will change from UTC -3 to UTC -2.
However, Greenland will change to Daylight Saving Time again in 2024
and onwards.

Attached to: Thule (europe)

Jule Dabars (2023-10-29):

https://www.dr.dk/nyheder/seneste/i-nat-skal-uret-stilles-en-time-tilbage-men-foerste-gang-sker-det-ikke-i-groenland
with a link to that page:
https://naalakkersuisut.gl/Nyheder/2023/10/2710_sommertid
... Ittoqqortoormiit joins the time of Nuuk at March 2024.
What would mean that America/Scoresbysund would either be in -01 year round
or in -02/-01 like America/Nuuk, but no longer in -01/+00.

Attached to: Thule (europe)

Paul Eggert (2023-10-29):

For now, assume it will be like America/Nuuk.

Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S

Attached to: Thule (europe)

Paul Eggert (2023-01-23):

Public law 106-564 (2000-12-23) introduced "Chamorro standard time"
for time in Guam and the Northern Marianas.  See the file "australasia".
Also see 15 U.S.C. §263 <https://www.law.cornell.edu/uscode/text/15/263>.

Attached to: NYC (northamerica)

Paul Eggert (2023-01-23):

America/Adak is for the Aleutian Islands that are part of Alaska
and are west of 169.5° W.

Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]

Attached to: America/Juneau (northamerica)

Paul Eggert (2023-07-26):

Transition dates are now set by Law No. 7115, not by presidential decree.
https://www.abc.com.py/politica/2023/07/12/promulgacion-el-cambio-de-hora-sera-por-ley/

Attached to: Para (southamerica)

Carlos Raúl Perasso (2023-07-27):

http://silpy.congreso.gov.py/descarga/ley-144138

Attached to: Para (southamerica)