From bb7bfd2dd475402b79a87263ee89aa78c4af7c60 Mon Sep 17 00:00:00 2001 From: Paul Eggert Date: Fri, 2 Dec 2022 13:26:46 -0800 Subject: [PROPOSED] Much of Greenland still uses DST from 2024 on (Thanks to Thomas M. Steenholdt.) * NEWS: Mention this. * europe (America/Nuuk): Instead of switching from -03/-02 to permanent -02 in March 2023, switch from -03/-02 to -02/-01 in October 2023. --- NEWS | 11 +++++++++++ europe | 29 ++++++++++++++--------------- 2 files changed, 25 insertions(+), 15 deletions(-) diff --git a/NEWS b/NEWS index 91ec505..ac0b611 100644 --- a/NEWS +++ b/NEWS @@ -3,9 +3,20 @@ News for the tz database Unreleased, experimental changes Briefly: + Much of Greenland still uses DST from 2024 on. The code now defaults to C99 or later. Fix use of C23 attributes. + Changes to future timestamps + + Much of Greenland, represented by America/Nuuk, will continue to + observe DST using European Union rules. When combined with + Greenland's decision not to change the clocks in fall 2023, + America/Nuuk therefore changes from -03/-02 to -02/-01 effective + 2023-10-29 at 01:00 UTC. (Thanks to Thomas M. Steenholdt.) + This change from 2022g doesn't affect timestamps until 2024-03-30, + and doesn't affect tm_isdst until 2023-03-25. + Changes to code The code by default is now designed for C99 or later. To build in diff --git a/europe b/europe index a3547b4..07de4f2 100644 --- a/europe +++ b/europe @@ -1113,19 +1113,18 @@ Zone Atlantic/Faroe -0:27:04 - LMT 1908 Jan 11 # Tórshavn # # From Jürgen Appel (2022-11-25): # https://ina.gl/samlinger/oversigt-over-samlinger/samling/dagsordener/dagsorden.aspx?lang=da&day=24-11-2022 -# If I understand this correctly, from the next planned switch to -# summer time, Greenland will permanently stay at that time, i.e. no -# switch back to winter time in 2023 will occur. -# -# From Paul Eggert (2022-11-28): -# The official document in Danish -# https://naalakkersuisut.gl/-/media/naalakkersuisut/filer/kundgoerelser/2022/11/2511/31_da_inatsisartutlov-om-tidens-bestemmelse.pdf?la=da&hash=A33597D8A38CC7038465241119EF34F3 -# says standard time for Greenland is -02, that Naalakkersuisut can lay down -# rules for DST and can require some areas to use a different time zone, -# and that this all takes effect 2023-03-25 22:00. The abovementioned -# "bekymringer" URL says the intent is no transition March 25, that -# Greenland will not go back to winter time in fall 2023, and that -# only America/Nuuk is affected (though further changes may occur). +# +# From Thomas M. Steenholdt (2022-12-02): +# - The bill to move America/Nuuk from UTC-03 to UTC-02 passed. +# - The bill to stop observing DST did not (Greenland will stop observing DST +# when EU does). +# Details on the implementation are here (section 6): +# https://ina.gl/dvd/EM%202022/pdf/media/2553529/pkt17_em2022_tidens_bestemmelse_bem_da.pdf +# This is how the change will be implemented: +# 1. The shift *to* DST in 2023 happens as normal. +# 2. The shift *from* DST in 2023 happens as normal, but coincides with the +# shift to UTC-02 normaltime (people will not change their clocks here). +# 3. After this, DST is still observed, but as -02/-01 instead of -03/-02. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Thule 1991 1992 - Mar lastSun 2:00 1:00 D @@ -1149,8 +1148,8 @@ Zone America/Scoresbysund -1:27:52 - LMT 1916 Jul 28 # Ittoqqortoormiit -1:00 EU -01/+00 Zone America/Nuuk -3:26:56 - LMT 1916 Jul 28 # Godthåb -3:00 - -03 1980 Apr 6 2:00 - -3:00 EU -03/-02 2023 Mar 25 22:00 - -2:00 - -02 + -3:00 EU -03/-02 2023 Oct 29 1:00u + -2:00 EU -02/-01 Zone America/Thule -4:35:08 - LMT 1916 Jul 28 # Pituffik -4:00 Thule A%sT -- 2.38.1