[tz] [PROPOSED] Ittoqqortoormiit (America/Scoresbysund) zone change

[Doug Ewell]

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From: tz <tz-bounces at iana.org> on behalf of Paul Eggert via tz <tz at iana.org>
Sent: Sunday, October 29, 2023 1:54:01 PM
To: tz at iana.org <tz at iana.org>
Subject: [tz] [PROPOSED] Ittoqqortoormiit (America/Scoresbysund) zone change

* NEWS: Mention this.
* europe (America/Scoresbysund): Switch to -02/-01 on 2024-03-31.
---
 NEWS   |  8 ++++++++
 europe | 14 +++++++++++++-
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/NEWS b/NEWS
index 9a085948..e5ead4cf 100644
--- a/NEWS
+++ b/NEWS
@@ -3,10 +3,18 @@ News for the tz database
 Unreleased, experimental changes

   Briefly:
+    Ittoqqortoormiit, Greenland changes time zones on 2024-03-31.
     Code and data fixes for Palestine timestamps starting in 2072.

   Changes to future timestamps

+    Ittoqqortoormiit, Greenland (America/Scoresbysund) joins most of
+    the rest of Greenland's timekeeping practice on 2024-03-31, by
+    changing its time zone from -01/+00 to -02/-01 at the same moment
+    as the spring-forward transition.  Its clocks will therefore not
+    spring forward as previously scheduled.  The time zone change
+    reverts to its common practice before 1981.
+
     Fix predictions for DST transitions in Palestine in 2072-2075,
     correcting a typo introduced in 2023a.

diff --git a/europe b/europe
index 012d1498..6e59f62d 100644
--- a/europe
+++ b/europe
@@ -1130,6 +1130,17 @@ Zone Atlantic/Faroe      -0:27:04 -      LMT     1908 Jan 11 # Tórshavn
 # However, Greenland will change to Daylight Saving Time again in 2024
 # and onwards.

+# From an contributor who wishes to remain anonymous for now (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.
+#
+# From Paul Eggert (2023-10-29):
+# For now, assume it will be like America/Nuuk.
+
 # Rule  NAME    FROM    TO      -       IN      ON      AT      SAVE    LETTER/S
 Rule    Thule   1991    1992    -       Mar     lastSun 2:00    1:00    D
 Rule    Thule   1991    1992    -       Sep     lastSun 2:00    0       S
@@ -1149,7 +1160,8 @@ Zone America/Danmarkshavn -1:14:40 -      LMT     1916 Jul 28
 Zone America/Scoresbysund -1:27:52 -    LMT     1916 Jul 28 # Ittoqqortoormiit
                         -2:00   -       -02     1980 Apr  6  2:00
                         -2:00   C-Eur   -02/-01 1981 Mar 29
-                       -1:00   EU      -01/+00
+                       -1:00   EU      -01/+00 2024 Mar 31
+                       -2:00   EU      -02/-01
 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 26  1:00u
--
2.39.2

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