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

[Paul Eggert]

* 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