On 2026-06-19 13:22, Cary Sweet wrote:
this Regulation expires on June 30, 2031.
Does this mean that the Edmonton timezone in the patch should also revert back
to MST on that date?
No, even though that Alberta regulation expires then, it's merely about
the legal term for the time in Alberta. The Alberta Order in Council
that changes timekeeping, which is what counts for us, doesn't expire.
Although the legal term's provisional nature doesn't affect TZDB's data,
it's worth mentioning in a comment, to give a heads-up to downstream
uses like CLDR that deal with localization. I installed the attached
proposed patch to do that.
The regulation also simply deletes several instances of the phrase
"Mountain Standard Time" from other regulations, without replacing them
with "Alberta Time". I expect they did this because they didn't want the
hassle of replacing lots of "Alberta Time"s later.From f189058ef1cb193f715b826bfcd27c076c1c7201 Mon Sep 17 00:00:00 2001
From: Paul Eggert <[email protected]>
Date: Fri, 19 Jun 2026 14:15:11 -0700
Subject: [PROPOSED] =?UTF-8?q?Comment=20on=20expiration=20of=20the=20term?=
=?UTF-8?q?=20=E2=80=9CAlberta=20Time=E2=80=9D?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
* northamerica: Add a comment on when the term “Alberta Time” legally
expires in Alberta.
---
northamerica | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/northamerica b/northamerica
index 4ae6f457..b86c983e 100644
--- a/northamerica
+++ b/northamerica
@@ -1955,6 +1955,13 @@ Zone America/Swift_Current -7:11:20 - LMT 1905 Sep
# Since wall clock times do not diverge from past practice until 2026-11-01,
# use that transition date for now to work around potential CLDR limitations in
# the meantime; see British Columbia, below.
+#
+# From Paul Eggert (2026-06-19):
+# The term “Alberta Time” is legally prescribed from yesterday until
+# 2031-06-30, when OIC 202/2026 expires to ensure that the term is
+# reviewed by then for relevancy and need. This plan for possible
+# obsolescence affects neither timekeeping nor TZDB’s data, which do
+# not contain the string “Alberta Time”.
# Rule NAME FROM TO - IN ON AT SAVE LETTER/S
Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D
--
2.54.0
