On 2026-09-29 13:19, Tim Parenti wrote:
Presumably one of
the as-yet missing OiCs (numbers 205 through 221/2026) is what we're
looking for to complete the documentary chain.
Yes, when Manitoba publishes the Order in Council we should document it
in our commentary. In the meantime I installed the attached, which
updates the source data to reflect the official date and which documents
a link to the procolamation. The idea is to publish a new TZDB release
very soon (after a brief review by tz readers), even if Manitoba takes
its time to publish the OiC.
Although the attached patch does not affect TZif output files, it will
do so after we remove the temporary hacks for Canada in a subsequent
release.
From 01f73bc12aad4e022b579a6d855f6d48a64b08a6 Mon Sep 17 00:00:00 2001
From: Paul Eggert <[email protected]>
Date: Tue, 29 Sep 2026 13:29:12 -0700
Subject: [PROPOSED] =?UTF-8?q?Manitoba=E2=80=99s=20legal=20change=20is=202?=
=?UTF-8?q?026-10-31?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
(Thanks to Ashish Kumar.)
* NEWS: Mention this.
* northamerica (America/Winnipeg): Add temporary hack.
---
NEWS | 13 +++++++------
northamerica | 11 +++++++----
2 files changed, 14 insertions(+), 10 deletions(-)
diff --git a/NEWS b/NEWS
index eebc7b12..aacf1c83 100644
--- a/NEWS
+++ b/NEWS
@@ -3,16 +3,17 @@ News for the tz database
Unreleased, experimental changes
Briefly:
- Manitoba moves to permanent -05 on 2026-11-01.
+ Manitoba moves to permanent -05 on 2026-10-31.
Changes to future timestamps
Manitoba’s 2026-03-08 spring forward was its last foreseeable clock
- change, as it has announced a move to permanent -05 thereafter.
- Model this with its traditional abbreviation EST. In the absence of
- information on the exact implementation date for the regulatory
- mechanism, model the change to occur on 2026-11-01 at 02:00, when
- clocks would otherwise fall back.
+ change, as it moved to permanent -05 thereafter. Model this with
+ its traditional abbreviation EST. Although the change to
+ permanent -05 legally takes place on 2026-10-31, temporarily model
+ the change to occur on 2026-11-01 at 02:00 for the same reason as
+ other recent temporary hacks. (Caution: see “NOTE FOR 2026b
+ TEMPORARY HACK FOR CLDR AND CANADA” below.)
As the change affects both America/Winnipeg and its backward
compatibility link, the obsolescent setting TZ="Canada/Central"
diff --git a/northamerica b/northamerica
index 9c7b641d..57ea8297 100644
--- a/northamerica
+++ b/northamerica
@@ -1834,9 +1834,9 @@ Zone America/Toronto -5:17:32 - LMT 1895
# varying the reckoning" of official time in Manitoba, provided the minister
# has "due regard for the applicable time zone in neighbouring jurisdictions."
# https://web2.gov.mb.ca/laws/statutes/2023/pdf/c00423.pdf
-# At time of writing, the Act has not yet officially been brought into force;
-# for now, model the change to occur on 2026-11-01 at 02:00, when clocks would
-# otherwise fall back.
+# From Paul Eggert (2026-09-29), after a heads-up from Ashish Kumar:
+# The law comes into force on 2026-10-31.
+# https://web2.gov.mb.ca/laws/statutes/proclamations/2023c4(2026-10-31).pdf
# Rule NAME FROM TO - IN ON AT SAVE LETTER/S
Rule Winn 1916 only - Apr 23 0:00 1:00 D
@@ -1866,7 +1866,10 @@ Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16
-6:00 Winn C%sT 2006
- -6:00 Canada C%sT 2026 Nov 1 2:00 # presumed
+ -6:00 Canada C%sT 2026 Oct 31
+ # Temporary hack; see above.
+ -6:00 Canada CDT 2026 Nov 1 2:00
+ # End of temporary hack.
-5:00 - EST
--
2.55.0
