On 2026-03-15 08:52, Chris Walton via tz wrote:
https://www.rdek.bc.ca/news/entry/rdek_board_moves_to_transition_to_year_round_mountain_standard_time
Thanks for the heads-up. Although it was a close vote, I think unlikely they'll reverse it as few like messing with the clocks twice a year. And even less likely do I see the BC government overturning it, as the BC government already said this sort of thing is OK. Proposed patch attached. If we release 2026b and East Kootenay later says "never mind", we can replace the patch with a backward link to the name of our misguessed Zone.
From 09b419079a2c8c0c8b60f3e1a471b55a1ed7f73e Mon Sep 17 00:00:00 2001 From: Paul Eggert <[email protected]> Date: Sun, 15 Mar 2026 12:19:06 -0700 Subject: [PROPOSED] New zone America/Cranbrook for East Kootenay, BC (Thanks to Chris Walton.) * NEWS: Mention this. * northamerica, zone.tab, zone1970.tab, zonenow.tab: (America/Cranbrook): New zone. It mimics America/Edmonton until 2026-11-01 02:00, except (like Shanks & Pottenger) it omits DST in 1920, 1921 and 1947. --- NEWS | 4 ++++ northamerica | 10 ++++++++++ zone.tab | 1 + zone1970.tab | 1 + zonenow.tab | 3 +++ 5 files changed, 19 insertions(+) diff --git a/NEWS b/NEWS index d7bf5a3c..905a086d 100644 --- a/NEWS +++ b/NEWS @@ -15,6 +15,10 @@ Unreleased, experimental changes a limitation in CLDR v48.1 (2026-01-08). This temporary hack is planned to be removed after CLDR is fixed. + The new zone America/Cranbrook is for East Kootenay, BC, which + moves from MST/MDT to year-round MST on 2026-11-01 at 02:00. + (Thanks to Chris Walton.) + Changes to code zic no longer mishandles a last transition to a new time type. diff --git a/northamerica b/northamerica index ee0dc50a..a5b04779 100644 --- a/northamerica +++ b/northamerica @@ -2021,6 +2021,16 @@ Zone America/Fort_Nelson -8:10:47 - LMT 1884 -8:00 Vanc P%sT 1987 -8:00 Canada P%sT 2015 Mar 8 2:00 -7:00 - MST +# From Chris Walton (2026-03-15): +# The Regional District of East Kootenay is planning to move to year-round +# Mountain Standard Time (MST) on November 1, 2026.... +# https://www.rdek.bc.ca/news/entry/rdek_board_moves_to_transition_to_year_round_mountain_standard_time +Zone America/Cranbrook -7:43:04 - LMT 1906 Sep + -7:00 Edm M%sT 1920 + -7:00 Canada M%sT 1972 + -7:00 Edm M%sT 1974 + -7:00 Canada M%sT 2026 Nov 1 02:00 + -7:00 - MST # For Creston see America/Phoenix. # Northwest Territories, Nunavut, Yukon diff --git a/zone.tab b/zone.tab index d74dfd86..80037dcd 100644 --- a/zone.tab +++ b/zone.tab @@ -125,6 +125,7 @@ CA +5333-11328 America/Edmonton Mountain - AB, BC(E), NT(E), SK(W) CA +690650-1050310 America/Cambridge_Bay Mountain - NU (west) CA +682059-1334300 America/Inuvik Mountain - NT (west) CA +4906-11631 America/Creston MST - BC (Creston) +CA +4931-11546 America/Cranbrook MST - BC (E Kootenay) CA +5546-12014 America/Dawson_Creek MST - BC (Dawson Cr, Ft St John) CA +5848-12242 America/Fort_Nelson MST - BC (Ft Nelson) CA +6043-13503 America/Whitehorse MST - Yukon (east) diff --git a/zone1970.tab b/zone1970.tab index 104c3efe..d70a46c7 100644 --- a/zone1970.tab +++ b/zone1970.tab @@ -115,6 +115,7 @@ CA +5017-10750 America/Swift_Current CST - SK (midwest) CA +5333-11328 America/Edmonton Mountain - AB, BC(E), NT(E), SK(W) CA +690650-1050310 America/Cambridge_Bay Mountain - NU (west) CA +682059-1334300 America/Inuvik Mountain - NT (west) +CA +4931-11546 America/Cranbrook MST - BC (E Kootenay) CA +5546-12014 America/Dawson_Creek MST - BC (Dawson Cr, Ft St John) CA +5848-12242 America/Fort_Nelson MST - BC (Ft Nelson) CA +6043-13503 America/Whitehorse MST - Yukon (east) diff --git a/zonenow.tab b/zonenow.tab index 9f01a9f9..43b7bfc3 100644 --- a/zonenow.tab +++ b/zonenow.tab @@ -64,6 +64,9 @@ XX +4916-12307 America/Vancouver British Columbia (most areas) # -07 - MST XX +332654-1120424 America/Phoenix Mountain Standard (MST) - Arizona; western Mexico; Yukon # +# -07/-06 - MST/MDT (North America DST) until 2026-11-01 02:00; then MST +XX +4931-11546 America/Cranbrook MST - BC (E Kootenay) +# # -07/-06 - MST/MDT (North America DST) XX +394421-1045903 America/Denver Mountain (MST/MDT) - US & Canada; Mexico near US border # -- 2.51.0
