On 2026-03-15 09:52, Chris Walton via tz wrote:
Heads up:
The *Regional District of East Kootenay* is planning to move to year-round Mountain Standard Time (MST) on November 1, 2026. The district will seek approval from the province (British Columbia). I am skepitcal that they really need provincial approval, but I guess there is no harm in seeking it.
In practical terms the district would move from MDT to MST on November 1 as per usual. After that, the clocks would stay fixed on MST.
Currently most of East Kootenay uses the *America/Edmonton* TZ ID. There is a very small area in the southwest corner that uses *America/Creston*. If the change is approved, we would need a new TZ ID... probably something like "*America/Cranbrook"*.
https://www.rdek.bc.ca/news/entry/ rdek_board_moves_to_transition_to_year_round_mountain_standard_time <https:// www.rdek.bc.ca/news/entry/ rdek_board_moves_to_transition_to_year_round_mountain_standard_time>
Columbia-Shuswap Regional District lies to the north of East Kootenay Regional District. Some areas of Columbia-Shuswap are already on year-round MST and some areas (including the town of Golden) use MST/MDT. I would not be surprised if all of Columbia-Shuswap eventually adopts year-round MST. If that happens, the entire province of BC would be aligned on year-round MST.
Given that Eby has already announced that change on behalf of the AG for the whole province of BC as of 2026-03-09, and the list has agreed that it will be called MST by 2026-11-01, not Pacific as that would be confusing until the US changes. But for the history all areas could share with any of: $ zdump America/{Dawson_Creek,Fort_Nelson,Whitehorse,Dawson,Phoenix} America/Dawson_Creek Sun Mar 15 09:13:58 2026 MST America/Fort_Nelson Sun Mar 15 09:13:58 2026 MST America/Whitehorse Sun Mar 15 09:13:58 2026 MST America/Dawson Sun Mar 15 09:13:58 2026 MST America/Phoenix Sun Mar 15 09:13:58 2026 MST As BC is covered by America/Vancouver, that may be the changed zone. It is currently commented as "Pacific - BC (most areas)" maybe going to "MST - BC", and generically on most phones maybe America/Phoenix currently "Mountain Standard (MST) - Arizona; western Mexico; Yukon" to which will be added "BC;" depending on the zones supported by distros and adopted by platforms: $ grep 'MST\([^/]\|$\)' zone*.tab zone.tab:CA +4906-11631 America/Creston MST - BC (Creston) zone.tab:CA +5546-12014 America/Dawson_Creek MST - BC (Dawson Cr, Ft St John) zone.tab:CA +5848-12242 America/Fort_Nelson MST - BC (Ft Nelson) zone.tab:CA +6043-13503 America/Whitehorse MST - Yukon (east) zone.tab:CA +6404-13925 America/Dawson MST - Yukon (west) zone.tab:US +332654-1120424 America/Phoenix MST - AZ (except Navajo) zone1970.tab:CA +5546-12014 America/Dawson_Creek MST - BC (Dawson Cr, Ft St John) zone1970.tab:CA +5848-12242 America/Fort_Nelson MST - BC (Ft Nelson) zone1970.tab:CA +6043-13503 America/Whitehorse MST - Yukon (east) zone1970.tab:CA +6404-13925 America/Dawson MST - Yukon (west) zone1970.tab:US,CA +332654-1120424 America/Phoenix MST - AZ (most areas), Creston BC zonenow.tab:# -07 - MST zonenow.tab:XX +332654-1120424 America/Phoenix Mountain Standard (MST) - Arizona; western Mexico; Yukon See (for now) https://github.com/eggert/tz/commit/8e7dcafc27d6 -- Take care. Thanks, Brian Inglis Calgary, Alberta, Canada La perfection est atteinte Perfection is achieved non pas lorsqu'il n'y a plus rien à ajouter not when there is no more to add mais lorsqu'il n'y a plus rien à retrancher but when there is no more to cut -- Antoine de Saint-Exupéry