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.