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Firefox is lacking support for new timezones in Canada

Firefox Site breakages
TyDraniu replied 13 hours ago
nsal9
nsal9

Canadian provinces of BC, AB, and MB are all moving to new timezones on Nov 1, 2026.

Firefox still does not support any of the new timezones. This will break automatic timezone support for many applications, if not addressed immediately.

For the new timezone: Pacific Time (British Columbia): - Intl.DateTimeFormat().resolvedOptions().timeZone returns "Etc/GMT+8" instead of the expected value 'America/Vancouver' - new Date().getTimezoneOffset() returns 480 instead of the expected 420

There is only a few days left to address this issue. What is the rollout plan for the required updates?

Thanks.

Canadian provinces of BC, AB, and MB are all moving to new timezones on Nov 1, 2026. Firefox still does not support any of the new timezones. This will break automatic timezone support for many applications, if not addressed immediately. For the new timezone: Pacific Time (British Columbia): - Intl.DateTimeFormat().resolvedOptions().timeZone returns "Etc/GMT+8" instead of the expected value 'America/Vancouver' - new Date().getTimezoneOffset() returns 480 instead of the expected 420 There is only a few days left to address this issue. What is the rollout plan for the required updates? Thanks.

All Replies (1)

TyDraniu
TyDraniu
  • Top 10 Contributor

It should be ready in Firefox 159, will be released on Tuesday.

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