Windows: New time zones for Alberta, British Columbia, Manitoba; no clock change on Nov 1, 2026

Summary

Microsoft has released Windows updates that add new region-specific time zones for Alberta, British Columbia and Manitoba. On November 1, 2026, clocks in these provinces will not be set back by one hour. Devices without the update or the correct time zone setting might display the wrong local time.

What changes?

From November 1, 2026, devices without the update or with the wrong time zone might show the wrong local time, because the clocks are not set back by one hour. Calendar entries in Outlook for Alberta and British Columbia may also be affected.

Affected

• Windows devices located in or managed for Alberta, British Columbia or Manitoba
• Outlook calendars for Alberta and British Columbia (see Microsoft's Outlook guidance)
• The source does not name specific KB numbers

Preparation and temporary exceptions

1. Install the applicable Windows update for Alberta, British Columbia or Manitoba.
2. Confirm that each device uses the appropriate time zone for its region; devices set to set the time zone automatically select it based on location.
3. For Outlook, follow Microsoft's guidance "Outlook Time Zone Changes for Alberta and British Columbia".

Check and complete

Install the applicable Windows update and check the time zone setting on each device. The change takes effect on November 1, 2026.

Recommendation

If you have users or devices in Alberta, British Columbia or Manitoba, check now that the update is installed and that the correct time zone is set. Also review Outlook calendar entries for Alberta and British Columbia using Microsoft's guidance.

Timeline

1. 16 Oct 2026Microsoft updated its message: Windows updates with new region-specific time zones for Alberta, British Columbia and Manitoba are available.
2. 1 Nov 2026Clocks in the affected provinces are not set back by one hour. Devices without the update or correct time zone might show the wrong local time.

Sources

• Windows message center: Windows updates are available for 2026 time zone changes in Canada Vendor · techcommunity.microsoft.com
• Alberta 2026 time zone update available now Vendor · techcommunity.microsoft.com
• British Columbia 2026 time zone update available now Vendor · techcommunity.microsoft.com
• Manitoba 2026 time zone update available now Vendor · techcommunity.microsoft.com
• Outlook Time Zone Changes for Alberta and British Columbia Vendor · support.microsoft.com

Compiled from the sources listed and translated with AI (Claude); status and dates come from the vendor. The vendor’s statements are authoritative. Updated 1 Nov 2026, 15:46.