Windows: Time zone changes for Alberta, British Columbia and Morocco

Summary

Three time zone changes affect Windows devices in Alberta, British Columbia and Morocco. Morocco moved to UTC+0 on 2026-09-20; Alberta and most of British Columbia change permanently on 2026-11-01. Microsoft is releasing fixes across September and October 2026 and recommends temporary workarounds for devices that cannot be updated in time.

What changes?

Devices without the updated time zone data may show the wrong local time in the affected regions. This can affect calendars, scheduled tasks, logs and time-dependent applications. Alberta and the affected Northwest Territories locations move permanently to UTC-6 and most of British Columbia to UTC-7 on 2026-11-01. Morocco turned its clocks back one hour to UTC+0 on 2026-09-20.

Affected

• Windows devices in Alberta and affected Northwest Territories locations (UTC-6 from 2026-11-01)
• Windows devices in most of British Columbia (UTC-7 from 2026-11-01)
• Windows devices in Morocco (UTC+0 since 2026-09-20)
• Devices that have not received the corresponding time zone updates

Preparation and temporary exceptions

1. Open the regional guidance on the Microsoft Daylight Saving Time & Time Zone Blog for Alberta, British Columbia or Morocco.
2. Apply the temporary workaround described there on devices that cannot be updated in time.

Check and complete

Microsoft is releasing fixes across September and October 2026. Verify that the relevant updates are installed on affected devices and that the local time is correct.

Recommendation

Check whether your users, sites or devices are in the affected regions. Install the current Windows updates with the time zone fixes, and check calendars, scheduled tasks and time-sensitive applications. For devices that cannot be updated, use the temporary workaround from the Microsoft regional guidance.

Timeline

1. 20 Sep 2026Morocco turned its clocks back one hour to UTC+0.
2. 1 Nov 2026Alberta and affected Northwest Territories locations move permanently to UTC-6; most of British Columbia moves permanently to UTC-7.

Sources

• Daylight Saving Time & Time Zone Blog Vendor · techcommunity.microsoft.com
• Interim guidance for Alberta time zone changes 2026 Vendor · techcommunity.microsoft.com
• Interim guidance for British Columbia time zone changes 2026 Vendor · techcommunity.microsoft.com
• Interim guidance for Morocco DST change 2026 Vendor · techcommunity.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, 15:56.