Interim guidance for Morocco DST change 2026

In a recent announcement, the Government of Morocco communicated a change to Daylight Saving Time (DST). Starting at 02:00 a.m. September 20, 2026, the official time will be turned back by an hour, to UTC+0 time zone.

The impact of this change is as follows:

1. Clocks will be turned backward by an hour at 02:00 a.m. on September 20, 2026, for the Casablanca time zone.

Microsoft plans to release an update to support this change. However, we require sufficient time to properly build, test, and release such an update for all platforms before the change goes into effect. See How Windows manages time zone changes to better understand the complexities of this process.

All supported windows platforms will receive an update to support this time zone change as part of September 08, 2026, security update, including

• Windows 11, Version 26H1
• Windows 11, version 25H2
• Windows 11, version 24H2
• Windows Server 2025
• Windows Server 2022
• Windows Server 2019 and other supported platforms

Interim guidance

In cases where the monthly update cannot be received or installed before 20^th of September, affected organizations with devices in Morocco are advised to use the following workarounds: Temporarily disable – ‘set time zone automatically’ option in Windows and set a different time zone to reflect the correct local time.

Temporarily set a different time zone on the devices

Microsoft recommends that users temporarily disable automatic time zone selection and set the time zone on their devices to “(UTC) Coordinated Universal Time” on September 20, 2026 at 02:00 a.m. Selecting this time zone will ensure that devices reflect the correct local time. (Note: events that have occurred in the past, before the update, will not show correctly.)

This can be done through below steps:

• Select the Windows logo key, type "time zone", and select ‘Set time zone automatically’ and turn off the option
• Now, select Change the time zone. From the time zone dropdown, select “(UTC) Coordinated Universal Time”.

For additional information, please review our official policy page and How Windows manages time zone changes.