Interim guidance for Manitoba time zone changes

🚨 The Signal: Manitoba's time zone is permanently changing to UTC-5 in November 2026. Windows devices require an update or manual configuration to reflect this, preventing time synchronization issues.

The Impact

Devices in Manitoba are affected, risking incorrect time display and potential data integrity issues if not updated.

• Manitoba users: Devices will show incorrect time without update.
• IT Admins: Must deploy updates or manage manual configuration.
• Business operations: Scheduling and logging may be inaccurate.
• Compliance teams: Review time synchronization for audit trails.

The Action

1. Plan to install the October 2026 Windows security update on all affected devices in Manitoba before November 1, 2026.
2. For devices that cannot be updated in time, review and implement the interim guidance from the Microsoft Daylight Saving Time & Time Zone Blog.
3. Communicate to users in Manitoba that they may need to manually select the new '(UTC-05:00) Manitoba' time zone if automatic updates are not enabled.

Domain: Other · Impact: low · Workload: Other · Essential Eight: Patch Operating Systems · ISM: ISM-1407, ISM-1501, ISM-1621, ISM-1622, ISM-1623, ISM-1654, ISM-1655, ISM-1694, ISM-1695, ISM-1696, ISM-1701, ISM-1702, ISM-1877, ISM-1889, ISM-1902