Canada Time Zone Change: Manitoba, Alberta and BC Stop Changing Clocks, and Your Windows PC May Be an Hour Off

The Canada time zone change lands on November 1, 2026: Manitoba, Alberta and most of British Columbia stop moving their clocks, and Windows needs an update to know about it. If your PC is still set to an old US time zone, it will show the wrong time by an hour from today.

Quick facts:

• The change takes effect November 1, 2026, the same day most of North America falls back.
• Manitoba stays on UTC-5, Alberta on UTC-6 and most of BC on UTC-7, all year round.
• Windows got the new zones in the September 22 preview (Windows 11 24H2 and 25H2) and the October 13 security update (all supported versions).
• Installing the update is not enough. Your device only switches if Set time zone automatically is on.
• Saskatchewan and Yukon are not affected.

That list is the short version. The rest of this guide shows how to check your own device and what else might quietly keep the old schedule.

What the Canada time zone change actually changes

For years, these provinces moved their clocks twice a year. From November 1 they stay put. According to Microsoft’s message center post MC1510951, Windows now has three new zones for them: Manitoba, Mountain Time (Alberta) and Pacific Time (British Columbia).

The Alberta zone also covers Yellowknife and Inuvik in the Northwest Territories, plus parts of southeastern BC that follow Alberta. The table below shows which Windows zone to pick, based on a rundown from Regroove.

One side effect: this winter, BC will be an hour ahead of Washington, Oregon and California. Recurring meetings with US Pacific colleagues will shift on your calendar, and that is expected.

Why your Windows PC can still show the wrong time

The Windows time zone update only adds the new zones to the list. It does not move you into one. Your PC switches by itself only if automatic time zone and location services are both working.

If you picked your zone by hand years ago, it will stay on the old one. Open Settings > Time & language > Date & time. If you see (UTC-08:00) Pacific Time (US & Canada), the clock will be an hour off after the change.

Domain sign-in is not at risk. Windows syncs time in UTC, and the zone only changes what you see on screen.

How to fix the time zone on Windows 11 in two minutes

First make sure the October 13 security update (or the September preview on 24H2 and 25H2) is installed. Then follow these steps:

1. Open Settings and go to Time & language, then Date & time.
2. Turn on Set time zone automatically, or pick your new zone from the drop-down list.
3. Check that the clock in the taskbar matches your local time.

IT admins can push the change with PowerShell, for example Set-TimeZone -Id "Alberta Standard Time" or Set-TimeZone -Id "British Columbia Standard Time".

If a PC cannot be updated yet, Microsoft suggests stand-in zones. Which one is right depends on the date, as the table shows.

Do not keep the old US zones after November 1. They fall back an hour, which is exactly the problem you are trying to avoid.

Unsupported Windows versions do not get the new zones at all. If you are still on Windows 11 23H2, read our guide to Windows 11 23H2 end of support, because it stops getting updates on November 10.

Phones, routers and other gadgets that keep local time

Phones update their own time data with the OS, so keep yours current and leave automatic time on. Linux machines need an updated tzdata package, and apps that bundle their own time zone data (many Java and web apps) need a vendor update.

The sneaky ones are network gear. Many firewalls and switches use a fixed offset plus a daylight saving rule that will still fall back an hour on November 1. Running them on UTC, or on a fixed offset with daylight saving off, is the safest fix.

Cameras, door-access systems and phone systems should also be corrected, so recorded times and business hours stay accurate. Time bugs like this are common around clock changes, as we saw with the Apple Watch daylight saving bug.

Outlook users should check recurring meetings after switching zones. Regroove notes that changing a recurring series can reset moved occurrences, and that Microsoft reports an hour-late display issue for Alberta events in New Outlook for Mac and Outlook for iOS.

Cuba is also in the news. Microsoft posted interim guidance for Cuba on its time zone blog after an October 27 announcement about daylight saving, so check that post if you manage devices there.

Frequently Asked Questions

Do I need to change the time zone on my phone?

Usually not. Phones update their time data with the OS, so install pending updates and keep automatic date and time on. Check that the clock matches local time on November 1.

Is the Canada time zone change permanent?

Per Regroove, yes. Clocks in the affected provinces stop changing, so this is not a one-year trial.

Does Saskatchewan change its clocks?

No. Saskatchewan and Yukon are unaffected, and the rest of Canada still changes clocks.

Will the wrong time stop me signing in to my work PC?

No. Windows syncs time in UTC, so the zone only changes the time you see, not domain authentication.

Why does my Windows PC still show the old zone after updating?

The update only adds the new zones. Turn on automatic time zone or select the new one yourself in Settings.

My take: this is a five-minute job that is easy to forget, and it is the missed device that causes trouble. Fix your own PC today, then spend ten more minutes on the quiet ones, like the office firewall, the security cameras and any shared calendars. If you manage a team, send them the Settings path above before Monday morning.