Alberta 2026 time zone update available now

Well, this is turning into a nightmare.  Microsoft has released the patch for Windows 11 and Servers, but there are a many of side-effects.  Here are some of the other items:

• SharePoint Calendars needs to be adjusted.
• Teams code base is inconsistent; you see a mixture of times shifts in the Calendar and Chat Log.
• Teams Rooms - depending if it is Android or Windows, should be checked.
• Google Chrome does not know how to use the new time zone.  (https://support.google.com/chrome/thread/472933334/chrome-incorrectly-detects-alberta-s-new-utc%E2%88%926-timezone-as-utc%E2%88%927?hl=en)
• Apple Calander needs to be checked, if it is connected to Exchange

https://support.microsoft.com/en-us/outlook/calendar/timezone-changes-for-canada-provinces

https://learn.microsoft.com/en-us/answers/questions/6002950/microsoft-bookings-timezone-support-for-british-co

https://devblogs.microsoft.com/azure-sql/canadas-2026-time-zone-updates-guidance-for-microsoft-sql/

https://learn.microsoft.com/en-us/answers/questions/6026743/new-outlook-for-mac-and-outlook-for-ios-display-al

Additionally, this year IsDaylightSavingTime returns TRUE, next year it is FALSE.  Who thinks that will not causes a programming issue.

#Store current time zone value
$tz = Get-TimeZone
$tz

#show before and after values for UTC offset and DST support
$dates = @(
    [datetime]'2026-10-31 12:00',
    [datetime]'2026-11-01 12:00',
    [datetime]'2026-12-01 12:00',
    [datetime]'2027-01-15 12:00',
    [datetime]'2027-07-15 12:00'
)
foreach ($date in $dates){
    [PSCustomObject]@{
        Date      = $date
        UTCOffset = $tz.GetUtcOffset($date)
        IsDST     = $tz.IsDaylightSavingTime($date)
    }
}

#show adjustment rules
$tz.GetAdjustmentRules() | Format-List *

Results in:

Date                   UTCOffset IsDST
----                   --------- -----
10/31/2026 12:00:00 PM -06:00:00  True
11/1/2026 12:00:00 PM  -06:00:00  True
12/1/2026 12:00:00 PM  -06:00:00  True
1/15/2027 12:00:00 PM  -06:00:00 False
7/15/2027 12:00:00 PM  -06:00:00 False

On the new time zone, the Work Hours and location features in Outlook and Teams are not working.

In Classic Outlook, my existing work hours show correctly in the calendar, and existing locations are displayed. However, I can't change them.

In Outlook on the web, work locations aren't shown, and when attempting to set them via the Options I get a banner message "Something went wrong while updating your schedule. Please try again later."

In Teams, no one's work location is shown, and I am not able to see or set my own work location.

I can't be certain this is specifically related to the time zone update, but that is the only change since last week, when this worked normally.

With this OS update installed and the new time zone set, there are issues in Teams:

Also, time stamps on Teams chat messages are one hour off, and users on the original time zone show the wording "Your time zone is 1 h behind." in their contact card pop-up.

We currently have a mismatch on time in our TMRs. The PC itself has the new time zone and has changed to it. Windows time is correct.

But the meeting room panel when it is in the Teams account displays the wrong time.  The Alberta Time Zone is also not available on myaccount.microsoft.com.

I will second DDJeffrey. The communication has been underwhelming. 

In the previous versions of the posting here you had reference to Outlook.  Since that was information was dropped, does that mean?

A) It was never a problem; B) It will be fine; C) Microsoft will automatically update all reoccurring meetings across the Standard and Daylight times that were previously set; D) All the Daylight calendar reoccurring meetings will shift by an hour; E) Not sure, we will get back to you.

We have already seen issues (shift ahead one hour) as we try and get ahead of this and shift our Teams Meeting Room equipment.  What is the status of that?  (Looking for information on both Android and Windows TMR)

Now you have us thinking... How will meetings show up in Apple Calendar and iOS Outlook Calendar?  What about Android?

The communications of this change and impacts has been underwhelming.