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Daylight Saving Time & Time Zone Blog
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Interim guidance for Manitoba permanent DST 2026

Naveen_Shankar's avatar
Naveen_Shankar
Icon for Microsoft rankMicrosoft
Oct 07, 2026

Microsoft has made a decision about addressing the new time-related change for Manitoba

Editor's note October 13, 2026: Microsoft has released an update to address the new time-related change for Manitoba. Please refer to Manitoba 2026 time zone update available now On September 17, 2...
Updated Oct 27, 2026
Version 5.0
calendarjunkie's avatar
calendarjunkie
Copper Contributor
Oct 14, 2026

I see the new time zone in Windows and Outlook classic but importing an iCalendar file with TZID:America/Winnipeg and a valid VTIMEZONE definition still imports using the US rules.  Is that a known issue?  Is a different TZID being used. New BC and Alberta imports work as expected.  Sample ics below.

BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:Manitoba
X-WR-TIMEZONE:America/Winnipeg
BEGIN:VTIMEZONE
TZID:America/Winnipeg
BEGIN:STANDARD
TZOFFSETFROM:-0500
TZOFFSETTO:-0600
TZNAME:CST
DTSTART:20071104T020000
RRULE:FREQ=YEARLY;UNTIL=20251102T070000Z;BYMONTH=11;BYDAY=1SU
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:-0600
TZOFFSETTO:-0500
TZNAME:CDT
DTSTART:20070311T020000
RRULE:FREQ=YEARLY;UNTIL=20261101T070000Z;BYMONTH=3;BYDAY=2SU
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0500
TZOFFSETTO:-0500
TZNAME:Central Time
DTSTART:20261101T020000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
SUMMARY:Monthly Manitoba
DTSTART;TZID=America/Winnipeg:20261014T090000
DTEND;TZID=America/Winnipeg:20261014T100000
X-MICROSOFT-CDO-ALLDAYEVENT:FALSE
RRULE:FREQ=MONTHLY;UNTIL=20271015T000000Z;INTERVAL=1
LAST-MODIFIED:20261014T133217Z
CREATED:20261014T133300Z
DTSTAMP:20261014T133217Z
UID:asdgfapdsgawsrdf
END:VEVENT
END:VCALENDAR