Teams Webinar time zone messaging different than Microsoft OS

Question

Teams Webinar time zone messaging different than Microsoft OS

Jyrkkan, S 0

When people in my organization register for the webinar I created they are receiving confirmations that are off by an hour. It is likely due to the fact that in British Columbia we are staying with daylight savings time which is now listed as UTC-07:00 Pacific Time (British Columbia). When I created the Teams webinars, that time zone was not available so I chose UTC-07:00 Yukon. The issue is that while the webinar downloads into the proper time zone in the registrant's Outlook/Teams calendars, the confirmation message is off by an hour which is creating confusion and will also mean all reminders will be off by an hour as well. I have checked that in Teams settings, the time is consistent with the OS which is likely why the sessions are correct in the calendars. This issue is affecting 35,000 staff. Please help asap.

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Answer 1

Hi,

Microsoft has confirmed that this comes from the British Columbia time zone change. In its Canada 2026 guidance, Teams Events is listed as a confirmed impact, and (UTC-07:00) Yukon is only a temporary alternative. Microsoft says those alternatives "should not be treated as permanent replacements". So the calendar invite (rendered by Outlook/Windows) and the registration emails (generated by the Teams Events service) convert the time differently.

The guidance doesn't cover registration emails specifically, so I d handle it like this:

Test with the new zone. Create a test webinar using (UTC-07:00) Pacific Time (British Columbia), register with your own account, and compare the confirmation email with the calendar entry. If the times match, use the BC zone for new sessions instead of Yukon.
For the existing webinars, open a support case in the Microsoft 365 admin center with #CanadaTimeZone in the title. Microsoft asks for that tag on time-zone cases, and it gets the case routed to the team working on this issue. Given 35,000 users, set the severity to high. Ask whether changing the time zone on an existing webinar resends the confirmations, before you change anything on the live events.
Until it's fixed, tell registrants that the calendar entry is the correct time and the email time is one hour off.

Reference: Canada 2026 time zone changes: Guidance for Microsoft products