Time change bug
There appears to be a bug with Outlook for Mac post time change. where time appears incorrectly in week view in calendar.
Good news. This bug has been addressed in the March production release of Outlook for Mac (version 16.11).
The issue fixed was if the default time zone for your Mac observes daylight saving time (DST) and Week view is selected, you may see events shifted by one hour on the calendar grid for the week when DST starts.
Outlook for Mac team