Here are the steps you should take if your Microsoft calendar is showing the wrong time for events in different time zones:

1. Check to see if your device Time Zone settings are correct and match your calendar.
2. Ensure that you are using the most up-to-date Microsoft calendar version and check for any available updates.
3. Verify that your calendar is set to show all-day events according to the correct Default Time Zone.
4. Check your calendar preferences to see that the Time Format is set to be consistent across multiple locations.