Why does my Microsoft calendar show inconsistent time zones for events in the same series?

1. Check that the time zone set on the computer and in the calendar match.
2. Verify that the computer is sending the correct timestamp to the server.
3. Confirm that the appointment time is configured to adjust to daylight savings.
4. Ensure that the same time zone is selected across all appointment series.
5. Delete all old occurrences of the appointment series.