Related to daylight saving: in the US on14 March, 2021, at 2:00AM the clocks are moved 1h forward.
Dojo example.
The selection is moved 1h back to 1:00AM (or 1:30AM respectively) and the event is created at this time.
The event should be created at 3:00AM. This will be consistent with the way Outlook handles daylight saving - in a new meeting if you select 2:00AM as a start time, it is automatically changed to 3:00AM.