- On your computer, open Google Calendar.
- On the left side of the page, find the My calendars list.
- To the right of your calendar's name, click the dropdown menu > Trash. ...
- Check the box to the left of any events you want to move.
- Click Delete forever or Restore selected events.
See your deleted events (computer only)
Delete an event - Calendar Help - the Google Help Center
https://support.google.com/calendar/answer/37113?hl=en
Google
Video Instructions from the GOORU
https://www.thegooru.com/how-to-restore-deleted-google-calendar-events/