You deleted Thursday’s appointment by mistake. In Google Calendar on a computer, open the gear menu and choose Trash. Look in the calendar that held the appointment, especially if you use separate work and personal calendars. Google keeps eligible deleted events in that calendar’s Trash for 30 days.
Restore the intended event
For a fictional example, suppose two calendars contained events named “Workshop”, one at 10:00 and the other at 14:00. Identify the deleted event by calendar and date before clicking Restore next to it. Return to the calendar grid and open the event to confirm the start time, time zone and calendar. If guests were involved, check the guest list and response status before relying on earlier replies.
If the event is missing
Check the active account and your permission to make changes to events on that calendar. Google says recurring events removed with “This and following events” or “All following” are excluded from Trash. An event already permanently deleted or past the retention window also needs another plan. If you recreate it from your own notes, confirm the time and intended guests before sending invitations.