Undeleting events in Google CalendarIf you have accidentally deleted one or more events in Google Calendar, you can undelete them using the "Trash" on the Google Calendar website:
Google Calendar does not really delete events, the events are just marked as deleted. This is necessary so that programs that sync with Google Calendar can be informed which events have been deleted.
You can find nearly the same function under "Settings > Debug Tools > Deleted events". There you can also see the deleted events of each of your calendars and can undelete them.
GCTool(Mac Download, Windows/Linux Download).
As an alternative you can use the Java program here. It can also view and restore deleted events.
On Windows/Linux you need to have Java installed. If you don’t have Java, install it from http://www.java.com.
After starting it you first have to sign in and allow the program to access your calendar:
Then you should see the window below. Select a calendar, click on "Load recently deleted events", select one or more events to undelete and undelete them by clicking on "Undelete selected events". You can select multiple events by selecting the first one and clicking on the last one while holding SHIFT (to select that range of events).
After a few seconds the selected events should vanish from the list because they are no longer deleted. Now click “Refresh” in Google Calendar or reload the website in your browser to see the undeleted events: