Delete Google Calendar Events by keyword and date range

Search a date range in Google Calendar and match any events with a given string, then delete those events.

Search for and delete Google Calendar events

The following Google Apps Script is designed to search a date range for Google Calendar events containing a given string (something to help target those events) and then delete them.

There are 4 items at the beginning of the script to complete for your requirements:

1. Start date – format mm/dd/yyyy – forms the date range to look for events within.
2. End date – format mm/dd/yyyy – forms the date range to look for events within.
3. Search string – bit of text that is unique to the events you wish to delete to differentiate them from other Calendar events you may not wish to remove. Note: is not case-sensitive and will not pick-up search string inside of another word eg ‘the’ in ‘there’.
4. Calendar ID – typically your email address for your personal Google Calendar to search for events in.

Source: The Gift of Script: Delete Google Calendar Events by keyword and date range