Is there a way to purge multiple Google Calendar entires at a time? For example, is there a way to clear a day, week, or month at a time?
How do I purge appointments in Google Calendar?
google calendar
Currently there is no way to do this in Google Calendar.  You could import/export the google calendar to another web app or desktop application which has this functionality, make the necessary changes and then sync the calendar back to Google Calendar as a work around.