Bulk Edit Calendar Events is a script written in Google Apps Script. The goal is to allow any user to edit calendar events in...well....bulk. Currently the only way to edit more than one event at once is if the events are part of a recurring series. This program allows (amongst other things) mass deletion, renaming, and moving.
You can use the program here: https://docs.google.com/spreadsheets/d/1YRylapVSejmJJiwzqwFxJvNK7_E__gSM8isaIf-XouU/edit#gid=1639798387
If you find a bug, please submit an issue here: https://github.com/derekantrican/Bulk-Edit-Calendar-Events/issues
If you come up with something you would like to see as a feature in this program PLEASE CHECK THE WIKI FIRST (https://github.com/derekantrican/Bulk-Edit-Calendar-Events/wiki) - your feature request may already exist in a different program. If not, then submit an issue here: https://github.com/derekantrican/Bulk-Edit-Calendar-Events/issues
Donations are always accepted :) if you would like to show your appreciation to the developer, go here: http://goo.gl/omxoQU