This utility add-on is designed to give you access to your Calendar data.    Customize your report to choose from over a dozen calendar event attributes and select whether to run an event report or a participant report.  

Here is how it works.  Use the Set Up Report function from the Add On menu to specify which calendars and event attributes you want to export.  When you run the calendar report, a new tab called CalData will be inserted into your sheet and your data will be added to it.  If the CalData tab already exists when the report is run, data already in the sheet will be replaced by the new report.