If you want to see all your past & future events at one place in Google Spreadsheet, then this add-on will help you to achieve the same. This may help to track work hours if you manage it in Google Calendar or for other different use cases.

You can simply select Calendar Name in drop-down from which you want to export events from.
You can also specify From & To date if you want to export events between specific date range range.
This Add-On will help you to fetch below details with just few clicks:
Event Title,Where,Description,Created By,Created On,Start Time,End Time etc.