Filter Facebook events before exporting them to your calendar (ical format)
Facebook provides a way to export and sync all your events to a third party calendar application such as Google Calendar, Apple Calendar or Outlook. However they include invites for events not yet responded to. This service can declutter your calendar by filtering out those events.
The URL should look similar to this: https://www.facebook.com/events/ical/upcoming/?uid=6246345&key=6SAh6345G5
Note that it might take up to 24 hours for changes to show in your Google Calendar or other calendar clients
Or you can manually subscribe to the calendar with the following URL: