If you're looking to regain your privacy, it's time to use Nextcloud. Storing your calendar events with Google or Apple gives them all the details on whom you're in contact with.
Links referenced for video
- https://nextcloud.com Nextcloud Homepage
- https://nextcloud.com/signup/ - Nextcloud Account Signup
- https://f-droid.org - F-Droid App Store
- https://www.akruto.com/backup-phone-contacts-calendar/export-icloud-calendar-as-ical/ - How to export iCloud calendar
- https://support.google.com/calendar/answer/37111?hl=en - How to export Google Calendar