https://github.com/Wysie/icalgen
iCalendar (.ics) File Generator. Contribute to Wysie/icalgen development by creating an account on GitHub.
ics filegithubicalendargenerator
https://www.dupinout.com/download-google-calendar-events-reminders/
Easily learn how to export Google Calendar event data. Step-by-step guide to help you securely export calendar events.
google calendarevent dataics fileexportexcel