It would indeed be nice to have basic Apple Calendar, as for Outlook and Google, because I do not want to use these two calendar solutions not trusting these companieIt would indeed be nice to have basic Apple Calendar, as for Outlook and Google, because I do not want to use these two calendar solutions not trusting these companies. 

I'm still wondering why odoo does not integrate a calendar connection like caldav. 

Hi,

There is a python package you can use for the integration with iCalendar, ’ics’. ics is a pythonic and easy iCalendar library. It helps to read and write ics data in a developer friendly way.

Check this out, https://pypi.org/project/ics/

Regards