Thank you for your feedback! Note that shared calendars are supported: https://proton.me/support/share-calendar-with-proton-users https://proton.me/support/shar

Thank you for your feedback! Note that shared calendars are supported: https://proton.me/support/share-calendar-with-proton-users https://proton.me/support/share-calendar-with-proton-users. Currently, only Proton users can edit the calendars, though. The other two suggestions have been passed to our team internally.