I can share calendars from Proton Calendar to Thunderbird as read-only but I cannot add/amend events from Thunderbird to Proton. This is a nuisance since invites arrive in email via Thunderbird. Of course if I accept them then they are added to a local calendar, but then I can't see them in my Proton calendar.
My rather convoluted work around is to copy the event from my local Thunderbird calendar, then paste into a plain text file (using MacOS, I use TextEdit), and save with a .ics file name. I can then import this into my Proton calendar accessed with my browser. This is fine for a few events but a right nuisance for all of my calendars.
I can share calendars from Proton Calendar to Thunderbird as read-only but I cannot add/amend events from Thunderbird to Proton. This is a nuisance since invites arrive in email via Thunderbird. Of course if I accept them then they are added to a local calendar, but then I can't see them in my Proton calendar.
My rather convoluted work around is to copy the event from my local Thunderbird calendar, then paste into a plain text file (using MacOS, I use TextEdit), and save with a .ics file name. I can then import this into my Proton calendar accessed with my browser. This is fine for a few events but a right nuisance for all of my calendars.