https://proton.me/ro/support/calendar-notifications-desktop-browser
Proton Calendar desktop browser notifications | Proton
Proton Calendar supports browser notifications in all popular modern browsers. Learn how to switch them on and off.
proton calendardesktop browsernotifications
https://discuss.grapheneos.org/d/3605-cant-reinstall-update-or-open-proton-calendar/3
Can't Reinstall, Update, or Open Proton Calendar - GrapheneOS Discussion Forum
GrapheneOS discussion forum
proton calendarreinstallupdate
https://play.google.com/store/apps/details?id=me.proton.android.calendar
Proton Calendar: Secure Events - Apps on Google Play
Private calendar: Reminders, schedule planner, calendar widget, time-management
proton calendarsecureeventsappsgoogle
https://www.techradar.com/news/proton-calendar-finally-accessible-to-everyone-worldwide
Proton Calendar finally accessible to everyone worldwide | TechRadar
Nov 30, 2022 - The provider believes Proton Calendar will make a huge difference, especially for those under limited internet freedom.
proton calendarfinallyaccessibleeveryoneworldwide