[From proton subreddit]
We are happy to announce that public holidays are now available in Proton Calendar.
You can now incorporate public holidays in your calendar and plan long weekends ahead, avoid scheduling conflicts, and be more efficient with your schedule.
Browse the list of available countries and select yours to get started.
Learn more from our support site : https://proton.me/support/public-holiday-calendars
can you add the option to choose holidays based on the state? many public holidays are just for some states/regions in many countries.
No just the country