Useful calendar sources

Hungarian holidays from google:

• https://calendar.google.com/calendar/ical/hu.hungarian%23holiday%40group.v.calendar.google.com/public/basic.ics

Hungarian holidays from the fossify calendar project:

• https://raw.githubusercontent.com/FossifyOrg/Calendar/refs/heads/main/app/src/main/assets/holidays/HU/public.ics
• https://raw.githubusercontent.com/FossifyOrg/Calendar/refs/heads/main/app/src/main/assets/holidays/HU/other.ics

other.ics contains International Women's Day and some other, Hungarian events.