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Database of ICS files for non working days
List Your Service
List your Service and make it available to the worldData on national, regional, and religious holidays via API
Worldwide Holidays and Working Days
Catholic liturgical calendar
Lookup for a name and returns nameday date
Display, create and modify Google calendar events
Convert between Gregorian and Hebrew, fetch Shabbat and Holiday times, etc
Historical data regarding holidays
Protestant liturgical calendar
A (satirical) Evangelical liturgical calendar
Public holidays for more than 90 countries
Provides namedays for multiple countries
Check if a date is a Russian holiday or not
Bank holidays in England and Wales, Scotland and Northern Ireland
A REST API to convert UnixTime to DateTime and DateTime to UnixTime