Welcome to the Holiday Calendar Project

The Holiday Calendar Project is an open source effort to provide reliable, reusable libraries for defining and calculating the various holiday calendars around the world. Holiday date calculation is one of the oldest types of complex computation, and the goal of this project is to provide correct holiday dates for all use cases in a multitude of popular programming languages.

Holiday Calendars

For every supported programming language, the holiday-calendar-* libraries will provide these calendars:

Australian national holidays
Major African national holidays
Major Asian national holidays
Major European national holidays
Major North American national holidays
Major South American national holidays
World financial & central bank holidays