Šťastné a veselé!

Here in Slovakia we say Šťastné a veselé! as Christmas greeting. And as my small gift, here is just another HolidayCalendar.java class and its descendants:

• SlovakHolidayCalendar.java
• CzechHolidayCalendar.java as well as
• DutchHolidayCalendar.java

You will also need AgeCalculator.java to compile the above sources.

And here is the documentation.

Enjoy!