Although of course only the Thursday of Ascension is an actual public holiday, the Friday is taken off by many people, institutions and companies too, and then the weekend of the week after is Pentecost with the Monday off.

In here we have Easter Monday, Ascension, Pentecost Monday, Mary's Ascension on August 15th, All Saints and then Christmas Day - though few people work on either Christmas Eve (at least not in the afternoon) or Boxing Day, either.

However, religious holidays of other formally recognized religions are accepted, too - just not as official public holidays, I guess, in the sense that only companies or institutions with primarily or exclusively employees of the religion in question will be closed, and in the sense that Muslim or Jewish employees wishing to work on Christian public holidays will have a rather hard time doing that in their office or usual workplace.

This country definitely doesn't have separation of church and state in a very strict way... we (and most other European countries) just violate it in entirely different ways than the US does, is all. Although I have to admit that the state paying the wages of priests/rabbis/imams is a fairly extreme violation of said separation, alright...