Substitute or moved holidays are reflected above only when officially confirmed by the country’s government sources. May 1st (Labour Day / May Day) is an EU-wide national holiday in all member countries except: Denmark, Ireland (observes 1st Monday of May), and the Netherlands. Whit Sunday / Pentecost is a National Holiday in the Following EU countries: Denmark, Estonia, Finland, Germany, Latvia, Netherlands, Poland, Slovenia, & Sweden. Whit Monday / Pentecost Monday is a National Holiday in the Following EU countries: Austria, Belgium, Denmark, France, Hungary, Luxembourg, & Netherlands.