The Reformationstag is celebrated on 31st October each year. It is the day on which in 1517 Martin Luther nailed his 95 theses to the church door in Wittenberg, critising certain aspects of the Catholic Church and thus starting the Reformation in Germany.
It is a bank holiday mainly in the eastern part of the country.
To hear a simple explanation in German, listen to the podcast:
(Press the “play” button to listen to the podcast)