When is Walpurgis Night celebrated?

Walpurgis Night, also known as Saint Walpurga's Eve, is the eve of the Christian feast day of Saint Walpurga, an 8th-century abbess in Francia, and is celebrated on the night of 30 April and the day of 1 May. This feast commemorates the canonization of Saint Walpurga and the movement of her relics to Eichstätt, both of which occurred on 1 May 870.

Saint Walpurga was hailed by the Christians of Germany for battling "pest, rabies and whooping cough, as well as against witchcraft." Christians prayed to God through the intercession of Saint Walpurga in order to protect themselves from witchcraft, as Saint Walpurga was successful in converting the local populace to Christianity.