of the holiday is Walpurgisnacht in German and Dutch , Valborgsmässoafton in Swedish , Vappu in Finnish , Volbriöö , ( Walpurgi öö ) in Estonian , Valpurgijos naktis in Lithuanian , Valpurģu nakts or Valpurģi in Latvian , čarodějnice or Valpuržina noc in Czech , chódotypalenje Lower Sorbian and chodojtypalenje