Walpurgis Night
Walpurgis Night (Valborgsmässoafton in Swedish, Vappu in Finnish, Volbriöö in Estonian, Valpurģu nakts or Valpurģi in Latvian, Walpurgisnacht in German), Čarodějnice in Czech is a holiday celebrated on April 30 or May 1, in Finland, Sweden, Bohemia (Czech Republic), Estonia, Latvia and Germany.