Вальпургиева ночь
Valborgskalaset (Swedish for "Walpurgis Night party")is, according to its host FestU, Sweden's biggest party. It takes place on Chalmers on the 30th of April every year in the Chalmers student union building, to celebrate Walpurgis Night. The party usually have 11 to 12 bars serving drinks, 8 dancefloors and a scene with live performances.