Walpurgis Night is a traditional spring festival celebrated on April 30th in northern Europe and Scandinavia. It originated from pagan spring celebrations but became associated with Saint Walpurga. In many countries, the night involves dressing up, lighting bonfires, singing folk songs, and warding off evil spirits. Modern celebrations in Estonia, Finland, Sweden, Germany, and the Czech Republic still incorporate traditions of costumes, pranks, drinking, and burning effigies to symbolize the end of winter.