Walpurgis Night is celebrated on the night of April 30th, primarily in Central and Northern Europe. It marks the eve of Saint Walpurga, a Christian saint, and is associated with ancient pagan traditions. People believed that witches gathered on this night to celebrate and perform rituals, often lighting bonfires to ward off evil spirits. In modern times, Walpurgis Night is observed with festivities, including parties and gatherings. In countries like Germany and Sweden, it is common to see people enjoying music, dancing, and fireworks. The night symbolizes the arrival of spring and the end of winter's darkness.