Krampusnacht is celebrated on the night of December 5th, the eve of St. Nicholas Day. This tradition is particularly popular in parts of Europe, especially in Austria and Germany. On this night, people dress up as Krampus, a horned figure from folklore who is said to punish naughty children, contrasting with the benevolent St. Nicholas who rewards the good. During Krampusnacht, revelers often participate in parades and festivities, showcasing elaborate costumes and masks. The event serves as a reminder of the dual nature of the holiday season, blending both the joyful and the cautionary aspects of Christmas traditions.