In Austrian Christmas tradition, the evening when Saint Nicholas’s frightening companion appears on December 5 is called Krampusnacht.
Krampusnacht means “Krampus Night.” It takes place on December 5, the eve of Saint Nicholas Day. During the custom, people dressed as Krampus may parade through streets or visit homes. Krampus is depicted with horns, fur, a long tongue and a bundle of birch branches, contrasting with the benevolent Saint Nicholas.
The tradition is especially strong in Alpine regions, including Austria, Bavaria and parts of neighboring countries. Local events vary considerably: some are family-oriented visits, while others are large public Krampus runs with elaborate costumes.
Krampusnacht should not be confused with Perchten traditions, which involve other Alpine masked figures and often belong to winter customs around the Rauhnächte. The dates and characters can overlap regionally, but Krampusnacht specifically centers on Krampus and December 5.