Krampusnacht is celebrated on December 5 every year across Germany, other European countries, and Australia. It occurs the night before the celebration of the Feast of St. Nicholas, a night when people dress up as the devil Krampus and chase naughty children through the streets, beating them with a bundle of birch branches.
The tradition of Krampusnacht dates to AT LEAST the 6th century CE, and is likely to have originated in pre-Christian times.
Have a happy holiday season, and don't forget to check out my artworks in my various collections in my profile. Enjoy.