Krampusnacht
A centuries-old Christmas tradition in Germany and other parts of Europe, Krampusnacht is said to be when the Krampus, a beasty demonic figure and the antithesis of jolly St Nick, arrives in towns to reward good children and take wicked ones away to the underworld. Similar to the concept of the Naughty and Nice List, but way, way darker.
When is it? December 5.