This is being celebrated:
The Wolfauslassen was started by herdsmen in Lower Bavaria in the 18th century. It stems from a time when wolves and bears were common in the forests of Bavaria. In order to scare the wild beasts away, the cows wore bells round their necks. This whip-cracking, or “Goaßlschnalzen”, is still an essential feature of today’s Wolfauslassen ceremony. The herdsmen were also celebrating the end of a successful year up on the mountain pastures.