Berchtold's Day (Berchtoldstag) is observed in parts of Switzerland, Liechtenstein, and Alsace every January 2. This Alemannic holiday is recognized as a public holiday in 14 of the 26 cantons of Switzerland, particularly in German-speaking regions such as Bern, Zürich, and Zug. The holiday's name likely honors Berchtold V, Duke of Zähringen, who is said to have founded the city of Bern in 1191 after encountering a bear during a hunt. Celebrations include mask parades, folk dancing, singing, and festive meals at pubs, with nuts playing a significant role in games and feasts. Various theories also link the holiday to Berchtold of Engelberg, a Benedictine monk, and to the Germanic goddess Berchta.