Berchtoldstag is a holiday celebrated in Switzerland and Liechtenstein on Jan. 2. It celebrates Duke Berchtold V and the founding of Bern.
Beyond its historical meaning, the feast day may allude to the word “berchten” which means to walk around asking for food. It’s also possible that it alludes to a word from the Middle High German “berhttac,” which means epiphany. The holiday seems to have taken hold in areas where Protestantism abolished the traditional celebration of Epiphany. So Berchtoldstag can serve as a sort of a replacement New Year / Epiphany celebration.
Gatherings, folk dancing, and feasts are traditional ways to celebrate. There is also a large focus on eating nuts and nut-based activities. Children make hocks, four nuts placed together with a fifth placed on top.
In Hallwil, there is a parade which includes characters: the jumpfere dressed in white, the spielchärtler wearing a robe of playing cards, a character wearing holly or fir branches or straw, an old woman who sprays water from a pan, and the schnäggehüüslig wearing a snail shell.
I had never heard of this holiday until about a month ago. It sounds like a light-hearted, fun holiday.

