What is the name of Denmark's New Year's Eve custom of jumping off a chair at midnight?

Denmark's New Year's Eve custom of jumping off a chair at midnight is commonly called “jumping into the New Year.” Participants stand on a chair or another raised surface and jump down as the clock reaches twelve.

The action is intended to symbolize entering the new year energetically and leaving the old one behind. It is a familiar Danish household tradition, often performed alongside a midnight toast and the broadcast of the monarch's New Year's speech.

The custom is sometimes described as a superstition rather than a formal ceremony. Its exact history is not as clearly documented as traditions such as Spain's twelve grapes or Japan's temple bells, so claims about a single inventor or precise origin should be treated cautiously.

Danish celebrations also include fireworks and the eating of kransekage, a ring-shaped marzipan cake. The chair jump is specifically Danish and should not be confused with general countdown celebrations elsewhere.