Which New Year's Eve celebration is known as Silvester in German-speaking countries?

In German-speaking countries, New Year's Eve is known as Silvester.

The name refers to Pope Sylvester I, who died on December 31, 335. His feast day is observed in several Christian calendars on December 31, and his name became attached to the evening marking the end of the year in German-speaking regions. In German, the celebration is commonly called Silvester or Silvesternacht.

Modern Silvester customs include fireworks, parties, sparkling wine, countdowns, and festive meals. In Germany, the British comedy sketch “Dinner for One” became an especially familiar New Year's television tradition, despite being little known in Britain itself. Customs vary across Germany, Austria, Switzerland, and other German-speaking communities.

Silvester is not a different date from New Year's Eve. It is a regional name for December 31, just as different languages use their own terms for the same calendar occasion. January 1 is called Neujahr in German, separating the celebration eve from the first day of the new year.