Which concert traditionally takes place on New Year's Day, rather than New Year's Eve, in Vienna's Musikverein?

The Vienna New Year's Concert traditionally takes place on New Year's Day at Vienna's Musikverein.

The concert is performed by the Vienna Philharmonic and is best known for music by the Strauss family, especially Johann Strauss II. The program commonly includes waltzes, polkas, and marches, and the Radetzky March traditionally accompanies audience clapping near the conclusion.

The concert began in 1939, with Clemens Krauss conducting. It is now broadcast internationally and has become one of classical music's most recognizable annual events. Although rehearsals and related performances occur around the holiday period, the famous televised concert is held on January 1.

That date is the key distinction in this question: the Vienna event is often casually grouped with New Year's Eve celebrations, but its principal performance belongs to New Year's Day. The Musikverein is Vienna's historic concert hall and home of the Golden Hall.