Which annual New Year's Eve concert is held by the Vienna Philharmonic in Vienna's Musikverein?

The Vienna Philharmonic's annual concert at the Musikverein is the Vienna New Year's Concert.

The concert is performed in Vienna's Musikverein and is best known for music by the Strauss family, especially Johann Strauss II. Its program usually includes waltzes, polkas, and other works associated with nineteenth-century Viennese dance culture. The performance is broadcast internationally and has become one of the world's most recognized classical New Year's events.

The first concert in the tradition took place on December 31, 1939, during the period of Nazi rule, and later concerts settled into the New Year's Day format. The event is now held on January 1, while preview performances take place beforehand.

The Radetzky March is a famous audience-participation encore, with spectators traditionally clapping along. Despite its name, the concert is not held at midnight on New Year's Eve; its principal performance takes place on New Year's Day.