What is the name of Vienna's famous annual classical-music event held on New Year's Day?

Vienna's famous annual classical-music event held on New Year's Day is the Vienna New Year's Concert.

The concert is performed by the Vienna Philharmonic and is best known for waltzes and polkas by the Strauss family, especially Johann Strauss II. It takes place in the Musikverein's Golden Hall, a richly decorated venue whose acoustics and architecture have become part of the event's identity.

The first concert in the series was held on December 31, 1939. After World War II, the event moved permanently to New Year's Day in 1941. Since then, it has become an international television tradition, reaching viewers in many countries.

The program is not completely fixed: the orchestra normally includes several encores, including the Blue Danube and the Radetzky March. The conductor changes from year to year, chosen by the orchestra. Despite its celebratory style, the concert is a formal classical performance rather than a public street festival.