Which Vienna concert, first held in 1939, is performed annually on New Year's Day?

The Vienna New Year's Concert, first held in 1939, is performed annually on New Year's Day.

The concert is presented by the Vienna Philharmonic in Vienna's Musikverein, most famously in the building's Great Hall. Its program focuses mainly on music by the Strauss family and related composers, especially Johann Strauss II, whose waltzes and polkas define the event's sound.

The first concert took place on 31 December 1939, rather than on New Year's Day itself. It was called a New Year's Eve concert, and the event adopted its familiar New Year's Day timing in 1941. Since then, the performance has become an international broadcast tradition, reaching audiences across many countries.

The concert traditionally ends with the “Blue Danube” and the “Radetzky March,” though the audience applauds along with the latter. These encores are famous, but they are not the concert's entire program.