In this article I will point out to the role of music in the Day of Youth, the most important state holiday in the socialist Yugoslavia. I will show that in the afterwar period, the music for the jamboree was selected in order to highlight certain important events from the People’s Liberation Struggle, so that it consisted in the combination of traditional, partisan and folk songs, and it was regularly related to Tito himself. After Tito’s death in 1980, the Day of Youth was in crisis, together with the country, but despite that, the celebrations were organized almost until the very end of Yugoslavia. The celebrations after Tito were marked by a tendency to overcome the crisis of the ideology of “brotherhood and unity,” so that it was concluded that the Day of Youth should be modernized. I argue that the music played a crucial role in the process, leading to the promulgation of rock and roll as “our future,” i.e. the future of the young. The collectivities that were represented in the jamboree also changed in accordance with the music, so that those in the 1980s included casual rock and roll dancing instead of traditional round dances.