Joy erupted in Barcelona with Barça's recent football league victory. Among the most chanted songs by supporters and members of the 'blaugrana' team, 'Un dia de partit' stands out. This song was one of the most emotional moments of the celebration parade, with players and fans singing it as the bus made its way through the city streets.

The origin of this popular tune is found in the Italian song 'L'estate sta finendo' by the Turin group Righeria. It was initially adopted by fans of Aquila, a lower-tier club, and later became popular in the 2015-2016 season thanks to Napoli supporters. Although the lyrics adapt to each club, the rhythm and melody remain unchanged.

In Barça's case, 'Un dia de partit' began as a chant by the fan group Dracs 1991, who cheer on the section teams at the Palau Blaugrana, before making the leap to the football stands. The song has been a great success both at the Camp Nou and the Estadi Olímpic de Montjuïc, as well as among the players themselves.

The popularity of the chant has spread beyond Barça. Espanyol fans have also adapted it with the title 'Un día como éste', and clubs like Europa and Sant Andreu also sing it during their matches. The Eskapulats, Europa's radical fan base, claim to have been the first to sing it in Catalan.