 The first concert in the series is notable as the first rock festivals in Yugoslavia and perhaps the first rock festival in a communist country.The first concert in the series, considered the first rock festival in Yugoslavia, was held in Belgrade's Dom Sindikata in January 1964.The festival featured beat bands Safiri, Iskre, Lutalice, Zlatni Dečaci and singer Ivanka Pavlović accompanied by the band Valjevski Dečaci.