The documentary-music programme "Opatija 1996. – Time Travel of Group 4'33" was held at the Gervais Centre in Opatija to mark the 30th anniversary of the founding of the Opatija vocal group, Group 4'33". After an 11-year hiatus, the group's members reunited specifically for this occasion.

The programme was not conceived as a classic anniversary concert, but as a complete and moving journey through time. Through a rich archive of material – photographs, video recordings and documentary excerpts – the audience was guided through the group's 19-year-long activity by its founder and director, scientist and musicologist Dr sc. Diana Grgurić. She was assisted by a young hosting duo, Matej Kovač and Natali Kuljanac.

A special part of the evening was dedicated to the group's key moments and authorial breakthroughs — from the debut "Dobro jutro, Opatijo" and the tourist video spot "Stara dama", to the music-scenic projects "DisCoral" and "Vidih vodu". Pianist Vladimir Babin and composer, arranger and producer Aleksandar Valenčić provided the musical accompaniment on stage.

The audience rewarded the performers with prolonged applause and ovations, and the strong connection with the performers resulted in two encores. Diana Grgurić stated that they did not just want to hold a concert and sing a few songs, but to remind people of a certain time, the people who passed through the group and the city that left a mark on everything they did. She emphasised that the most important things left behind were the people, friendships and memories that last, and she called the evening a celebration of togetherness and love for Opatija.

After the official part at the Gervais Centre, the celebration and socialising of members, collaborators, friends and the audience continued at an afterparty at the Opatija restaurant Ružmarin.