Gladiolen Festival returns to Olen, Belgium on May 22-23, 2026, featuring a diverse lineup spanning rock, pop, electronic, dance, and vetzakkerock genres. The festival showcases 37 artists including headliners Pommelien Thijs, Zwangere Guy, De Mens, and Coone Return To The Roots alongside emerging acts like Alice Mae, Ghost Jr., and SONS. This two-day music festival blends established Belgian talent with international artists from the UK, offering electronic dance acts like DJ Chibi Ichigo and Respect The Breakz as well as rock performances from The Skadillacs and USED. With its mix of mainstream pop artists and underground vetzakkerock acts, Gladiolen Festival caters to both casual festival-goers and alternative music enthusiasts.

Gladiolen Festival is a two-day standalone music festival.