When will Defqon.1 2025 take place? November 15, 2024 11:20 Defqon.1 2025 will take place from June 26th to 29th. For more information please check the FAQ of Defqon.1. Related articles How can I personalise my tickets? Is it possible to visit Defqon.1 from Friday till Sunday? When can I personalise my tickets?