The Trutnov Open Air Festival originated in the underground and over the years has gained popularity among broad sections of the public and lovers of music of various genres. The program includes a series of concerts on Thursday evening and the festival is in full swing by Friday afternoon. The headliners of the festival are from the world of rock and pop, alternative bands and other bands, who perform on several stages, and the program also includes Catholic and Protestant services. The anti-Communist orientation of the festival can be seen in the specially invited guests, who are famous for their resistance to this ideological movement.