High Quality Content by WIKIPEDIA articles! Hard Rock Calling (formerly Hyde Park Calling) is an annual music festival held in Hyde Park, London, which first took place on Saturday July 1 and Sunday July 2, 2006. The music played is primarily rock music, and various performers, including Paul McCartney, Eric Clapton, The Who, Bon Jovi, Roger Waters, Aerosmith, Neil Young and Bruce Springsteen have played at the event. The festival is organised by Hard Rock Cafe and Live Nation.