DAVID PINTENS/AFP Fireworks at mainstage pictured during dj set of Steve Aoki at the first day of the Tomorrowland music festival on Friday 19 July 2019 in Boom, Belgium. Organizers say they don’t want to "engage in a legal battle" over local leaders' denial of a permit. Tomorrowland 2021 is no more. Organizers of the massive dance festival in Boom, Belgium, said Wednesday that they have raised the white flag once and for all after local officials last week denied the festival a permit to hold the two-weekend event, which typically draws up to 75,000 visitors a day over its six days.