When will the lineup be released? April 15, 2021 21:05 Updated The Firefly 2021 lineup is live! Check it out here. Related articles When will set times be released? When does the festival start and end? COVID-19 Are single-day passes available? I'm going to the festival, but not camping on site. Can I hang out with my friends in the campgrounds? Comments 0 comments Please sign in to leave a comment.