The dates have been confirmed for the 2nd annual Firefly Music Festival. The event will take place June 21-23 at The Woodlands of Dover International Speedway in Dover, DE. The lineup for the festival has not yet been released but General Admission pre-sale weekend passes have already sold out, and further ticketing information should be released shortly. Firefly has also announced that they will be adding “The Grove,” a new and improved off-site camping experience. Last year’s event featured performances by The Killers, The Black Keys, Jack White, Death Cab for Cutie, John Legend, Bassnectar, Modest Mouse, The Flaming Lips and more.