Wiz Khalifa and Lil Wayne will headline a free music festival at Civic Center Park in Denver on May 21, 2016, as part of the rescheduled Denver Annual 420 Rally, according to a press release from the rally’s producers.

“On April 16, a significant snowstorm hit Denver and forced us to postpone what was slated to be the largest 420 event in the world,” said Santino Walter, Producer of 420 Rally and President of Colorado Marijuana Company. “We apologize for any inconvenience this caused attendees and vendors—we would not have rescheduled this event if it wasn’t absolutely necessary.”

Walter also said, “We would like to thank all the major parties—Wiz Khalifa, Lil Wayne, MassRoots, Wright Event Group, the City of Denver, Sweet Leaf, and Amber Ice—for their diligent work over the past few days in planning what will be an even bigger and better festival on May 21.”

The rally’s site to register for free tickets and All Access Passes is 420Rally.co.