From
http://www.themouseforless.com/walt-disney-world/planning/events/night-of-joy/
Night of Joy is a contemporary Christian music festival held each year on a Friday and Saturday in September. Night of Joy will take place at ESPN Wide World of Sports. Guests will get admission to the ESPN Wide World of Sports, as well as have the option to purchase a special ticket that includes access to one of the four Walt Disney World theme parks. From 6:00 p.m. to 1:00 a.m. each night, enjoy fun and fellowship, as well as enjoy live performances by today’s top bands in contemporary Christian rock, pop and gospel. This event requires a special ticket.
I guess there is speculation that it might be moved from ESPN Wide World of Sports. It was at Wide World of Sports in 2016 and 2017. In 2015, 2014 and 2013 performances were at Castle Forecourt Stage, Galaxy Stage and Rockettower Stage in the Magic Kingdom. I'm not going to Google further back than that because I'm hungry.