After last night's update players have reported new blilboards in Sacred Grove. Apparently The Dares, who perform the Free Realms theme song, will be in-game in Snowhill on June 2nd, 4pm Pacific time. According to a forum post by Pex, "It's at that time because this will be a simultaneous live stream with a live concert the Dares will be performing. More details as I have them."
Thanks to all the alert ZAM Free Realms players who sent in pictures! Here's a handy Time Zone Converter to help you plan!