COSMA-CON: Day Zero is a one-day convention and music festival hybrid with lots of FREE interactive fan experiences, focused on Creators, Originators, Storytellers, Makers, and Artists. The event will feature celebrity and community panels, curated vendors and exhibitors, live large and up and coming local and national musical performances. So much to do across our three venues of Boise Centre, Idaho Central Arena, and the Grove Plaza around gaming, entertainment, cosplay, art, music, food, drinks and so much more!