The Supabase team is hosting a 10-day open-source hackathon to celebrate their special announcement, starting on April 12th and ending on April 21st. Participants have 10 days to build an open-source project using Supabase in some capacity, with the opportunity to win prizes for various categories such as best overall project, use of AI, most fun, and visually pleasing projects. The hackathon is open to individuals or teams of up to four people, and submissions must be made before the deadline, with extra points awarded for video demos. The Supabase team will judge the winners based on creativity, functions correctness, visual appeal, technical impressiveness, and use of Supabase features, with a focus on fun. Participants can find resources and community support throughout the event, including live building in the Discord server.