There is no official release date for Geometry Dash 2.21 as of now. Developer Robert Topala (RobTop) has shared ongoing development previews on social media, but no specific launch date has been announced. Past major updates (like 2.2) took several years to complete, so while 2.21 is expected to be smaller in scope, a release date remains unconfirmed. For the most current news, check RobTop’s Twitter/X or the Geometry Dash subreddit.