When do day pass tickets go on sale--how will I know?

I am floating the Gunnison for a few days ending 6/23 and would like to drive up to Telluride and see the Festival on Sunday for the last day. When will the daily tickets go on sale? I need to get a room, flights, etc–can I be sure of getting a ticket for that day? Is there a way to be notified when they are about to go on sale? Thanks!!

The best way to get notified is to join The Planet’s newsletter. They include pretty much everything in those announcements.