Need the details on the greatest party of 2004? You've come to the right place. Get the scoop below: When Is Festivus 2004? Also see a schedule of events. What Is Festivus? And what are these crazy events? Where is it? Get directions and a map. View extras like videos explaining Festivus, as well as goodies from the infamous Seinfeld episode, and the prize list. You can RSVP online.