Festivus is a made-up holiday created for a show called Seinfeld. It's celebrated on December 23rd, and the traditions include setting up a Festivus pole (a bare aluminum pole instead of a Christmas tree), having a big dinner with friends and family, and playing a game called the Feats of Strength. There are also usually funny stories told that are related to the holiday. After the dinner, people exchange presents and the holiday ends with the saying of the Festivus motto "A Festivus for the rest of us!"