While most know the holiday from Seinfeld, the actual inventor of Festivus is Dan O'Keefe , whose son Daniel was a writer on the show.
Festivus is a secular holiday celebrated on December 23rd as an alternate to the pressures and commercialism of the Christmas season
Celebrating of Festivus usually involves 5 steps
1. Get a Festivus Pole - an unadorned aluminum pole on a stand . It has to be aluminum so it has a very high strenght-to-weight ratio.
2. Prepare a Festivus dinner - the meal should include meatloaf served on a bed of lettuce
3. Air your grievances - at the beginning of the meal force your guests to listen to all the times they've disappointed you this year
4. Join in the Feats of Strength - As the host, you'll want to test your strength and wrestle one of the guests. Festivus is not considered over until the host is pinned to the floor. A guest can only decline the challenge if they are scheduled to work a double shift
5. Call all slightly non-routine events 'Festivus miracles' - exclaim each loudly and proudly