For those unfamiliar with the holiday it is celebrated on December 23rd and refered to as the holiday for the rest of us. Started when Frank Costanza got into a fight in a toy store when he and another man both grabbed for the last doll in the place. Frustrated at the commercialization of Christmas, Frank created Festivus.
Some highlights of Festivus - The Festivus Pole - Not a tree, a pole. No decorations. Tinsel is very distracting from the true meaning of the holiday. The pole is tall, silver, hollow, long, skinny, and heavy.
The Airing of Grievances - This is the part of the holiday where you tell your family and friends all the ways they have disappointed you during the year.
The Feats of Strength - This is the time during the celebration where the head of the family tests his strength against one lucky person. Festivus is not over until the head of the family is pinned. You are allowed to decline only if you have something to do instead.