Here's the history of this hilarious holiday made famous by George Costanza.

Get your Festivus poles out because today, Dec. 23 has been dubbed as the official Festivus holiday. The holiday was made famous by Daniel O'Keefe, a writer for the show Seinfeld, but actually originated decades earlier by his father, as a celebration of his first date with his wife.

Here are some facts on the history of the holiday, according to Wikipedia:

Although the original Festivus took place in February 1966 as a celebration of O'Keefe's first date with his wife, Deborah, many people now celebrate the holiday on December 23, as depicted on the December 18, 1997 Seinfeld episode "The Strike. According to O'Keefe, the name Festivus "just popped into his head."

The holiday includes novel practices such as the "Airing of Grievances", in which each person tells everyone else all the ways they have disappointed him or her over the past year. Also, after the Festivus meal, the "Feats of Strength" are performed, involving wrestling the head of the household to the floor, with the holiday ending only if the head of the household is actually pinned.

Take a look at this hilarious Festivus montage from Seinfeld:

Do you celebrate Festivus?