The “Seinfeld”-created holiday of Festivus is for those who are more apt to embrace their inner “bah, humbug!” than their Christmas spirit.

As a card sent to him by his father reminded George in the 1997 episode, Festivus comes every Dec. 23. In real life, it was invented by the father of former “Seinfeld” writer Dan O’Keefe in 1966. O'Keefe incorporated it into the show when he wrote "The Strike" episode.

Actor Jerry Stiller had so many career highlights and so many great moments on "Seinfeld," but one stands out so much it's now a holiday: Festivus.

Festivus is a wacky holiday popularized in a 1997 “Seinfeld” episode. Billed as “Festivus for the rest of us,” the holiday is celebrated by the Costanza clan on Dec. 23 as an all-inclusive, secular alternative to Christmas consumerism.

Explore the origins and traditions of Festivus, from the Airing of Grievances to the iconic unadorned aluminum pole.

Born from a 1997 episode of "Seinfeld," Festivus has grown in popularity into becoming a holiday celebrated the world over.

As Frank explains it in the episode, he created Festivus after he went out to buy his son George (Jason Alexander) a doll for Christmas. But it was actually invented by the father of Seinfeld writer Dan O’Keefe in 1966,