Turns out Festivus -- "America's favorite made-up holiday" -- didn't start with that crazy Seinfeld episode. It was created decades before by the father of Daniel O'Keefe, the writer who penned the memorable show.
The Festivus rituals are the same, though: "a night of airing grievances, feats of strength and, of course, the aluminum Festivus pole," CBS 22 reports.
The whole things sounds fun, including the "feats of strength."
"This usually means wrestling," says Pennsylvania real-estate broker and Festivus celebrator Jack Munch. "I've seen parties where it deteriorates into five people wrestling in the snow in the backyard. The whole thing is a blast. You never know what's going to happen on Festivus."