"Happy Festivus" is the traditional greeting of Festivus, a holiday featured in "The Strike" episode of Seinfeld which first aired on December 18, 1997.

Since then, many people have been inspired by this zany, offbeat holiday and now celebrate Festivus as any other holiday.

Festivus is celebrated each year on December 23rd. However many people celebrate it other times in December and even at other times throughout the year.

The slogan of Festivus is "A Festivus for the rest of us!"

The usual holiday tradition of a tree is manifested in an unadorned aluminum pole, which is in direct contrast to normal holiday materialism.

Those attending Festivus may also participate in the "Airing of Grievances" which is an opportunity to tell others how they have disappointed you in the past year.

This is followed by a Festivus dinner (pretty much your choice)

Festivus must be completed with the "Feats of Strength" where the head of the household must be pinned. Tradition states Festivus is not over until the head of the household is pinned. Failing to pin the head of the household results in Festivus continuing until such requirement is met.

Also a part is the celebration is the labeling of easily explainable events as "Festivus miracles".

Check out the above video from 'The Strike' episode of Seinfield for the full story...and Happy Festivus!