Get a big aluminium pole. Don't decorate it. Stick it in the center of your living room. Have dinner. It doesn't matter what, but meatloaf is suggested. No alcohol. During dinner, talk about everything you don't like about everyone at the table. Finally, the male head of household must challenge a person to wrestle him. The person may decline if they have something else to do. Festivus is not over until he is pinned to the ground. And that's the meaning of Festivus. Dammit. Can a mod please change that to "days?"
I have no idea what it is. And I am American. Now, what is the pole for? And why can't I decorate it?
The pole is to decorate your house in the name of Festivus. You can't decorate it because tinsel is distracting. That goes for other decorations too.