Season 9, Episode 10: "The Strike"

If there's no Human Fund, those donation cards were fake.

You better have a damn good reason...

...why you gave me a fake Christmas gift.

Well, sir, I gave out the fake card because...

...I don't really celebrate Christmas.

I celebrate Festivus.

-Vemonus? -Festivus, sir.

And I was afraid that I would be persecuted for my beliefs.