An alternative holiday to Christmas, Hanukkah, Kwanzaa, etc. Observed from December 1st through the 25th this holiday celebrates the single greatest holiday movie of all time, Die Hard.
Mike - I'm so sick of the over commericalization of Christmas.

Joe - Why don't you celebrate the 25 days of Die Hard instead?
Mike - Yippie-kai-yay, motherfucker!
by YaakaFett September 23, 2009
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