In my family, we have a tradition of reading Henry Wadsworth Longfellow's poem "The Landlord's Tale; Paul Revere's Ride" every year on the 18th of April.
It's sort of a game (especially between my father and his brother) to see who can recite the most lines from memory. Usually everyone sort of trails off after the first two stanzas and then we have to consult the actual poem.
Anyone else's family do this? Or does your family have some other bizarre literary tradition of it's own? Share it in the comments.