New Year's Day: 'Terror Train' (1980)

© 20th Century FoxRing in the New Year with this tale of a group of college kids who hop a party train to celebrate New Year's. However, a prank they committed years before comes back to haunt them when a Groucho Marx-masked killer hunts them down one by one. "Either he's dead, or my watch has stopped!"
See also: Steel Trap, Bloody New Year, The Shining, New Year's Evil, End of Days.
President's Day: 'The Tripper' (2007)

© After DarkA group of hippy-types attending a rave in the middle of a forest fall prey to a right-wing killer dressed as Ronald Reagan whose father was a tree-hugger-hating logger. Presidents were meant to be feared.
See also: "The Washingtonians" (Masters of Horror).
Valentine's Day: 'My Bloody Valentine' (1981)

© ParamountWhat could be more romantic than watching a love story about a man and his love of killing others? A killer dressed as a miner stalks the residents of a small town when they decide to hold a Valentine's Day dance 20 years after the last dance created a diversion that resulted in the deaths of several local miners. Since then, dances had been banned. It's like
Footloose with massive trauma.
See also: Valentine, My Bloody Valentine 3-D, Hospital Massacre, Lover's Lane, Tales from the Crypt.
St. Patrick's Day: 'Leprechaun' (1993)

© TrimarkAssuming you're not too busy drinking or pinching people who don't wear green, catch this campy flick about a leprechaun set loose from a trap after 10 years only to discover that his precious gold has been taken. He sets about killing anyone who gets in between him and his gold -- including
Jennifer Aniston.
See also: Leprechaun 2 through 6.
April Fool's Day: 'April Fool's Day' (1986)

© ParamountRich girl Buffy's birthday bash on a deserted island on April 1st turns into a bloodbath when a mysterious killer begins bumping the guests off -- until the
twist ending, that is. Fool me once, shame on you, fool me twice, I'll punch you in the head.
See also: April Fool's Day (2008), Killer Party, Slaughter High, April Fools.
Easter: 'Easter Bunny Kill! Kill!' (2006)

© Under the BedA pair of men who abuse a mentally challenged boy get their comeuppance when a killer dressed in a Easter bunny mask enters the picture carrying power tools.
See also: Critters 2, Peter Rottentail, Night of the Lepus, Kottentail, Resurrection.
Arbor Day: 'The Happening' (2008)

© 20th Century FoxWhile you're out celebrating the foliage, consider watching
this movie about the systematic eradication of man by shrubbery as a reminder that trees should not be trusted.
See also: Trees, The Evil Dead.
May Day: 'The Wicker Man' (1973)

© Anchor BayIf you're one of the few who still find themselves dancing around a maypole once a year, you may want to watch some kindred spirits in this film about a pious Christian policeman who investigates the case of a missing girl on an island inhabited by pagans preparing for their May Day festival. No doubt the insistence on farm animals diminished the holiday's popularity in the US.
Memorial Day: 'Memorial Day' (1999)

© MaverickIt's only appropriate that a holiday honoring the dead would have a movie in which people become dead. On Memorial Day, a group of young adults returns to the spot where one of their friends died as they all partied, oblivious to his peril. Now, three years later, they find themselves in peril as a masked killer (Is there any other kind?) hunts them down.
See also: Memorial Valley Massacre.
4th of July: 'Uncle Sam' (1997)

© EliteThe body of a psychotic Gulf War vet named Sam is shipped home, only to return to life during the Independence Day festivities, donning an Uncle Sam suit and commencing to slaughter un-American-types: flag burners, draft dodgers, tax evaders and
American Idol haters.
See also: I Know What You Did Last Summer, Jaws, Cape Fear.