Tales From The Crypt
Directed by Freddie Francis
Screenplay written by Milton Subotsky
The 1972 UK filmed horror anthology Tales from the Crypt is one of my favorite examples of combining Christmas themes within a horror film. The first segment presents a not so innocent Joan Collins enduring the pursuits of a murderous man in a Santa suit.
As horror anthologies go, this is a favorite; with many of the Hammer/Amicus film folks (on and off screen) participating in the production. The Amicus crew also followed this with 1973s Vault of Horror, another horror compendium based on EC comics.