Black Christmas (1974)

1974 - R (or Worse) - 7/10 - A Blueprint With Some Rough Edges.

Like The Burning, The Amityville Horror, or The Blair Witch Project this movie is a clear blueprint for a lot of holiday horror that came after. Trigger warning that one of the characters is getting unwanted perverted phone calls and the caller really goes there with the dialog. It is meant to make you uncomfortable and even being 50 years old, it still does its job. Everthing else in this movie is now seen as a by-the-books slasher but you can tell this is early in the genre and unique for blending in the Christmas vibes.