Forgotten Movie

My turn to ask for help remembering the title of something, I guess.
I'm trying to remember the name of a movie. It was a typical high school horror. From what I remember, a nerdy high school student does a presentation on... witchcraft, a demon, Halloween, something that I can't remember (but I think it was Halloween). Anyway, this prompts a bunch of them to go to, I think, a graveyard and see if what he said was true.
I think they try an incantation and the nerdy high schooler says he can't believe they did that. Anyway, they awaken either one demon or a group of them. One demon or THE demon, who looks normal enough to dupe one of the students into thinking she's alive to get close enough, ends up biting that same student in the neck.
The movie was probably from the 80s, though maybe the 70s. The only other detail I can think of is that they referred to Halloween as both Halloween and Hallow's Eve.
For some reason, I remember the movie being called the Witching Hour, but the only result I get from IMDB is a foreign movie from 1985, but I remember the movie being American-made, so I don't think this is it. So the title is probably--though not definitely--something like The Witching Hour.
Come to think of it, this movie could have been an episode to a show like Twilight Zone, but I don't think it was.
Anyone want to give this a shot?
I'm trying to remember the name of a movie. It was a typical high school horror. From what I remember, a nerdy high school student does a presentation on... witchcraft, a demon, Halloween, something that I can't remember (but I think it was Halloween). Anyway, this prompts a bunch of them to go to, I think, a graveyard and see if what he said was true.
I think they try an incantation and the nerdy high schooler says he can't believe they did that. Anyway, they awaken either one demon or a group of them. One demon or THE demon, who looks normal enough to dupe one of the students into thinking she's alive to get close enough, ends up biting that same student in the neck.
The movie was probably from the 80s, though maybe the 70s. The only other detail I can think of is that they referred to Halloween as both Halloween and Hallow's Eve.
For some reason, I remember the movie being called the Witching Hour, but the only result I get from IMDB is a foreign movie from 1985, but I remember the movie being American-made, so I don't think this is it. So the title is probably--though not definitely--something like The Witching Hour.
Come to think of it, this movie could have been an episode to a show like Twilight Zone, but I don't think it was.
Anyone want to give this a shot?