December 20th
- 1918 – Joseph Payne Brennan was born.
- 1929 – John Cardos was born.
- 1940 – Chamber of Horrors went to theaters.
- 1960 – Man in the Middle first aired on television.
- 1963 – Ninety Years Without Slumbering first aired on television.
- 1964 – Ghidorah, the Three-Headed Monster went to theaters (Japan).
- 1966 – Dark Shadows, Episode 127 first aired on television.
- 1969 – Spooky Space Kook first aired on television.
- 1974 – The Horror in the Heights first aired on television.
- 1996 – Scream went to theaters.