December 31st
- 1931 – Dr. Jekyll and Mr. Hyde went to theaters.
- 1937 – Anthony Hopkins was born.
- 1941 – Sean S. Cunningham was born.
- 1949 – Ellen Datlow was born.
- 1962 – Michael McCarty was born.
- 1963 – Amelia Kinkade was born.
- 1964 – The Curse of the Mummy's Tomb went to theaters (US).
- 1964 – Herman's Rival first aired on television.
- 1965 – Uncle Fester, Tycoon first aired on television.
- 1983 – Lindsey Beth Goddard was born.
- 1988 – Rouse Him Not first aired on television.
- 2014 – Edward Hermann died, age 71.
- 2020 – John Cardos died, age 91.