December 18 is the 352nd day of the year (353rd in leap years) in the Gregorian calendar. There are 13 days remaining.
- 1954: Ray Liotta, the voice of the Leader of The Bubble Poppin' Boys, was born.
- 2002: Revenge of the Flying Dutchman is released for Gamecube in the USA.
- 2014: A second TV spot advertisement for The SpongeBob Movie: Sponge Out of Water was released.
- December 18 on Wikipedia