March 31 is the 90th day of the year (91st in leap years) in the Gregorian calendar. There are 275 days remaining.
- 2007: "Born to Be Wild" and "Best Frenemies" premiered.
- 2012: "Are You Happy Now" and "Planet of the Jellyfish" premiered.
- 2014: SpongeBob You're Fired premiered in Southeast Asia.
- 2015: The SpongeBob Movie: Sponge Out of Water soundtrack was released in physical form.
- March 31 on Wikipedia