June 21 is the 172nd day of the year (173rd in leap years) in the Gregorian calendar. There are 193 days remaining.
- The first day of summer in "Krabby Land."
- 2013: "License to Milkshake" and "Squid Baby" premiered in Greece.
- 2017: The SpongeBob Comics Annual-Size Super-Giant Swimtacular #5 was released.
- June 21 on Wikipedia