Neil deGrasse Tyson has run out of things to correct people about.

Where would we be without esteemed astrophysicist Neil deGrasse Tyson to make sure we all understood that Star Wars is not totally 100 percent scientifically accurate? But with no new movies to fact-check, Tyson is now using his Twitter feed to make sure we understand how a Leap Year works. 

Thank you for this public service, Professor Tyson.