This year is a leap year. Lead Day is Saturday, February 29th, 2020, but... Why??
So, I'll be honest. I was going to try to type out this whole elaborate blog post of me trying to explain the science and math of why we have a Leap Year every four years, but I figured it was best to leave it to the professionals. And seriously, who's more professional at this kind of stuff than the Neil deGrasse Tyson. Check out this video of his explanation below!
"It takes Earth, like, 365 and a quarter days to go around the Sun."