Do you know why leap years exist?
February 2th means that this year is a Leap Year! So for 2020, there are 366 days in the year. This happens every four years, if you didn't already know.
Sun and moon cycles need to be synced up with the Earth's rotation. Here's some history for you! Julius Ceasar consulted mathematicians and philosophers to establish the extra day every four years.
Years that are divisible by 4 get leap years, so every three out of four turns of the century do not get leap years. So we got one in 2000, but won't have one in 2100, 2200 or 2300.
Crazy right?!
For more info, click here!