2020 - Leap Year

• A normal year has 365 days.
• A Leap Year has 366 days (the extra day is the 29th of February).

How to know if it is a Leap Year:
Leap Years are any year that can be exactly divided by 4 (such as 2016, 2020, 2024, etc)
except if it can be exactly divided by 100, then it isn't (such as 2100, 2200, etc)
except if it can be exactly divided by 400, then it is (such as 2000, 2400)

Why do we have Leap Year?
Because the Earth rotates about 365.242375 times a year ...
... but a normal year is 365 days, ...
... so something has to be done to "catch up" the extra 0.242375 days a year.

Enjoy your "extra day" this year!