Every 4 Years there is a Leap Year Usually it’s an Even Year that is Divisible by the Number 4 Evenly…. E.g. below:

2012 Take the 12/(4 Years)= 3

2016 Take the 16/(4 Years)=4

2020 Take the 20/(4 Years)=5

2024 Take the 24/(4 Years)=6

You may also note on a Calendar that instead of 28 Days there is 29 Days Instead.