There a few simple steps to follow in order to calculate if a year will be a leap year:

- Is the year evenly divisible by 4?
- If no, then it is
**NOT**a leap year. - If yes, proceed to step 2.

- If no, then it is
- Is the year evenly divisible by 100?
- If no, then it
**IS**a leap year. - If yes, then proceed to step 3.

- If no, then it
- Is the year evenly divisible by 400?
- If no, then it is
**NOT**a leap year. - If yes, then it
**IS**a leap year.

- If no, then it is

Let’s practice with the year 1900 to see if it is a leap year by following the steps:

- Is 1900 evenly divisible by 4?
- 1900/4 = 475 –> YES, proceed to step 2.

- Is 1900 evenly divisible by 100?
- 1900/100 = 19 –> YES, then proceed to step 3.

- Is 1900 evenly divisible by 400?
- 1900/400 = 4.75 –> NO, then it is
**NOT**a leap year.

- 1900/400 = 4.75 –> NO, then it is

Quick Hint: Every non-century year that is evenly divisible by 4 is ALWAYS a leap year! That is why the year 2016, a non-century year that is evenly divisible by 4, is a leap year. We can check this by following the same steps:

- Is 2016 evenly divisible by 4?
- 2016/4 = 504 –> YES

- Is 2016 evenly divisible by 100?
- 2016/100 = 2.16 –> NO, so it
**IS**a leap year!

- 2016/100 = 2.16 –> NO, so it

Below is a helpful flow chart:

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