| To get even closer to the actual number, every 100 years is not a leap year, but every 400 years is a leap year. |
| For hundreds of years, people used a calendar called the Julian calendar that followed this rule, adding a leap year every four years. |
| To make a calendar a better measure of the Earth's orbit around the Sun, leap year rules were created and have since been modified. |
| There is really no reason for deviating from normal programming approaches for performing leap year calculations. |
| There ought to be twenty-nine days in every month, not just leap year Februaries. |
| Therefore, the year 2000 will be a leap year, but the years 1700, 1800, and 1900 were not. |
