A leap year is a year that has an extra day added to it, specifically February 29th. This extra day is added to synchronize the calendar year with the astronomical or solar year, which is the length of time it takes for the Earth to orbit around the Sun.

The reason for this synchronization is to keep the calendar in alignment with the seasons. The Earth’s orbit around the Sun is not exactly 365 days long, but rather it is about 365.24 days long. If we didn’t have leap years, the calendar would gradually get out of sync with the seasons, with each passing year being a little bit off.

To fix this, we add an extra day to the calendar every four years, which helps to keep the calendar in sync with the seasons. This extra day is added to February, so that every four years, February has 29 days instead of the usual 28. This is why February 29th is called a “leap day.”

Leap years are determined by a set of rules that have been in place for centuries. According to these rules, any year that is evenly divisible by 4 is a leap year, with the exception of years that are divisible by 100 but not by 400. For example, 1600 and 2000 were leap years, but 1700, 1800, and 1900 were not.

## When is the next leap year?

The next leap year is 2024. Leap years occur every four years, with the exception of years that are divisible by 100 but not by 400. For example, 1900 was not a leap year, but 2000 was.

To determine whether a year is a leap year, you can use the following rules:

- If the year is evenly divisible by 4, it is a leap year.
- If the year is evenly divisible by 100, it is not a leap year, unless it is also evenly divisible by 400.

For example, to determine whether 2028 is a leap year:

- 2028 is evenly divisible by 4, so it is a leap year.

You can use these rules to determine whether any year is a leap year. Just remember that leap years occur every four years, with the exception of years that are divisible by 100 but not by 400.