This is a
free online Leap Year Calculator which is supereasy to use. You are unsure
whether a given year is a leap year or not? Do you want to know how to
calculate it? You are in the right place to find out.

**Information, facts and tips regarding the Leap
Year Calculator and leap year calculation **

**1. What leap year is? Why do we have it?**

Leap year is a special calendar year which contains an additional day. Leap year is used to keep the calendar year synchronized with the astronomical year. Using the leap ‘technique’ we can keep the Gregorian calendar in alignment with Earth’s revolutions around the Sun.

**2. Why is there a leap year (almost) every 4
years?**

Explained
in more detail the Gregorian calendar has exactly 365 days in a year but the Earth
takes approximately 365.242189 days to circle once around the Sun. So that’s
why we always adding one extra day in the calendar every four years compensates
for the fact that a period of 365 days is shorter than a tropical year by
almost 6 hours.

**3. What is the extra day during a leap year?**

The extra
day during leap years is called a leap day and it’s on February 29. February
was chosen because it’s the shortest month.

**4. How is the Leap Year Calculator works? How to calculate leap years?**

We use the
following formula to calculate a leap year. A year is a leap year if meet the
following requirements:

• The year can be evenly divided by
4.

• It’s not a leap year if can be
evenly divided by 100 unless the year can be exactly divided by 400.

The second rule means that years 1200, 1600, 2000, 2400 and 2800 are leap years, while 1700, 1800, 1900, 2100, 2200, 2300, 2500, 2600 and 2700 not leap years (in spite of each can be divided by 4).

**5. How often are leap years?**

According
to the leap year calculation described above, almost every 4 years is a leap
year.

**6. Which are leap years?**

*Leap years between 1900 and 2100 ((1900 and
2100 are not leap years):*

1904, 1908,
1912, 1916, 1920, 1924, 1928, 1932, 1936, 1940, 1944, 1948, 1952, 1956, 1960,
1964, 1968, 1972, 1976, 1980, 1984, 1988, 1992, 1996, 2000, 2004, 2008, 2012,
2016, 2020, 2024, 2028, 2032, 2036, 2040, 2044, 2048, 2052, 2056, 2060, 2064,
2068, 2072, 2076, 2080, 2084, 2088, 2092, 2096