1. Leap Year Calculator

Was 1673 a leap year?

To check if any year is a leap year, please type a year number in the form below then click on the button 'Is Leap a Year?'.

Leap Year Calculator

Please fill in a year number
(Examples: 2000, 2019, 1492, ...):

Results:

 

What is Leap Year and How Many Days Do you Have in a Leap Year?

A leap year has a total of 366 days instead of the usual 365 as a result of adding an extra day (February 29) to the Gregorian Calendar which is the calendar currently used by most modern societies. This calendar was introduced in 1582, to replace the flawed Julian Calendar.

How to Know if Certain Year is a Leap Year

The 3 conditions for a given year be a leap year are:

  1. The year is exactly divisible by four (with no remainder);
  2. If the year is divisible by 100 (years ending in two zeros), it is not a leap, except if
  3. It is also divisible by 400 (in this case it will be a leap year).

Examples:

Was 2000 a leap year?

  • 2000 is divisible 4 (2000/4 = 500). Therefore, it could be a leap year.
  • 2000 is divisible by 100 (2000/100 = 20), So, it could not have been a leap year, but
  • 2000 is divisible 400 ( 2000/400 = 5). So, we conclude that 2000 was a leap year.

Will 2020 be a leap year?

  • 2020 is divisible 4 (= 505). So it could be a leap year
  • 2020 is not divisible by 100 (= 20.2), so it will be a leap year. (It is not necessary to check the third condition)

Will 2018 be leap year?

  • 2018 is not divisible 4 (= 504.5), so it will not be a leap year (it is not necessary to check the next two conditions).

The year being divisible by 4 is a necessary condition, but not sufficient for a year to be leap, but for this century, we may consider sufficient until the year 2098. For this century, it is not necessary to check the other conditions. So, we can confidently say that: "until 2096, if we want to know if a given year is leap or not, we just need to check if that year is or is not divisible by 4. So, any year divisible by four is a leap year! (for this century).

The leap year system makes the calendar coincide with the cycle of the seasons.

When's the next leap year?

The next leap years until 2098 will be:

2020, 2024, 2028, 2032, 2036, 2040, 2044, 2048, 2052, 2056, 2060, 2064, 2068, 2072, 2076, 2080, 2084, 2088, 2092 and 2096

Leap year List from 1600 to 2100

Year Year Year Year Year
1600 1696 1796 1896 1996
1604 1704 1804 1904 2000
1608 1708 1808 1908 2004
1612 1712 1812 1912 2008
1616 1716 1816 1916 2012
1620 1720 1820 1920 2016
1624 1724 1824 1924 2020
1628 1728 1828 1928 2024
1632 1732 1832 1932 2028
1636 1736 1836 1936 2032
1640 1740 1840 1940 2036
1644 1744 1844 1944 2040
1648 1748 1848 1948 2044
1652 1752 1852 1952 2048
1656 1756 1856 1956 2052
1660 1760 1860 1960 2056
1664 1764 1864 1964 2060
1668 1768 1868 1968 2064
1672 1772 1872 1972 2068
1676 1776 1876 1976 2072
1680 1780 1880 1980 2076
1684 1784 1884 1984 2080
1688 1788 1888 1988 2084
1692 1792 1892 1992 2088
- - - - 2092
- - - - 2096

Note: 2100 will not be a leap year.


Click on any year below to check if it is a leap year:

  1. 1663 leap year?
  2. 1664 leap year?
  3. 1665 leap year?
  4. 1666 leap year?
  5. 1667 leap year?
  6. 1668 leap year?
  7. 1669 leap year?
  8. 1670 leap year?
  9. 1671 leap year?
  10. 1672 leap year?
  11. 1673 leap year?
  12. 1674 leap year?
  13. 1675 leap year?
  14. 1676 leap year?
  15. 1677 leap year?
  16. 1678 leap year?
  17. 1679 leap year?
  18. 1680 leap year?
  19. 1681 leap year?
  20. 1682 leap year?
  21. 1683 leap year?