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List of leap years

From Wikipedia, the free encyclopedia

In the Gregorian calendar, the current standard calendar in most of the world, most years that are divisible by 4 are leap years. In a leap year, the month of February has 29 days instead of 28. This compensates for the fact that a solar year is about 6 hours longer than 365 days, by adding an extra day (a leap day) to the calendar every four years.

However, the duration of a solar year is approximately 365.2422 days, slightly less than 365.25 days. The old rule of adding a leap day every fourth year overcompensates. The Gregorian calendar therefore adjusts the leap year rule by omitting three leap days every 400 years, turning three years that would be leap years in the older Julian calendar into common years. This leads to an average calendar year of 365.2425 days, which is very close to the length of the solar year:

(400 years × 365 common days) + (100 − 3) leap days = 146097 days in 400 Gregorian years.

146097 days ÷ 400 years = 365.2425 days per Gregorian year

Each 400-year period has four century years (years divisible by 100), but only one of those is divisible by 400. The century years not divisible by 400 are identified by the Gregorian calendar as the three years in which the usual leap day is omitted.[1][2] For example, 1600 and 2000 were leap years, but 1700, 1800 and 1900 were not. Future century years 2100, 2200, 2300, 2500, 2600, 2700, 2900, and 3000 will not be leap years, but 2400 and 2800 will be.

By this rule, the average number of days per year is 365 + 1/4 - 1/100 + 1/400 = 365.2425.

What follows is a list of all leap years from the year 1600 (AD/CE) to 2108.

1600 1604 1608 1612 1616 1620 1624 1628 1632 1636 1640 1644 1648 1652 1656 1660 1664 1668 1672 1676 1680 1684 1688 1692 1696 1704 1708 1712 1716 1720 1724 1728 1732 1736 1740 1744 1748 1752 1756 1760 1764 1768 1772 1776 1780 1784 1788 1792 1796 1804 1808 1812 1816 1820 1824 1828 1832 1836 1840 1844 1848 1852 1856 1860 1864 1868 1872 1876 1880 1884 1888 1892 1896 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 2104 2108