When Is Leap Year Going to Happen Again
This video shows why we accept spring years. And information technology shows what happens if we don't. Via James O'Donoghue.
Why 2022 isn't a bound year
The last bound yr was 2020. Then 2024 volition be our adjacent leap yr, a 366-solar day-long year, with an actress day added to our calendar (February 29). We'll phone call that extra day a leap day. It'll help synchronize our human-created calendars with Earth's orbit around the lord's day, and with the passing of the seasons. Why exercise we need the extra twenty-four hour period? Blame World's orbit. Our planet takes approximately 365.25 days to orbit the sunday in one case. It's that .25 that creates the demand for a bound year every 4 years.
During non-jump years, aka common years – similar 2022 – the agenda doesn't have into business relationship the actress quarter of a 24-hour interval required by Globe to complete a single orbit. In essence, the calendar year, which is a man artifact, is faster than the solar twelvemonth, the 365 days 5 hours 48 minutes 46 seconds that our planet requires to orbit the sunday once.
Over fourth dimension and without correction, the agenda yr would drift abroad from the solar yr. And the drift would add together up speedily. For case, without correction the calendar twelvemonth would exist off by about one day after four years. It'd be off by about 25 days later 100 years. Yous can see that, if even more time were to pass without the leap twelvemonth every bit a agenda correction, eventually February would exist a summer month in the Northern Hemisphere.
Leap years and the Gregorian agenda
Leap days were get-go added to the Julian Calendar in 46 BCE by Julius Caesar at the communication of Sosigenes, an Alexandrian astronomer.
In 1582, Pope Gregory XIII revised the Julian agenda by creating the Gregorian calendar with the assistance of Christopher Clavius, a High german mathematician and astronomer. The Gregorian calendar further stated that leap days should not exist added in years ending in "00" unless that year is also divisible past 400. This additional correction was added to stabilize the calendar over a period of thousands of years and was necessary because solar years are actually slightly less than 365.25 days. In fact, a solar yr occurs over a period of 365.2422 days.
So, according to the rules fix forth in the Gregorian calendar, leap years have occurred or will occur during the post-obit years:
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 2112 2116 2120 2124 2128 2132 2136 2140 2144 2148 2152.
Notice that 2000 was a leap twelvemonth because it is divisible by 400, but that 1900 was not a leap yr.
Since 1582, the Gregorian calendar has been gradually adopted as a "civil" international standard for many countries around the world.
Leap year lore
In medieval Republic of ireland and Scotland, women were immune to propose marriage to men on February 29 of any leap year. A man who rejected the proposal owed a fine to the woman.
Children built-in on Jump Twenty-four hours accept a truthful birthday every four years. They more often than not volition celebrate their birth on Feb 28 or March 1.
Some cultures consider a leap year unlucky – for people or animals – all year long.
Bottom line: 2022 isn't a leap year. But 2024 will be. Why we have jump years.
garfieldbuttephon.blogspot.com
Source: https://earthsky.org/human-world/why-do-we-need-leap-years/
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