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Concept
February 29
Summary
February 29 is a leap day or "leap year day", an intercalary date added periodically to leap years in the Julian and Gregorian calendars. It is the 60th day of a leap year in both calendars, and 306 days remain until the end of the leap year. It is also the last day of February on leap years with the exception of 1712 in Sweden. It is also the last day of meteorological winter in Northern Hemisphere and the last day of meteorological summer in the Southern Hemisphere on leap years.
In the Gregorian calendar (the standard civil calendar used in most of the world), February 29 is added in each year that is an integer multiple of four (except for years evenly divisible by 100, but not by 400). The Julian calendar —since 1923, a liturgical calendar — has a February 29 every fourth year without exception. (Consequently, February 29 in the Julian calendar falls 13 days later than February 29 in the Gregorian, until the year 2100.)
1504 – Christopher Columbus uses his knowledge of a lunar eclipse that night to convince Jamaican natives to provide him with supplies.
1644 – Abel Tasman's second Pacific voyage begins as he leaves Batavia in command of three ships.
1704 – In Queen Anne's War, French forces and Native Americans stage a raid on Deerfield, Massachusetts Bay Colony, killing 56 villagers and taking more than 100 captive.
1712 – February 29 is followed by February 30 in Sweden, in a move to abolish the Swedish calendar for a return to the Julian calendar.
1720 – Ulrika Eleonora, Queen of Sweden abdicates in favour of her husband, who becomes King Frederick I on March 24.
1768 – Polish nobles form the Bar Confederation.
1796 – The Jay Treaty between the United States and Great Britain comes into force, facilitating ten years of peaceful trade between the two nations.
1892 – St. Petersburg, Florida is incorporated.
1908 – James Madison University is founded at Harrisonburg, Virginia in the United States as The State Normal and Industrial School for Women by the Virginia General Assembly.
Official source
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