Today. February 29th. In History. (LEAP-DAY)

Mr.Reasonable 2012/02/29 08:00:29
Leaping frogLeaping frog

February 29
, known as a leap day in the Gregorian calendar, is a date that occurs in most years that are evenly divisible by 4, such as 2004, 2008, 2012 and 2016. Years that are evenly divisible by 100 do not contain a leap day, with the exception of years that are evenly divisible by 400, which do contain a leap day; thus 1900 did not contain a leap day while 2000 did. Years containing a leap day are called leap years. February 29 is the 60th day of the Gregorian calendar in such a year, with 306 days remaining until the end of that year.

Although most years of the modern calendar have 365 days, a complete revolution around the sun takes approximately 365 days and 6 hours. Every four years, during which an extra 24 hours have accumulated, one extra day is added to keep the count coordinated with the sun's apparent position.

It is, however, slightly inaccurate to calculate an additional 6 hours each year. A better approximation, derived from the Alfonsine tables, is that the Earth makes a complete revolution around the sun in 365 days, 5 hours, 49 minutes, and 16 seconds. To compensate for the difference, an end-of-century year is not a leap year unless it is also exactly divisible by 400. This means that the years 1600 and 2000 were leap years, as will be 2400 and 2800, but the years 1700, 1800 and 1900 were not, nor will 2100, 2200 and 2300.

The Gregorian calendar repeats itself every 400 years, which is exactly 20,871 weeks including 97 leap days. Over this period, February 29 falls on Sunday, Tuesday, and Thursday 13 times each; 14 times each on Friday and Saturday; and 15 times each on Monday and Wednesday.

The concepts of the leap year and leap day are distinct from the leap second, which results from changes in the Earth's rotational speed.
Adding a leap day (after 23 February) shifts the commemorations in the 1962 Roman Missal.

The leap day was introduced as part of the Julian reform. The day following the Terminalia (February 23) was doubled, forming the "bis sextum"—literally 'double sixth', since February 24 was 'the sixth day before the Kalends of March' using Roman inclusive counting (March 1 was the 'first day'). Although exceptions exist, the first day of the bis sextum (February 24) was usually regarded as the intercalated or "bissextile" day since the third century. February 29 came to be regarded as the leap day when the Roman system of numbering days was replaced by sequential numbering in the late Middle Ages.

In the United Kingdom and Hong Kong, a person born on February 29 legally attains the age of 18 on March 1 in the relevant year.

In cases of New Zealand citizens, the NZ Parliament has decreed that if a date of birth was February 29, in non-leap years the legal birth date date shall be the preceding day, February 28. This is affirmed in the Land Transport Act 1999.

In France, there is a humorous periodical called La Bougie du Sapeur (The Sapper's Candle) published every February 29 since 1980. The name is a reference to the sapper Camember, a comic strip character born February 29, 1844 who was created by Georges Colomb in the 1890s.


1504 – Christopher Columbus uses his knowledge of a lunar eclipse that night to convince Native Americans to provide him with supplies.
bullshit award
The "Bullshitter award"

1644 – Abel Tasman's second Pacific voyage began.
1704 – Queen Anne's War: French forces and Native Americans stage a raid on Deerfield, Massachusetts, 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 Old style.
1720 – Queen Ulrika Eleonora of Sweden abdicates in favour of her husband, who becomes King Frederick I.
1768 – Polish nobles formed 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.
The Jay Treaty between the United States and Great Britain

1864 – American Civil War: Kilpatrick-Dahlgren Raid fails – plans to free 15,000 Union soldiers being held near Richmond, Virginia are thwarted.
1892 – St. Petersburg, Florida is incorporated.
1916 – Child labor: In South Carolina, the minimum working age for factory, mill, and mine workers is raised from twelve to fourteen years old.
1920 – Czechoslovak National assembly adopted the Constitution.
1932 – Time magazine features eccentric American politician William "Alfalfa" Murray on its cover after Murray stated his intention to run for President of the United States.
1932 FEB  Time magazine

1936 – Baby Snooks, played by Fanny Brice, debuts on the radio program The Ziegfeld Follies of the Air.
1936 – February 26 Incident in Tokyo ends.
1940 – For her role as Mammy in Gone with the Wind, Hattie McDaniel becomes the first African American to win an Academy Award.
Mammy in Gone with the Wind  Hattie McDaniel Mammy in Gone with the Wind  Hattie McDaniel

1940 – Finland initiates Winter War peace negotiations
1940 – In a ceremony held in Berkeley, California, because of the war, physicist Ernest Lawrence receives the 1939 Nobel Prize in Physics from Sweden's Consul General in San Francisco.
1944 – World War II: The Admiralty Islands are invaded in Operation Brewer led by American General Douglas MacArthur.
1952 – The island of Heligoland is restored to German authority.
1956 – U.S. President Dwight D. Eisenhower announces to the nation that he is running for a second term.
1960 – An earthquake in Morocco kills over 3,000 people and nearly destroys Agadir in the southern part of the country.
1960 – Family Circus makes its debut.
Family Circus makes its debut

1964 – In Sydney, Australian swimmer Dawn Fraser sets a new world record in the 100-meter freestyle swimming competition (58.9 seconds).
1972 – Vietnam War: Vietnamization – South Korea withdraws 11,000 of its 48,000 troops from Vietnam.
1972 – Hank Aaron becomes the first player in the history of Major League Baseball to sign a $200,000 contract.
1972  u2013 Hank Aaron

1980 – Gordie Howe of the then Hartford Whalers makes NHL history as he scores his 800th goal.
1984 – Canadian Prime Minister Pierre Trudeau announces he will retire as soon as the Liberals can elect another leader.
1988 – South African archbishop Desmond Tutu is arrested along with 100 clergymen during a five-day anti-apartheid demonstration in Cape Town
1988 – Svend Robinson becomes the first member of the Canadian House of Commons to come out as gay.
1992 – First day of Bosnia and Herzegovina independence referendum.
1996 – Faucett Flight 251 crashes in the Andes, killing 123 people.
2004 – Jean-Bertrand Aristide is removed as President of Haiti following a coup.


A person who is born on February 29 may be called a "leapling" or a
"leap year baby". In non-leap years, some leaplings celebrate their birthday on either February 28 or March 1, while others only observe birthdays on the authentic intercalary dates.

For legal purposes, their legal birthdays depend on how different laws count time intervals. In England and Wales, the legal birthday of a leapling is March 1 in common years. The same applies in Hong Kong as well (see Leap Years, above). In Taiwan (Republic of China)
and in New Zealand, the legal birthday of a leapling is February 28 in
common years. So in England and Wales or in Hong Kong, a person born on
February 29, 1996 will have legally reached 18 years old on March 1,
2014; in Taiwan and in New Zealand he or she legally becomes 18 on
February 28, 2014.

"If a period fixed by weeks, months, and years does not commence
from the beginning of a week, month, or year, it ends with the ending of
the day which proceeds the day of the last week, month, or year which
corresponds to that on which it began to commence. But if there is no
corresponding day in the last month, the period ends with the ending of
the last day of the last month"

There are many instances in children's literature where a person's
claim to be only a quarter of their actual age turns out to be based on
counting their leap-year birthdays. A similar device is used in the plot
of Gilbert and Sullivan's 1879 comic opera The Pirates of Penzance: As a child, Frederic was apprenticed to a band of pirates
until the age of 21. Now, having passed his 21st year, he leaves the
pirate band and falls in love. However, it turns out that the pirate indenture says that his apprenticeship does not end until his 21st birthday,
and since he was born on February 29, that day will not arrive until he
is in his eighties. As such, he must leave his fiancée and return to
the pirates. It may be worked out from the opera's dialogue
that Frederic's birthday is February 29, 1852 thus making the opera set
in 1873. (This assumes that Frederic is aware that 1900 will not be a
leap year. If not, the dates would be later by four years.)

In the manga and anime series Ouran High School Host Club, the character Mitsukuni Haninozuka,
also known as "Honey" or "Hunny", was born on February 29. He is
depicted as being small and cute, and one of the reasons given why he is
so small being that he was born on February 29, the idea being that,
"Because his birthday comes once every four years, he grows once every
four years", according to creator Bisco Hatori

The only notable person known to have both been born and died on February 29 was Sir James Wilson (1812–1880), Premier of Tasmania.

Other notable persons born on February 29:


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