December 15th, 1256

Born on December 15th, 1256

Age in days, weeks and months
Wow, over 281,000 days old!

Why not celebrate an alternative birthday? In 906 days, exactly on January 17th, 2029, people who were born on December 15th, 1256 will be 282,000 days old!

... in seconds, minutes and hours

What happened on December 15th, 1256?

December 15th, 1256

Mongol forces under Hulagu enter and dismantle the Nizari Ismaili (Assassin) stronghold at Alamut Castle (in present-day Iran) as part of their offensive on Islamic southwest Asia.

en.wikipedia.org/wiki/Mongols

What else happened on December 15th?

December 15th, 2013

The South Sudanese Civil War began when three opposition leaders voted to boycott the meeting of the National Liberation Council in Juba.

December 15th, 2005

The F-22 Raptor, an early successful stealth fighter, entered into service despite a protracted and costly development period.

December 15th, 1970

The Soviet spacecraft Venera 7 touched down on the surface of Venus, making the first successful landing of a spacecraft on another planet.

December 15th, 1961

Former Nazi leader Adolf Eichmann was sentenced to death after being found guilty on fifteen criminal charges, including war crimes and crimes against humanity.

December 15th, 1946

U.S.-backed Iranian troops brought an end to the Iran crisis when they marched on the breakaway Republic of Mahabad and recaptured the territory.

December 15th, 1945

The US-led occupying forces ordered the government of Japan to cease state support for Shinto.

December 15th, 1943

World War II: Australian and American forces (pictured) began the Battle of Arawe against Japanese forces on New Britain as a diversion before a larger landing at Cape Gloucester.

December 15th, 1939

The American historical epic film Gone With the Wind, adapted from Margaret Mitchell's Pulitzer Prize–winning novel of the same name, premiered in Atlanta, Georgia.

December 15th, 1906

The Great Northern, Piccadilly and Brompton Railway, a 14.17-kilometre (8.80 mi) long deep-level underground tube railway connecting Hammersmith and Finsbury Park, London, opened.

December 15th, 1890

Sitting Bull, a Hunkpapa Lakota leader, was killed on Standing Rock Sioux Reservation in South Dakota by U.S. Indian agency police.

December 15th, 1882

Maolra Seoighe was wrongly convicted and hanged for the Maamtrasna murders following a trial in a language he could not understand.

December 15th, 1871

Sixteen-year-old Ella Stewart sent the first telegraphed message from Arizona Territory.

December 15th, 1864

American Civil War: Union troops defeated the Army of Tennessee, one of the largest Confederate forces, at the Battle of Nashville.

December 15th, 1791

The first ten amendments to the United States Constitution, collectively known as the Bill of Rights, were ratified.

Public holidays on December 15th

Fixed holidays (Bill of Rights Day , Christian feast day) which are celebrated on December 15th.

Date as a Roman numeral / digit

Leap year

Yes: 1256 is a leap year, therefore has a 29th of February with an additional leap day and a total of 366 days (instead of the usual 365 days in a normal year).

Calendar
December 1256