September 10th, 1256

Born on September 10th, 1256

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

Why not celebrate an alternative birthday? In 842 days, exactly on October 13th, 2028, people who were born on September 10th, 1256 will be 282,000 days old!

... in seconds, minutes and hours

What happened on September 10th?

September 10th, 2025

American political activist Charlie Kirk was shot and killed at an event at Utah Valley University.

September 10th, 1858

George Mary Searle discovered the asteroid 55 Pandora (pictured) from the Dudley Observatory near Albany, New York; it was his only asteroid discovery.

September 10th, 1622

Fifty-five Christians were executed in Nagasaki during the Great Genna Martyrdom, part of persecution towards Christians in Japan by the Tokugawa shogunate.

September 10th, 1845

John Doubleday completed a "masterly" restoration of the Portland Vase (pictured), which had been smashed into hundreds of pieces seven months prior.

September 10th, 2008

CERN's Large Hadron Collider (section pictured), the world's largest and highest-energy particle accelerator, first began operations beneath the France–Switzerland border.

September 10th, 1724

Johann Sebastian Bach led the first performance of Jesu, der du meine Seele, BWV 78, a chorale cantata based on a passion hymn by Johann Rist.

September 10th, 2000

British forces freed soldiers and civilians who had been held captive by the militant group the West Side Boys, contributing to the end of the Sierra Leone Civil War.

September 10th, 1990

Pope John Paul II consecrated the Basilica of Our Lady of Peace, one of the largest churches in the world, in Yamoussoukro, Ivory Coast.

September 10th, 1983

Typhoon Ellen dissipated after destroying hundreds of homes across Hong Kong and the Philippines.

September 10th, 1974

After centuries of Portuguese rule, the country of Guinea-Bissau was formally recognized as independent.

September 10th, 1961

At the Italian Grand Prix at Monza, German driver Wolfgang von Trips's car collided with another, causing it to become airborne and crash into a side barrier, killing him and 15 spectators.

September 10th, 1960

Running barefoot in the marathon event at the Rome Olympics, Abebe Bikila became the first athlete from sub-Saharan Africa to win an Olympic gold medal.

September 10th, 1946

While riding a train to Darjeeling, India, Sister Teresa Bojaxhiu, later Mother Teresa (pictured), experienced what she later described as the "call within the call", directing her to "leave the convent and help the poor while living among them".

September 10th, 1945

Mike the Headless Chicken was decapitated on a farm in Colorado; he survived another 18 months as part of sideshows before choking to death.

September 10th, 1937

Led by the United Kingdom and France, nine nations met at the Nyon Conference to address international piracy in the Mediterranean Sea.

Public holidays on September 10th

Fixed holidays (Christian feast day) which are celebrated on September 10th.

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
September 1256