September 11th, 1276

Born on September 11th, 1276

Age in days, weeks and months
Wow, over 273,000 days old!

Why not celebrate an alternative birthday? In 117 days, exactly on November 19th, 2026, people who were born on September 11th, 1276 will be 274,000 days old!

... in seconds, minutes and hours

What happened on September 11th?

September 11th, 1941

In Des Moines, Iowa, American aviator Charles Lindbergh delivered an antisemitic speech (reporting pictured) accusing Jews of controlling the media and manipulating the United States into joining World War II.

September 11th, 2025

Former Brazilian president Jair Bolsonaro was sentenced to 27 years in prison for his involvement in a coup plot.

September 11th, 1789

Alexander Hamilton (pictured), co-writer of The Federalist Papers, became the first U.S. Secretary of the Treasury.

September 11th, 2012

The American consulate and CIA annex in Libya were attacked by a heavily armed group, resulting in the deaths of U.S. ambassador J. Christopher Stevens and three others.

September 11th, 2001

al-Qaeda hijacked four passenger airliners to carry out a series of terrorist attacks (one pictured) against targets in New York City and the area of Washington, D.C., killing 2,977 people.

September 11th, 1995

Mir EO-19, the first expedition to the Russian space station Mir launched on an American Space Shuttle, returned to Earth after approximately 75 days in space.

September 11th, 1992

Hurricane Iniki, the most powerful hurricane on record to strike the Hawaiian Islands, passed directly over the island of Kauai, killing six people and causing around US$1.8 billion dollars in damage.

September 11th, 1981

Iranian politician Ayatollah Madani and three others were assassinated by an agent of the MEK who detonated a grenade during Friday prayers in Tabriz.

September 11th, 1978

British medical photographer Janet Parker became the last recorded person to die from smallpox, leading to a debate on whether the virus should be preserved.

September 11th, 1945

The Japanese-run camp at Batu Lintang in Borneo was liberated by the Australian 9th Division, averting the planned massacre of its 2,000-plus Allied POWs and civilian internees by four days.

September 11th, 1914

First World War: The Australian Naval and Military Expeditionary Force invaded German New Guinea, winning the Battle of Bita Paka.

September 11th, 1897

Gaki Sherocho was captured by the forces of Ethiopian emperor Menelik II, bringing an end to the Kingdom of Kaffa.

September 11th, 1893

Swami Vivekananda (pictured) gave a speech introducing Hinduism on the opening day of the first Parliament of the World's Religions in Chicago.

September 11th, 1857

A legion of Mormon militiamen completed a massacre of at least 120 California-bound Arkansas pioneers at Mountain Meadow, Utah.

September 11th, 1851

In a fight near Christiana, Pennsylvania, a group of escaped slaves and free Blacks led by William Parker fought off a federal posse seeking to arrest and return the escapees to slavery.

Public holidays on September 11th

Fixed holidays (Christian feast days, September 11 attacks-related observances) which are celebrated on September 11th.

Date as a Roman numeral / digit

Leap year

Yes: 1276 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 1276