September 13th, 1221

Born on September 13th, 1221

Age in days, weeks and months
Wow, over 293,000 days old!

Why not celebrate an alternative birthday? In 62 days, exactly on August 24th, 2026, people who were born on September 13th, 1221 will be 294,000 days old!

... in seconds, minutes and hours

What happened on September 13th?

September 13th, 2005

A software bug caused a simulated pandemic in the online video game World of Warcraft, serving as a model for epidemiologists to understand how human interaction influences disease outbreaks.

September 13th, 1993

Nirvana released their third and final studio album, In Utero, which went on to sell more than 15 million copies.

September 13th, 1988

Hurricane Gilbert reached a minimum pressure of 888 mb (26.22 inHg) with sustained flight-level winds of 185 mph (295 km/h), making it the most intense Atlantic hurricane on record at the time.

September 13th, 1985

Super Mario Bros., one of the most influential and best-selling video games in history, was first released in Japan for the Nintendo Entertainment System.

September 13th, 1964

South Vietnamese generals Lâm Văn Phát and Dương Văn Đức staged a coup attempt after being demoted by junta leader Nguyễn Khánh.

September 13th, 1959

The Soviet spacecraft Luna 2 (model pictured) struck the Moon, the first spacecraft to reach another celestial body.

September 13th, 1919

The Boston police strike ended after four days of rule by the state militia, the deaths of nine people, and accusations that striking officers were "agents of Lenin".

September 13th, 1914

World War I: The French army repulsed a German assault against their positions on high ground near the city of Nancy.

September 13th, 1848

An explosion drove an iron rod through the head of railroad foreman Phineas Gage; his survival and recovery influenced 19th-century discussion of psychology and neuroscience.

September 13th, 1814

War of 1812: Fort McHenry in Baltimore's Inner Harbor was attacked by British forces during the Battle of Baltimore, inspiring Francis Scott Key to write "Defence of Fort McHenry", later used as the lyrics to the United States national anthem.

September 13th, 1759

French and Indian War: British forces won the Battle of the Plains of Abraham near Quebec City, despite General James Wolfe being mortally wounded.

September 13th, 1567

The siege of Inabayama Castle, the final battle in Oda Nobunaga's campaign to conquer Mino Province, began; it culminated in a decisive victory for Nobunaga.

September 13th, 1541

After three years of exile, French theologian John Calvin (pictured) returned to Geneva to reform the church under a system of Christian theology later known as Calvinism.

January 1st, 1970

According to Roman tradition, the Temple of Jupiter Optimus Maximus (depicted), the most important temple in ancient Rome, was dedicated.

September 13th, 1971

Following a failed coup attempt, Mao Zedong's second-in-command Lin Biao died in a plane crash while attempting to flee China.

Public holidays on September 13th

Fixed holidays (Christian feast day) which are celebrated on September 13th.

Date as a Roman numeral / digit

Leap year

No: With 365 days 1221 is a normal year and no leap year.

Calendar
September 1221