September 25th, 1440

Born on September 25th, 1440

Age in days, weeks and months
Wow, over 213,000 days old!

Why not celebrate an alternative birthday? In 30 days, exactly on August 24th, 2026, people who were born on September 25th, 1440 will be 214,000 days old!

... in seconds, minutes and hours

What happened on September 25th?

September 25th, 1982

Keke Rosberg (pictured) won his only Formula One championship with a fifth-place finish at the Caesars Palace Grand Prix.

September 25th, 1959

S. W. R. D. Bandaranaike, Prime Minister of Ceylon, was shot by a Buddhist monk, dying the following day.

September 25th, 2005

Typhoon Longwang, the deadliest tropical cyclone to hit China in that year, formed just north of the Mariana Islands.

September 25th, 1990

The Ram Rath Yatra, a political–religious rally organised to erect a temple to the Hindu deity Rama on the site of the Babri Masjid in Ayodhya, began in the Indian state of Gujarat.

September 25th, 1981

Sandra Day O'Connor (pictured) became the first female justice of the Supreme Court of the United States.

September 25th, 1977

About 4,200 people took part in the first modern Chicago Marathon.

September 25th, 1962

The North Yemen Civil War began when Abdullah al-Sallal dethroned the newly crowned Imam al-Badr and declared Yemen to be a republic under his presidency.

September 25th, 1957

United States Army troops escorted nine students as Central High School in Little Rock, Arkansas was integrated.

September 25th, 1944

Second World War: British troops began their withdrawal from the Battle of Arnhem in the Netherlands, ending the Allies' Operation Market Garden in defeat.

September 25th, 1890

Sequoia National Park (pictured) was established to conserve giant sequoia trees in an area affected by logging in the southern Sierra Nevada in California.

September 25th, 1800

French Revolutionary Wars: After U.S. ships became involved, French forces abandoned their invasion of the Batavian island of Curaçao.

September 25th, 1790

Peking opera was born with the introduction of Hui opera to Beijing by the "Four Great Anhui Troupes" in honour of the Qianlong Emperor's 80th birthday.

September 25th, 1775

American Revolutionary War: Ethan Allen and a small force of American and Quebec militia failed to capture the city of Montreal from British forces.

September 25th, 1396

Ottoman wars in Europe: Ottoman forces under Bayezid I defeated a Christian alliance led by Sigismund of Hungary near present-day Nikopol, Bulgaria.

September 25th, 1237

Henry III of England and Alexander II of Scotland signed the Treaty of York, establishing the Anglo-Scottish border, which mostly remains the same today.

Public holidays on September 25th

Fixed holidays (Christian feast day) which are celebrated on September 25th.

Date as a Roman numeral / digit

Leap year

Yes: 1440 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 1440