September 18th, 1640

Born on September 18th, 1640

Age in days, weeks and months
Wow, over 140,000 days old!

Why not celebrate an alternative birthday? In 74 days, exactly on October 5th, 2026, people who were born on September 18th, 1640 will be 141,000 days old!

... in seconds, minutes and hours

What happened on September 18th?

September 18th, 1950

Korean War: The Korean People's Army retreated from the Battle of the Pusan Perimeter after six weeks of fighting, marking the farthest that the KPA would advance in the war.

September 18th, 2001

Five letters containing anthrax spores were mailed to various media outlets in the United States.

September 18th, 1961

An aircraft crashed near Ndola in Northern Rhodesia, resulting in the deaths of 16 people, including United Nations secretary-general Dag Hammarskjöld.

September 18th, 1948

The Australian cricket team's Invincibles tour of England concluded; they had played 34 matches, including five Tests, without defeat.

September 18th, 1918

World War I: The Central Powers' defeat at the Battle of Dobro Pole played a role in the Bulgarian withdrawal from the war and led to the subsequent liberation of Vardar Macedonia.

September 18th, 1895

Daniel David Palmer performed the first chiropractic adjustment on janitor William Harvey Lillard.

September 18th, 1879

The Blackpool Illuminations (example pictured) in the English seaside town of Blackpool were switched on for the first time.

September 18th, 1875

The Indianola hurricane dissipated over Mississippi after killing around eight hundred people in Texas.

September 18th, 1873

Panic of 1873: The American bank Jay Cooke & Company declared bankruptcy, setting off a chain reaction of bank failures.

September 18th, 1870

Nathaniel P. Langford of the Washburn–Langford–Doane Expedition first observed a geyser in the Wyoming Territory erupting at regular intervals, naming it Old Faithful (video featured).

September 18th, 1851

The New York Times, the largest metropolitan newspaper in the United States, was founded.

September 18th, 1850

The United States Congress passed the Fugitive Slave Act, decreeing that all escaped slaves be brought back to their masters.

September 18th, 1809

The second Theatre Royal, Covent Garden (interior pictured), opened in London after the original was destroyed by fire.

September 18th, 1048

Byzantine–Seljuk wars: Byzantine forces defeated their Seljuk opponents in the flanks of the nocturnal Battle of Kapetron, but learned of their Georgian allies' defeat in the centre the next morning.

September 18th, 0324

Constantine the Great decisively defeated Licinius in the Battle of Chrysopolis, establishing Constantine's sole control over the Roman Empire and ending the Tetrarchy.

Birthdays
... of famous people, actors, celebrities and stars on September 18th

Same year
Born in 1640

48

Aphra Behn

British playwright, poet and spy (1640–1689)

*July 10th, 1640, Canterbury †April 16th, 1689, London

64

Leopold I, Holy Roman Emperor

Holy Roman Emperor (1658-1705), King of Hungary and Croatia and King of Bohemia

*June 9th, 1640, Vienna †May 5th, 1705, Vienna

66

Madame de Montespan

French noble, mistress of Louis XIV; (1640-1707)

*October 5th, 1640, Lussac-les-Châteaux †May 27th, 1707, Bourbon-l'Archambault

74

Pu Songling

Chinese writer (1640–1715)

*June 5th, 1640, Zichuan District †February 25th, 1715, Zichuan District

62

Gérard Audran

French engraver (1640-1703)

*August 2nd, 1640, Lyon †July 26th, 1703, Paris

55

Peter Müller

(1640-1696)

*July 19th, 1640, Nordhausen †May 31st, 1696, Gera

70

Gerard de Lairesse

Painter and engraver from the Northern Netherlands

*September 11th, 1640, Liège †July 28th, 1711, Amsterdam

68

Barbara Palmer, 1st Duchess of Cleveland

English royal mistress from the Villiers family (1640-1709)

*November 27th, 1640, St Margaret's Church, Westminster †October 9th, 1709, Chiswick

78

Philippe de La Hire

French mathematician and astronomer (1640-1718)

*March 18th, 1640, Paris †April 21st, 1718, Paris

75

Jacques d'Agar

French painter (1640-1715)

*March 9th, 1640, Paris †November 16th, 1715, Copenhagen

85

Pierre II Mignard

French architect (1640-1725)

*February 20th, 1640, Avignon †April 10th, 1725, Avignon

83

Mariana Alcoforado

Portuguese nun and writer

*April 22nd, 1640, Beja †July 28th, 1723, Beja

91

Charles-René d'Hozier

French historian (1640-1732)

*February 24th, 1640, Paris †February 13th, 1732, Paris

82

Claude Fleury

French historian

*December 6th, 1640, Paris †July 14th, 1723, Paris

55

Robert Plot

English scientist

*December 13th, 1640, Sutton Baron And Sutton Baron Hall †April 30th, 1696, Kent

56

Georg Mohr

Danish mathematician

*April 1st, 1640, Copenhagen †January 26th, 1697, Sławnikowice

64

Benjamin Keach

British writer and theologian

*February 29th, 1640, Buckinghamshire †June 18th, 1704

84

Jonathan Singletary Dunham

American settler (1640-1724)

*January 17th, 1640, Newbury †September 6th, 1724

72

Philipp Müller

*August 24th, 1640, Sangerhausen †March 15th, 1713, Jena

Birthdays of famous people

Public holidays on September 18th

Fixed holidays (Christian feast day) which are celebrated on September 18th.

Date as a Roman numeral / digit

Leap year

Yes: 1640 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 1640