August 21st, 1740

Born on August 21st, 1740

Age in days, weeks and months
Wow, over 104,000 days old!

Why not celebrate an alternative birthday? In 609 days, exactly on February 13th, 2028, people who were born on August 21st, 1740 will be 105,000 days old!

... in seconds, minutes and hours

What happened on August 21st?

August 21st, 2007

BioShock was released in North America, becoming a critical success and a demonstration of video games as an art form.

August 21st, 2015

Passengers on a Thalys train from Amsterdam to Paris confronted and subdued an attacker who attempted a mass shooting.

August 21st, 2013

Syrian civil war: Areas controlled by the Syrian opposition in Ghouta, Damascus, were attacked by rockets (launcher pictured) containing sarin, killing at least 281 people.

August 21st, 1986

A limnic eruption of Lake Nyos in Cameroon released a cloud of carbon dioxide, suffocating 1,746 people and 3,500 livestock.

August 21st, 1963

South Vietnamese special forces loyal to Ngô Đình Nhu, the brother of President Ngô Đình Diệm, raided and vandalised Buddhist pagodas (one pictured) across the country, arresting thousands and leaving hundreds dead.

August 21st, 1945

American physicist Harry Daghlian accidentally dropped a tungsten carbide brick onto a plutonium bomb core, exposing himself to neutron radiation and later becoming the first Manhattan Project fatality due to a criticality accident.

August 21st, 1944

World War II: A combined Canadian–Polish force captured the town of Falaise, France, in the final offensive of the Battle of Normandy.

August 21st, 1942

World War II: The Imperial Japanese Army lost the Battle of the Tenaru, the first of its three major land offensives during the Guadalcanal campaign.

August 21st, 1911

Leonardo da Vinci's Mona Lisa (pictured) was stolen from the Louvre by museum employee Vincenzo Peruggia and was not recovered until two years later.

August 21st, 1858

The first of seven debates between Abraham Lincoln and Stephen A. Douglas (both pictured), candidates for an Illinois seat in the U.S. Senate, was held in Ottawa, Illinois.

August 21st, 1808

Peninsular War: British and Portuguese forces put an end to the first French invasion of Portugal at the Battle of Vimeiro.

August 21st, 1789

The national colours of Italy first appeared on a tricolour cockade in Genoa.

August 21st, 1717

Austro-Turkish War: Austrian troops under Prince Eugene of Savoy captured the strategically important city of Belgrade from the Ottoman Empire.

August 21st, 1716

Seventh Ottoman–Venetian War: Ottoman forces suddenly abandoned their siege of Corfu, allowing the Republic of Venice to preserve its rule over the Ionian Islands.

August 21st, 1689

Jacobite clans clashed with a regiment of Covenanters in the streets of Dunkeld, Scotland.

Birthdays
... of famous people, actors, celebrities and stars on August 21st

Same year
Born in 1740

74

Marquis de Sade

French nobleman, revolutionary politician, philosopher and writer of erotic works

*June 2nd, 1740, Paris †December 2nd, 1814, Saint-Maurice

73

Louis-Sébastien Mercier

French dramatist and writer (1740-1814)

*June 6th, 1740, Paris †April 25th, 1814, Paris

62

Samuel Arnold

English composer and organist (1740-1802)

*August 10th, 1740, London †October 22nd, 1802, London

23

Ivan VI of Russia

The fifth Emperor of Russia (1740–1741)

*August 12th, 1740, Saint Petersburg †July 5th, 1764, Shlisselburg

74

Margaret Bingham

British painter and writer (1740–1814)

*January 1st, 1740, Devon †February 27th, 1814, St James's Place

54

James Boswell

British lawyer, diarist, and author (1740–1795)

*October 18th, 1740, Edinburgh †May 19th, 1795, London

96

John Latham

English physician, naturalist and author (1740-1837)

*June 27th, 1740, Eltham †February 4th, 1837, Winchester

73

Go-Sakuramachi

Empress regnant of Japan (1740-1813)

*September 23rd, 1740, Kyoto †December 24th, 1813, Kyoto

67

Jeanne Baret

French explorer, naturalist and botanist (1740-1807)

*July 27th, 1740, La Comelle †August 5th, 1807, Brest

55

Carl Michael Bellman

Swedish poet, songwriter and composer (1740–1795)

*February 4th, 1740, Maria Magdalena parish †February 11th, 1795, Klara Church Parish

54

Nicolas Chamfort

French journalist and moralistic author

*April 6th, 1740, Clermont-Ferrand †April 13th, 1794, Paris

74

Matthias Claudius

German poet (1740-1815)

*August 15th, 1740, Reinfeld †January 21st, 1815, Hamburg

58

Horace Bénédict de Saussure

Genevan scientist (1740-1799)

*February 17th, 1740, Conches †January 22nd, 1799, Geneva

99

Heinrich Dietrich von Grolman

German judge (1740-1840)

*December 31st, 1740, Bochum †October 21st, 1840, Berlin

53

Jozafat Bastašić

Roman Catholic bishop

*May 1st, 1740, Croatia †August 28th, 1793, Križevci

58

William Paca

American judge (1740–1799)

*October 31st, 1740, Abingdon-on-Thames †October 23rd, 1799, Queen Anne's County

51

Giovanni Cristofano Amaduzzi

Italian classical philologist (1740-1792)

*August 18th, 1740, Savignano sul Rubicone †January 21st, 1792, Rome

49

Jacques-André Mallet

Genevan astronomer (1740-1790)

*September 23rd, 1740, Geneva †January 31st, 1790, Geneva

77

Jean Baptiste Camille Canclaux

French general (1740-1817)

*August 2nd, 1740, Paris †December 27th, 1817, Paris

81

Pierre Melchior d'Adhémar

French soldier

*July 15th, 1740, Saint-Maurice-de-Cazevieille †September 2nd, 1821, Aimargues

Birthdays of famous people

Public holidays on August 21st

Fixed holidays (Christian Feast Day) which are celebrated on August 21st.

Date as a Roman numeral / digit

Leap year

Yes: 1740 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
August 1740