1791

1791 (MDCCXCI) was a common year starting on Saturday of the Gregorian calendar and a common year starting on Wednesday of the Julian calendar, the 1791st year of the Common Era (CE) and Anno Domini (AD) designations, the 791st year of the 2nd millennium, the 91st year of the 18th century, and the 2nd year of the 1790s decade. As of the start of 1791, the Gregorian calendar was 11 days ahead of the Julian calendar, which remained in localized use until 1923.

Quick facts

1791 in various calendars
Gregorian calendar	1791 MDCCXCI
Ab urbe condita	2544
Armenian calendar	1240 ԹՎ ՌՄԽ
Assyrian calendar	6541
Balinese saka calendar	1712–1713
Bengali calendar	1197–1198
Berber calendar	2741
British Regnal year	31 Geo. 3 – 32 Geo. 3
Buddhist calendar	2335
Burmese calendar	1153
Byzantine calendar	7299–7300
Chinese calendar	庚戌年 (Metal Dog) 4488 or 4281 — to — 辛亥年 (Metal Pig) 4489 or 4282
Coptic calendar	1507–1508
Discordian calendar	2957
Ethiopian calendar	1783–1784
Hebrew calendar	5551–5552
Hindu calendars
- Vikram Samvat	1847–1848
- Shaka Samvat	1712–1713
- Kali Yuga	4891–4892
Holocene calendar	11791
Igbo calendar	791–792
Iranian calendar	1169–1170
Islamic calendar	1205–1206
Japanese calendar	Kansei 3 (寛政３年)
Javanese calendar	1717–1718
Julian calendar	Gregorian minus 11 days
Korean calendar	4124
Minguo calendar	121 before ROC 民前121年
Nanakshahi calendar	323
Thai solar calendar	2333–2334
Tibetan calendar	ལྕགས་ཕོ་ཁྱི་ལོ་ (male Iron-Dog) 1917 or 1536 or 764 — to — ལྕགས་མོ་ཕག་ལོ་ (female Iron-Boar) 1918 or 1537 or 765

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Events

January–March

January 1 – Austrian composer Joseph Haydn arrives in England, to perform a series of concerts.
January 2 – Northwest Indian War: Big Bottom Massacre – The war begins in the Ohio Country, with this massacre.
January 12 – Holy Roman troops reenter Liège, heralding the end of the Liège Revolution, and the restoration of its Prince-Bishops.
January 25 – The British Parliament passes the Constitutional Act 1791, splitting the old province of Quebec into Upper and Lower Canada.
February 8 – The Bank of the United States, based in Philadelphia, is incorporated by the federal government with a 20-year charter and started with $10,000,000 capital.^[1]
February 21 – The United States opens diplomatic relations with Portugal.
March 2 – French Revolution:
- The abolition of guilds is enacted.
- A mechanical semaphore line for rapid long-distance communication is demonstrated by Claude Chappe in Paris.
March 4 – Vermont is admitted as the 14th U.S. state.
March 13 – Thomas Paine's chief work Rights of Man (first part) is published in London.^[2]
March – French Revolution: In France, the National Constituent Assembly accepts the recommendation of its Commission of Weights and Measures that the nation should adopt the metric system.

April–June

April 21 – The first of forty boundary markers of the original District of Columbia, delineating the borders of the new District in the United States is laid at Jones Point Light in Alexandria, Virginia.
April 29–May 8 – The first American ships reach Japan, brigantine Lady Washington captained by John Kendrick of Boston, and the brig Grace.^[3]^[4]
May 3 – The Sejm of the Polish–Lithuanian Commonwealth proclaims the Constitution of May 3, 1791, the first modern codified constitution in Europe.
June 20 – French Revolution: Flight to Varennes – The French Royal Family is captured when they try to flee in disguise.
June 21 – The Ordnance Survey is founded in Great Britain for the production of maps.^[5]

July–September

July 8 – Austrian composer Joseph Haydn, on his visit to England, is awarded an honorary doctorate of music at the University of Oxford.
July 11 – The ashes of Voltaire are transferred to the Panthéon in Paris.
July 14–17 – Priestley Riots against Dissenters in Birmingham, England.
July 17 – French Revolution: The Champ de Mars massacre occurs in Paris.
August 4 – The Treaty of Sistova is signed, ending the Ottoman–Habsburg wars.
August 6 – The Brandenburg Gate in Berlin (Prussia) is finished.
August 7 – George Hammond is appointed as Great Britain's first minister to the United States.^[1]
August 21 – Haitian Revolution: A slave rebellion breaks out in the French colony of Saint-Domingue.
August 26 – John Fitch is granted a patent for the steamboat in the United States.
August 27
- Declaration of Pillnitz: A proclamation by Frederick William II of Prussia and the Habsburg Leopold II, Holy Roman Emperor, affirms their wish to "put the King of France in a state to strengthen the bases of monarchic government."
- Third Anglo-Mysore War: Battle of Tellicherry – Off the south-west coast of India, a British Royal Navy patrol forces a French convoy bound for Mysore to surrender.
September 5
- An ordinance is written barring the game of baseball within 80 yards of the Meeting House in Pittsfield, Massachusetts, the first known reference to the game of baseball in North America.^[6]
- Declaration of the Rights of Woman and of the Female Citizen is written by activist Olympe de Gouges in response to the Declaration of the Rights of Man and of the Citizen.^[7]
September 6 – Wolfgang Amadeus Mozart's opera seria, La clemenza di Tito, premières at the Estates Theatre in Prague with Mozart conducting to mark the coronation of Leopold II as King of Bohemia.
September 9 – The capital of the United States, Washington, D.C., is named after the incumbent 1st President George Washington.
September 12 – The first serious secondary education school open to girls in Denmark, the Døtreskolen af 1791, is founded in Copenhagen.
September 13 – French Revolution: Louis XVI of France accepts the final version of the completed constitution.
September 14 – French Revolution: The Papal States lose Avignon to Revolutionary France.
September 25 – Mission Santa Cruz is founded by Basque Franciscan Father Fermín Lasuén, becoming the 12th mission in the California mission chain.
September 28 – French Revolution: The law on Jewish emancipation is promulgated in France, the first such legislation in modern Europe.
September 30 – Wolfgang Amadeus Mozart's singspiel opera The Magic Flute (Die Zauberflöte) premières at the Freihaus-Theater auf der Wieden in Vienna with Mozart conducting.

October–December

October 1 – French Revolution: The Legislative Assembly (France) convenes.
October 9 – Mission Nuestra Señora de la Soledad is founded by Father Fermín Lasuén, becoming the 13th mission in the California mission chain.
October 19 – The Treaty of Drottningholm is signed between the Russian Empire and Sweden establishing an alliance between the two.^[8]^[9]
October 28 – French Revolution: The Declaration of the Rights of Woman and of the Female Citizen is published in France.
November 4 – St. Clair's Defeat, the worst loss suffered by the United States Army in fighting against American Indians, takes place in modern-day Mercer County, Ohio. Miami fighters led by Chief Mihsihkinaahkwa (Little Turtle) and by Shawnee warriors commanded by War Chief Weyapiersenwah (Blue Jacket) rout the forces of General Arthur St. Clair and kill 630 U.S. soldiers, along with hundreds of civilians.^[10]
December 4 – The first issue of The Observer, the world's first Sunday newspaper, is published in London.
December 5 – Austrian composer Wolfgang Amadeus Mozart dies early this morning aged 35 at his home in Vienna, having been bedridden since November 20 with a serious illness, perhaps acute rheumatic fever. On a mild and misty December 7, following a funeral service in St. Stephen's Cathedral, he is buried in a common unmarked grave (as customary at this time) in St. Marx Cemetery in the presence of Salieri, Süssmayr, van Swieten (his patron) and two other musicians.^[11]

December 15 – Ratification by the states of the first ten amendments to the United States Constitution is completed, creating the United States Bill of Rights. Two additional amendments remain pending, and one of these is finally ratified in 1992, becoming the Twenty-seventh Amendment.
December 23 – The Pale of Settlement is established by ukase of Catherine the Great, specifying those areas of the Russian Empire in which Jews are permitted permanent residency.

Date unknown

The School for the Indigent Blind, the oldest continuously operating specialist school of its kind in the world, is founded in Liverpool, England, by blind ex-merchant seaman, writer and abolitionist Edward Rushton.
Camembert cheese reputedly first made by Marie Harel, a farmer from Normandy.^[12]
The Dar Hassan Pacha (palace) in the Casbah of Algiers is completed.^[13]
The first printed manuscript of Dream of the Red Chamber by Cao Xueqin, one of the Classic Chinese Novels, begins publication posthumously.