1786

Millennium:	2nd millennium
Centuries:	17th century · 18th century · 19th century
Decades:	1750s · 1760s · 1770s · 1780s · 1790s · 1800s · 1810s
Years:	1783 · 1784 · 1785 · 1786 · 1787 · 1788 · 1789

1786 by topic:
Arts and Sciences
Archaeology – Architecture – Art – Literature (Poetry) – Music – Science
Countries
Canada –Denmark – France – Great Britain – Ireland – Norway – Russia – Scotland –Sweden – United States
Lists of leaders
Colonial governors – State leaders
Birth and death categories
Births – Deaths
Establishments and disestablishments categories
Establishments – Disestablishments
Works category
Works

1786 in various calendars
Gregorian calendar	1786 MDCCLXXXVI
Ab urbe condita	2539
Armenian calendar	1235 ԹՎ ՌՄԼԵ
Assyrian calendar	6536
Bengali calendar	1193
Berber calendar	2736
British Regnal year	26 Geo. 3 – 27 Geo. 3
Buddhist calendar	2330
Burmese calendar	1148
Byzantine calendar	7294–7295
Chinese calendar	乙巳年 (Wood Snake) 4482 or 4422 — to — 丙午年 (Fire Horse) 4483 or 4423
Coptic calendar	1502–1503
Discordian calendar	2952
Ethiopian calendar	1778–1779
Hebrew calendar	5546–5547
Hindu calendars
- Vikram Samvat	1842–1843
- Shaka Samvat	1707–1708
- Kali Yuga	4886–4887
Holocene calendar	11786
Igbo calendar	786–787
Iranian calendar	1164–1165
Islamic calendar	1200–1201
Japanese calendar	Tenmei 6 (天明６年)
Javanese calendar	1712–1713
Julian calendar	Gregorian minus 11 days
Korean calendar	4119
Minguo calendar	126 before ROC 民前126年
Nanakshahi calendar	318
Thai solar calendar	2328–2329

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1786 (MDCCLXXXVI) was a common year starting on Sunday (dominical letter A) of the Gregorian calendar and a common year starting on Thursday (dominical letter D) of the Julian calendar, the 1786th year of the Common Era (CE) and Anno Domini (AD) designations, the 786th year of the 2nd millennium, the 86th year of the 18th century, and the 7th year of the 1780s decade. As of the start of 1786, the Gregorian calendar was 11 days ahead of the Julian calendar, which remained in localized use until 1918.

Events

January–June

January 3 – The third Treaty of Hopewell was signed between the United States of America and the Choctaw.
January 6 – The outward bound East Indiaman Halsewell was wrecked on the south coast of England in a storm with only 74 of more than 240 on board surviving.^[1]
February 2 – In a speech before The Asiatic Society in Calcutta, Sir William Jones noted the formal resemblances between Latin, Greek, and Sanskrit, laying the foundation for comparative linguistics and Indo-European studies.
May 1 – Mozart's opera The Marriage of Figaro premiered in Vienna.
May 21 – The trial in the Affair of the Diamond Necklace ended in Paris.
June 10 – An earthquake-caused landslide dam on the Dadu River gave way, killing 100,000 in the Sichuan province of China.
June 25 – Gavriil Pribylov discovered St. George Island of the Pribilof Islands in the Bering Sea.

July–December

July 14 – Convention of London between the Kingdom of Great Britain and the Kingdom of Spain: British settlements on the Mosquito Coast of Central America were to be evacuated; Spain expanded the territory available to the British in Belize on the Yucatán Peninsula for cutting mahogany.
July 31 – "Kilmarnock volume" of Robert Burns' Poems, Chiefly in the Scottish Dialect published in Scotland.
August
- James Rumsey tested his first steamboat on the Potomac River at Shepherdstown, Virginia.
- The Cabinet of Great Britain approved the establishment of a penal colony at Botany Bay in Australia.
August 1 – Caroline Herschel discovered a comet (the first discovered by a woman).
August 8 – Mont Blanc was climbed for the first time by Dr. Michel-Gabriel Paccard and Jacques Balmat.

August 8: Mont Blanc climbed.

August 11 – Captain Francis Light acquired the island of Penang from the Sultan of Kedah on behalf of the British East India Company, renaming it Prince of Wales Island in honour of the heir to the British throne,^[2] the first colony of the British Empire in Southeast Asia.
August 17 : The paternal nephew of Frederick the Great, Frederick William, became King of Prussia, as Frederick William II.
August 18 : The Kingdom of Denmark–Norway chartered six settlements in Iceland to trade with it, thus ending the Danish–Icelandic Trade Monopoly and founding Reykjavík.
August 29 – Shays' Rebellion began in Massachusetts.
September–December – Goethe undertook his Italian Journey (published in 1817).
September 2 – A hurricane struck Barbados.
September 11–14 – Annapolis Convention was held, resulting in scheduling of the Philadelphia Convention.
September 26 – Eden Agreement: Commercial treaty was signed between the Kingdoms of Great Britain and France.^[3]
November 7 – The oldest musical organization in the United States, the Stoughton Musical Society, was founded.
November 30 – Peter Leopold Joseph of Habsburg-Lorraine, Grand Duke of Tuscany, promulgated a penal reform making his country the first state to abolish the death penalty. November 30 is therefore commemorated by 300 cities around the world as Cities for Life Day.
December 4 – Mission Santa Barbara was founded by Padre Fermín Lasuén as the tenth of the Spanish missions in California.
December 20 – Robert Burns' "Address to a Haggis" first published, in Edinburgh.

December 4: Mission Santa Barbara was founded.

Date unknown

The town of Martinsborough, North Carolina, named for Royal Governor Josiah Martin in 1771, was renamed "Greenesville" in honor of United States General Nathanael Greene by the North Carolina General Assembly; the name "Greenesville" was later shortened to become Greenville.
The last reliably recorded wolf in Ireland was hunted down and killed near Mount Leinster, County Carlow, for killing sheep.^[4]