January 1 » The first traveler's cheques, which could be used in 90 European cities, were issued by the London Credit Exchange Company.
June 9 » The British schooner Gaspee is burned in Narragansett Bay, Rhode Island.
June 12 » French explorer Marc-Joseph Marion du Fresne and 25 of his men killed by Māori in New Zealand.
August 19 » Gustav III of Sweden stages a coup d'état, in which he assumes power and enacts a new constitution that divides power between the Riksdag and the King.
August 21 » King Gustav III completes his coup d'état by adopting a new Constitution, ending half a century of parliamentary rule in Sweden and installing himself as an enlightened despot.
September 1 » The Mission San Luis Obispo de Tolosa is founded in San Luis Obispo, California.
Day of burial August 8, 1780
The temperature on August 8, 1780 was about 20.0 °C. Wind direction mainly east-northeast. Weather type: omtrent helder. Source: KNMI
March 17 » American Revolution: George Washington grants the Continental Army a holiday "as an act of solidarity with the Irish in their fight for independence".
May 12 » American Revolutionary War: In the largest defeat of the Continental Army, Charleston, South Carolina is taken by British forces.
September 21 » American Revolutionary War: Benedict Arnold gives the British the plans to West Point.
October 2 » American Revolutionary War: John André, a British Army officer, is hanged as a spy by the Continental Army.
October 16 » The Great Hurricane of 1780 finishes after its sixth day, killing between 20,000 and 24,000 residents of the Lesser Antilles.
November 4 » The Rebellion of Túpac Amaru II against Spanish rule in the Viceroyalty of Peru begins.
When copying data from this family tree, please include a reference to the origin: Peter de Jong, "Pedigree of De Jong, Koelé families", database, Genealogy Online (https://www.genealogieonline.nl/de-jong-stamboom/I2866.php : accessed February 16, 2026), "Anthoni Christianus Koelee (-1780)".
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