February 12 » Gustav III becomes the King of Sweden.
May 16 » The Battle of Alamance, a pre-American Revolutionary War battle between local militia and a group of rebels called The "Regulators", occurs in present-day Alamance County, North Carolina.
July 14 » Foundation of the Mission San Antonio de Padua in modern California by the Franciscan friar Junípero Serra.
July 17 » Bloody Falls massacre: Chipewyan chief Matonabbee, traveling as the guide to Samuel Hearne on his Arctic overland journey, massacres a group of unsuspecting Inuit.
October 17 » Premiere in Milan of the opera Ascanio in Alba, composed by Mozart at age 15.
Day of death June 30, 1780
The temperature on June 30, 1780 was about 23.0 °C. Wind direction mainly east-southeast. Weather type: helder. Source: KNMI
May 12 » American Revolutionary War: In the largest defeat of the Continental Army, Charleston, South Carolina is taken by British forces.
May 13 » The Cumberland Compact is signed by leaders of the settlers in the Cumberland River area of what would become the U.S. state of Tennessee, providing for democratic government and a formal system of justice.
May 19 » New England's Dark Day, an unusual darkening of the day sky, was observed over the New England states and parts of Canada.
October 7 » American Revolutionary War: American militia defeat royalist irregulars led by British major Patrick Ferguson in South Carolina.
October 16 » American Revolutionary War: The British-led Royalton raid is the last Native American raid on New England.
November 5 » French-American forces under Colonel LaBalme are defeated by Miami Chief Little Turtle.
When copying data from this family tree, please include a reference to the origin: Dick Krabbendam, "Genealogy Claes Coster", database, Genealogy Online (https://www.genealogieonline.nl/genealogie-coster/I1069455455.php : accessed January 31, 2026), "Trijntje/Cornelis Jacobs (????-1780)".
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