March 10 » French Huguenot Jean Calas, who had been wrongly convicted of killing his son, dies after being tortured by authorities; the event inspired Voltaire to begin a campaign for religious tolerance and legal reform.
May 5 » Russia and Prussia sign the Treaty of St. Petersburg.
May 22 » Sweden and Prussia sign the Treaty of Hamburg.
May 22 » Trevi Fountain is officially completed and inaugurated in Rome.
June 24 » Battle of Wilhelmsthal: The British-Hanoverian army of Ferdinand of Brunswick defeats French forces in Westphalia.
September 15 » Seven Years' War: Battle of Signal Hill.
Day of burial June 24, 1780
The temperature on June 24, 1780 was about 15.0 °C. Wind direction mainly south-southwest. Weather type: zeer betrokken. Source: KNMI
January 16 » American Revolutionary War: Battle of Cape St. Vincent.
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.
May 29 » American Revolutionary War: At the Battle of Waxhaws, the British continue attacking after the Continentals lay down their arms, killing 113 and critically wounding all but 53 that remained.
August 16 » American Revolutionary War: Battle of Camden: The British defeat the Americans near Camden, South Carolina.
October 16 » The Great Hurricane of 1780 finishes after its sixth day, killing between 20,000 and 24,000 residents of the Lesser Antilles.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I301.php : accessed February 9, 2026), "Bareld Gelmers (± 1735-????)".
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