March 14 » Admiral Sir John Byng is executed by firing squad aboard HMSMonarch for breach of the Articles of War.
May 6 » Battle of Prague: A Prussian army fights an Austrian army in Prague during the Seven Years' War.
May 6 » The end of Konbaung–Hanthawaddy War, and the end of Burmese Civil War (1740–1757).
November 5 » Seven Years' War: Frederick the Great defeats the allied armies of France and the Holy Roman Empire at the Battle of Rossbach.
December 5 » Seven Years' War: Battle of Leuthen: Frederick II of Prussia leads Prussian forces to a decisive victory over Austrian forces under Prince Charles Alexander of Lorraine.
December 31 » Empress Elizabeth I of Russia issues her ukase incorporating Königsberg into Russia.
Day of burial April 28, 1786
The temperature on April 28, 1786 was about 6.0 °C. Wind direction mainly north. Weather type: betrokken mist. Source: KNMI
May 1 » In Vienna, Austria, Mozart's opera The Marriage of Figaro is performed for the first time.
August 7 » The first federal Indian Reservation is created by the United States.
September 11 » The beginning of the Annapolis Convention.
November 7 » The oldest musical organization in the United States is founded as the Stoughton Musical Society.
November 30 » The Grand Duchy of Tuscany, under Pietro Leopoldo I, becomes the first modern state to abolish the death penalty (later commemorated as Cities for Life Day).
December 4 » Mission Santa Barbara is dedicated (on the feast day of Saint Barbara).
When copying data from this family tree, please include a reference to the origin: Yvonne Groos, "Family tree Groos", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-groos/I100.php : accessed February 17, 2026), "Jaapje Rensen (1757-????)".
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