February 29 » King Alaungpaya founds Konbaung Dynasty, the last dynasty of Burmese monarchy.
April 20 » Start of Konbaung–Hanthawaddy War, a new phase in the Burmese Civil War (1740–57).
June 15 » Benjamin Franklin proves that lightning is electricity (traditional date, the exact date is unknown).
September 2 » Great Britain, along with its overseas possessions, adopts the Gregorian calendar.
September 14 » The British Empire adopts the Gregorian calendar, skipping eleven days (the previous day was September 2).
Day of marriage October 30, 1779
The temperature on October 30, 1779 was about 13.0 °C. There was 48 mm of rainWind direction mainly west-northwest. Weather type: regen geheel betrokken. Source: KNMI
January 11 » Ching-Thang Khomba is crowned King of Manipur.
February 14 » James Cook is killed by Native Hawaiians near Kealakekua on the Island of Hawaii.
March 3 » American Revolutionary War: The Continental Army is routed at the Battle of Brier Creek near Savannah, Georgia.
June 1 » The court-martial for malfeasance of Benedict Arnold, a general in the Continental Army during the American Revolutionary War, begins.
July 16 » American Revolutionary War: Light infantry of the Continental Army seize a fortified British Army position in a midnight bayonet attack at the Battle of Stony Point.
August 13 » American Revolutionary War: The Royal Navy defeats the Penobscot Expedition with the most significant loss of United States naval forces prior to the attack on Pearl Harbor.
Day of death April 21, 1790
The temperature on April 21, 1790 was about 8.0 °C. Wind direction mainly east-northeast. Weather type: omtrent helder. Source: KNMI
January 8 » George Washington delivers the first State of the Union address in New York City.
March 1 » The first United States census is authorized.
March 4 » France is divided into 83 départements, cutting across the former provinces in an attempt to dislodge regional loyalties based on ownership of land by the nobility.
May 31 » Manuel Quimper explores the Strait of Juan de Fuca.
July 12 » The Civil Constitution of the Clergy is passed in France by the National Constituent Assembly.
July 31 » The first U.S. patent is issued, to inventor Samuel Hopkins for a potash process.
When copying data from this family tree, please include a reference to the origin: Marie-Anne de Lange, "Family tree De Lange-Kranz", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-de-lange-kranz/I4373.php : accessed August 8, 2025), "Jan Jacobszn van der Spek (1752-1790)".
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