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 death September 22, 1768
The temperature on September 22, 1768 was about 14.0 °C. There was 22 mm of rainWind direction mainly northeast. Weather type: donker regen. Source: KNMI
April 4 » In London, Philip Astley stages the first modern circus.
May 10 » Rioting occurs in London after John Wilkes is imprisoned for writing an article for The North Briton severely criticizing King George III.
August 26 » Captain James Cook sets sail from England on board HMSEndeavour.
November 5 » Treaty of Fort Stanwix, the purpose of which is to adjust the boundary line between Indian lands and white settlements set forth in the Royal Proclamation of 1763 in the Thirteen Colonies.
December 10 » The first edition of the Encyclopædia Britannica is published.
December 28 » King Taksin's coronation achieved through conquest as a king of Thailand and established Thonburi as a capital.
When copying data from this family tree, please include a reference to the origin: Marion Spek, "Family tree Spek", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-spek/R2242.php : accessed February 16, 2026), "Johannes Spronck (1709-1768)".
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