January 26 » The 8.7–9.2 Mw Cascadia earthquake takes place off the west coast of North America, as evidenced by Japanese records.
February 27 » The island of New Britain is discovered by Europeans.
February 28 » Today is followed by March 1 in Sweden, thus creating the Swedish calendar.
March 1 » Sweden introduces its own Swedish calendar, in an attempt to gradually merge into the Gregorian calendar, reverts to the Julian calendar on this date in 1712, and introduces the Gregorian calendar on this date in 1753.
Day of marriage June 29, 1721
The temperature on June 29, 1721 was about 17.0 °C. Source: KNMI
January 6 » The Committee of Inquiry on the South Sea Bubble publishes its findings, revealing details of fraud among company directors and corrupt politicians.
March 24 » Johann Sebastian Bach dedicated six concertos to Margrave Christian Ludwig of Brandenburg-Schwedt, now commonly called the Brandenburg Concertos, BWV 1046-1051.
April 4 » Sir Robert Walpole becomes the first British prime minister.
April 26 » A massive earthquake devastates the Iranian city of Tabriz.
August 18 » The city of Shamakhi in Safavid Shirvan is sacked.
October 22 » Russian Empire is proclaimed by Tsar Peter I after the Swedish defeat in the Great Northern War.
When copying data from this family tree, please include a reference to the origin: A. Hakkert , "Family tree Hakkert", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-hakkert/I5019.php : accessed October 31, 2024), "Arien Maarten Zondag (1700-????)".
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