The temperature on June 23, 1926 was between 6.3 °C and 16.5 °C and averaged 12.6 °C. There was 1.9 mm of rain. There was 7.7 hours of sunshine (46%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northwest. Source: KNMI
March 15 » The dictator Theodoros Pangalos is elected President of Greece without opposition.
March 16 » History of Rocketry: Robert Goddard launches the first liquid-fueled rocket, at Auburn, Massachusetts.
April 24 » The Treaty of Berlin is signed. Germany and the Soviet Union each pledge neutrality in the event of an attack on the other by a third party for the next five years.
June 23 » The College Board administers the first SAT exam.
August 6 » Gertrude Ederle becomes the first woman to swim across the English Channel.
October 14 » The children's book Winnie-the-Pooh, by A. A. Milne, is first published.
Day of death December 18, 1927
The temperature on December 18, 1927 was between -14.6 °C and -3.9 °C and averaged -8.6 °C. There was 0.1 mm of rain. There was 3.3 hours of sunshine (43%). The average windspeed was 2 Bft (weak wind) and was prevailing from the north-northwest. Source: KNMI
February 23 » German theoretical physicist Werner Heisenberg writes a letter to fellow physicist Wolfgang Pauli, in which he describes his uncertainty principle for the first time.
June 13 » Aviator Charles Lindbergh receives a ticker tape parade down 5th Avenue in New York City.
June 29 » The Bird of Paradise, a U.S. Army Air Corps Fokker tri-motor, completes the first transpacific flight, from the mainland United States to Hawaii.
August 7 » The Peace Bridge opens between Fort Erie, Ontario and Buffalo, New York.
August 23 » Italian anarchists Sacco and Vanzetti are executed after a lengthy, controversial trial.
October 4 » Gutzon Borglum begins sculpting Mount Rushmore.
When copying data from this family tree, please include a reference to the origin: Peter Keesman, "Family tree Keesman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-keesman/I3468.php : accessed February 14, 2026), "Nicolaas Marinus Erfmann (1926-1927)".
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