The temperature on November 23, 1911 was between -0.7 °C and 3.0 °C and averaged 1.5 °C. There was 0.3 hours of sunshine (4%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the east-northeast. Source: KNMI
January 5 » Kappa Alpha Psi, the world's third oldest and largest black fraternity, is founded at Indiana University.
January 21 » The first Monte Carlo Rally takes place.
April 2 » The Australian Bureau of Statistics conducts the country's first national census.
May 21 » President of Mexico Porfirio Díaz and the revolutionary Francisco Madero sign the Treaty of Ciudad Juárez to put an end to the fighting between the forces of both men, concluding the initial phase of the Mexican Revolution.
August 1 » Harriet Quimby takes her pilot's test and becomes the first U.S. woman to earn an Aero Club of America aviator's certificate.
August 21 » The Mona Lisa is stolen by Vincenzo Peruggia, a Louvre employee.
Day of marriage December 16, 1933
The temperature on December 16, 1933 was between -8.3 °C and -0.4 °C and averaged -5.0 °C. There was 4.0 hours of sunshine (52%). The average windspeed was 2 Bft (weak wind) and was prevailing from the northeast. Source: KNMI
In The Netherlands , there was from August 10, 1929 to May 26, 1933 the cabinet Ruys de Beerenbrouck III, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
In The Netherlands , there was from May 26, 1933 to July 31, 1935 the cabinet Colijn II, with Dr. H. Colijn (ARP) as prime minister.
March 28 » The Imperial Airways biplane City of Liverpool is believed to be the first airliner lost to sabotage when a passenger sets a fire on board.
April 4 » U.S. Navy airship USSAkron is wrecked off the New Jersey coast due to severe weather.
June 16 » The National Industrial Recovery Act is passed in the United States, allowing businesses to avoid antitrust prosecution if they establish voluntary wage, price, and working condition regulations on an industry-wide basis.
August 27 » The first Afrikaans Bible is introduced during a Bible Festival in Bloemfontein.
September 21 » Salvador Lutteroth establishes Mexican professional wrestling.
December 6 » U.S. federal judge John M. Woolsey rules that James Joyce's novel Ulysses is not obscene.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I199785.php : accessed October 23, 2026), "Frederik Helmholt (1911-)".
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