The temperature on January 18, 1911 was between 1.4 °C and 5.0 °C and averaged 3.5 °C. There was 0.1 mm of rain. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west. Source: KNMI
January 21 » The first Monte Carlo Rally takes place.
March 29 » The M1911 .45 ACP pistol becomes the official U.S. Army side arm.
May 15 » In Standard Oil Co. of New Jersey v. United States, the United States Supreme Court declares Standard Oil to be an "unreasonable" monopoly under the Sherman Antitrust Act and orders the company to be broken up.
July 1 » Germany despatches the gunship SMSPanther to Morocco, sparking the Agadir Crisis.
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.
November 3 » Chevrolet officially enters the automobile market in competition with the Ford Model T.
Day of marriage September 24, 1930
The temperature on September 24, 1930 was between 13.2 °C and 19.9 °C and averaged 16.3 °C. There was 2.8 mm of rain during 2.2 hours. There was -0.1 hours of sunshine (0%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south. 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.
January 6 » The first diesel-powered automobile trip is completed, from Indianapolis, Indiana, to New York, New York.
February 18 » While studying photographs taken in January, Clyde Tombaugh discovers Pluto.
April 28 » The Independence Producers hosted the first night game in the history of Organized Baseball in Independence, Kansas.
May 1 » "Pluto" is officially proposed for the name of the newly-discovered dwarf planet Pluto by Vesto Slipher in the Lowell Observatory Observation Circular. The name quickly catches on.
August 7 » The last confirmed lynching of blacks in the Northern United States occurs in Marion, Indiana; two men, Thomas Shipp and Abram Smith, are killed.
October 27 » Ratifications exchanged in London for the first London Naval Treaty go into effect immediately, further limiting the expensive naval arms race among its five signatories.
When copying data from this family tree, please include a reference to the origin: Eva Drenth, "Family tree Diverse", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-drenth/I13200.php : accessed February 17, 2026), "George Jonkman (1911-)".
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