The temperature on November 20, 1911 was between 2.9 °C and 7.9 °C and averaged 5.7 °C. There was 6.6 mm of rain. There was 1.8 hours of sunshine (21%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west-northwest. Source: KNMI
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.
May 30 » At the Indianapolis Motor Speedway, the first Indianapolis 500 ends with Ray Harroun in his Marmon Wasp becoming the first winner of the 500-mile auto race.
May 31 » The President of Mexico Porfirio Díaz flees the country during the Mexican Revolution.
June 16 » IBM founded as the Computing-Tabulating-Recording Company in Endicott, New York.
December 29 » Mongolia gains independence from the Qing dynasty, enthroning 8th Jebtsundamba Khutughtu as Khagan of Mongolia.
Day of marriage May 19, 1934
The temperature on May 19, 1934 was between 2.0 °C and 19.8 °C and averaged 13.0 °C. There was 11.2 hours of sunshine (71%). The average windspeed was 2 Bft (weak wind) and was prevailing from the south. Source: KNMI
February 23 » Leopold III becomes King of Belgium.
May 19 » Zveno and the Bulgarian Army engineer a coup d'état and install Kimon Georgiev as the new Prime Minister of Bulgaria.
July 11 » Engelbert Zaschka of Germany flies his large human-powered aircraft, the Zaschka Human-Power Aircraft, about 20 meters at Berlin Tempelhof Airport without assisted take-off.
November 11 » The Shrine of Remembrance in Melbourne, Australia is opened.
November 30 » The LNER Class A3 4472 Flying Scotsman becomes the first steam locomotive to be authenticated as reaching 100mph.
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/I137990.php : accessed October 24, 2026), "Ymkje Witveen (1911-)".
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