The temperature on December 21, 1911 was between 4.6 °C and 8.1 °C and averaged 6.0 °C. There was 2.0 mm of rain. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south-southwest. Source: KNMI
March 29 » The M1911 .45 ACP pistol becomes the official U.S. Army side arm.
April 29 » Tsinghua University, one of mainland China's leading universities, is founded.
May 15 » More than 300 Chinese immigrants are killed in the Torreón massacre when the forces of the Mexican Revolution led by Emilio Madero take the city of Torreón from the Federales.
October 10 » The day after a bomb explodes prematurely, the Wuchang Uprising begins against the Chinese monarchy.
November 17 » Omega Psi Phi fraternity was founded on the campus of Howard University in Washington, D.C.
December 29 » Mongolia gains independence from the Qing dynasty, enthroning 8th Jebtsundamba Khutughtu as Khagan of Mongolia.
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/I119217.php : accessed October 17, 2026), "Willemke Bies (1911-)".
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