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
February 18 » The first official flight with airmail takes place from Allahabad, United Provinces, British India (now India), when Henri Pequet, a 23-year-old pilot, delivers 6,500 letters to Naini, about 10 kilometres (6.2mi) away.
June 16 » IBM founded as the Computing-Tabulating-Recording Company in Endicott, New York.
July 7 » The United States, UK, Japan, and Russia sign the North Pacific Fur Seal Convention of 1911 banning open-water seal hunting, the first international treaty to address wildlife preservation issues.
October 9 » An accidental bomb explosion triggers the Wuchang Uprising against the Chinese monarchy.
October 10 » The day after a bomb explodes prematurely, the Wuchang Uprising begins against the Chinese monarchy.
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
April 12 » The strongest surface wind gust in the world at the time of 231mph, is measured on the summit of Mount Washington, New Hampshire. It has since been surpassed.
May 23 » The Auto-Lite strike culminates in the "Battle of Toledo", a five-day melée between 1,300 troops of the Ohio National Guard and 6,000 picketers.
June 15 » The United States Great Smoky Mountains National Park is founded.
October 16 » Chinese Communists begin the Long March to escape Nationalist encirclement.
October 22 » In East Liverpool, Ohio, FBI agents shoot and kill notorious bank robber Pretty Boy Floyd.
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 22, 2026), "Ymkje Witveen (1911-)".
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