The temperature on March 22, 1911 was between 2.5 °C and 16.6 °C and averaged 10.0 °C. There was 7.9 hours of sunshine (64%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-southeast. Source: KNMI
April 29 » Tsinghua University, one of mainland China's leading universities, is founded.
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.
July 4 » A massive heat wave strikes the northeastern United States, killing 380 people in eleven days and breaking temperature records in several cities.
September 1 » The armored cruiser Georgios Averof is commissioned into the Greek Navy. It now serves as a museum ship.
September 23 » Pilot Earle Ovington makes the first official airmail delivery in America under the authority of the United States Post Office Department
October 9 » An accidental bomb explosion triggers the Wuchang Uprising against the Chinese monarchy.
Day of marriage September 9, 1937
The temperature on September 9, 1937 was between 6.5 °C and 16.2 °C and averaged 11.9 °C. There was 2.6 mm of rain during 2.3 hours. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
May 28 » Volkswagen, the German automobile manufacturer is founded.
June 11 » Great Purge: The Soviet Union under Joseph Stalin executes eight army leaders.
July 9 » The silent film archives of Fox Film Corporation are destroyed by the 1937 Fox vault fire.
August 1 » Josip Broz Tito reads the resolution "Manifesto of constitutional congress of KPH" to the constitutive congress of KPH (Croatian Communist Party) in woods near Samobor.
August 13 » Second Sino-Japanese War: The Battle of Shanghai begins.
December 11 » Second Italo-Ethiopian War: Italy leaves the League of Nations.
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/I183281.php : accessed October 5, 2026), "Derk Willem Weening (1911-)".
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