The temperature on April 2, 1911 was between 4.8 °C and 7.6 °C and averaged 6.0 °C. The average windspeed was 2 Bft (weak wind) and was prevailing from the north. Source: KNMI
May 9 » The works of Gabriele D'Annunzio are placed in the Index of Forbidden Books by the Vatican.
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.
August 24 » Manuel de Arriaga is elected and sworn-in as the first President of Portugal.
October 5 » The Kowloon–Canton Railway commences service.
October 9 » An accidental bomb explosion triggers the Wuchang Uprising against the Chinese monarchy.
November 1 » World's first combat aerial bombing mission takes place in Libya during the Italo-Turkish War. Second Lieutenant Giulio Gavotti of Italy drops several small bombs.
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/I121865.php : accessed February 13, 2026), "Jan Willem Hietland (1911-)".
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