The temperature on December 12, 1911 was between 0.5 °C and 6.4 °C and averaged 3.0 °C. There was 5.5 hours of sunshine (70%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south. Source: KNMI
January 12 » The University of the Philippines College of Law is formally established; three future Philippine presidents are among the first enrollees.
May 19 » Parks Canada, the world's first national park service, is established as the Dominion Parks Branch under the Department of the Interior.
June 28 » The Nakhla meteorite, the first one to suggest signs of aqueous processes on Mars, falls to Earth, landing in Egypt.
August 1 » Harriet Quimby takes her pilot's test and becomes the first U.S. woman to earn an Aero Club of America aviator's certificate.
August 21 » The Mona Lisa is stolen by Vincenzo Peruggia, a Louvre employee.
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: Elly Gelderman, "Family tree Gelderman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-gelderman/I5587.php : accessed January 30, 2026), "Harm Jan Joostema (1911-)".
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