The temperature on May 31, 1911 was between 14.1 °C and 26.0 °C and averaged 20.4 °C. There was 13.3 hours of sunshine (81%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the east-southeast. Source: KNMI
March 29 » The M1911 .45 ACP pistol becomes the official U.S. Army side arm.
May 9 » The works of Gabriele D'Annunzio are placed in the Index of Forbidden Books by the Vatican.
May 30 » At the Indianapolis Motor Speedway, the first Indianapolis 500 ends with Ray Harroun in his Marmon Wasp becoming the first winner of the 500-mile auto race.
June 22 » George V and Mary of Teck are crowned King and Queen of the United Kingdom of Great Britain and Ireland.
September 1 » The armored cruiser Georgios Averof is commissioned into the Greek Navy. It now serves as a museum ship.
October 13 » Prince Arthur, Duke of Connaught and Strathearn, becomes the first Governor General of Canada of royal descent.
When copying data from this family tree, please include a reference to the origin: P. Heres, "Family tree Apool", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-apool/I1099499484.php : accessed March 5, 2026), "Geertje Olthuis (1911-1911)".
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