The temperature on August 19, 1911 was between 11.1 °C and 22.3 °C and averaged 17.0 °C. There was 8.6 hours of sunshine (59%). The average windspeed was 2 Bft (weak wind) and was prevailing from the north. Source: KNMI
January 18 » Eugene B. Ely lands on the deck of the USSPennsylvania anchored in San Francisco Bay, the first time an aircraft landed on a ship.
April 2 » The Australian Bureau of Statistics conducts the country's first national census.
August 14 » United States Senate leaders agree to rotate the office of President pro tempore of the Senate among leading candidates to fill the vacancy left by William P. Frye's death.
September 24 » His Majesty's Airship No. 1, Britain's first rigid airship, is wrecked by strong winds before her maiden flight at Barrow-in-Furness.
November 19 » The Doom Bar in Cornwall claimed two ships, Island Maid and Angele, the latter killing the entire crew except the captain.
December 14 » Roald Amundsen's team, comprising himself, Olav Bjaaland, Helmer Hanssen, Sverre Hassel, and Oscar Wisting, becomes the first to reach the South Pole.
Day of marriage April 25, 1938
The temperature on April 25, 1938 was between 3.7 °C and 13.1 °C and averaged 7.8 °C. There was 0.4 mm of rain during 0.3 hours. There was 5.2 hours of sunshine (36%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north. Source: KNMI
March 27 » Second Sino-Japanese War: The Battle of Taierzhuang begins, resulting several weeks later in the war's first major Chinese victory over Japan.
June 7 » Second Sino-Japanese War: The Chinese Nationalist government creates the 1938 Yellow River flood to halt Japanese forces. Five hundred to nine hundred thousand civilians are killed.
September 30 » The League of Nations unanimously outlaws "intentional bombings of civilian populations".
November 1 » Seabiscuit defeats War Admiral in an upset victory during a match race deemed "the match of the century" in horse racing.
November 16 » LSD is first synthesized by Albert Hofmann from ergotamine at the Sandoz Laboratories in Basel.
December 17 » Otto Hahn discovers the nuclear fission of the heavy element uranium, the scientific and technological basis of nuclear energy.
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/I208246.php : accessed October 15, 2026), "Willem Swieringa (1911-)".
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