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
April 6 » During the Battle of Deçiq, Dedë Gjon Luli Dedvukaj, leader of the Malësori Albanians, raises the Albanian flag in the town of Tuzi, Montenegro, for the first time after George Kastrioti (Skanderbeg).
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.
July 4 » A massive heat wave strikes the northeastern United States, killing 380 people in eleven days and breaking temperature records in several cities.
October 10 » The day after a bomb explodes prematurely, the Wuchang Uprising begins against the Chinese monarchy.
November 17 » Omega Psi Phi fraternity was founded on the campus of Howard University in Washington, D.C.
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
February 18 » Second Sino-Japanese War: During the Nanking Massacre, the Nanking Safety Zone International Committee is renamed "Nanking International Rescue Committee", and the safety zone in place for refugees falls apart.
April 10 » The 1938 German parliamentary election and referendum seeks approval for a single list of Nazi candidates and the recent annexation of Austria.
June 23 » The Civil Aeronautics Act is signed into law, forming the Civil Aeronautics Authority in the United States.
July 28 » Hawaii Clipper disappears between Guam and Manila as the first loss of an airliner in trans-Pacific China Clipper service.
July 31 » Bulgaria signs a non-aggression pact with Greece and other states of Balkan Antanti (Turkey, Romania, Yugoslavia).
September 12 » Adolf Hitler demands autonomy and self-determination for the Germans of the Sudetenland region of Czechoslovakia.
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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