The temperature on May 15, 1911 was between 9.1 °C and 19.1 °C and averaged 14.3 °C. There was 8.7 hours of sunshine (56%). The average windspeed was 2 Bft (weak wind) and was prevailing from the west. Source: KNMI
March 29 » The M1911 .45 ACP pistol becomes the official U.S. Army side arm.
April 8 » Dutch physicist Heike Kamerlingh Onnes discovers superconductivity.
May 9 » The works of Gabriele D'Annunzio are placed in the Index of Forbidden Books by the Vatican.
September 20 » The White Star Line's RMSOlympic collides with the British warship HMSHawke.
November 11 » Many cities in the Midwestern United States break their record highs and lows on the same day as a strong cold front rolls through.
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 October 25, 1934
The temperature on October 25, 1934 was between 7.6 °C and 17.2 °C and averaged 12.9 °C. There was 4.8 hours of sunshine (48%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south-southeast. Source: KNMI
January 26 » German–Polish Non-Aggression Pact is signed.
February 23 » Leopold III becomes King of Belgium.
March 26 » The United Kingdom driving test is introduced.
May 23 » Infamous American bank robbers Bonnie and Clyde are ambushed by police and killed in Bienville Parish, Louisiana.
July 11 » Engelbert Zaschka of Germany flies his large human-powered aircraft, the Zaschka Human-Power Aircraft, about 20 meters at Berlin Tempelhof Airport without assisted take-off.
August 19 » The first All-American Soap Box Derby is held in Dayton, Ohio.
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/I173121.php : accessed October 8, 2026), "Jan van der Wal (1911-)".
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