The temperature on January 1, 1911 was between 0.4 °C and 5.9 °C and averaged 3.5 °C. There was 5.9 mm of rain. There was 1.0 hours of sunshine (13%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
January 12 » The University of the Philippines College of Law is formally established; three future Philippine presidents are among the first enrollees.
January 14 » Roald Amundsen's South Pole expedition makes landfall on the eastern edge of the Ross Ice Shelf.
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 7 » The United States, UK, Japan, and Russia sign the North Pacific Fur Seal Convention of 1911 banning open-water seal hunting, the first international treaty to address wildlife preservation issues.
August 21 » The Mona Lisa is stolen by Vincenzo Peruggia, a Louvre employee.
September 23 » Pilot Earle Ovington makes the first official airmail delivery in America under the authority of the United States Post Office Department
Day of marriage May 11, 1933
The temperature on May 11, 1933 was between 6.7 °C and 16.1 °C and averaged 10.3 °C. There was 2.3 mm of rain during 1.9 hours. There was 1.8 hours of sunshine (12%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northwest. Source: KNMI
In The Netherlands , there was from August 10, 1929 to May 26, 1933 the cabinet Ruys de Beerenbrouck III, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
In The Netherlands , there was from May 26, 1933 to July 31, 1935 the cabinet Colijn II, with Dr. H. Colijn (ARP) as prime minister.
January 24 » The 20th Amendment to the United States Constitution is ratified, changing the beginning and end of terms for all elected federal offices.
March 4 » Franklin D. Roosevelt becomes the 32nd President of the United States.
April 26 » The Gestapo, the official secret police force of Nazi Germany, is established.
August 27 » The first Afrikaans Bible is introduced during a Bible Festival in Bloemfontein.
September 8 » Ghazi bin Faisal became King of Iraq.
November 8 » Great Depression: New Deal: US President Franklin D. Roosevelt unveils the Civil Works Administration, an organization designed to create jobs for more than 4 million unemployed.
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/I139965.php : accessed October 20, 2026), "Jan Kooistra (1911-)".
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