March 16 » Sir Arthur Evans purchased the land around the ruins of Knossos, the largest Bronze Age archaeological site on Crete.
May 1 » The Scofield Mine disaster kills over 200 men in Scofield, Utah in what is to date the fifth-worst mining accident in United States history.
May 24 » Second Boer War: The United Kingdom annexes the Orange Free State.
May 26 » Thousand Days' War: The Colombian Conservative Party turns the tide of war in their favor with victory against the Colombian Liberal Party in the Battle of Palonegro.
August 16 » The Battle of Elands River during the Second Boer War ends after a 13-day siege is lifted by the British. The battle had begun when a force of between 2,000 and 3,000 Boers had surrounded a force of 500 Australians, Rhodesians, Canadians and British soldiers at a supply dump at Brakfontein Drift.
December 14 » Quantum mechanics: Max Planck presents a theoretical derivation of his black-body radiation law.
Day of marriage April 11, 1922
The average temperature on April 11, 1922 was 6.4 °C. There was 8.1 hours of sunshine (60%). The average windspeed was 5 Bft (very strong wind) and was prevailing from the east-southeast. Source: KNMI
In The Netherlands , there was from September 9, 1918 to September 18, 1922 the cabinet Ruys de Beerenbrouck I, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
In The Netherlands , there was from September 19, 1922 to August 4, 1925 the cabinet Ruys de Beerenbrouck II, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
May 30 » The Lincoln Memorial is dedicated in Washington, D.C..
July 9 » Johnny Weissmuller swims the 100 meters freestyle in 58.6 seconds breaking the world swimming record and the 'minute barrier'.
July 24 » The draft of the British Mandate of Palestine was formally confirmed by the Council of the League of Nations; it came into effect on 26 September 1923.
August 27 » Greco-Turkish War: The Turkish army takes the Aegean city of Afyonkarahisar from the Kingdom of Greece.
August 30 » Battle of Dumlupınar: The final battle in the Greco-Turkish War ("Turkish War of Independence").
December 16 » President of Poland Gabriel Narutowicz is assassinated by Eligiusz Niewiadomski at the Zachęta Gallery in Warsaw.
Day of death September 12, 1935
The temperature on September 12, 1935 was between 4.6 °C and 21.5 °C and averaged 13.7 °C. There was 9.5 hours of sunshine (73%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south east. Source: KNMI
May 24 » The first night game in Major League Baseball history is played in Cincinnati, Ohio, with the Cincinnati Reds beating the Philadelphia Phillies 2–1 at Crosley Field.
June 10 » Dr. Robert Smith takes his last drink, and Alcoholics Anonymous is founded in Akron, Ohio, United States, by him and Bill Wilson.
June 11 » Inventor Edwin Armstrong gives the first public demonstration of FM broadcasting in the United States at Alpine, New Jersey.
June 25 » Colombia–Soviet Union relations are established.
July 28 » First flight of the Boeing B-17 Flying Fortress.
December 12 » Lebensborn Project, a Nazi reproduction program, is founded by Heinrich Himmler.
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/I133675.php : accessed October 23, 2026), "Johanna Jacoba Pos (1900-1935)".
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