The temperature on April 15, 1906 was between 0.2 °C and 12.2 °C and averaged 7.2 °C. There was 12.4 hours of sunshine (89%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
In The Netherlands , there was from August 17, 1905 to February 11, 1908 the cabinet De Meester, with Mr. Th. de Meester (unie-liberaal) as prime minister.
June 8 » Theodore Roosevelt signs the Antiquities Act into law, authorizing the President to restrict the use of certain parcels of public land with historical or conservation value.
June 26 » The first Grand Prix motor race is held at Le Mans.
August 13 » The all black infantrymen of the U.S. Army's 25th Infantry Regiment are accused of killing a white bartender and wounding a white police officer in Brownsville, Texas, despite exculpatory evidence; all are later dishonorably discharged. (Their records were later restored to reflect honorable discharges but there were no financial settlements.)
September 1 » The International Federation of Intellectual Property Attorneys is established.
November 9 » Theodore Roosevelt is the first sitting President of the United States to make an official trip outside the country. He did so to inspect progress on the Panama Canal.
November 24 » A 13–6 victory by the Massillon Tigers over their rivals, the Canton Bulldogs, for the "Ohio League" Championship, leads to accusations that the championship series was fixed and results in the first major scandal in professional American football.
Day of marriage July 3, 1933
The temperature on July 3, 1933 was between 12.7 °C and 23.8 °C and averaged 18.5 °C. There was 11.7 hours of sunshine (70%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north. 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 30 » Adolf Hitler is sworn in as Chancellor of Germany.
February 10 » In round 13 of a boxing match at New York City's Madison Square Garden, Primo Carnera knocks out Ernie Schaaf. Schaaf dies four days later.
February 20 » Adolf Hitler secretly meets with German industrialists to arrange for financing of the Nazi Party's upcoming election campaign.
July 22 » Aviator Wiley Post returns to Floyd Bennett Field in New York City, completing the first solo flight around the world in seven days, 18 hours and 49 minutes.
August 25 » The Diexi earthquake strikes Mao County, Sichuan, China and kills 9,000 people.
October 10 » A United Airlines Boeing 247 is destroyed by sabotage, the first such proven case in the history of commercial aviation.
Day of death May 21, 1943
The temperature on May 21, 1943 was between 10.0 °C and 24.4 °C and averaged 17.1 °C. There was 11.3 hours of sunshine (71%). The average windspeed was 2 Bft (weak wind) and was prevailing from the southwest. Source: KNMI
In The Netherlands , there was from July 27, 1941 to February 23, 1945 the cabinet Gerbrandy II, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
January 18 » Warsaw Ghetto Uprising: The first uprising of Jews in the Warsaw Ghetto.
March 14 » The liquidation of the Kraków Ghetto is completed.
May 14 » World War II: A Japanese submarine sinks AHSCentaur off the coast of Queensland.
July 4 » World War II: The Battle of Kursk, the largest full-scale battle in history and the world's largest tank battle, begins in the village of Prokhorovka.
August 17 » World War II: The U.S. Seventh Army under General George S. Patton arrives in Messina, Italy, followed several hours later by the British 8th Army under Field Marshal Bernard Montgomery, thus completing the Allied conquest of Sicily.
November 29 » World War II: The second session of the Anti-Fascist Council for the National Liberation of Yugoslavia (AVNOJ), held to determine the post-war ordering of the country, concludes in Jajce (present-day Bosnia and Herzegovina).
When copying data from this family tree, please include a reference to the origin: Joop Klavers, "Family tree Klavers", database, Genealogy Online (https://www.genealogieonline.nl/stamboom_klavers/I2287.php : accessed February 2, 2026), "Hendrika Aaltje Kooperberg (1906-1943)".
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