February 7 » Second Boer War: British troops fail in their third attempt to lift the Siege of Ladysmith.
February 27 » Second Boer War: In South Africa, British military leaders receive an unconditional notice of surrender from Boer General Piet Cronjé at the Battle of Paardeberg.
May 18 » The United Kingdom proclaims a protectorate over Tonga.
June 18 » Empress Dowager Cixi of China orders all foreigners killed, including foreign diplomats and their families.
July 27 » Kaiser Wilhelm II makes a speech comparing Germans to Huns; for years afterwards, "Hun" would be a disparaging name for Germans.
December 14 » Quantum mechanics: Max Planck presents a theoretical derivation of his black-body radiation law.
Day of marriage October 6, 1921
The temperature on October 6, 1921 was between 11.9 °C and 23.1 °C and averaged 16.3 °C. There was 9.4 hours of sunshine (83%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south east. 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.
March 1 » The Australian cricket team captained by Warwick Armstrong becomes the first team to complete a whitewash of The Ashes, something that would not be repeated for 86 years.
April 2 » The Autonomous Government of Khorasan, a military government encompassing the modern state of Iran, is established.
July 23 » The Communist Party of China (CPC) is established at the founding National Congress.
August 23 » British airship R-38 experiences structural failure over Hull in England and crashes in the Humber Estuary. Of her 49 British and American training crew, only four survive.
August 28 » The Red Army dissolved the Free Territory, after driving the Black Army out of Ukraine.
October 29 » United States: Second trial of Sacco and Vanzetti in Boston, Massachusetts.
Day of death March 1, 1957
The temperature on March 1, 1957 was between -1.8 °C and 7.6 °C and averaged 2.8 °C. There was 8.6 hours of sunshine (79%). The partly clouded was. The average windspeed was 5 Bft (very strong wind) and was prevailing from the south east. Source: KNMI
January 5 » In a speech given to the United States Congress, United States President Dwight D. Eisenhower announces the establishment of what will later be called the Eisenhower Doctrine.
January 11 » The African Convention is founded in Dakar, Senegal.
January 23 » American inventor Walter Frederick Morrison sells the rights to his flying disc to the Wham-O toy company, which later renames it the "Frisbee".
July 28 » Heavy rain and a mudslide in Isahaya, western Kyushu, Japan, kills 992.
November 1 » The Mackinac Bridge, the world's longest suspension bridge between anchorages at the time, opens to traffic connecting Michigan's upper and lower peninsulas.
November 8 » Pan Am Flight 7 disappears between San Francisco and Honolulu. Wreckage and bodies are discovered a week later.
When copying data from this family tree, please include a reference to the origin: Claudia Vreugdenhil, "Family tree Kaptein", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-kaptein/I9232.php : accessed February 27, 2026), "Leendert KAPTEIJN (1900-1957)".
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