January 6 » Second Boer War: Having already besieged the fortress at Ladysmith, Boer forces attack it, but are driven back by British defenders.
May 17 » Second Boer War: British troops relieve Mafeking.
June 9 » Indian nationalist Birsa Munda dies of cholera in a British prison.
June 14 » The second German Naval Law calls for the Imperial German Navy to be doubled in size, resulting in an Anglo-German naval arms race.
November 7 » The People's Party is founded in Cuba.
December 14 » Quantum mechanics: Max Planck presents a theoretical derivation of his black-body radiation law.
Day of marriage October 2, 1925
The temperature on October 2, 1925 was between 7.7 °C and 16.6 °C and averaged 11.7 °C. There was 6.8 hours of sunshine (59%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
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.
In The Netherlands , there was from August 4, 1925 to March 8, 1926 the cabinet Colijn I, with Dr. H. Colijn (ARP) as prime minister.
February 15 » The 1925 serum run to Nome: The second delivery of serum arrives in Nome, Alaska.
February 21 » The New Yorker publishes its first issue.
May 25 » Scopes Trial: John T. Scopes is indicted for teaching human evolution in Tennessee.
September 8 » Rif War: Spanish forces including troops from the Foreign Legion under Colonel Francisco Franco landing at Al Hoceima, Morocco.
November 5 » Secret agent Sidney Reilly, the first "super-spy" of the 20th century, is executed by the OGPU, the secret police of the Soviet Union.
Day of death April 21, 1961
The temperature on April 21, 1961 was between 9.3 °C and 17.9 °C and averaged 12.9 °C. There was 3.0 mm of rain during 3.0 hours. There was 0.4 hours of sunshine (3%). The heavily clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the south. Source: KNMI
April 20 » Cold War: Failure of the Bay of Pigs Invasion of US-backed Cuban exiles against Cuba.
May 21 » American civil rights movement: Alabama Governor John Malcolm Patterson declares martial law in an attempt to restore order after race riots break out.
June 1 » The Canadian Bank of Commerce and Imperial Bank of Canada merge to form the Canadian Imperial Bank of Commerce, the largest bank merger in Canadian history.
July 20 » French military forces break the Tunisian siege of Bizerte.
November 11 » Thirteen Italian Air Force servicemen, deployed to the Congo as a part of the UN peacekeeping force, are massacred by a mob in Kindu.
November 18 » United States President John F. Kennedy sends 18,000 military advisors to South Vietnam.
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/I398487.php : accessed January 31, 2026), "Johanna de Groot (1900-1961)".
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