March 7 » The German liner SSKaiser Wilhelm der Grosse becomes the first ship to send wireless signals to shore.
May 24 » Second Boer War: The United Kingdom annexes the Orange Free State.
June 9 » Indian nationalist Birsa Munda dies of cholera in a British prison.
October 9 » The Cook Islands become a territory of the United Kingdom.
October 19 » Max Planck discovers Planck's law of black-body radiation.
December 14 » Quantum mechanics: Max Planck presents a theoretical derivation of his black-body radiation law.
Day of death April 18, 1963
The temperature on April 18, 1963 was between 3.7 °C and 13.2 °C and averaged 9.0 °C. There was 3.3 mm of rain during 2.0 hours. There was 2.2 hours of sunshine (16%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the south-southwest. Source: KNMI
April 24 » Marriage of Princess Alexandra of Kent to Angus Ogilvy at Westminster Abbey in London.
May 3 » The police force in Birmingham, Alabama switches tactics and responds with violent force to stop the "Birmingham campaign" protesters. Images of the violent suppression are transmitted worldwide, bringing new-found attention to the civil rights movement.
May 25 » The Organisation of African Unity is established in Addis Ababa, Ethiopia.
May 30 » A protest against pro-Catholic discrimination during the Buddhist crisis is held outside South Vietnam's National Assembly, the first open demonstration during the eight-year rule of Ngo Dinh Diem.
August 28 » March on Washington for Jobs and Freedom: The Reverend Martin Luther King, Jr. gives his I Have a Dream speech.
October 10 » France cedes control of the Bizerte naval base to Tunisia.
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/I130691.php : accessed December 31, 2025), "Jantje Bonsema (1900-1963)".
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