The temperature on April 20, 1912 was between 3.4 °C and 19.5 °C and averaged 12.7 °C. There was 9.3 hours of sunshine (66%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
February 14 » The U.S. Navy commissions its first class of diesel-powered submarines.
April 16 » Harriet Quimby becomes the first woman to fly an airplane across the English Channel.
June 4 » Massachusetts becomes the first state of the United States to set a minimum wage.
August 6 » The Bull Moose Party meets at the Chicago Coliseum.
September 28 » Corporal Frank S. Scott of the United States Army becomes the first enlisted man to die in an airplane crash.
October 18 » First Balkan War: King Peter I of Serbia issues a declaration "To the Serbian People", as his country joins the war.
Day of marriage February 14, 1952
The temperature on February 14, 1952 was between -2.6 °C and 2.9 °C and averaged -0.3 °C. There was 0.2 mm of rain during 1.1 hours. There was 2.3 hours of sunshine (23%). The partly or heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-southeast. Source: KNMI
April 8 » U.S. President Harry Truman calls for the seizure of all domestic steel mills in an attempt to prevent the 1952 steel strike.
June 26 » The Pan-Malayan Labour Party is founded in Malaya, as a union of statewide labour parties.
September 15 » The United Nations cedes Eritrea to Ethiopia.
October 3 » The United Kingdom successfully tests a nuclear weapon to become the world's third nuclear power.
November 25 » Agatha Christie's murder-mystery play The Mousetrap opens at the Ambassadors Theatre in London. It will become the longest continuously-running play in history.
December 1 » The New York Daily News reports the news of Christine Jorgensen, the first notable case of sex reassignment surgery.
Day of death June 10, 1961
The temperature on June 10, 1961 was between 5.5 °C and 19.2 °C and averaged 13.6 °C. There was 10.0 hours of sunshine (60%). The partly clouded was. The average windspeed was 1 Bft (weak wind) and was prevailing from the southwest. Source: KNMI
January 8 » In France a referendum supports Charles de Gaulle's policies in Algeria.
February 12 » The Soviet Union launches Venera 1 towards Venus.
April 16 » In a nationally broadcast speech, Cuban leader Fidel Castro declares that he is a Marxist–Leninist and that Cuba is going to adopt Communism.
May 19 » Venera program: Venera 1 becomes the first man-made object to fly by another planet by passing Venus (the probe had lost contact with Earth a month earlier and did not send back any data).
August 21 » Motown releases what would be its first #1 hit (in America), "Please Mr. Postman" by The Marvelettes.
October 20 » The Soviet Union performs the first armed test of a submarine-launched ballistic missile, launching an R-13 from a Golf-class submarine.
When copying data from this family tree, please include a reference to the origin: Michael Jacobs, "Family tree Jacobs", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-michael-jacobs/I34296.php : accessed February 5, 2026), "Cyriel van Landschoot (1912-1961)".
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