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
January 6 » German geophysicist Alfred Wegener first presents his theory of continental drift.
April 2 » The ill-fated RMSTitanic begins sea trials.
April 16 » Harriet Quimby becomes the first woman to fly an airplane across the English Channel.
May 5 » Pravda, the "voice" of the Communist Party of the Soviet Union, begins publication in Saint Petersburg.
October 17 » Bulgaria, Greece and Serbia declare war on the Ottoman Empire, joining Montenegro in the First Balkan War.
December 28 » The first municipally owned streetcars take to the streets in San Francisco.
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
July 23 » General Muhammad Naguib leads the Free Officers Movement (formed by Gamal Abdel Nasser, the real power behind the coup) in overthrowing King Farouk of Egypt.
September 15 » The United Nations cedes Eritrea to Ethiopia.
October 8 » The Harrow and Wealdstone rail crash kills 112 people.
November 4 » The United States government establishes the National Security Agency, or NSA.
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 20 » A United States Air Force C-124 crashes and burns in Moses Lake, Washington killing 87.
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 9 » British authorities announce they have uncovered the Soviet Portland Spy Ring in London.
March 1 » Uganda becomes self-governing and holds its first elections.
May 5 » Alan Shepard becomes the first American to travel into outer space, on a sub-orbital flight.
May 30 » The long-time Dominican dictator Rafael Trujillo is assassinated in Santo Domingo, Dominican Republic.
August 13 » Cold War: East Germany closes the border between the eastern and western sectors of Berlin to thwart its inhabitants' attempts to escape to the West, and construction of the Berlin Wall is started.
September 16 » The United States National Hurricane Research Project drops eight cylinders of silver iodide into the eyewall of Hurricane Esther. Wind speed reduces by 10%, giving rise to Project Stormfury.
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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