The temperature on May 1, 1921 was between 3.3 °C and 17.3 °C and averaged 10.7 °C. There was 13.1 hours of sunshine (88%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northeast. 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.
July 11 » A truce in the Irish War of Independence comes into effect.
September 11 » Nahalal, the first moshav in Palestine, is settled as part of a Zionist plan of creating a Jewish state, later to be Israel.
October 5 » The World Series is the first to be broadcast on radio.
October 13 » Soviet republics sign the Treaty of Kars to formalize the borders between Turkey and the South Caucasus states.
October 29 » United States: Second trial of Sacco and Vanzetti in Boston, Massachusetts.
November 11 » The Tomb of the Unknowns is dedicated by US President Warren G. Harding at Arlington National Cemetery.
Day of death May 1, 1947
The temperature on May 1, 1947 was between 4.7 °C and 10.1 °C and averaged 6.5 °C. There was 4.5 mm of rain during 6.3 hours. There was 1.5 hours of sunshine (10%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the north. Source: KNMI
January 25 » Thomas Goldsmith Jr. files a patent for a "Cathode Ray Tube Amusement Device", the first ever electronic game.
February 12 » The largest observed iron meteorite until that time creates an impact crater in Sikhote-Alin, in the Soviet Union.
April 15 » Jackie Robinson debuts for the Brooklyn Dodgers, breaking baseball's color line.
August 7 » The Bombay Municipal Corporation formally takes over the Bombay Electric Supply and Transport (BEST).
August 7 » Thor Heyerdahl's balsa wood raft, the Kon-Tiki, smashes into the reef at Raroia in the Tuamotu Islands after a 101-day, 7,000 kilometres (4,300mi) journey across the Pacific Ocean in an attempt to prove that pre-historic peoples could have traveled from South America.
November 18 » The Ballantyne's Department Store fire in Christchurch, New Zealand, kills 41; it is the worst fire disaster in the history of New Zealand.
When copying data from this family tree, please include a reference to the origin: W. Rovers, "Family tree Ro(o)vers", database, Genealogy Online (https://www.genealogieonline.nl/stamboom_rovers/I5224.php : accessed February 2, 2026), "Martinus Henricus van Duijnhoven (1921-1947)".
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