The temperature on January 21, 1920 was between 3.2 °C and 7.8 °C and averaged 4.9 °C. There was 5.0 mm of rain. There was 0.5 hours of sunshine (6%). The average windspeed was 5 Bft (very strong wind) and was prevailing from the west-northwest. 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.
March 28 » Palm Sunday tornado outbreak of 1920 affects the Great Lakes region and Deep South states.
April 25 » At the San Remo conference, the principal Allied Powers of World War I adopt a resolution to determine the allocation of Class "A" League of Nations mandates for administration of the former Ottoman-ruled lands of the Middle East.
August 16 » Ray Chapman of the Cleveland Indians is hit on the head by a fastball thrown by Carl Mays of the New York Yankees, and dies early the next day. Chapman was the second player to die from injuries sustained in a Major League Baseball game, the first being Doc Powers in 1909.
September 7 » Two newly purchased Savoia flying boats crash in the Swiss Alps en route to Finland where they would serve with the Finnish Air Force, killing both crews.
November 15 » The Free City of Danzig is established.
December 19 » King Constantine I is restored as King of the Hellenes after the death of his son Alexander of Greece and a plebiscite.
Day of marriage March 20, 1941
The temperature on March 20, 1941 was between -0.6 °C and 8.4 °C and averaged 3.8 °C. There was 1.4 hours of sunshine (12%). The average windspeed was 2 Bft (weak wind) and was prevailing from the west-northwest. Source: KNMI
In The Netherlands , there was from September 3, 1940 to July 27, 1941 the cabinet Gerbrandy I, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
In The Netherlands , there was from July 27, 1941 to February 23, 1945 the cabinet Gerbrandy II, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
April 27 » World War II: The Communist Party of Slovenia, the Slovene Christian Socialists, the left-wing Slovene Sokols (also known as "National Democrats") and a group of progressive intellectuals establish the Liberation Front of the Slovene Nation.
October 8 » World War II: During the preliminaries of the Battle of Rostov, German forces reach the Sea of Azov with the capture of Mariupol.
November 13 » World War II: The aircraft carrier HMSArk Royal is torpedoed by U-81, sinking the following day.
November 25 » HMSBarham is sunk by a German torpedo during World War II.
December 19 » World War II: Adolf Hitler appoints himself as head of the Oberkommando des Heeres.
December 19 » World War II: Limpet mines placed by Italian divers heavily damage HMSValiant and HMSQueen Elizabeth in Alexandria harbour.
Day of death March 30, 1968
The temperature on March 30, 1968 was between 4.0 °C and 19.5 °C and averaged 10.0 °C. There was 0.4 mm of rain during 0.7 hours. There was 8.7 hours of sunshine (68%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the north-northwest. Source: KNMI
May 26 » H-dagurinn in Iceland: Traffic changes from driving on the left to driving on the right overnight
September 30 » The Boeing 747 is rolled out and shown to the public for the first time.
October 14 » The first live TV broadcast by American astronauts in orbit is performed by the Apollo 7 crew.
November 8 » The Vienna Convention on Road Traffic is signed to facilitate international road traffic and to increase road safety by standardising the uniform traffic rules among the signatories.
December 9 » Douglas Engelbart gave what became known as "The Mother of All Demos", publicly debuting the computer mouse, hypertext, and the bit-mapped graphical user interface using the oN-Line System (NLS).
December 26 » The Communist Party of the Philippines is established by Jose Maria Sison, breaking away from the Partido Komunista ng Pilipinas-1930.
When copying data from this family tree, please include a reference to the origin: Tjitze Koster, "Family tree Koster Twijslerheide e.o.", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-koster/I3207.php : accessed March 15, 2026), "Gjalt Gjaltema (1920-1968)".
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