January 1 » Nigeria becomes a British protectorate.
March 2 » United States Steel Corporation is founded as a result of a merger between Carnegie Steel Company and Federal Steel Company which became the first corporation in the world with a market capital over $1 billion.
May 9 » Australia opens its first national parliament in Melbourne.
July 24 » O. Henry is released from prison in Columbus, Ohio, after serving three years for embezzlement from a bank.
August 14 » The first claimed powered flight, by Gustave Whitehead in his Number 21.
November 1 » Sigma Phi Epsilon, the largest national male collegiate fraternity, is established at Richmond College, in Richmond, Virginia.
Day of marriage March 18, 1921
The temperature on March 18, 1921 was between 2.4 °C and 10.6 °C and averaged 6.4 °C. There was 0.2 mm of rain. There was 3.6 hours of sunshine (30%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the southwest. 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 6 » Portuguese Communist Party is founded as the Portuguese Section of the Communist International.
March 31 » The Royal Australian Air Force is formed.
May 31 » The Tulsa race massacre kills at least 39, but other estimates of black fatalities vary from 55 to about 300.
July 29 » Adolf Hitler becomes leader of the National Socialist German Workers Party.
October 5 » The World Series is the first to be broadcast on radio.
November 4 » The Saalschutz Abteilung (hall defense detachment) of the Nazi Party is renamed the Sturmabteilung (storm detachment) after a large riot in Munich.
When copying data from this family tree, please include a reference to the origin: Joop Klavers, "Family tree Klavers", database, Genealogy Online (https://www.genealogieonline.nl/stamboom_klavers/I20299.php : accessed March 6, 2026), "Grietje Jonkman (1901-)".
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