April 8 » In Pollock v. Farmers' Loan & Trust Co. the Supreme Court of the United States declares unapportioned income tax to be unconstitutional.
May 25 » Playwright, poet and novelist Oscar Wilde is convicted of "committing acts of gross indecency with other male persons" and sentenced to serve two years in prison.
June 20 » The Kiel Canal, crossing the base of the Jutland peninsula and the busiest artificial waterway in the world, is officially opened.
September 18 » The Atlanta Exposition Speech on race relations is delivered by Booker T. Washington.
October 21 » The Republic of Formosa collapses as Japanese forces invade.
November 8 » While experimenting with electricity, Wilhelm Röntgen discovers the X-ray.
Day of death April 3, 1921
The temperature on April 3, 1921 was between 4.6 °C and 20.8 °C and averaged 12.1 °C. There was 11.1 hours of sunshine (85%). The average windspeed was 2 Bft (weak wind) and was prevailing from the east-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.
February 12 » Bolsheviks launch a revolt in Georgia as a preliminary to the Red Army invasion of Georgia.
February 15 » Kingdom of Romania establishes its legation in Helsinki.
May 31 » The Tulsa race massacre kills at least 39, but other estimates of black fatalities vary from 55 to about 300.
July 10 » Belfast's Bloody Sunday: Sixteen people are killed and 161 houses destroyed during rioting and gun battles in Belfast, Northern Ireland.
August 3 » Major League Baseball Commissioner Kenesaw Mountain Landis confirms the ban of the eight Chicago Black Sox, the day after they were acquitted by a Chicago court.
October 5 » The World Series is the first to be broadcast on radio.
When copying data from this family tree, please include a reference to the origin: Louis Kramer, "Kramer Family Tree", database, Genealogy Online (https://www.genealogieonline.nl/kramer_stamboom/I517543.php : accessed December 25, 2025), "Geeske Postema (1895-1921)".
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