January 30 » The first Anglo-Japanese Alliance is signed in London.
February 27 » Second Boer War: Australian soldiers Harry "Breaker" Morant and Peter Handcock are executed in Pretoria after being convicted of war crimes.
April 2 » "Electric Theatre", the first full-time movie theater in the United States, opens in Los Angeles.
July 17 » Willis Carrier creates the first air conditioner in Buffalo, New York.
August 9 » Edward VII and Alexandra of Denmark are crowned King and Queen of the United Kingdom of Great Britain and Ireland.
December 10 » The opening of the reservoir of the Aswan Dam in Egypt.
Day of death April 4, 1920
The temperature on April 4, 1920 was between 3.7 °C and 12.1 °C and averaged 7.4 °C. There was 2.9 mm of rain. There was 2.2 hours of sunshine (17%). The average windspeed was 2 Bft (weak wind) and was prevailing from the south east. 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.
January 10 » League of Nations Covenant enters into force. On January 16 the organization holds its first council meeting, in Paris.
February 20 » An earthquake kills between 114 and 130 in Georgia and heavily damages the town of Gori.
May 7 » Kiev Offensive: Polish troops led by Józef Piłsudski and Edward Rydz-Śmigły and assisted by a symbolic Ukrainian force capture Kiev only to be driven out by the Red Army counter-offensive a month later.
August 20 » The National Football League is organized as the American Professional Football Conference in Canton, Ohio
August 26 » The 19th amendment to United States Constitution takes effect, giving women the right to vote.
November 12 » Italy and the Kingdom of Serbs, Croats and Slovenes sign the Treaty of Rapallo.
When copying data from this family tree, please include a reference to the origin: Gert Jonker, "Family tree Jonker", database, Genealogy Online (https://www.genealogieonline.nl/jonker_stamboom/I6329.php : accessed February 5, 2026), "Johan Haitsma (1902-1920)".
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