April 6 » In Athens, the opening of the first modern Olympic Games is celebrated, 1,500 years after the original games are banned by Roman emperor Theodosius I.
May 26 » Charles Dow publishes the first edition of the Dow Jones Industrial Average.
August 27 » Anglo-Zanzibar War: The shortest war in world history (09:02 to 09:40), between the United Kingdom and Zanzibar.
September 22 » Queen Victoria surpasses her grandfather King George III as the longest reigning monarch in British history.
November 27 » Also sprach Zarathustra by Richard Strauss is first performed.
December 10 » Alfred Jarry's Ubu Roi premieres in Paris. A riot breaks out at the end of the performance.
Day of marriage April 3, 1920
The temperature on April 3, 1920 was between 4.9 °C and 9.9 °C and averaged 7.2 °C. There was 1.2 hours of sunshine (9%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south. 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 7 » The New York State Assembly refuses to seat five duly elected Socialist assemblymen.
January 17 » Alcohol Prohibition begins in the United States as the Volstead Act goes into effect.
May 9 » Polish–Soviet War: The Polish army under General Edward Rydz-Śmigły celebrates its capture of Kiev with a victory parade on Khreshchatyk.
August 16 » Polish–Soviet War: The Battle of Radzymin concludes; the Soviet Red Army is forced to turn away from Warsaw.
November 7 » Patriarch Tikhon of Moscow issues a decree that leads to the formation of the Russian Orthodox Church Outside Russia.
November 21 » Irish War of Independence: In Dublin, 31 people are killed in what became known as "Bloody Sunday".
Day of death February 13, 1962
The temperature on February 13, 1962 was between 0.3 °C and 5.7 °C and averaged 2.6 °C. There was 6.9 mm of rain during 4.9 hours. There was 1.0 hours of sunshine (10%). The heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northwest. Source: KNMI
February 8 » Charonne massacre. Nine trade unionists are killed by French police at the instigation of Nazi collaborator Maurice Papon, then chief of the Paris Prefecture of Police.
May 19 » A birthday salute to U.S. President John F. Kennedy takes place at Madison Square Garden, New York City. The highlight is Marilyn Monroe's rendition of "Happy Birthday".
June 1 » Adolf Eichmann is hanged in Israel.
June 7 » The Organisation Armée Secrète (OAS) sets fire to the University of Algiers library building, destroying about 500,000 books.
September 6 » Archaeologist Peter Marsden discovers the first of the Blackfriars Ships dating back to the second century AD in the Blackfriars area of the banks of the River Thames in London.
October 14 » The Cuban Missile Crisis begins when an American reconnaissance aircraft takes photographs of Soviet ballistic missiles being installed in Cuba.
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/I55604.php : accessed February 26, 2026), "Johannes Gerhardus Poker (1896-1962)".
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