April 30 » J. J. Thomson of the Cavendish Laboratory announces his discovery of the electron as a subatomic particle, over 1,800 times smaller than a proton (in the atomic nucleus), at a lecture at the Royal Institution in London.
August 2 » Anglo-Afghan War: The Siege of Malakand ends when a relief column is able to reach the British garrison in the Malakand states.
September 10 » Lattimer massacre: A sheriff's posse kills 19 unarmed striking immigrant miners in Lattimer, Pennsylvania, United States.
September 11 » After months of pursuit, generals of Menelik II of Ethiopia capture Gaki Sherocho, the last king of Kaffa, bringing an end to that ancient kingdom.
December 9 » Activist Marguerite Durand founds the feminist daily newspaper La Fronde in Paris.
December 30 » The British Colony of Natal annexes Zululand.
Day of marriage April 15, 1920
The temperature on April 15, 1920 was between 8.6 °C and 18.0 °C and averaged 12.6 °C. There was 0.7 mm of rain. There was 4.2 hours of sunshine (30%). The average windspeed was 5 Bft (very strong wind) 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 16 » Zeta Phi Beta Sorority Incorporated was founded on the campus of Howard University.
January 23 » The Netherlands refuses to surrender the exiled Kaiser Wilhelm II of Germany to the Allies.
February 10 » About 75% of the population in Zone I votes to join Denmark in the 1920 Schleswig plebiscites.
April 28 » Azerbaijan is added to the Soviet Union.
May 5 » Authorities arrest Nicola Sacco and Bartolomeo Vanzetti for alleged robbery and murder.
July 11 » In the East Prussian plebiscite the local populace decides to remain with Weimar Germany.
Day of death March 13, 1989
The temperature on March 13, 1989 was between 6.0 °C and 11.0 °C and averaged 8.5 °C. There was 0.5 mm of rain during 2.6 hours. There was 0.6 hours of sunshine (5%). The partly or heavily clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
In The Netherlands , there was from Tuesday, November 4, 1986 to Tuesday, November 7, 1989 the cabinet Lubbers II, with Drs. R.F.M. Lubbers (CDA) as prime minister.
In The Netherlands , there was from Tuesday, November 7, 1989 to Monday, August 22, 1994 the cabinet Lubbers III, with Drs. R.F.M. Lubbers (CDA) as prime minister.
February 19 » Flying Tiger Line flight 66 crashes into a hill near Sultan Abdul Aziz Shah Airport in Malaysia, killing four.
April 19 » A gun turret explodes on the USSIowa, killing 47 sailors.
September 14 » The Standard Gravure shooting where Joseph T. Wesbecker, a 47-year old pressman, killed 8 people and injured 12 people at his former workplace, Standard Gravure, before committing suicide.
September 19 » A bomb destroys UTA Flight 772 in mid-air above the Tùnùrù Desert, Niger, killing all 170 passengers and crew.
October 26 » China Airlines Flight 204 crashes after take off from Hualien Airport in Taiwan, killing all 54 people on board.
November 9 » Cold War: Fall of the Berlin Wall: East Germany opens checkpoints in the Berlin Wall, allowing its citizens to travel to West Berlin.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I1759.php : accessed October 1, 2026), "Vogeltje Koopmans (1897-1989)".
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