April 18 » The Greco-Turkish War is declared between Greece and the Ottoman Empire.
July 11 » Salomon August Andrée leaves Spitsbergen to attempt to reach the North Pole by balloon. He later crashes and dies.
August 10 » German chemist Felix Hoffmann discovers an improved way of synthesizing acetylsalicylic acid (aspirin).
August 21 » Oldsmobile, an American automobile manufacturer and marque, is founded.
August 31 » Thomas Edison patents the Kinetoscope, the first movie projector.
December 9 » Activist Marguerite Durand founds the feminist daily newspaper La Fronde in Paris.
Day of marriage August 9, 1921
The temperature on August 9, 1921 was between 6.3 °C and 20.7 °C and averaged 15.1 °C. There was 12.6 hours of sunshine (84%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-northwest. 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.
June 15 » Bessie Coleman earns her pilot's license, becoming the first female pilot of African-American descent.
June 28 » Serbian King Alexander I proclaims the new constitution of the Kingdom of Serbs, Croats and Slovenes, known thereafter as the Vidovdan Constitution.
July 11 » A truce in the Irish War of Independence comes into effect.
September 7 » The Legion of Mary, the largest apostolic organization of lay people in the Catholic Church, is founded in Dublin, Ireland.
October 29 » The Link River Dam, a part of the Klamath Reclamation Project, is completed.
November 4 » Japanese Prime Minister Hara Takashi is assassinated in Tokyo.
Day of death April 21, 1968
The temperature on April 21, 1968 was between 10.0 °C and 27.8 °C and averaged 18.8 °C. There was 0.1 mm of rain during 0.1 hours. There was 6.4 hours of sunshine (45%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the southwest. Source: KNMI
February 1 » The New York Central Railroad and the Pennsylvania Railroad are merged to form Penn Central Transportation.
April 4 » Apollo program: NASA launches Apollo 6.
August 21 » Cold War: Nicolae Ceaușescu, leader of Communist Romania, publicly condemns the Soviet-led Warsaw Pact invasion of Czechoslovakia, encouraging the Romanian population to arm itself against possible Soviet reprisals.
September 15 » The Soviet Zond 5 spaceship is launched, becoming the first spacecraft to fly around the Moon and re-enter the Earth's atmosphere.
October 26 » Soviet cosmonaut Georgy Beregovoy pilots Soyuz 3 into space for a four-day mission.
December 10 » Japan's biggest heist, the still-unsolved "300 million yen robbery", is carried out in Tokyo.
When copying data from this family tree, please include a reference to the origin: J. van Broekhoven, "Database Van Broekhoven", database, Genealogy Online (https://www.genealogieonline.nl/database-van-broekhoven/I328043.php : accessed January 22, 2026), "Elisabeth Johanna Levina Henriette Wijmans (1897-1968)".
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