April 18 » The Greco-Turkish War is declared between Greece and the Ottoman Empire.
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.
June 16 » A treaty annexing the Republic of Hawaii to the United States is signed; the Republic would not be dissolved until a year later.
July 11 » Salomon August Andrée leaves Spitsbergen to attempt to reach the North Pole by balloon. He later crashes and dies.
July 26 » Anglo-Afghan War: The Pashtun fakir Saidullah leads an army of more than 10,000 to begin a siege of the British garrison in the Malakand Agency of the North West Frontier Province of India.
August 21 » Oldsmobile, an American automobile manufacturer and marque, is founded.
Day of marriage May 14, 1921
The temperature on May 14, 1921 was between 8.6 °C and 25.8 °C and averaged 16.8 °C. There was 10.5 hours of sunshine (67%). The average windspeed was 2 Bft (weak wind) 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.
February 15 » Kingdom of Romania establishes its legation in Helsinki.
March 24 » The 1921 Women's Olympiad begins in Monte Carlo, first international women's sports event.
July 22 » Rif War: The Spanish Army suffers its worst military defeat in modern times to the Berbers of the Rif region of Spanish Morocco.
July 27 » Researchers at the University of Toronto, led by biochemist Frederick Banting, prove that the hormone insulin regulates blood sugar.
October 19 » The Portuguese Prime Minister and several officials are murdered in the Bloody Night coup.
October 29 » The Link River Dam, a part of the Klamath Reclamation Project, is completed.
Day of death December 9, 1967
The temperature on December 9, 1967 was between -1.7 °C and 1.7 °C and averaged 0.1 °C. There was 6.4 mm of rain during 3.1 hours. There was 2.2 hours of sunshine (28%). The heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
April 23 » Soviet space program: Soyuz 1 (Russian: Союз 1, Union 1) a manned spaceflight carrying cosmonaut Colonel Vladimir Komarov is launched into orbit.
May 17 » Six-Day War: President Gamal Abdel Nasser of Egypt demands dismantling of the peace-keeping UN Emergency Force in Egypt.
June 2 » Protests in West Berlin against the arrival of the Shah of Iran turn into riots, during which Benno Ohnesorg is killed by a police officer. His death results in the founding of the terrorist group Movement 2 June.
June 8 » Six-Day War: The USS Liberty incident occurs, killing 34 and wounding 171.
October 10 » The Outer Space Treaty comes into force.
October 27 » Catholic priest Philip Berrigan and others of the 'Baltimore Four' protest the Vietnam War by pouring blood on Selective Service records.
When copying data from this family tree, please include a reference to the origin: Jan Ploegman, "Genealogy Nieboer ", database, Genealogy Online (https://www.genealogieonline.nl/genealogie-nieboer/I7326.php : accessed May 25, 2024), "Jan Nieboer (1897-1967)".
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