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.
May 26 » The original manuscript of William Bradford's history, "Of Plymouth Plantation" is returned to the Governor of Massachusetts by the Bishop of London after being taken during the American Revolutionary War.
June 22 » British colonial officers Charles Walter Rand and Lt. Charles Egerton Ayerst are assassinated in Pune, Maharashtra, India by the Chapekar brothers and Mahadeo Vinayak Ranade, who are later caught and hanged.
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.
Day of marriage March 17, 1921
The temperature on March 17, 1921 was between 2.2 °C and 15.1 °C and averaged 8.5 °C. There was 4.3 hours of sunshine (36%). 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.
February 21 » Rezā Shāh takes control of Tehran during a successful coup.
March 1 » The Australian cricket team captained by Warwick Armstrong becomes the first team to complete a whitewash of The Ashes, something that would not be repeated for 86 years.
March 6 » Portuguese Communist Party is founded as the Portuguese Section of the Communist International.
July 23 » The Communist Party of China (CPC) is established at the founding National Congress.
August 14 » Tannu Uriankhai, later Tuvan People's Republic is established as a completely independent country (which is supported by Soviet Russia).
October 29 » United States: Second trial of Sacco and Vanzetti in Boston, Massachusetts.
Day of death July 16, 1979
The temperature on July 16, 1979 was between 9.3 °C and 17.0 °C and averaged 14.0 °C. There was 1.4 mm of rain during 5.0 hours. The heavily clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the west. Source: KNMI
In The Netherlands , there was from Monday, December 19, 1977 to Friday, September 11, 1981 the cabinet Van Agt I, with Mr. A.A.M. van Agt (CDA/KVP) as prime minister.
July 17 » Nicaraguan dictator General Anastasio Somoza Debayle resigns and flees to Miami, Florida, United States.
September 13 » South Africa grants independence to the "homeland" of Venda (not recognised outside South Africa).
October 17 » The Department of Education Organization Act creates the US Department of Education.
November 28 » Air New Zealand Flight 901, a DC-10 sightseeing flight over Antarctica, crashes into Mount Erebus, killing all 257 people on board.
December 12 » The 8.2 Mw Tumaco earthquake shakes Colombia and Ecuador with a maximum Mercalli intensity of IX (Violent), killing 300–600, and generating a large tsunami.
December 23 » Soviet–Afghan War: Soviet Union forces occupy Kabul, the Afghan capital.
When copying data from this family tree, please include a reference to the origin: Tijs van den Brink, "Parentele of Geurt Jacobs", database, Genealogy Online (https://www.genealogieonline.nl/geurt-jacobs/I31393.php : accessed January 20, 2026), "Elbert Slot (1897-1979)".
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