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.
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.
August 10 » German chemist Felix Hoffmann discovers an improved way of synthesizing acetylsalicylic acid (aspirin).
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.
Day of death October 18, 1980
The temperature on October 18, 1980 was between 5.4 °C and 12.2 °C and averaged 8.8 °C. There was 2.7 mm of rain during 1.8 hours. There was 3.7 hours of sunshine (35%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) 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.
February 24 » The United States Olympic hockey team completes its Miracle on Ice by defeating Finland 4–2 to win the gold medal.
May 17 » General Chun Doo-hwan of South Korea seizes control of the government and declares martial law in order to suppress student demonstrations.
May 18 » Students in Gwangju, South Korea begin demonstrations calling for democratic reforms.
July 5 » Swedish tennis player Björn Borg wins his fifth Wimbledon final and becomes the first male tennis player to win the championships five times in a row (1976–1980).
September 5 » The Gotthard Road Tunnel opens in Switzerland as the world's longest highway tunnel at 10.14 miles (16.32km) stretching from Göschenen to Airolo.
November 28 » Iran–Iraq War: Operation Morvarid: The bulk of the Iraqi Navy is destroyed by the Iranian Navy in the Persian Gulf. (Commemorated in Iran as Navy Day.)
When copying data from this family tree, please include a reference to the origin: Gerrit Jan Georg, "Family tree Georg en Kiel", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-georg/I3395.php : accessed February 23, 2026), "Herman Gerhardus Boswijk (1897-1980)".
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