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 2 » British-Italian engineer Guglielmo Marconi obtains a patent for radio in London.
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 10 » German chemist Felix Hoffmann discovers an improved way of synthesizing acetylsalicylic acid (aspirin).
September 12 » Tirah Campaign: In the Battle of Saragarhi, ten thousand Pashtun tribesmen suffer several hundred casualties while attacking 21 Sikh soldiers in British service.
Day of marriage January 29, 1920
The temperature on January 29, 1920 was between 3.8 °C and 8.5 °C and averaged 6.0 °C. There was 1.7 mm of rain. There was 3.7 hours of sunshine (42%). The average windspeed was 5 Bft (very strong wind) and was prevailing from the southwest. 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.
July 20 » The Greek Army takes control of Silivri after Greece is awarded the city by the Paris Peace Conference; by 1923 Greece effectively lost control to the Turks.
September 16 » The Wall Street bombing: A bomb in a horse wagon explodes in front of the J. P. Morgan building in New York City killing 38 and injuring 400.
October 30 » The Communist Party of Australia is founded in Sydney.
November 28 » FIDAC (The Interallied Federation of War Veterans Organisations), the first international organization of war veterans is established in Paris, France
December 22 » The GOELRO economic development plan is adopted by the 8th Congress of Soviets of the Russian SFSR.
Day of death January 28, 1978
The temperature on January 28, 1978 was between 2.9 °C and 6.8 °C and averaged 4.7 °C. There was 0.4 mm of rain during 0.6 hours. There was 0.5 hours of sunshine (6%). The heavily clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south-southeast. 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 9 » The Budd Company unveils its first SPV-2000 self-propelled railcar in Philadelphia, Pennsylvania.
March 22 » Karl Wallenda of The Flying Wallendas dies after falling off a tight-rope suspended between two hotels in San Juan, Puerto Rico.
May 1 » Japan's Naomi Uemura, travelling by dog sled, becomes the first person to reach the North Pole alone.
July 10 » President Moktar Ould Daddah of Mauritania is ousted in a bloodless coup d'état.
September 5 » Camp David Accords: Menachem Begin and Anwar Sadat begin peace discussions at Camp David, Maryland.
October 21 » Australian civilian pilot Frederick Valentich vanishes over the Bass Strait south of Melbourne, after reporting contact with an unidentified aircraft.
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/I75109.php : accessed October 7, 2026), "Roelina Postma (1897-1978)".
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