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.
August 21 » Oldsmobile, an American automobile manufacturer and marque, is founded.
August 31 » Thomas Edison patents the Kinetoscope, the first movie projector.
September 1 » The Tremont Street Subway in Boston opens, becoming the first underground rapid transit system in North America.
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.
Day of death May 20, 1924
The temperature on May 20, 1924 was between 13.5 °C and 20.8 °C and averaged 17.0 °C. There was 0.7 mm of rain. There was 3.7 hours of sunshine (23%). The average windspeed was 2 Bft (weak wind) and was prevailing from the south. Source: KNMI
In The Netherlands , there was from September 19, 1922 to August 4, 1925 the cabinet Ruys de Beerenbrouck II, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
February 1 » Russia–United Kingdom relations are restored, over six years after the Communist revolution.
February 14 » The Computing-Tabulating-Recording Company changes its name to International Business Machines Corporation (IBM).
April 15 » Rand McNally publishes its first road atlas.
September 17 » The Border Protection Corps is established in the Second Polish Republic for the defence of the eastern border against armed Soviet raids and local bandits.
November 23 » Edwin Hubble's discovery, that the Andromeda "nebula" is actually another island galaxy far outside of our own Milky Way, is first published in The New York Times.
December 20 » Adolf Hitler is released from Landsberg Prison.
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/I75759.php : accessed October 6, 2026), "Maaike Postma (1897-1924)".
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