April 18 » The Greco-Turkish War is declared between Greece and the Ottoman Empire.
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).
August 21 » Oldsmobile, an American automobile manufacturer and marque, is founded.
December 6 » London becomes the world's first city to host licensed taxicabs.
Day of marriage May 17, 1923
The temperature on May 17, 1923 was between 3.0 °C and 10.3 °C and averaged 6.0 °C. There was 8.6 mm of rain. There was 5.4 hours of sunshine (34%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-southwest. 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.
January 9 » Juan de la Cierva makes the first autogyro flight.
March 20 » The Arts Club of Chicago hosts the opening of Pablo Picasso's first United States showing, entitled Original Drawings by Pablo Picasso, becoming an early proponent of modern art in the United States.
September 12 » Southern Rhodesia, today called Zimbabwe, is annexed by the United Kingdom.
September 29 » The French Mandate for Syria and the Lebanon takes effect.
November 11 » Adolf Hitler was arrested in Munich for high treason for his role in the Beer Hall Putsch.
December 21 » United Kingdom and Nepal formally signed an agreement of friendship, called the Nepal–Britain Treaty of 1923, which superseded the Treaty of Sugauli signed in 1816.
Day of death February 28, 1981
The average temperature on February 28, 1981 was 1.4 °C. There was 8.6 mm of rain during 7.7 hours. The heavily clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the east-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.
In The Netherlands , there was from Friday, September 11, 1981 to Saturday, May 29, 1982 the cabinet Van Agt II, with Mr. A.A.M. van Agt (CDA) as prime minister.
January 17 » President of the Philippines Ferdinand Marcos lifts martial law eight years and five months after declaring it.
February 13 » A series of sewer explosions destroys more than two miles of streets in Louisville, Kentucky.
June 24 » The Humber Bridge opens to traffic, connecting Yorkshire and Lincolnshire. It remained the world's longest bridge span for 17years.
August 25 » Voyager 2 spacecraft makes its closest approach to Saturn.
August 30 » President Mohammad-Ali Rajai and Prime Minister Mohammad-Javad Bahonar of Iran are assassinated in a bombing committed by the People's Mujahedin of Iran.
October 9 » President François Mitterrand abolishes capital punishment in France.
When copying data from this family tree, please include a reference to the origin: A.R. Hamstra, "Family tree Hamstra - Spanjer", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-hamstra-spanjer/R159.php : accessed October 24, 2026), "gerrit Hamstra (1897-1981)".
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