January 17 » The United States takes possession of Wake Island in the Pacific Ocean.
February 14 » Voting machines are approved by the U.S. Congress for use in federal elections.
March 4 » Cyclone Mahina sweeps in north of Cooktown, Queensland, with a 12 metres (39ft) wave that reaches up to 5 kilometres (3.1mi) inland, killing over 300.
March 6 » Bayer registers "Aspirin" as a trademark.
July 17 » NEC Corporation is organized as the first Japanese joint venture with foreign capital.
October 11 » The Second Boer War erupts in South Africa between the British-ruled Cape Colony, and the Boer-ruled Transvaal and Orange Free State.
Day of marriage April 5, 1923
The temperature on April 5, 1923 was between 0.7 °C and 14.3 °C and averaged 7.6 °C. There was 11.4 hours of sunshine (86%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the east. 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.
April 28 » Wembley Stadium is opened, named initially as the Empire Stadium.
May 26 » The first 24 Hours of Le Mans was held and has since been run annually in June.
September 4 » Maiden flight of the first U.S. airship, the USSShenandoah.
October 6 » The Turkish National Movement enters Constantinople.
October 16 » The Walt Disney Company is founded.
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» United Kingdom and Nepal formally signed an agreement of friendship, called the Nepal–Britain Treaty of 1923, which superseded the Treaty of Sugauli signed in 1816.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 March 1, 1968
The temperature on March 1, 1968 was between -1.2 °C and 6.0 °C and averaged 1.2 °C. There was 3.9 hours of sunshine (36%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east. Source: KNMI
February 1 » Canada's three military services, the Royal Canadian Navy, the Canadian Army and the Royal Canadian Air Force, are unified into the Canadian Forces.
March 7 » Vietnam War: The United States and South Vietnamese military begin Operation Truong Cong Dinh to root out Viet Cong forces from the area surrounding Mỹ Tho.
April 8 » BOAC Flight 712 catches fire shortly after takeoff. As a result of her actions in the accident, Barbara Jane Harrison is awarded a posthumous George Cross, the only GC awarded to a woman in peacetime.
September 6 » Swaziland becomes independent.
October 2 » Mexican President Gustavo Díaz Ordaz orders soldiers to suppress a demonstration of unarmed students, ten days before the start of the 1968 Summer Olympics.
October 5 » A Northern Ireland Civil Rights Association march in Derry is violently suppressed by police.
When copying data from this family tree, please include a reference to the origin: Joop Klavers, "Family tree Klavers", database, Genealogy Online (https://www.genealogieonline.nl/stamboom_klavers/I407776.php : accessed February 26, 2026), "Isaäk Poutsma (1899-1968)".
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