The temperature on August 23, 1915 was between 6.4 °C and 19.2 °C and averaged 13.2 °C. There was 0.1 mm of rain. There was 4.3 hours of sunshine (30%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
In The Netherlands , there was from August 29, 1913 to September 9, 1918 the cabinet Cort van der Linden, with Mr. P.W.A. Cort van der Linden (liberaal) as prime minister.
January 21 » Kiwanis International is founded in Detroit.
February 22 » World War I: The Imperial German Navy institutes unrestricted submarine warfare.
April 18 » French pilot Roland Garros is shot down and glides to a landing on the German side of the lines during World War I.
June 21 » The U.S. Supreme Court hands down its decision in Guinn v. United States 238 US 347 1915, striking down Oklahoma grandfather clause legislation which had the effect of denying the right to vote to blacks.
July 16 » Henry James becomes a British citizen to highlight his commitment to Britain during the first World War.
July 25 » RFC Captain Lanoe Hawker becomes the first British pursuit aviator to earn the Victoria Cross.
Day of marriage May 7, 1937
The temperature on May 7, 1937 was between 5.0 °C and 12.2 °C and averaged 9.8 °C. There was 1.5 mm of rain during 0.7 hours. There was 0.1 hours of sunshine (1%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-northwest. Source: KNMI
March 2 » The Steel Workers Organizing Committee signs a collective bargaining agreement with U.S. Steel, leading to unionization of the United States steel industry.
April 1 » Aden becomes a British crown colony.
April 9 » The Kamikaze arrives at Croydon Airport in London. It is the first Japanese-built aircraft to fly to Europe.
April 12 » Sir Frank Whittle ground-tests the first jet engine designed to power an aircraft, at Rugby, England.
May 21 » A Soviet station, North Pole-1, becomes the first scientific research settlement to operate on the drift ice of the Arctic Ocean.
August 1 » Josip Broz Tito reads the resolution "Manifesto of constitutional congress of KPH" to the constitutive congress of KPH (Croatian Communist Party) in woods near Samobor.
Day of death October 16, 1971
The temperature on October 16, 1971 was between 2.2 °C and 10.6 °C and averaged 5.9 °C. There was 2.7 hours of sunshine (25%). The partly or heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-southeast. Source: KNMI
January 31 » Apollo program: Apollo 14: Astronauts Alan Shepard, Stuart Roosa, and Edgar Mitchell, aboard a Saturn V, lift off for a mission to the Fra Mauro Highlands on the Moon.
February 9 » The 6.5–6.7 Mw Sylmar earthquake hits the Greater Los Angeles Area with a maximum Mercalli intensity of XI (Extreme), killing 64 and injuring 2,000.
June 11 » The U.S. Government forcibly removes the last holdouts to the Native American Occupation of Alcatraz, ending 19 months of control.
July 5 » The Twenty-sixth Amendment to the United States Constitution, lowering the voting age from 21 to 18 years, is formally certified by President Richard Nixon.
September 11 » The Egyptian Constitution becomes official.
November 28 » Fred Quilt, a leader of the Tsilhqot'in First Nation suffers severe abdominal injuries allegedly caused by Royal Canadian Mounted Police officers; he dies two days later.
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/I445606.php : accessed February 18, 2026), "Siebrigje de Blaauw (1915-1971)".
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