January 28 » The Carnegie Institution of Washington is founded in Washington, D.C. with a $10 million gift from Andrew Carnegie.
March 7 » Second Boer War: Boers, led by Koos de la Rey, inflict the biggest defeat upon the British since the beginning of the war, at Tweebosch.
April 18 » The 7.5 Mw Guatemala earthquake shakes Guatemala with a maximum Mercalli intensity of VIII (Severe), killing between 800–2,000.
April 20 » Pierre and Marie Curie refine radium chloride.
May 31 » Second Boer War: The Treaty of Vereeniging ends the war and ensures British control of South Africa.
August 22 » Theodore Roosevelt becomes the first President of the United States to make a public appearance in an automobile.
Day of marriage May 14, 1926
The temperature on May 14, 1926 was between 3.4 °C and 12.4 °C and averaged 8.4 °C. There was 0.3 mm of rain. There was 0.4 hours of sunshine (3%). The average windspeed was 2 Bft (weak wind) and was prevailing from the north-northeast. Source: KNMI
January 8 » Crown Prince Nguyễn Phúc Vĩnh Thuỵ ascends the throne to become the last monarch of Vietnam.
March 16 » History of Rocketry: Robert Goddard launches the first liquid-fueled rocket, at Auburn, Massachusetts.
May 18 » Evangelist Aimee Semple McPherson disappears in Venice, California.
June 14 » Brazil leaves the League of Nations.
August 6 » In New York City, the Warner Bros.' Vitaphone system premieres with the movie Don Juan starring John Barrymore.
October 14 » The children's book Winnie-the-Pooh, by A. A. Milne, is first published.
Day of death September 4, 1938
The temperature on September 4, 1938 was between 5.9 °C and 15.8 °C and averaged 11.1 °C. There was 6.9 mm of rain during 5.3 hours. There was 1.7 hours of sunshine (13%). The average windspeed was 2 Bft (weak wind) and was prevailing from the west-southwest. Source: KNMI
June 25 » Dr. Douglas Hyde is inaugurated as the first President of Ireland.
July 17 » Douglas Corrigan takes off from Brooklyn to fly the "wrong way" to Ireland and becomes known as "Wrong Way" Corrigan.
September 30 » The League of Nations unanimously outlaws "intentional bombings of civilian populations".
October 5 » In Nazi Germany, Jews' passports are invalidated.
November 9 » The Nazi German diplomat Ernst vom Rath dies from gunshot wounds by Herschel Grynszpan, an act which the Nazis used as an excuse to instigate the 1938 national pogrom, also known as Kristallnacht.
December 13 » The Holocaust: The Neuengamme concentration camp opens in the Bergedorf district of Hamburg, Germany.
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/I354555.php : accessed February 7, 2026), "Willem Oostra (1902-1938)".
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