January 12 » The National Trust is founded in the United Kingdom.
February 1 » Fountains Valley, Pretoria, the oldest nature reserve in Africa, is proclaimed by President Paul Kruger.
April 6 » Oscar Wilde is arrested in the Cadogan Hotel, London, after losing a libel case against the Marquess of Queensberry.
June 28 » The United States Court of Private Land Claims rules James Reavis’s claim to Barony of Arizona is "wholly fictitious and fraudulent."
August 31 » German Count Ferdinand von Zeppelin patents his navigable balloon.
October 8 » Korean Empress Myeongseong is assassinated by Japanese infiltrators.
Day of marriage May 10, 1917
The temperature on May 10, 1917 was between 3.5 °C and 20.4 °C and averaged 13.6 °C. There was 9.8 hours of sunshine (64%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-southeast. 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 17 » The United States pays Denmark $25 million for the Virgin Islands.
February 3 » First World War: The American entry into World War I begins when diplomatic relations with Germany are severed due to its unrestricted submarine warfare.
March 1 » The Zimmermann Telegram is reprinted in newspapers across the United States after the U.S. government releases its unencrypted text.
April 12 » World War I: Canadian forces successfully complete the taking of Vimy Ridge from the Germans.
May 13 » Three children report the first apparition of Our Lady of Fátima in Fátima, Portugal.
July 17 » King George V issues a Proclamation stating that the male line descendants of the British Royal Family will bear the surname Windsor.
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/I342182.php : accessed March 17, 2026), "Geertina Barteldina Betten (1895-????)".
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