January 2 » American statesman and diplomat John Hay announces the Open Door Policy to promote trade with China.
February 23 » Second Boer War: During the Battle of the Tugela Heights, the first British attempt to take Hart's Hill fails.
March 7 » The German liner SSKaiser Wilhelm der Grosse becomes the first ship to send wireless signals to shore.
May 23 » American Civil War: Sergeant William Harvey Carney is awarded the Medal of Honor for his heroism in the Assault on the Battery Wagner in 1863.
July 19 » The first line of the Paris Métro opens for operation.
December 14 » Quantum mechanics: Max Planck presents a theoretical derivation of his black-body radiation law.
Day of marriage November 17, 1926
The temperature on November 17, 1926 was between 7.3 °C and 12.5 °C and averaged 9.9 °C. There was 3.2 mm of rain. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south. Source: KNMI
March 16 » History of Rocketry: Robert Goddard launches the first liquid-fueled rocket, at Auburn, Massachusetts.
April 24 » The Treaty of Berlin is signed. Germany and the Soviet Union each pledge neutrality in the event of an attack on the other by a third party for the next five years.
May 12 » The Italian-built airship Norge becomes the first vessel to fly over the North Pole.
June 14 » Brazil leaves the League of Nations.
June 28 » Mercedes-Benz is formed by Gottlieb Daimler and Karl Benz merging their two companies.
August 6 » In New York City, the Warner Bros.' Vitaphone system premieres with the movie Don Juan starring John Barrymore.
When copying data from this family tree, please include a reference to the origin: Martin Groot, "Family tree Woltjer", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-woltjer/I4.php : accessed January 8, 2026), "Grietje Bakker (1900-± 1970)".
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