April 30 » J. J. Thomson of the Cavendish Laboratory announces his discovery of the electron as a subatomic particle, over 1,800 times smaller than a proton (in the atomic nucleus), at a lecture at the Royal Institution in London.
June 16 » A treaty annexing the Republic of Hawaii to the United States is signed; the Republic would not be dissolved until a year later.
July 11 » Salomon August Andrée leaves Spitsbergen to attempt to reach the North Pole by balloon. He later crashes and dies.
August 2 » Anglo-Afghan War: The Siege of Malakand ends when a relief column is able to reach the British garrison in the Malakand states.
September 1 » The Tremont Street Subway in Boston opens, becoming the first underground rapid transit system in North America.
December 6 » London becomes the world's first city to host licensed taxicabs.
Day of marriage July 19, 1919
The temperature on July 19, 1919 was between 14.1 °C and 26.4 °C and averaged 19.2 °C. There was 23.6 mm of rain. There was 7.5 hours of sunshine (46%). The average windspeed was 2 Bft (weak wind) and was prevailing from the south. Source: KNMI
In The Netherlands , there was from September 9, 1918 to September 18, 1922 the cabinet Ruys de Beerenbrouck I, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
January 15 » Rosa Luxemburg and Karl Liebknecht, two of the most prominent socialists in Germany, are tortured and murdered by the Freikorps at the end of the Spartacist uprising.
January 18 » World War I: The Paris Peace Conference opens in Versailles, France.
February 5 » Charlie Chaplin, Mary Pickford, Douglas Fairbanks, and D. W. Griffith launch United Artists.
February 6 » The American Legion is founded.
June 21 » The Royal Canadian Mounted Police fire a volley into a crowd of unemployed war veterans, killing two, during the Winnipeg general strike.
December 1 » Lady Astor becomes the first female Member of Parliament to take her seat in the House of Commons of the United Kingdom. (She had been elected to that position on November 28.)
Day of death October 26, 1965
The average temperature on October 26, 1965 was 7.2 °C. There was 0.2 mm of rain. There was 7.9 hours of sunshine (79%). The average windspeed was 1 Bft (weak wind) and was prevailing from the south-southeast. Source: KNMI
February 15 » A new red-and-white maple leaf design is adopted as the flag of Canada, replacing the old Canadian Red Ensign banner.
April 4 » The first model of the new Saab Viggen fighter aircraft is unveiled.
April 11 » The Palm Sunday tornado outbreak of 1965: Fifty-one tornadoes hit in six Midwestern states, killing 256 people.
May 12 » The Soviet spacecraft Luna 5 crashes on the Moon.
May 18 » Israeli spy Eli Cohen is hanged in Damascus, Syria.
December 16 » Vietnam War: General William Westmoreland sends U.S. Secretary of Defense Robert McNamara a request for 243,000 more men by the end of 1966.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I70234.php : accessed October 19, 2026), "Grietje van der Werf (1897-1965)".
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