January 18 » An X-ray generating machine is exhibited for the first time by H. L. Smith.
June 2 » Guglielmo Marconi applies for a patent for his wireless telegraph.
June 28 » An explosion in the Newton Coal Company's Twin Shaft Mine in Pittston, Pennsylvania results in a massive cave-in that kills 58 miners.
August 16 » Skookum Jim Mason, George Carmack and Dawson Charlie discover gold in a tributary of the Klondike River in Canada, setting off the Klondike Gold Rush.
November 17 » The Western Pennsylvania Hockey League, which later became the first ice hockey league to openly trade and hire players, began play at Pittsburgh's Schenley Park Casino.
December 17 » Pittsburgh, Pennsylvania's Schenley Park Casino, which was the first multi-purpose arena with the technology to create an artificial ice surface in North America, is destroyed in a fire.
Day of marriage May 12, 1921
The temperature on May 12, 1921 was between 9.2 °C and 21.1 °C and averaged 15.5 °C. There was 9.1 hours of sunshine (59%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-southeast. 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 20 » The British K-class submarine HMS K5 sinks in the English Channel; all 56 on board die.
February 27 » The International Working Union of Socialist Parties is founded in Vienna.
March 20 » The Upper Silesia plebiscite was a plebiscite mandated by the Versailles Treaty to determine a section of the border between Weimar Germany and Poland.
April 2 » The Autonomous Government of Khorasan, a military government encompassing the modern state of Iran, is established.
October 5 » The World Series is the first to be broadcast on radio.
October 21 » President Warren G. Harding delivers the first speech by a sitting U.S. President against lynching in the deep South.
Day of death October 1, 1954
The temperature on October 1, 1954 was between 9.2 °C and 15.2 °C and averaged 13.0 °C. There was 1.0 mm of rain during 1.2 hours. There was -0.1 hours of sunshine (0%). The heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
February 23 » The first mass inoculation of children against polio with the Salk vaccine begins in Pittsburgh.
February 28 » The first color television sets using the NTSC standard are offered for sale to the general public.
May 13 » The original Broadway production of The Pajama Game opens and runs for another 1,063 performances. Later received three Tony Awards for Best Musical, Best Performance by a Featured Actress in a Musical, and Best Choreography.
August 16 » The first issue of Sports Illustrated is published.
September 26 » The Japanese rail ferry Tōya Maru sinks during a typhoon in the Tsugaru Strait, Japan, killing 1,172.
December 23 » First successful kidney transplant is performed by J. Hartwell Harrison and Joseph Murray.
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/I184030.php : accessed October 15, 2026), "Jacoba Gerritdina Weening (1896-1954)".
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