January 30 » The first Anglo-Japanese Alliance is signed in London.
April 20 » Pierre and Marie Curie refine radium chloride.
May 8 » In Martinique, Mount Pelée erupts, destroying the town of Saint-Pierre and killing over 30,000 people. Only a handful of residents survive the blast.
June 28 » The U.S. Congress passes the Spooner Act, authorizing President Theodore Roosevelt to acquire rights from Colombia for the Panama Canal.
August 22 » Theodore Roosevelt becomes the first President of the United States to make a public appearance in an automobile.
December 10 » The opening of the reservoir of the Aswan Dam in Egypt.
Day of marriage May 23, 1927
The temperature on May 23, 1927 was between 6.6 °C and 13.1 °C and averaged 9.3 °C. There was 2.8 hours of sunshine (17%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the northwest. Source: KNMI
February 23 » German theoretical physicist Werner Heisenberg writes a letter to fellow physicist Wolfgang Pauli, in which he describes his uncertainty principle for the first time.
April 30 » Douglas Fairbanks and Mary Pickford become the first celebrities to leave their footprints in concrete at Grauman's Chinese Theatre in Hollywood.
May 8 » Attempting to make the first non-stop transatlantic flight from Paris to New York, French war heroes Charles Nungesser and François Coli disappear after taking off aboard The White Bird biplane.
June 27 » Prime Minister of Japan Tanaka Giichi convenes an eleven-day conference to discuss Japan's strategy in China. The Tanaka Memorial, a forged plan for world domination, is later claimed to be a secret report leaked from this conference.
August 1 » The Nanchang Uprising marks the first significant battle in the Chinese Civil War between the Kuomintang and Chinese Communist Party. This day is commemorated as the anniversary of the founding of the People's Liberation Army.
December 30 » The Ginza Line, the first subway line in Asia, opens in Tokyo, Japan.
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/I136598.php : accessed October 15, 2026), "Jan Knoop (1902-)".
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