February 23 » Émile Zola is imprisoned in France after writing J'Accuse…!, a letter accusing the French government of antisemitism and wrongfully imprisoning Captain Alfred Dreyfus.
May 1 » Spanish–American War: Battle of Manila Bay: The Asiatic Squadron of the United States Navy destroys the Pacific Squadron of the Spanish Navy after a seven-hour battle. Spain loses all seven of its ships, and 381 Spanish sailors die. There are no American vessel losses or combat deaths.
June 10 » Spanish–American War: In the Battle of Guantánamo Bay, U.S. Marines begin the American invasion of Spanish-held Cuba.
June 27 » The first solo circumnavigation of the globe is completed by Joshua Slocum from Briar Island, Nova Scotia.
September 2 » Battle of Omdurman: British and Egyptian troops defeat Sudanese tribesmen and establish British dominance in Sudan.
September 13 » Hannibal Goodwin patents celluloid photographic film.
Day of marriage August 20, 1931
The temperature on August 20, 1931 was between 12.5 °C and 20.1 °C and averaged 15.7 °C. There was 10.1 hours of sunshine (70%). The average windspeed was 5 Bft (very strong wind) and was prevailing from the south-southwest. Source: KNMI
In The Netherlands , there was from August 10, 1929 to May 26, 1933 the cabinet Ruys de Beerenbrouck III, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
January 21 » Sir Isaac Isaacs is sworn in as the first Australian-born Governor-General of Australia.
March 3 » The United States adopts The Star-Spangled Banner as its national anthem.
March 19 » Gambling is legalized in Nevada.
May 1 » The Empire State Building is dedicated in New York City.
October 1 » The George Washington Bridge in the United States, linking New Jersey and New York, is opened.
December 11 » Statute of Westminster 1931: The British Parliament establishes legislative equality between the UK and the Dominions of the Commonwealth—Australia, Canada, Newfoundland, New Zealand, South Africa, and Ireland.
Day of death January 12, 1966
The temperature on January 12, 1966 was between -5.0 °C and -0.7 °C and averaged -2.4 °C. There was 0.2 hours of sunshine (2%). The partly or heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
July 10 » The Chicago Freedom Movement, led by Martin Luther King, Jr., holds a rally at Soldier Field in Chicago. As many as 60,000 people attend.
August 1 » Purges of intellectuals and imperialists becomes official China policy at the beginning of the Cultural Revolution.
August 10 » The Heron Road Bridge collapses while being built, killing nine workers in the deadliest construction accident in both Ottawa and Ontario.
August 16 » Vietnam War: The House Un-American Activities Committee begins investigations of Americans who have aided the Viet Cong. The committee intends to introduce legislation making these activities illegal. Anti-war demonstrators disrupt the meeting and 50 people are arrested.
September 8 » The landmark American science fiction television series Star Trek premieres with its first-aired episode, "The Man Trap".
November 30 » Barbados becomes independent from the United Kingdom.
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/I79472.php : accessed February 9, 2026), "Pieter Koopmans (1898-1966)".
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