February 23 » Cuba leases Guantánamo Bay to the United States "in perpetuity".
May 29 » In the May Coup, Alexander I, King of Serbia, and Queen Draga, are assassinated in Belgrade by the Black Hand (Crna Ruka) organization.
June 16 » Roald Amundsen leaves Oslo, Norway, to commence the first east–west navigation of the Northwest Passage.
July 1 » Start of first Tour de France bicycle race.
October 10 » The Women's Social and Political Union is founded in support of the enfranchisement of British women.
December 30 » A fire at the Iroquois Theater in Chicago, Illinois kills at least 605.
Day of death August 21, 1904
The temperature on August 21, 1904 was between 4.2 °C and 18.7 °C and averaged 12.3 °C. There was 9.9 hours of sunshine (69%). The average windspeed was 2 Bft (weak wind) and was prevailing from the north-northeast. Source: KNMI
February 9 » Russo-Japanese War: Battle of Port Arthur concludes.
April 5 » The first international rugby league match is played between England and an Other Nationalities team (Welsh and Scottish players) in Central Park, Wigan, England.
April 8 » Longacre Square in Midtown Manhattan is renamed Times Square after The New York Times.
May 9 » The steam locomotive City of Truro becomes the first steam engine in Europe to exceed 100mph (160km/h).
October 20 » Chile and Bolivia sign the Treaty of Peace and Friendship, delimiting the border between the two countries.
November 16 » English engineer John Ambrose Fleming receives a patent for the thermionic valve (vacuum tube).
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/I158284.php : accessed October 13, 2026), "Sieuwke de Jong (1903-1904)".
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