January 1 » New York, New York annexes land from surrounding counties, creating the City of Greater New York. The four initial boroughs, Manhattan, Brooklyn, Queens, and The Bronx, are joined on January 25 by Staten Island to create the modern city of five boroughs.
April 20 » U.S. President William McKinley signed a joint resolution to Congress for declaration of war against Spain, beginning the Spanish–American War.
May 8 » The first games of the Italian football league system are played.
June 11 » The Hundred Days' Reform, a planned movement to reform social, political, and educational institutions in China, is started by the Guangxu Emperor, but is suspended by Empress Dowager Cixi after 104 days. (The failed reform led to the abolition of the Imperial examination in 1905.)
July 7 » US President William McKinley signs the Newlands Resolution annexing Hawaii as a territory of the United States.
August 25 » Seven hundred Greek civilians, 17 British guards and the British Consul of Crete are killed by a Turkish mob in Heraklion, Greece.
Day of marriage August 21, 1920
The temperature on August 21, 1920 was between 8.9 °C and 13.7 °C and averaged 10.9 °C. There was 15.4 mm of rain. There was 0.2 hours of sunshine (1%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west-southwest. 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.
February 2 » The Tartu Peace Treaty is signed between Estonia and Russia.
February 10 » Józef Haller de Hallenburg performs symbolic wedding of Poland to the sea, celebrating restitution of Polish access to open sea.
May 5 » Authorities arrest Nicola Sacco and Bartolomeo Vanzetti for alleged robbery and murder.
August 18 » The Nineteenth Amendment to the United States Constitution is ratified, guaranteeing women's suffrage.
September 7 » Two newly purchased Savoia flying boats crash in the Swiss Alps en route to Finland where they would serve with the Finnish Air Force, killing both crews.
December 24 » Gabriele D'Annunzio surrendered the Italian Regency of Carnaro in the city of Fiume to Italian armed forces.
When copying data from this family tree, please include a reference to the origin: Joop Klavers, "Family tree Klavers", database, Genealogy Online (https://www.genealogieonline.nl/stamboom_klavers/I97673.php : accessed January 31, 2026), "IJza de Jonge (1898-????)".
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