April 21 » Spanish–American War: The United States Navy begins a blockade of Cuban ports. When the U.S. Congress issued a declaration of war on April 25, it declared that a state of war had existed from this date.
April 22 » Spanish–American War: The USSNashville captures a Spanish merchant ship.
July 8 » The death of crime boss Soapy Smith, killed in the Shootout on Juneau Wharf, releases Skagway, Alaska from his iron grip.
August 24 » Count Muravyov, Foreign Minister of Russia presents a rescript that convoked the First Hague Peace Conference.
December 18 » Gaston de Chasseloup-Laubat sets the first officially recognized land speed record of 39.245mph (63.159km/h) in a Jeantaud electric car.
December 26 » Marie and Pierre Curie announce the isolation of radium.
Day of marriage June 30, 1921
The temperature on June 30, 1921 was between 10.4 °C and 16.2 °C and averaged 12.8 °C. There was 0.3 hours of sunshine (2%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northwest. 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.
March 1 » Following mass protests in Petrograd demanding greater freedom in the RSFSR, the Kronstadt rebellion began, with sailors and citizens taking up arms against the Bolsheviks.
March 15 » Talaat Pasha, former Grand Vizir of the Ottoman Empire and chief architect of the Armenian Genocide is assassinated in Berlin by a 23-year-old Armenian, Soghomon Tehlirian.
March 18 » The second Peace of Riga is signed between Poland and the Soviet Union.
March 24 » The 1921 Women's Olympiad begins in Monte Carlo, first international women's sports event.
June 28 » Serbian King Alexander I proclaims the new constitution of the Kingdom of Serbs, Croats and Slovenes, known thereafter as the Vidovdan Constitution.
October 21 » President Warren G. Harding delivers the first speech by a sitting U.S. President against lynching in the deep South.
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/I22993.php : accessed February 14, 2026), "Gerdina Rosenbrand (1898-????)".
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