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.
July 1 » Spanish–American War: The Battle of San Juan Hill is fought in Santiago de Cuba, Cuba.
July 7 » US President William McKinley signs the Newlands Resolution annexing Hawaii as a territory of the United States.
July 8 » The death of crime boss Soapy Smith, killed in the Shootout on Juneau Wharf, releases Skagway, Alaska from his iron grip.
August 28 » Caleb Bradham's beverage "Brad's Drink" is renamed "Pepsi-Cola".
November 5 » Negrese nationalists revolt against Spanish rule and establish the short-lived Republic of Negros.
Day of marriage May 9, 1921
The temperature on May 9, 1921 was between 6.2 °C and 18.5 °C and averaged 11.2 °C. There was 1.9 mm of rain. There was 6.8 hours of sunshine (44%). The average windspeed was 2 Bft (weak wind) and was prevailing from the south-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 27 » The International Working Union of Socialist Parties is founded in Vienna.
March 18 » The second Peace of Riga is signed between Poland and the Soviet Union.
March 20 » The Upper Silesia plebiscite was a plebiscite mandated by the Versailles Treaty to determine a section of the border between Weimar Germany and Poland.
October 21 » President Warren G. Harding delivers the first speech by a sitting U.S. President against lynching in the deep South.
November 4 » The Saalschutz Abteilung (hall defense detachment) of the Nazi Party is renamed the Sturmabteilung (storm detachment) after a large riot in Munich.
November 11 » The Tomb of the Unknowns is dedicated by US President Warren G. Harding at Arlington National Cemetery.
Day of death July 31, 1981
The temperature on July 31, 1981 was between 8.0 °C and 22.0 °C and averaged 16.8 °C. There was 6.1 mm of rain during 1.1 hours. There was 7.1 hours of sunshine (46%). The partly clouded was. The average windspeed was 1 Bft (weak wind) and was prevailing from the east. Source: KNMI
In The Netherlands , there was from Monday, December 19, 1977 to Friday, September 11, 1981 the cabinet Van Agt I, with Mr. A.A.M. van Agt (CDA/KVP) as prime minister.
In The Netherlands , there was from Friday, September 11, 1981 to Saturday, May 29, 1982 the cabinet Van Agt II, with Mr. A.A.M. van Agt (CDA) as prime minister.
January 28 » Ronald Reagan lifts remaining domestic petroleum price and allocation controls in the United States helping to end the 1979 energy crisis and begin the 1980s oil glut.
March 11 » Hundreds of students protest in the University of Pristina in Kosovo, then part of Yugoslavia, to give their province more political rights. The protests then became a nationwide movement.
May 12 » Francis Hughes, Provisional IRA hunger striker, dies in the Maze Prison, Northern Ireland.
June 11 » A magnitude 6.9 earthquake at Golbaf, Iran, kills at least 2,000.
August 24 » Mark David Chapman is sentenced to 20 years to life in prison for murdering John Lennon.
September 21 » Sandra Day O'Connor is unanimously approved by the U.S. Senate as the first female Supreme Court justice.
When copying data from this family tree, please include a reference to the origin: Van Knippenberg, "Family tree Van Knippenberg", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-knippenberg/I3940.php : accessed January 27, 2026), "Wilhelmina Petronella Elisabeth Hubertina van Hassel (1898-1981)".
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