February 27 » King George I of Greece survives an assassination attempt.
April 25 » Spanish–American War: The United States declares war on Spain.
July 7 » US President William McKinley signs the Newlands Resolution annexing Hawaii as a territory of the United States.
August 13 » Carl Gustav Witt discovers 433 Eros, the first near-Earth asteroid to be found.
October 6 » Phi Mu Alpha Sinfonia, the largest American music fraternity, is founded at the New England Conservatory of Music.
October 18 » The United States takes possession of Puerto Rico from Spain.
Day of marriage May 31, 1919
The temperature on May 31, 1919 was between 8.2 °C and 23.0 °C and averaged 15.4 °C. There was 12.9 hours of sunshine (79%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northeast. 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 » March 1st Movement begins in Korea under Japanese rule.
April 10 » Mexican Revolution leader Emiliano Zapata is ambushed and shot dead by government forces in Morelos.
September 10 » Austria and the Allies sign the Treaty of Saint-Germain-en-Laye recognizing the independence of Poland, Hungary, Czechoslovakia and Yugoslavia.
September 22 » The steel strike of 1919, led by the Amalgamated Association of Iron and Steel Workers, begins in Pennsylvania before spreading across the United States.
October 16 » Adolf Hitler delivers his first public address at a meeting of the German Workers' Party.
November 11 » Latvian forces defeat the West Russian Volunteer Army at Riga in the Latvian War of Independence.
Day of death January 11, 1964
The temperature on January 11, 1964 was between -4.3 °C and -0.7 °C and averaged -3.0 °C. There was 0.2 mm of rain during 0.6 hours. The almost completely overcast was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-northeast. Source: KNMI
April 1 » The British Admiralty, War Office and Air Ministry are replaced by a unified Defence Council of the United Kingdom.
May 20 » Discovery of the cosmic microwave background radiation by Robert Woodrow Wilson and Arno Penzias.
July 2 » Civil rights movement: U.S. President Lyndon B. Johnson signs the Civil Rights Act of 1964 meant to prohibit segregation in public places.
August 1 » The former Belgian Congo is renamed the Democratic Republic of the Congo.
August 7 » Vietnam War: The U.S. Congress passes the Gulf of Tonkin Resolution giving U.S. President Lyndon B. Johnson broad war powers to deal with North Vietnamese attacks on American forces.
September 25 » The Mozambican War of Independence against Portugal begins.
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/I75842.php : accessed October 17, 2026), "Roelof Boersma (1898-1964)".
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