April 2 » Dmitry Sipyagin, Minister of Interior of the Russian Empire, is assassinated in the Marie Palace, Saint Petersburg.
April 20 » Pierre and Marie Curie refine radium chloride.
May 20 » Cuba gains independence from the United States. Tomás Estrada Palma becomes the country's first President.
August 9 » Edward VII and Alexandra of Denmark are crowned King and Queen of the United Kingdom of Great Britain and Ireland.
December 10 » The opening of the reservoir of the Aswan Dam in Egypt.
December 14 » The Commercial Pacific Cable Company lays the first Pacific telegraph cable, from San Francisco to Honolulu.
Day of marriage July 11, 1921
The temperature on July 11, 1921 was between 12.2 °C and 30.4 °C and averaged 21.4 °C. There was 14.0 hours of sunshine (85%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the 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 21 » The New Economic Policy is implemented by the Bolshevik Party in response to the economic failure as a result of war communism.
March 24 » The 1921 Women's Olympiad begins in Monte Carlo, first international women's sports event.
March 31 » The Royal Australian Air Force is formed.
May 31 » The Tulsa race massacre kills at least 39, but other estimates of black fatalities vary from 55 to about 300.
June 12 » Mikhail Tukhachevsky orders the use of chemical weapons against the Tambov Rebellion, bringing an end to the peasant uprising.
October 26 » The Chicago Theatre opens.
Day of death June 2, 1980
The temperature on June 2, 1980 was between 7.0 °C and 19.9 °C and averaged 13.7 °C. There was 14.0 hours of sunshine (85%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the west-northwest. 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.
January 26 » Egypt–Israel relations are formally established.
February 26 » Egypt and Israel establish full diplomatic relations.
February 28 » Andalusia approves its statute of autonomy through a referendum.
February 29 » Gordie Howe of the Hartford Whalers makes NHL history as he scores his 800th goal.
May 13 » An F3 tornado hits Kalamazoo County, Michigan. President Jimmy Carter declares it a federal disaster area.
July 5 » Swedish tennis player Björn Borg wins his fifth Wimbledon final and becomes the first male tennis player to win the championships five times in a row (1976–1980).
When copying data from this family tree, please include a reference to the origin: Hendrik Dreyer, "Dreyer Tree", database, Genealogy Online (https://www.genealogieonline.nl/dreyer-tree/I12514.php : accessed March 6, 2026), "Helena Alberta Dreyer (1902-1980)".
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