April 6 » In Athens, the opening of the first modern Olympic Games is celebrated, 1,500 years after the original games are banned by Roman emperor Theodosius I.
May 26 » Charles Dow publishes the first edition of the Dow Jones Industrial Average.
June 28 » An explosion in the Newton Coal Company's Twin Shaft Mine in Pittston, Pennsylvania results in a massive cave-in that kills 58 miners.
Day of marriage April 30, 1921
The temperature on April 30, 1921 was between 6.8 °C and 20.2 °C and averaged 13.7 °C. There was 12.0 hours of sunshine (81%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the 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.
February 12 » Bolsheviks launch a revolt in Georgia as a preliminary to the Red Army invasion of Georgia.
February 25 » Georgian capital Tbilisi falls to the invading Russian forces after heavy fighting and the Russians declare the Georgian Soviet Socialist Republic.
April 11 » Emir Abdullah establishes the first centralised government in the newly created British protectorate of Transjordan.
May 3 » The Government of Ireland Act 1920 is passed, dividing Ireland into Northern Ireland and Southern Ireland.
July 10 » Belfast's Bloody Sunday: Sixteen people are killed and 161 houses destroyed during rioting and gun battles in Belfast, Northern Ireland.
October 21 » President Warren G. Harding delivers the first speech by a sitting U.S. President against lynching in the deep South.
Day of death November 9, 1954
The temperature on November 9, 1954 was between 2.4 °C and 10.1 °C and averaged 7.1 °C. There was 2.6 mm of rain during 3.5 hours. There was 5.4 hours of sunshine (59%). The partly clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
January 2 » India establishes its highest civilian awards, the Bharat Ratna and the Padma Vibhushan.
February 23 » The first mass inoculation of children against polio with the Salk vaccine begins in Pittsburgh.
April 22 » Red Scare: Witnesses begin testifying and live television coverage of the Army–McCarthy hearings begins.
June 14 » U.S. President Dwight D. Eisenhower signs a bill into law that places the words "under God" into the United States Pledge of Allegiance.
September 11 » Hurricane Edna hits New England as a Category 2 hurricane, causing significant damage and 29 deaths.
December 4 » The first Burger King is opened in Miami, Florida.
Day of burial November 12, 1954
The temperature on November 12, 1954 was between 5.8 °C and 14.3 °C and averaged 11.0 °C. There was 4.0 mm of rain during 3.7 hours. The partly or heavily clouded was. The average windspeed was 5 Bft (very strong wind) and was prevailing from the southwest. Source: KNMI
February 15 » Canada and the United States agree to construct the Distant Early Warning Line, a system of radar stations in the far northern Arctic regions of Canada and Alaska.
March 1 » Nuclear weapons testing: The Castle Bravo, a 15-megaton hydrogen bomb, is detonated on Bikini Atoll in the Pacific Ocean, resulting in the worst radioactive contamination ever caused by the United States.
June 24 » First Indochina War: Battle of Mang Yang Pass: Viet Minh troops belonging to the 803rd Regiment ambush G.M.100 of France in An Khê.
June 27 » The FIFA World Cup quarterfinal match between Hungary and Brazil, highly anticipated to be exciting, instead turns violent, with three players ejected and further fighting continuing after the game.
July 5 » Elvis Presley records his first single, "That's All Right", at Sun Records in Memphis, Tennessee.
October 18 » Texas Instruments announces the first transistor radio.
When copying data from this family tree, please include a reference to the origin: J Eijsermans, "Eijsermans family tree", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-eijsermans/I488762.php : accessed March 7, 2026), "Sierk Hoekstra (1896-1954)".
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