January 1 » Nigeria becomes a British protectorate.
February 20 » The legislature of Hawaii Territory convenes for the first time.
April 25 » New York becomes the first U.S. state to require automobile license plates.
September 14 » U.S. President William McKinley dies after being mortally wounded on September 6 by anarchist Leon Czolgosz and is succeeded by Vice President Theodore Roosevelt.
October 29 » Leon Czolgosz, the assassin of U.S. President William McKinley, is executed by electrocution.
November 27 » The U.S. Army War College is established.
Day of marriage December 20, 1924
The temperature on December 20, 1924 was between 5.1 °C and 6.8 °C and averaged 6.0 °C. The average windspeed was 2 Bft (weak wind) and was prevailing from the south-southwest. Source: KNMI
In The Netherlands , there was from September 19, 1922 to August 4, 1925 the cabinet Ruys de Beerenbrouck II, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
February 12 » George Gershwin's Rhapsody in Blue received its premiere in a concert titled "An Experiment in Modern Music", in Aeolian Hall, New York, by Paul Whiteman and his band, with Gershwin playing the piano.
March 3 » The 407-year-old Islamic caliphate is abolished, when Caliph Abdülmecid II of the Ottoman Caliphate is deposed. The last remnant of the old regime gives way to the reformed Turkey of Kemal Atatürk.
March 25 » On the anniversary of Greek Independence, Alexandros Papanastasiou proclaims the Second Hellenic Republic.
June 10 » Fascists kidnap and kill Italian Socialist leader Giacomo Matteotti in Rome.
October 7 » Andreas Michalakopoulos becomes prime minister of Greece for a short period of time.
November 23 » Edwin Hubble's discovery, that the Andromeda "nebula" is actually another island galaxy far outside of our own Milky Way, is first published in The New York Times.
Day of death June 30, 1954
The temperature on June 30, 1954 was between 5.0 °C and 17.3 °C and averaged 12.1 °C. There was 9.0 hours of sunshine (54%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the north-northwest. Source: KNMI
January 7 » Georgetown-IBM experiment: The first public demonstration of a machine translation system is held in New York at the head office of IBM.
March 19 » Joey Giardello knocks out Willie Tory in round seven at Madison Square Garden in the first televised prize boxing fight shown in colour.
April 8 » A Royal Canadian Air Force Canadair Harvard collides with a Trans-Canada Airlines Canadair North Star over Moose Jaw, Saskatchewan, killing 37 people.
May 13 » The anti-National Service Riots, by Chinese middle school students in Singapore, take place.
July 5 » The BBC broadcasts its first television news bulletin.
July 21 » First Indochina War: The Geneva Conference partitions Vietnam into North Vietnam and South Vietnam.
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/I13422.php : accessed February 14, 2026), "Roelof Petrus Gerhardus Dreyer (1901-1954)".
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