January 28 » Walter Arnold of East Peckham, Kent, becomes the first person to be convicted of speeding. He was fined one shilling, plus costs, for speeding at 8mph (13km/h), thereby exceeding the contemporary speed limit of 2mph (3.2km/h).
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.
April 15 » Closing ceremony of the Games of the I Olympiad in Athens, Greece.
June 2 » Guglielmo Marconi applies for a patent for his wireless telegraph.
December 17 » Pittsburgh, Pennsylvania's Schenley Park Casino, which was the first multi-purpose arena with the technology to create an artificial ice surface in North America, is destroyed in a fire.
Day of marriage April 25, 1923
The temperature on April 25, 1923 was between -2.4 °C and 11.1 °C and averaged 6.0 °C. There was 3.1 mm of rain. There was 0.1 hours of sunshine (1%). The average windspeed was 5 Bft (very strong 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.
April 26 » The Duke of York weds Lady Elizabeth Bowes-Lyon at Westminster Abbey.
September 4 » Maiden flight of the first U.S. airship, the USSShenandoah.
September 9 » Mustafa Kemal Atatürk, the founder of the Republic of Turkey, founds the Republican People's Party.
September 29 » The First American Track & Field championships for women are held.
October 6 » The Turkish National Movement enters Constantinople.
November 9 » In Munich, Germany, police and government troops crush the Beer Hall Putsch in Bavaria. The failed coup is the work of the Nazis.
Day of death July 2, 1968
The temperature on July 2, 1968 was between 19.3 °C and 30.6 °C and averaged 24.4 °C. There was 10.4 hours of sunshine (62%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south east. Source: KNMI
February 1 » Vietnam War: The execution of Viet Cong officer Nguyễn Văn Lém by South Vietnamese National Police Chief Nguyễn Ngọc Loan is recorded on motion picture film, as well as in an iconic still photograph taken by Eddie Adams.
May 26 » H-dagurinn in Iceland: Traffic changes from driving on the left to driving on the right overnight
September 24 » First episode of 60 Minutes airs on television.
September 30 » The Boeing 747 is rolled out and shown to the public for the first time.
December 10 » Japan's biggest heist, the still-unsolved "300 million yen robbery", is carried out in Tokyo.
December 20 » The Zodiac Killer kills Betty Lou Jenson and David Faraday in Vallejo, California.
When copying data from this family tree, please include a reference to the origin: Martin Ploeger, "Family tree Ploeger", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-ploeger/I34.php : accessed March 5, 2026), "Harm Albert Ploeger (1896-1968)".
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