March 1 » Henri Becquerel discovers radioactive decay.
April 15 » Closing ceremony of the Games of the I Olympiad in Athens, Greece.
May 18 » The United States Supreme Court rules in Plessy v. Ferguson that the "separate but equal" doctrine is constitutional.
July 9 » William Jennings Bryan delivers his Cross of Gold speech advocating bimetallism at the 1896 Democratic National Convention in Chicago.
December 10 » Alfred Jarry's Ubu Roi premieres in Paris. A riot breaks out at the end of the performance.
December 14 » The Glasgow Underground Railway is opened by the Glasgow District Subway Company.
Day of marriage February 8, 1923
The temperature on February 8, 1923 was between 5.2 °C and 8.1 °C and averaged 6.7 °C. There was 1.8 mm of rain. There was -0.1 hours of sunshine (0%). The average windspeed was 5 Bft (very strong wind) and was prevailing from the south east. 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 10 » Texas Tech University is founded as Texas Technological College in Lubbock, Texas
February 16 » Howard Carter unseals the burial chamber of Pharaoh Tutankhamun.
June 27 » Capt. Lowell H. Smith and Lt. John P. Richter perform the first ever aerial refueling in a DH.4B biplane.
September 1 » The Great Kantō earthquake devastates Tokyo and Yokohama, killing about 105,000 people.
September 13 » Following a military coup in Spain, Miguel Primo de Rivera takes over, setting up a dictatorship.
October 16 » The Walt Disney Company is founded.
Day of death September 15, 1968
The temperature on September 15, 1968 was between 13.3 °C and 15.1 °C and averaged 14.0 °C. There was 8.1 mm of rain during 8.2 hours. The almost completely overcast was. The average windspeed was 2 Bft (weak wind) and was prevailing from the east-northeast. Source: KNMI
April 4 » Martin Luther King Jr. is assassinated by James Earl Ray at a motel in Memphis, Tennessee.
April 23 » Vietnam War: Student protesters at Columbia University in New York City take over administration buildings and shut down the university.
July 1 » The United States Central Intelligence Agency's Phoenix Program is officially established.
July 20 » The first International Special Olympics Summer Games are held at Soldier Field in Chicago, with about 1,000 athletes with intellectual disabilities.
October 22 » Apollo program: Apollo 7 safely splashes down in the Atlantic Ocean after orbiting the Earth 163 times.
December 9 » Douglas Engelbart gave what became known as "The Mother of All Demos", publicly debuting the computer mouse, hypertext, and the bit-mapped graphical user interface using the oN-Line System (NLS).
When copying data from this family tree, please include a reference to the origin: Nico Koedam, "Family tree Koedam", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-koedam/I161.php : accessed February 24, 2026), "Petrus Jonas (1896-1968)".
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