March 1 » Henri Becquerel discovers radioactive decay.
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 » Nicholas II becomes the last Tsar of Imperial Russia.
June 4 » Henry Ford completes the Ford Quadricycle, his first gasoline-powered automobile, and gives it a successful test run.
July 28 » The city of Miami, Florida is incorporated.
December 14 » The Glasgow Underground Railway is opened by the Glasgow District Subway Company.
Day of marriage November 3, 1920
The temperature on November 3, 1920 was between -2.5 °C and 8.7 °C and averaged 2.4 °C. There was 7.0 hours of sunshine (73%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east. 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.
January 10 » The Treaty of Versailles takes effect, officially ending World War I.
May 3 » A Bolshevik coup fails in the Democratic Republic of Georgia.
June 4 » Hungary loses 71% of its territory and 63% of its population when the Treaty of Trianon is signed in Paris.
July 11 » In the East Prussian plebiscite the local populace decides to remain with Weimar Germany.
July 20 » The Greek Army takes control of Silivri after Greece is awarded the city by the Paris Peace Conference; by 1923 Greece effectively lost control to the Turks.
July 29 » Construction of the Link River Dam begins as part of the Klamath Reclamation Project.
Day of death June 26, 1960
The temperature on June 26, 1960 was between 16.6 °C and 25.9 °C and averaged 20.8 °C. There was 14.5 hours of sunshine (87%). The partly clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the north. Source: KNMI
March 9 » Dr. Belding Hibbard Scribner implants for the first time a shunt he invented into a patient, which allows the patient to receive hemodialysis on a regular basis.
May 3 » The Off-Broadway musical comedy The Fantasticks opens in New York City's Greenwich Village, eventually becoming the longest-running musical of all time.
May 11 » Adolf Eichmann is captured by the Mossad in Argentina.
September 14 » The Organization of Petroleum Exporting Countries (OPEC) is founded.
November 1 » While campaigning for President of the United States, John F. Kennedy announces his idea of the Peace Corps.
December 15 » Richard Pavlick is arrested for plotting to assassinate U.S. President-Elect John F. Kennedy.
When copying data from this family tree, please include a reference to the origin: Jan Kaper, "Family tree Kaper", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-kaper/I12092.php : accessed February 5, 2026), "Jantinus Mulder (1896-1960)".
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