March 19 » Auguste and Louis Lumière record their first footage using their newly patented cinematograph.
March 22 » Before the Société pour L'Encouragement à l'Industrie, brothers Auguste and Louis Lumière demonstrate movie film technology publicly for the first time.
May 25 » The Republic of Formosa is formed, with Tang Jingsong as its president.
October 4 » Horace Rawlins wins the first U.S. Open Men's Golf Championship.
November 27 » At the Swedish–Norwegian Club in Paris, Alfred Nobel signs his last will and testament, setting aside his estate to establish the Nobel Prize after he dies.
December 28 » Wilhelm Röntgen publishes a paper detailing his discovery of a new type of radiation, which later will be known as x-rays.
Day of marriage December 30, 1920
The temperature on December 30, 1920 was between 6.1 °C and 12.7 °C and averaged 9.6 °C. There was 3.5 hours of sunshine (45%). The average windspeed was 5 Bft (very strong wind) and was prevailing from the west-southwest. 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.
April 15 » Two security guards are murdered during a robbery in South Braintree, Massachusetts. Anarchists Sacco and Vanzetti would be convicted of and executed for the crime, amid much controversy.
July 15 » The Polish Parliament establishes Silesian Voivodeship before the Polish-German plebiscite.
October 25 » After 74 days on hunger strike in Brixton Prison, England, the Sinn Féin Lord Mayor of Cork, Terence MacSwiney dies.
November 15 » The Free City of Danzig is established.
November 16 » Qantas, Australia's national airline, is founded as Queensland and Northern Territory Aerial Services Limited.
December 3 » Following more than a month of Turkish–Armenian War, the Turkish dictated Treaty of Alexandropol is concluded.
When copying data from this family tree, please include a reference to the origin: Joop Klavers, "Family tree Klavers", database, Genealogy Online (https://www.genealogieonline.nl/stamboom_klavers/I224232.php : accessed February 23, 2026), "Elle Ellens (1895-????)".
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