The temperature on December 20, 1912 was between 0.5 °C and 8.0 °C and averaged 4.4 °C. There was 5.5 hours of sunshine (71%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south. Source: KNMI
January 8 » The African National Congress is founded, under the name South African Native National Congress (SANNC).
July 8 » Henrique Mitchell de Paiva Couceiro leads an unsuccessful royalist attack against the First Portuguese Republic in Chaves.
August 6 » The Bull Moose Party meets at the Chicago Coliseum.
October 18 » First Balkan War: King Peter I of Serbia issues a declaration "To the Serbian People", as his country joins the war.
October 19 » Italo-Turkish War: Italy takes possession of what is now Libya from the Ottoman Empire.
November 2 » Bulgaria defeats the Ottoman Empire in the Battle of Lule Burgas, the bloodiest battle of the First Balkan War, which opens her way to Constantinople.
Day of marriage July 21, 1938
The temperature on July 21, 1938 was between 13.7 °C and 18.7 °C and averaged 16.0 °C. The average windspeed was 2 Bft (weak wind) and was prevailing from the northwest. Source: KNMI
February 11 » BBC Television produces the world's first ever science fiction television programme, an adaptation of a section of the Karel Čapek play R.U.R., that coined the term "robot".
July 31 » Bulgaria signs a non-aggression pact with Greece and other states of Balkan Antanti (Turkey, Romania, Yugoslavia).
August 18 » The Thousand Islands Bridge, connecting New York, United States with Ontario, Canada over the Saint Lawrence River, is dedicated by U.S. President Franklin D. Roosevelt.
September 30 » The League of Nations unanimously outlaws "intentional bombings of civilian populations".
October 10 » Abiding by the Munich Agreement, Czechoslovakia completes its withdrawal from the Sudetenland.
October 14 » The first flight of the Curtiss P-40 Warhawk fighter plane.
When copying data from this family tree, please include a reference to the origin: Elly Gelderman, "Family tree Gelderman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-gelderman/I7627.php : accessed February 4, 2026), "Dorothea Roggen (1912-)".
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