The temperature on January 11, 1921 was between 4.1 °C and 9.4 °C and averaged 6.4 °C. There was 0.1 mm of rain. There was 5.8 hours of sunshine (72%). 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.
January 20 » The first Constitution of Turkey is adopted, making fundamental changes in the source and exercise of sovereignty by consecrating the principle of national sovereignty.
February 21 » Constituent Assembly of the Democratic Republic of Georgia adopts the country's first constitution.
March 17 » The Second Polish Republic adopts the March Constitution.
March 24 » The 1921 Women's Olympiad begins in Monte Carlo, first international women's sports event.
July 27 » Researchers at the University of Toronto, led by biochemist Frederick Banting, prove that the hormone insulin regulates blood sugar.
December 6 » The Anglo-Irish Treaty is signed in London by British and Irish representatives.
When copying data from this family tree, please include a reference to the origin: P. Heres, "Family tree Eilander", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-eilander/I1099534898.php : accessed January 5, 2026), "Dirk Eijkelboom (1896-????)".
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