March 16 » In Melbourne the representatives of five colonies adopted a constitution, which would become the basis of the Commonwealth of Australia.
May 8 » The first games of the Italian football league system are played.
June 22 » Spanish–American War: In a chaotic operation, 6,000 men of the U.S. Fifth Army Corps begins landing at Daiquirí, Cuba, about 16 miles (26km) east of Santiago de Cuba. Lt. Gen. Arsenio Linares y Pombo of the Spanish Army outnumbers them two-to-one, but does not oppose the landings.
August 13 » Carl Gustav Witt discovers 433 Eros, the first near-Earth asteroid to be found.
December 10 » Spanish–American War: The Treaty of Paris is signed, officially ending the conflict.
December 26 » Marie and Pierre Curie announce the isolation of radium.
Day of marriage May 13, 1921
The temperature on May 13, 1921 was between 9.4 °C and 23.7 °C and averaged 16.5 °C. There was 8.0 hours of sunshine (51%). The average windspeed was 2 Bft (weak wind) and was prevailing from the south 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 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.
July 10 » Belfast's Bloody Sunday: Sixteen people are killed and 161 houses destroyed during rioting and gun battles in Belfast, Northern Ireland.
July 11 » A truce in the Irish War of Independence comes into effect.
September 21 » A storage silo in Oppau, Germany, explodes, killing 500–600 people.
November 4 » The Saalschutz Abteilung (hall defense detachment) of the Nazi Party is renamed the Sturmabteilung (storm detachment) after a large riot in Munich.
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: W.J. Oving, "Family tree Oving", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-oving/I2173.php : accessed March 2, 2026), "Derk Johan LUIMES (1898-????)".
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