February 11 » Anton Bruckner's 9th Symphony receives its first performance in Vienna, Austria.
April 26 » Atlético Madrid Association football club is founded
July 19 » Maurice Garin wins the first Tour de France.
August 3 » Macedonian rebels in Kruševo proclaim the Kruševo Republic, which exists for only ten days before Ottoman Turks lay waste to the town.
September 27 » The Wreck of the Old 97, an American rail disaster that became the subject of a popular ballad.
December 17 » The Wright brothers make the first controlled powered, heavier-than-air flight in the Wright Flyer at Kitty Hawk, North Carolina.
Day of marriage July 2, 1921
The temperature on July 2, 1921 was between 6.6 °C and 19.2 °C and averaged 13.2 °C. There was 2.1 mm of rain. There was 10.6 hours of sunshine (64%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northwest. 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 12 » Acting to restore confidence in baseball after the Black Sox Scandal, Judge Kenesaw Mountain Landis is elected as Major League Baseball's first commissioner.
February 21 » Rezā Shāh takes control of Tehran during a successful coup.
March 20 » The Upper Silesia plebiscite was a plebiscite mandated by the Versailles Treaty to determine a section of the border between Weimar Germany and Poland.
June 28 » Serbian King Alexander I proclaims the new constitution of the Kingdom of Serbs, Croats and Slovenes, known thereafter as the Vidovdan Constitution.
July 29 » Adolf Hitler becomes leader of the National Socialist German Workers Party.
October 29 » The Harvard University football team loses to Centre College, ending a 25-game winning streak. This is considered one of the biggest upsets in college football.
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/I45367.php : accessed January 25, 2026), "Roelfina Jacoba Pater (1903-)".
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