About the day » Wednesday April 20, 1921Calender converter

• Albert Jan Sikkens, Leens, Groningen, Nederland († 1997)
• André van der Laaken, Amsterdam († 2002)
• Abel BOS, vlagtwedde († 1991)
• Antonius Marius Muurmans, Tilburg († 1921)
• Catharina Hubertina Franssen, Neer († 2010)
• Cornelia Hendrika van der Schoot, Boxtel, Noord-Brabant, Nederland († 1998)
• Agatha Maria Bruin, Alkmaar, Nederland († 1952)
• van der Weide, Bergentheim, Hardenberg, Overijssel, Nederland († 1921)
• Anton Hubert Gerard Stijfs, Merkelbeek († 2011)
• Agatha Maria Bruin, Alkmaar († 1952)

• Bastiaan Eikelenboom (0), Meerkerk, zh.nld
• Adriananus Wilhelmus Horsten (64), Tilburg Nederland
• Andries Taekes Deinum (61), Workum
• Berend Kuik (72), Sneek
• Albert Arthur Crisp (57), 33 Perryvale, Forest Hill, South London, England
• Anna Maria Cortina Kraag (73), djokjakarta
• Anna Josepha Kortrijk (35), Hengelo, Overijssel, Nederland, Overijssel, Nederland
• Arie den Houter (68), Hillegersberg, Zuid-Holland, Nederland
• Armand Gabeler (0), Klaten / Solo / Nederlands Indie / bron BKNGGW 1923 166 CBG
• Adrianus GRINWIS Wzn (18), Ouddorp, Goeree-Overflakkee, NL-ZH

• 1918 » Kai Siegbahn, Swedish physicist and academic, Nobel Prize laureate († 2007)
• 1919 » Richard Hillary, Australian lieutenant and pilot († 1943)
• 1920 » Clement Isong, Nigerian banker and politician, Governor of Cross River State († 2000)
• 1920 » Frances Ames, South African neurologist, psychiatrist, and human rights activist († 2002)
• 1920 » John Paul Stevens, American lawyer and jurist, Associate Justice of the Supreme Court of the United States († 2019)
• 1920 » Ronald Speirs, American colonel († 2007)
• 1923 » Irene Lieblich, Polish-American painter and illustrator († 2008)
• 1923 » Mother Angelica, American nun and broadcaster, founded Eternal Word Television Network († 2016)
• 1923 » Tito Puente, American drummer and producer († 2000)
• 1924 » Nina Foch, Dutch-American actress († 2008)

• 1902 » Joaquim de Sousa Andrade, Brazilian poet and educator (b. 1833)
• 1912 » Bram Stoker, Anglo-Irish novelist and critic, created Count Dracula (b. 1847)
• 1918 » Karl Ferdinand Braun, German-American physicist and academic, Nobel Prize laureate (b. 1850)
• 1927 » Enrique Simonet, Spanish painter and educator (b. 1866)
• 1929 » Prince Henry of Prussia (b. 1862)
• 1931 » Sir Cosmo Duff-Gordon, 5th Baronet, Scottish-English fencer and businessman (b. 1862)
• 1932 » Giuseppe Peano, Italian mathematician and philosopher (b. 1858)
• 1935 » John Cameron, Scottish footballer and manager (b. 1872)
• 1935 » Lucy, Lady Duff-Gordon, English fashion designer (b. 1863)
• 1942 » Jüri Jaakson, Estonian businessman and politician, 6th State Elder of Estonia (b. 1870)

1. Johannes
2. Jan
3. Cornelis
4. Hendrik
5. Willem
6. Pieter
7. Gerrit
8. Adrianus
9. Petrus
10. Jacob
11. Jacobus
12. Wilhelmus
13. Gerardus
14. Antonius
15. Hendrikus
16. Arie

1. Maria
2. Johanna
3. Anna
4. Cornelia
5. Wilhelmina
6. Elisabeth
7. Adriana
8. Hendrika
9. Catharina
10. Petronella
11. Jacoba
12. Grietje
13. Aaltje
14. Geertruida
15. Jantje
16. Helena

• Koningin Wilhelmina (Huis van Oranje-Nassau) was from 1890 till 1948 sovereign of the Netherlands (also known as Koninkrijk der Nederlanden)
• 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.
• The Netherlands had about 6.9 million citizens.
• 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 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.
• July 11 » The Red Army captures Mongolia from the White Army and establishes the Mongolian People's Republic.
• 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.

The temperature on April 20, 1921 was between -1.6 °C and 10.4 °C and averaged 5.0 °C. There was 4.1 mm of rain. There was 4.9 hours of sunshine (35%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-northwest.