About the day » Wednesday May 11, 1921Calender converter

• Anna Maria Ruiter († 1994)
• Anna KOOIJ, 's-Gravendeel († 1996)
• Anne Draaijer, Workum († 1987)
• Adriana Pieternella Fonteijne, Oosterland († 1949)
• Aaltje de Jong, Lonneker († 2016)
• Adrianus Gerardus Sweere, Willemstad, Noord-Brabant, Nederland († 1991)
• Aaltje "Aly" de Jong, Lonneker, Enschede, Nederland († 2016)
• Berend Hegen, Wezup, Zweeloo, Drenthe, Nederland († 2017)
• Annie Meijer († 1998)
• Aleida Pap, Wilsum († 2021)

• Bergsma (0), Ferwerderadeel
• Aaltje Koops (86), Kampen, Overijssel, Nederland
• * Petronella van der Lee (54), NH, Nederland
• Aaltje Gerrits Koops (86), Kamperveen, Nederland
• Adrianus (Adrian) Gloudemans (98), Little Chute, Wisconsin, Verenigde Staten
• Adriana Cornelia van den Kieboom (35), Bergen op Zoom
• Arij van Geest (78), De Lier
• Adriana Cornelia van den Kieboom (35), Bergen op Zoom, N-Br, NL
• Catharina Caris (46)
• Martje Aalders (0), Zevenhuizen

• 1912 » Saadat Hasan Manto, Indian-Pakistani author and screenwriter († 1955)
• 1916 » Camilo José Cela, Spanish author and politician, Nobel Prize laureate († 2002)
• 1918 » Richard Feynman, American physicist and engineer, Nobel Prize laureate († 1988)
• 1921 » Hildegard Hamm-Brücher, German politician († 2016)
• 1921 » Robin Barbour, Scottish minister and author († 2014)
• 1924 » Antony Hewish, English astronomer and academic, Nobel Prize laureate
• 1925 » Edward J. King, American football player and politician, 66th Governor of Massachusetts († 2006)
• 1927 » Bernard Fox, British actor († 2016)
• 1927 » Gene Savoy, American explorer, author, and scholar († 2007)
• 1930 » Edsger W. Dijkstra, Dutch computer scientist and academic († 2002)

• 1889 » John Cadbury, English businessman and philanthropist, founded the Cadbury Company (b. 1801)
• 1908 » Charles Kingston, Australian politician, 20th Premier of South Australia (b. 1850)
• 1916 » Karl Schwarzschild, German astronomer and physicist (b. 1873)
• 1918 » George Elmslie, Australian politician, 25th Premier of Victoria (b. 1861)
• 1920 » James Colosimo, Italian-American mob boss (b. 1878)
• 1920 » William Dean Howells, American novelist, literary critic, and playwright (b. 1837)
• 1927 » Juan Gris, Spanish painter and sculptor (b. 1887)
• 1929 » Jozef Murgaš, Slovak-American priest, architect, botanist, and painter (b. 1864)
• 1938 » George Lyon, Canadian golfer and cricketer (b. 1858)
• 1955 » Gilbert Jessop, English cricketer (b. 1874)

• 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.
• March 6 » Portuguese Communist Party is founded as the Portuguese Section of the Communist International.
• March 31 » The Royal Australian Air Force is formed.
• 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.
• October 29 » United States: Second trial of Sacco and Vanzetti in Boston, Massachusetts.
• December 22 » Opening of Visva-Bharati College, also known as Santiniketan College, now Visva Bharati University, India.

The temperature on May 11, 1921 was between 4.2 °C and 19.8 °C and averaged 13.0 °C. There was 0.1 mm of rain. There was 9.9 hours of sunshine (64%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south east.