About the day » Friday April 21, 1911Calender converter

• Aaldert Booij, Emmer-Erfscheidenveen, Emmen, Drenthe, Nederland († 1998)
• Adriana Clazina Cieremans, Rotterdam, Zuid-Holland, Nederland
• Adrianus Petrus van de Ven, Cromvoirt († 1954)
• Aleida Hendrina Hulstijn, Amsterdam
• Aaltje van der Weide, Hoogeveen († 1997)
• Adrianus J. Warmerdam, Noordwijkerhout, ZUI, Nederland († 1911)
• Adriana Dubbeldam, Strijen, Zuid-Holland, Nederland, Nederland († 2001)
• "Ogier"-Mathieu Marie de Lesseps, Meaux, Seine-et-Marne, France († 1975)
• van Gelder, Kampen († 1962)
• Adrianus Johannes Warmerdam, Gemeente Noordwijkerhout, Zuid-Holland, Nederland († 1911)

• Adriana Baaren (76), Tiel
• Antje Kalsbeek (73), Opsterland
• Aagje van Oorschot (34), Dordrecht Z.H
• Antje Freerks Kalsbeek (49)
• Adriaan Leeuwe (81), Zierikzee
• Antje Ates Kalsbeek (73), Ureterp
• Aartje Hardeman (84), Ede, Gelderland, Nederland
• Anna Maria Vesters (0), Uden
• Anna Maria Reichardt (72), Marion County
• Anna Barbara LEMMENS (66), Klimmen,,PAYS BAS

• 1905 » Pat Brown, American lawyer and politician, 32nd Governor of California († 1996)
• 1911 » Ivan Combe, American businessman, developed Clearasil († 2000)
• 1911 » Kemal Satır, Turkish physician and politician († 1991)
• 1912 » Eve Arnold, Russian-American photojournalist († 2012)
• 1912 » Marcel Camus, French director and screenwriter († 1982)
• 1913 » Norman Parkinson, English photographer († 1990)
• 1914 » Angelo Savoldi, Italian-American wrestler and promoter, co-founded International World Class Championship Wrestling († 2013)
• 1915 » Anthony Quinn, Mexican-American actor († 2001)
• 1915 » Garrett Hardin, American ecologist, author, and academic († 2003)
• 1916 » Estella B. Diggs, American businesswoman and politician († 2013)

• 1900 » Vikramatji Khimojiraj, Indian ruler (b. 1819)
• 1910 » Mark Twain, American novelist, humorist, and critic (b. 1835)
• 1918 » Manfred von Richthofen, German captain and pilot (b. 1892)
• 1924 » Eleonora Duse, Italian actress (b. 1858)
• 1930 » Robert Bridges, English poet and author (b. 1844)
• 1932 » Friedrich Gustav Piffl, Bohemian cardinal (b. 1864)
• 1938 » Muhammad Iqbal, Indian-Pakistani philosopher and poet (b. 1877)
• 1941 » Fritz Manteuffel, German gymnast (b. 1875)
• 1945 » Walter Model, German field marshal (b. 1891)
• 1946 » John Maynard Keynes, English economist and philosopher (b. 1883)

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

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

• 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 February 12, 1908 to August 29, 1913 the cabinet Heemskerk, with Mr. Th. Heemskerk (AR) as prime minister.
• The Netherlands had about 6.0 million citizens.
• February 18 » The first official flight with airmail takes place from Allahabad, United Provinces, British India (now India), when Henri Pequet, a 23-year-old pilot, delivers 6,500 letters to Naini, about 10 kilometres (6.2mi) away.
• May 9 » The works of Gabriele D'Annunzio are placed in the Index of Forbidden Books by the Vatican.
• May 15 » More than 300 Chinese immigrants are killed in the Torreón massacre when the forces of the Mexican Revolution led by Emilio Madero take the city of Torreón from the Federales.
• June 22 » Mexican Revolution: Government forces bring an end to the Magonista rebellion of 1911 in the Second Battle of Tijuana.
• October 10 » The day after a bomb explodes prematurely, the Wuchang Uprising begins against the Chinese monarchy.
• December 9 » A mine explosion near Briceville, Tennessee, kills 84 miners despite rescue efforts led by the United States Bureau of Mines.

The temperature on April 21, 1911 was between 1.3 °C and 15.1 °C and averaged 9.7 °C. There was 4.6 hours of sunshine (32%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the southwest.