About the day » Saturday April 21, 1917Calender converter

• Alexandre van der Maren († 1995)
• Adrianus Hendrikus Antonius van Loon, Gilze en Rijen († 1997)
• Bernardus Cornelis Vreijsen, Dongen († 1993)
• André Gustaaf Loete, Waarschoot, Belgium († 1986)
• Aris Pie, Warmenhuizen, Noord-Holland, Nederland († 1985)
• Carl Stephenson Ashby († 1980)
• Albertus Antonius Krijger, Zwolle († 1977)
• Annigje Kleine († 1989)
• Adriana Joostina Hillegonda Brons († 1917)
• Adriana Alida Zwaanenburg, Rotterdam, Nederland († 2010)

• (2) Anna Maria Tjeertes (33), Heiloo, Noord-Holland, Nederland Nederland
• Aalbert Stevensen (van den Brink) (83), Nijkerk
• Anna Maria Tjeertes (33), Heiloo, Noord-Holland, Nederland
• Amanda M. Taylor (73), Roane, West Virginia, Verenigde Staten
• Adriana van Vliet (88), Rotterdam (Zuid-Holland)
• Aartje Hulleman (85), Nunspeet
• Albert van Essen (63), Steenwijk
• Aartje Smit (48), Katwijk, Zuid-Holland, Nederland
• Alfred Clément Joseph LIEUTENANT (58), Spa, Liege, Belgium
• Aloisius Link (50), Amsterdam

• 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)
• 1918 » Eddy Christiani, Dutch singer-songwriter and guitarist († 2016)
• 1919 » Don Cornell, American singer († 2004)
• 1919 » Licio Gelli, Italian financer († 2015)
• 1919 » Roger Doucet, Canadian tenor († 1981)
• 1920 » Edmund Adamkiewicz, German footballer († 1991)

• 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. Jacobus
11. Jacob
12. Albert
13. Gerardus
14. Dirk
15. Wilhelmus
16. Arie

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

• 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 August 29, 1913 to September 9, 1918 the cabinet Cort van der Linden, with Mr. P.W.A. Cort van der Linden (liberaal) as prime minister.
• The Netherlands had about 6.5 million citizens.
• January 19 » Silvertown explosion: A blast at a munitions factory in London kills 73 and injures over 400. The resulting fire causes over £2,000,000 worth of damage.
• April 2 » World War I: United States President Woodrow Wilson asks the U.S. Congress for a declaration of war on Germany.
• April 16 » Vladimir Lenin returns to Petrograd, Russia, from exile in Switzerland.
• July 17 » King George V issues a Proclamation stating that the male line descendants of the British Royal Family will bear the surname Windsor.
• October 13 » The "Miracle of the Sun" is witnessed by an estimated 70,000 people in the Cova da Iria in Portugal.
• October 25 » Old Style date of the October Revolution in Russia.

The temperature on April 21, 1917 was between 3.4 °C and 9.8 °C and averaged 5.8 °C. There was 3.5 hours of sunshine (25%). The average windspeed was 5 Bft (very strong wind) and was prevailing from the north-northwest.