About the day » Wednesday April 21, 1915Calender converter

• Albert Guillaume Claes, Ulbeek, België († 1916)
• Achilles Peter Johannes Hubertus Crooijmans, Venlo († 2000)
• Albertina van der Eijk, Utrecht († 1988)
• Afra Besseling, Wognum, Noord-Holland, Nederland
• Amy Beatrice Enger, Bode († 1975)
• Agatha Geertruida Nobels, Ooltgensplaat († 1991)
• Alida Schipper, Hoogkarspel
• Adriana Jozina Geelhoed, Colijnsplaat
• "Paulette" Marie-Thérèse Jeanne Dodinot, Châteauroux, Indre, France († 1989)
• Andries de Vries, Kollum, Friesland, Nederland († 1978)

• Antal Schlegl (40), Újbarok,Fejér,Ungarn,2066,H
• Arie van Dijk (53), Rotterdam, Zuid-Holland, The Netherlands
• Antje van Dijk (65)
• Alida Kouwenhoven (50), Monster, Westland, Zuid-Holland, Nederland
• Albertje Zoer (68), Noord,Hoogeveen,Drenthe,Netherlands
• August Friedrich Wilhelm Schütt, Landgraaf (Schaesberg) (Limburg)
• Anna Remmerswaal (63), Den Haag
• Ariën Takken (72), Nieuwe Niedorp, Hollands Kroon, Noord-Holland, Nederland
• Arnoldus jacobus Ammerlaan (33)
• Antonius Meijers (77), Zeeland, Noord-Brabant, Nederland

• 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)
• 1918 » Eddy Christiani, Dutch singer-songwriter and guitarist († 2016)

• 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)

• 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 6.3 million citizens.
• January 12 » The United States House of Representatives rejects a proposal to require states to give women the right to vote.
• January 19 » German strategic bombing during World War I: German zeppelins bomb the towns of Great Yarmouth and King's Lynn in the United Kingdom killing at least 20 people, in the first major aerial bombardment of a civilian target.
• January 21 » Kiwanis International is founded in Detroit.
• May 9 » World War I: Second Battle of Artois between German and French forces.
• June 9 » William Jennings Bryan resigns as Woodrow Wilson's Secretary of State over a disagreement regarding the United States' handling of the sinking of the RMSLusitania.
• September 30 » World War I: Radoje Ljutovac becomes the first soldier in history to shoot down an enemy aircraft with ground-to-air fire.

The temperature on April 21, 1915 was between 1.3 °C and 11.4 °C and averaged 6.9 °C. There was 7.3 hours of sunshine (51%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north.