About the day » Tuesday April 21, 1964Calender converter

• Johannes Cornelis Oprins, Gilze en Rijen
• Hans Berkhof († 2019)
• Sonja Carolina Johanna van der Struijs, Vlaardingen, Zuid-Holland, Nederland († 2011)
• Jonathan Blackburn († 1964)
• Jacobus Martinus Bern. Sjaak Vork, Ter Aar († 2017)
• Edite Kemper, Vidal Ramos, Santa Catarina, Brasil († 1964)
• Hidde Dominicuszn. Engwerda, Warga, Idaarderadeel, Friesland, Nederland († 1964)
• johannes louis marie (hans) maessen, helden-panningen
• Gerrit Dam, Dokkum († 2015)
• Antonia Johanna Maria van der Steen, Ridderkerk, Zuid-Holland, Nederland

• Anna Olive Moose (75), Pittsburgh, Allegheny County, Pennsylvania
• Anna Maria Derikx (57), Horst
• Achien Bos (73), Delfzijl, Groningen, Nederland
• Adrianus Jacobus Bankras (51), Hoorn
• Adrianus Maria van der Rijken (37), Amsterdam
• Anna Cornelia Dingena van Dongen (88), Rotterdam,Zuid-Holland,Nederland
• Anna Maria Derikx (57), Horst, Limburg, Netherlands
• Christina Bukkems (87), Eindhoven
• Aleida Johanna Berens (66), Doesburg (Gld.)
• Cecil Allan Wallace (81), Howick, Auckland, New Zealand

• 1963 » John Cameron Mitchell, American actor, director, and screenwriter
• 1963 » Ken Caminiti, American baseball player († 2004)
• 1963 » Roy Dupuis, Canadian actor
• 1964 » Alex Baumann, Czech-Canadian swimmer
• 1964 » Ludmila Engquist, Russian-Swedish hurdler
• 1965 » Ed Belfour, Canadian ice hockey player
• 1965 » Fiona Kelleghan, American academic, critic and librarian
• 1965 » Gary Grant, American basketball player
• 1965 » Karen Foster, American model and actress
• 1965 » Thomas Helmer, German footballer

• 1952 » Leslie Banks, American actor, director and producer (b. 1890)
• 1954 » Emil Leon Post, Polish-American mathematician and logician (b. 1897)
• 1956 » Charles MacArthur, American playwright and screenwriter (b. 1895)
• 1965 » Edward Victor Appleton, English-Scottish physicist and academic, Nobel Prize laureate (b. 1892)
• 1971 » François Duvalier, Haitian physician and politician, 40th President of Haiti (b. 1907)
• 1973 » Arthur Fadden, Australian accountant and politician, 13th Prime Minister of Australia (b. 1894)
• 1973 » Kemal Tahir, Turkish journalist and author (b. 1910)
• 1974 » Chic Harley, American football player (b. 1894)
• 1977 » Gummo Marx, American vaudevillian and talent agent (b. 1893)
• 1978 » Sandy Denny, English singer-songwriter (b.1947)

1. Jan
2. Johannes
3. Peter
4. Robert
5. Ronald
6. John
7. Cornelis
8. Hendrik
9. Paul
10. Pieter
11. Marcel
12. Richard
13. Mark
14. Gerrit
15. Willem
16. Johan

1. Maria
2. Johanna
3. Anna
4. Elisabeth
5. Monique
6. Yvonne
7. Cornelia
8. Jolanda
9. Anita
10. Karin
11. Ingrid
12. Catharina
13. Jacqueline
14. Wilhelmina
15. Petra
16. Caroline

• Koningin Juliana (Huis van Oranje-Nassau) was from September 4, 1948 till April 30, 1980 sovereign of the Netherlands (also known as Koninkrijk der Nederlanden)
• In The Netherlands , there was from July 24, 1963 to April 14, 1965 the cabinet Marijnen, with Mr. V.G.M. Marijnen (KVP) as prime minister.
• The Netherlands had about 12.0 million citizens.
• April 8 » The Gemini 1 test flight is conducted.
• July 19 » Vietnam War: At a rally in Saigon, South Vietnamese Prime Minister Nguyễn Khánh calls for expanding the war into North Vietnam.
• August 1 » The former Belgian Congo is renamed the Democratic Republic of the Congo.
• October 16 » China detonates its first nuclear weapon.
• November 28 » Mariner program: NASA launches the Mariner 4 probe toward Mars.
• December 1 » Vietnam War: U.S. President Lyndon B. Johnson and his top-ranking advisers meet to discuss plans to bomb North Vietnam.

The temperature on April 21, 1964 was between 8.0 °C and 16.5 °C and averaged 11.7 °C. There was 0.8 mm of rain during 0.7 hours. There was 8.0 hours of sunshine (56%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south.