About the day » Friday April 21, 1967Calender converter

• Martine Marchal
• Fedor Ronald Bruno Visser († 1989)
• Hans Wartel, Asse, Vlaams-Brabant, België
• Alexander van Luijk, Rotterdam († 1967)
• Albert Cornelis van Duijvenbode, Katwijk († 1974)
• Lieve Vanthournoudt, Roeselare († 1990)
• Kenneth William Knibbe, Lapeer, Michigan, Verenigde Staten († 2000)

• Christiaan Theodorus Griffioen (71), Amsterdam, Noord-Holland, Nederland
• Aagje Kliffen (72), Andijk
• Anna Josepha Gilissen (65), Kerkrade
• Albertje Booij (80), Utrecht
• Adriana Clarisse (79), Vlissingen, Walcheren, NL
• Christiaan Hooft (79), 's-Gravenhage, Zuid-Holland, Nederland
• Barbara Johanna Boendermaker (77), Amsterdam, Nederland
• Anna Josepha Gilissen (65), Kerkrade
• Caspar Hubertus Heuvelmans (82), Roermond,, Limburg, Nederland
• Arie Gerrit Verboom (67), Halsteren, Nederland

• 1964 » Alex Baumann, Czech-Canadian swimmer
• 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
• 1967 » Emilio Valle, Cuban hurdler
• 1968 » Peter van Vossen, Dutch footballer and coach
• 1969 » John Kibowen, Kenyan runner
• 1969 » Toby Stephens, English actor

• 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)
• 1978 » Thomas Wyatt Turner, American biologist and academic (b. 1877)

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

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

• 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 November 22, 1966 to April 5, 1967 the cabinet Zijlstra, with Prof. dr. J. Zijlstra (ARP) as prime minister.
• In The Netherlands , there was from April 5, 1967 to Tuesday, July 6, 1971 the cabinet De Jong, with P.J.S. de Jong (KVP) as prime minister.
• The Netherlands had about 12.5 million citizens.
• February 10 » The 25th Amendment to the United States Constitution is ratified.
• April 28 » Vietnam War: Boxer Muhammad Ali refuses his induction into the United States Army and is subsequently stripped of his championship and license.
• May 10 » The Northrop M2-F2 crashes on landing, becoming the inspiration for the novel Cyborg and TV series The Six Million Dollar Man.
• June 2 » Luis Monge is executed in Colorado's gas chamber, in the last pre-Furman execution in the United States.
• September 15 » U.S. President Lyndon B. Johnson, responding to a sniper attack at the University of Texas at Austin, writes a letter to Congress urging the enactment of gun control legislation.
• October 18 » The Soviet probe Venera 4 reaches Venus and becomes the first spacecraft to measure the atmosphere of another planet.

The temperature on April 21, 1967 was between 1.1 °C and 9.2 °C and averaged 5.7 °C. There was 1.8 mm of rain during 1.4 hours. There was 7.3 hours of sunshine (51%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-northwest.