The temperature on May 25, 1964 was between 14.0 °C and 26.6 °C and averaged 20.5 °C. There was 12.4 hours of sunshine (77%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east. Source: KNMI
February 9 » The Beatles make their first appearance on The Ed Sullivan Show, performing before a "record-busting" audience of 73 million viewers across the USA.
March 19 » Over 500,000 Brazilians attend the March of the Family with God for Liberty, in protest against the government of João Goulart and against communism.
March 31 » Brazilian General Olímpio Mourão Filho orders his troops to move towards Rio de Janeiro, beginning the coup d'état.
June 11 » World War II veteran Walter Seifert attacks an elementary school in Cologne, Germany, killing at least eight children and two teachers and seriously injuring several more with a home-made flamethrower and a lance.
June 28 » Malcolm X forms the Organization of Afro-American Unity.
December 22 » The first test flight of the SR-71 (Blackbird) takes place at Air Force Plant 42 in Palmdale, California, United States.
When copying data from this family tree, please include a reference to the origin: Irene Jolanda van der Meulen, "Family tree Ype Ypes (waaronder van der Meulen)", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-ype-ypes/I3519.php : accessed January 30, 2026), "Hindrik Jan Zondervan (1964-)".
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