The temperature on May 20, 1959 was between 11.4 °C and 19.3 °C and averaged 14.9 °C. There was 3.8 mm of rain during 1.4 hours. There was 4.5 hours of sunshine (28%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
April 8 » A team of computer manufacturers, users, and university people led by Grace Hopper meets to discuss the creation of a new programming language that would be called COBOL.
April 25 » The Saint Lawrence Seaway, linking the North American Great Lakes and the Atlantic Ocean, officially opens to shipping.
August 14 » Founding and first official meeting of the American Football League.
September 15 » Nikita Khrushchev becomes the first Soviet leader to visit the United States.
September 16 » The first successful photocopier, the Xerox 914, is introduced in a demonstration on live television from New York City.
October 12 » At the national congress of the American Popular Revolutionary Alliance in Peru, a group of leftist radicals are expelled from the party who later form APRA Rebelde.
When copying data from this family tree, please include a reference to the origin: Leen Schaap, "Database Schaap", database, Genealogy Online (https://www.genealogieonline.nl/database-schaap/I327.php : accessed December 25, 2025), "Marianne Margaretha Schaap (1959-)".
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