The temperature on May 21, 1957 was between 9.7 °C and 14.4 °C and averaged 11.3 °C. There was 1.5 mm of rain during 1.5 hours. There was 3.3 hours of sunshine (21%). The heavily clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the northwest. Source: KNMI
February 22 » Ngô Đình Diệm of South Vietnam survives a communist shooting assassination attempt in Buôn Ma Thuột.
April 9 » The Suez Canal in Egypt is cleared and opens to shipping following the Suez Crisis.
May 15 » At Malden Island in the Pacific Ocean, Britain tests its first hydrogen bomb in Operation Grapple.
September 4 » American Civil Rights Movement: Little Rock Crisis: Orval Faubus, governor of Arkansas, calls out the National Guard to prevent African American students from enrolling in Central High School.
November 8 » Operation Grapple X, Round C1: The United Kingdom conducts its first successful hydrogen bomb test over Kiritimati in the Pacific.
December 20 » The initial production version of the Boeing 707 makes its first flight.
When copying data from this family tree, please include a reference to the origin: J Eijsermans, "Eijsermans family tree", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-eijsermans/I230708.php : accessed January 22, 2026), "Johanna Pietronella Jacobs (± 1889-1957)".
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