The temperature on August 13, 1957 was between 12.6 °C and 20.8 °C and averaged 16.6 °C. There was 3.4 hours of sunshine (23%). The partly or heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
January 11 » The African Convention is founded in Dakar, Senegal.
January 14 » Kripalu Maharaj was named fifth Jagadguru (world teacher) after giving seven days of speeches before 500 Hindu scholars.
January 31 » Eight people (5 total crew from 2 aircraft and 3 on the ground) in Pacoima, California are killed following the mid-air collision between a Douglas DC-7 airliner and a Northrop F-89 Scorpion fighter jet.
October 1 » First appearance of In God we trust on U.S. paper currency.
October 4 » Sputnik 1 becomes the first artificial satellite to orbit the Earth.
November 1 » The Mackinac Bridge, the world's longest suspension bridge between anchorages at the time, opens to traffic connecting Michigan's upper and lower peninsulas.
When copying data from this family tree, please include a reference to the origin: Gert Jonker, "Family tree Jonker", database, Genealogy Online (https://www.genealogieonline.nl/jonker_stamboom/I1393.php : accessed February 21, 2026), "Arendina Hermina Johanna Mulder (1915-1957)".
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