The temperature on July 11, 1955 was between 16.2 °C and 26.0 °C and averaged 21.2 °C. There was 8.3 hours of sunshine (50%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
April 3 » The American Civil Liberties Union announces it will defend Allen Ginsberg's book Howl against obscenity charges.
April 7 » Winston Churchill resigns as Prime Minister of the United Kingdom amid indications of failing health.
April 12 » The polio vaccine, developed by Dr. Jonas Salk, is declared safe and effective.
April 18 » Twenty-nine nations meet at Bandung, Indonesia, for the first Asian-African Conference.
August 17 » Hurricane Diane made landfall near Wilmington, North Carolina, and it went on to cause major floods and kill more than 184 people.
August 20 » Battle of Philippeville: In Morocco, a force of Berbers from the Atlas Mountains region of Algeria raid two rural settlements and kill 77 French nationals.
When copying data from this family tree, please include a reference to the origin: Hans Opperman, "Family tree Opperman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-opperman/I4047.php : accessed March 3, 2026), "Johannes Gerardus Siepkes (-1955)".
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