The temperature on December 23, 1963 was between -9.0 °C and -3.6 °C and averaged -6.9 °C. There was 6.6 hours of sunshine (85%). The average windspeed was 2 Bft (weak wind) and was prevailing from the east-southeast. Source: KNMI
March 21 » Alcatraz Federal Penitentiary (in California) closes.
April 16 » Dr. Martin Luther King Jr. pens his Letter from Birmingham Jail while incarcerated in Birmingham, Alabama for protesting against segregation.
May 2 » Berthold Seliger launches a rocket with three stages and a maximum flight altitude of more than 100 kilometres near Cuxhaven. It is the only sounding rocket developed in Germany.
May 19 » The New York Post Sunday Magazine publishes Martin Luther King Jr.'s Letter from Birmingham Jail.
July 1 » ZIP codes are introduced for United States mail.
August 24 » Buddhist crisis: As a result of the Xá Lợi Pagoda raids, the US State Department cables the United States Embassy, Saigon to encourage Army of the Republic of Vietnam generals to launch a coup against President Ngô Đình Diệm if he did not remove his brother Ngô Đình Nhu.
When copying data from this family tree, please include a reference to the origin: Michael Jacobs, "Family tree Jacobs", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-michael-jacobs/I63293.php : accessed February 2, 2026), "Wilma Wieldraaier (1963-)".
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