The temperature on April 19, 1947 was between 5.3 °C and 15.4 °C and averaged 10.1 °C. There was 2.8 hours of sunshine (20%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
January 1 » The Canadian Citizenship Act 1946 comes into effect, converting British subjects into Canadian citizens. Prime Minister William Lyon Mackenzie King becomes the first Canadian citizen.
February 21 » In New York City, Edwin Land demonstrates the first "instant camera", the Polaroid Land Camera, to a meeting of the Optical Society of America.
February 23 » International Organization for Standardization is founded.
May 3 » New post-war Japanese constitution goes into effect.
August 14 » Pakistan gains Independence from the British Empire and joins the Commonwealth of Nations.
November 25 » Red Scare: The "Hollywood Ten" are blacklisted by Hollywood movie studios.
Day of marriage December 19, 1969
The temperature on December 19, 1969 was between -7.9 °C and -2.7 °C and averaged -5.3 °C. There was 4.5 hours of sunshine (58%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the east-northeast. Source: KNMI
February 4 » Yasser Arafat takes over as chairman of the Palestine Liberation Organization.
April 5 » Vietnam War: Massive antiwar demonstrations occur in many U.S. cities.
May 9 » Carlos Lamarca leads the first urban guerrilla action against the military dictatorship of Brazil in São Paulo, by robbing two banks.
June 28 » Stonewall riots begin in New York City, marking the start of the Gay Rights Movement.
August 4 » Vietnam War: At the apartment of French intermediary Jean Sainteny in Paris, American representative Henry Kissinger and North Vietnamese representative Xuân Thuỷ begin secret peace negotiations. The negotiations will eventually fail.
November 20 » Vietnam War: The Plain Dealer (Cleveland, Ohio) publishes explicit photographs of dead villagers from the My Lai Massacre in Vietnam.
When copying data from this family tree, please include a reference to the origin: H.L. Witmer, "Family tree Witmer", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-witmer/I129.php : accessed January 27, 2026), "Sijtske "Sietske" Hansma (1947-2022)".
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