The temperature on February 20, 1911 was between 0.5 °C and 7.1 °C and averaged 3.1 °C. There was 2.7 mm of rain. There was 2.2 hours of sunshine (21%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west-northwest. Source: KNMI
January 14 » Roald Amundsen's South Pole expedition makes landfall on the eastern edge of the Ross Ice Shelf.
April 8 » Dutch physicist Heike Kamerlingh Onnes discovers superconductivity.
June 16 » IBM founded as the Computing-Tabulating-Recording Company in Endicott, New York.
September 18 » Russian Premier Pyotr Stolypin is shot at the Kiev Opera House.
September 20 » The White Star Line's RMSOlympic collides with the British warship HMSHawke.
November 3 » Chevrolet officially enters the automobile market in competition with the Ford Model T.
Day of marriage June 2, 1938
The temperature on June 2, 1938 was between 7.8 °C and 18.0 °C and averaged 12.7 °C. There was 0.1 mm of rain. There was 7.7 hours of sunshine (47%). The average windspeed was 5 Bft (very strong wind) and was prevailing from the south-southwest. Source: KNMI
January 3 » The March of Dimes is established as a foundation to combat infant polio by President Franklin D. Roosevelt.
March 3 » Oil is discovered in Saudi Arabia.
March 12 » Anschluss: German troops occupy and absorb Austria.
June 7 » Second Sino-Japanese War: The Chinese Nationalist government creates the 1938 Yellow River flood to halt Japanese forces. Five hundred to nine hundred thousand civilians are killed.
August 18 » The Thousand Islands Bridge, connecting New York, United States with Ontario, Canada over the Saint Lawrence River, is dedicated by U.S. President Franklin D. Roosevelt.
December 17 » Otto Hahn discovers the nuclear fission of the heavy element uranium, the scientific and technological basis of nuclear energy.
Day of death July 25, 1997
The temperature on July 25, 1997 was between 14.8 °C and 18.9 °C and averaged 16.4 °C. There was 7.1 mm of rain during 4.2 hours. There was 3.2 hours of sunshine (20%). The partly or heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
In The Netherlands , there was from Monday, August 22, 1994 to Monday, August 3, 1998 the cabinet a href="https://nl.wikipedia.org/wiki/Kabinet-Kok_I" class="extern">Kok I, with W. Kok (PvdA) as prime minister.
February 28 » An earthquake in northern Iran is responsible for about 3,000 deaths.
May 19 » The Sierra Gorda biosphere, the most ecologically diverse region in Mexico, is established as a result of grassroots efforts.
July 1 » China resumes sovereignty over the city-state of Hong Kong, ending 156 years of British colonial rule. The handover ceremony is attended by British Prime Minister Tony Blair, Charles, Prince of Wales, Chinese President Jiang Zemin, and U.S. Secretary of State Madeleine Albright.
July 10 » In London, scientists report the findings of the DNA analysis of a Neanderthal skeleton which supports the "out of Africa theory" of human evolution, placing an "African Eve" at 100,000 to 200,000 years ago.
August 29 » Netflix is launched as an internet DVD rental service.
September 6 » The Funeral of Diana, Princess of Wales takes place in London. Well over a million people lined the streets and 2⁄2 billion watched around the world on television.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I167675.php : accessed October 10, 2026), "Halbe Zijlstra (1911-1997)".
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