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
April 29 » Tsinghua University, one of mainland China's leading universities, is founded.
May 21 » President of Mexico Porfirio Díaz and the revolutionary Francisco Madero sign the Treaty of Ciudad Juárez to put an end to the fighting between the forces of both men, concluding the initial phase of the Mexican Revolution.
May 31 » The RMS Titanic is launched in Belfast, Northern Ireland.
August 21 » The Mona Lisa is stolen by Vincenzo Peruggia, a Louvre employee.
October 13 » Prince Arthur, Duke of Connaught and Strathearn, becomes the first Governor General of Canada of royal descent.
November 17 » Omega Psi Phi fraternity was founded on the campus of Howard University in Washington, D.C.
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
February 11 » BBC Television produces the world's first ever science fiction television programme, an adaptation of a section of the Karel Čapek play R.U.R., that coined the term "robot".
March 12 » Anschluss: German troops occupy and absorb Austria.
July 20 » The United States Department of Justice files suit in New York City against the motion picture industry charging violations of the Sherman Antitrust Act in regards to the studio system. The case would eventually result in a break-up of the industry in 1948.
September 5 » Chile: A group of youths affiliated with the fascist National Socialist Movement of Chile are executed after surrendering during a failed coup.
October 14 » The first flight of the Curtiss P-40 Warhawk fighter plane.
December 16 » Adolf Hitler institutes the Cross of Honour of the German Mother.
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 7 » NeXT merges with Apple Computer, starting the path to Mac OS X.
March 9 » Comet Hale–Bopp: Observers in China, Mongolia and eastern Siberia are treated to a rare double feature as an eclipse permits Hale-Bopp to be seen during the day.
June 2 » In Denver, Timothy McVeigh is convicted on 15 counts of murder and conspiracy for his role in the 1995 bombing of the Alfred P. Murrah Federal Building in Oklahoma City, in which 168 people died. He was executed four years later.
July 20 » The fully restored USSConstitution (a.k.a. Old Ironsides) celebrates its 200th birthday by setting sail for the first time in 116 years.
July 22 » The second Blue Water Bridge opens between Port Huron, Michigan and Sarnia, Ontario.
August 20 » Souhane massacre in Algeria; over 60 people are killed and 15 kidnapped.
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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