The temperature on March 20, 1904 was between 1.5 °C and 11.6 °C and averaged 7.3 °C. There was 1.2 hours of sunshine (10%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south-southwest. Source: KNMI
January 8 » The Blackstone Library is dedicated, marking the beginning of the Chicago Public Library system.
February 28 » S.L. Benfica is founded in Portugal.
May 4 » The United States begins construction of the Panama Canal.
May 9 » The steam locomotive City of Truro becomes the first steam engine in Europe to exceed 100mph (160km/h).
May 10 » The Horch & Cir. Motorwagenwerke AG is founded. It would eventually become the Audi company.
December 6 » Theodore Roosevelt articulated his "Corollary" to the Monroe Doctrine, stating that the U.S. would intervene in the Western Hemisphere should Latin American governments prove incapable or unstable.
Day of marriage May 15, 1926
The temperature on May 15, 1926 was between 5.9 °C and 9.9 °C and averaged 7.5 °C. There was 4.3 mm of rain. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
January 8 » Abdul-Aziz ibn Saud is crowned King of Hejaz.
January 8 » Crown Prince Nguyễn Phúc Vĩnh Thuỵ ascends the throne to become the last monarch of Vietnam.
April 24 » The Treaty of Berlin is signed. Germany and the Soviet Union each pledge neutrality in the event of an attack on the other by a third party for the next five years.
June 23 » The College Board administers the first SAT exam.
August 20 » Japan's public broadcasting company, Nippon Hōsō Kyōkai (NHK) is established.
September 25 » The international Convention to Suppress the Slave Trade and Slavery is first signed.
Day of death August 20, 1978
The temperature on August 20, 1978 was between 12.2 °C and 26.8 °C and averaged 18.5 °C. There was 11.5 hours of sunshine (80%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the south-southeast. Source: KNMI
In The Netherlands , there was from Monday, December 19, 1977 to Friday, September 11, 1981 the cabinet Van Agt I, with Mr. A.A.M. van Agt (CDA/KVP) as prime minister.
February 16 » The first computer bulletin board system is created (CBBS in Chicago).
May 12 » In Zaire, rebels occupy the city of Kolwezi, the mining center of the province of Shaba (now known as Katanga); the local government asks the US, France and Belgium to restore order.
May 25 » The first of a series of bombings orchestrated by the Unabomber detonates at Northwestern University resulting in minor injuries.
July 10 » President Moktar Ould Daddah of Mauritania is ousted in a bloodless coup d'état.
September 5 » Camp David Accords: Menachem Begin and Anwar Sadat begin peace discussions at Camp David, Maryland.
December 27 » Spain becomes a democracy after 40 years of fascist dictatorship.
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/I113567.php : accessed October 24, 2026), "Klaaske Groen (1904-1978)".
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