In The Netherlands , there was from August 20, 1879 to April 23, 1883 the cabinet Van Lijnden van Sandenburg, with Mr. C.Th. baron Van Lijnden van Sandenburg (conservatief-AR) as prime minister.
In The Netherlands , there was from April 23, 1884 to April 21, 1888 the cabinet Heemskerk, with Mr. J. Heemskerk Azn. (conservatief) as prime minister.
March 20 » The Paris Convention for the Protection of Industrial Property is signed.
May 24 » The Brooklyn Bridge in New York City is opened to traffic after 14 years of construction.
September 8 » The Northern Pacific Railway (reporting mark NP) was completed in a ceremony at Gold Creek, Montana. Former president Ulysses S. Grant drove in the final "golden spike" in an event attended by rail and political luminaries.
November 9 » The 90th Winnipeg Battalion of Rifles, (later the Royal Winnipeg Rifles) of the Canadian Armed Forces is founded.
November 18 » American and Canadian railroads institute five standard continental time zones, ending the confusion of thousands of local times.
December 16 » Tonkin Campaign: French forces capture the Sơn Tây citadel.
Day of marriage March 15, 1921
The temperature on March 15, 1921 was between 1.0 °C and 12.4 °C and averaged 7.1 °C. There was 6.2 hours of sunshine (53%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-southwest. Source: KNMI
In The Netherlands , there was from September 9, 1918 to September 18, 1922 the cabinet Ruys de Beerenbrouck I, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
January 20 » The British K-class submarine HMS K5 sinks in the English Channel; all 56 on board die.
April 11 » Emir Abdullah establishes the first centralised government in the newly created British protectorate of Transjordan.
August 28 » The Red Army dissolved the Free Territory, after driving the Black Army out of Ukraine.
October 18 » The Crimean Autonomous Soviet Socialist Republic is formed as part of the Russian Soviet Federative Socialist Republic.
October 21 » President Warren G. Harding delivers the first speech by a sitting U.S. President against lynching in the deep South.
October 29 » The Link River Dam, a part of the Klamath Reclamation Project, is completed.
Day of death August 12, 1968
The temperature on August 12, 1968 was between 11.4 °C and 20.6 °C and averaged 16.2 °C. There was 9.1 hours of sunshine (61%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the northwest. Source: KNMI
January 7 » Surveyor Program: Surveyor 7, the last spacecraft in the Surveyor series, lifts off from launch complex 36A, Cape Canaveral.
January 23 » USS Pueblo (AGER-2) is attacked and seized by naval forces of North Korea.
April 7 » Motor racing world champion Jim Clark is killed in an accident during a Formula Two race at Hockenheim.
May 30 » Charles de Gaulle reappears publicly after his flight to Baden-Baden, Germany, and dissolves the French National Assembly by a radio appeal. Immediately after, less than one million of his supporters march on the Champs-Élysées in Paris. This is the turning point of May 1968 events in France.
October 22 » Apollo program: Apollo 7 safely splashes down in the Atlantic Ocean after orbiting the Earth 163 times.
November 5 » Richard Nixon is elected as 37th President of the United States.
When copying data from this family tree, please include a reference to the origin: Sim Mostert, "Genealogy Pot en Smit", database, Genealogy Online (https://www.genealogieonline.nl/genealogie_pot_smit/I527.php : accessed October 14, 2026), "HENDRIKUS JOHANNES KOOPMAN (1883-1968)".
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