January 13 » First Italo-Ethiopian War: the war's opening battle, the Battle of Coatit, occurs; it is an Italian victory.
February 24 » Revolution breaks out in Baire, a town near Santiago de Cuba, beginning the Cuban War of Independence, that ends with the Spanish–American War in 1898.
April 8 » In Pollock v. Farmers' Loan & Trust Co. the Supreme Court of the United States declares unapportioned income tax to be unconstitutional.
May 7 » In Saint Petersburg, Russian scientist Alexander Stepanovich Popov demonstrates to the Russian Physical and Chemical Society his invention, the Popov lightning detector—a primitive radio receiver. In some parts of the former Soviet Union the anniversary of this day is celebrated as Radio Day.
September 3 » John Brallier becomes the first openly professional American football player, when he was paid US$10 by David Berry, to play for the Latrobe Athletic Association in a 12-0 win over the Jeanette Athletic Association.
October 21 » The Republic of Formosa collapses as Japanese forces invade.
Day of marriage June 9, 1921
The temperature on June 9, 1921 was between 11.0 °C and 18.2 °C and averaged 13.5 °C. There was 1.2 hours of sunshine (7%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west-northwest. 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.
March 21 » The New Economic Policy is implemented by the Bolshevik Party in response to the economic failure as a result of war communism.
July 10 » Belfast's Bloody Sunday: Sixteen people are killed and 161 houses destroyed during rioting and gun battles in Belfast, Northern Ireland.
September 11 » Nahalal, the first moshav in Palestine, is settled as part of a Zionist plan of creating a Jewish state, later to be Israel.
October 13 » Soviet republics sign the Treaty of Kars to formalize the borders between Turkey and the South Caucasus states.
October 29 » The Link River Dam, a part of the Klamath Reclamation Project, is completed.
November 14 » The Communist Party of Spain is founded, and issues the first edition of Mundo obrero.
Day of death May 12, 1977
The temperature on May 12, 1977 was between 9.1 °C and 15.8 °C and averaged 11.9 °C. There was 16.6 mm of rain during 7.0 hours. There was 5.4 hours of sunshine (35%). The partly or heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
In The Netherlands , there was from Friday, May 11, 1973 to Monday, December 19, 1977 the cabinet Den Uyl, with Drs. J.M. den Uyl (PvdA) as prime minister.
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.
March 10 » Astronomers discover the rings of Uranus.
May 17 » Nolan Bushnell opened the first Chuck E. Cheese's in San Jose, California.
May 25 » The Chinese government removes a decade-old ban on William Shakespeare's work, effectively ending the Cultural Revolution started in 1966.
June 16 » Oracle Corporation is incorporated in Redwood Shores, California, as Software Development Laboratories (SDL), by Larry Ellison, Bob Miner and Ed Oates.
November 26 » An unidentified hijacker named Vrillon, claiming to be the representative of the "Ashtar Galactic Command", takes over Britain's Southern Television for six minutes, starting at 5:12 pm.
December 5 » Egypt breaks diplomatic relations with Syria, Libya, Algeria, Iraq and South Yemen. The move is in retaliation for the Declaration of Tripoli against Egypt.
Day of burial May 17, 1977
The temperature on May 17, 1977 was between 8.7 °C and 18.0 °C and averaged 12.5 °C. There was 5.9 hours of sunshine (37%). The partly clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
In The Netherlands , there was from Friday, May 11, 1973 to Monday, December 19, 1977 the cabinet Den Uyl, with Drs. J.M. den Uyl (PvdA) as prime minister.
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.
When copying data from this family tree, please include a reference to the origin: Ronald van 't Hoff, "Family tree Van 't Hoff - Zondag - Bosch - de Zwaan - vd Kolk - Westhuis - Plomp", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-t-hoff/I6483.php : accessed February 26, 2026), "Willem de Zwaan (1895-1977)".
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