January 31 » Czechoslav Trade Union Association is founded in Prague.
February 28 » Queen Ranavalona III, the last monarch of Madagascar, is deposed by a French military force.
June 16 » A treaty annexing the Republic of Hawaii to the United States is signed; the Republic would not be dissolved until a year later.
July 2 » British-Italian engineer Guglielmo Marconi obtains a patent for radio in London.
July 26 » Anglo-Afghan War: The Pashtun fakir Saidullah leads an army of more than 10,000 to begin a siege of the British garrison in the Malakand Agency of the North West Frontier Province of India.
December 30 » The British Colony of Natal annexes Zululand.
Day of marriage December 6, 1930
The temperature on December 6, 1930 was between -1.4 °C and 0.9 °C and averaged -0.1 °C. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-southwest. Source: KNMI
In The Netherlands , there was from August 10, 1929 to May 26, 1933 the cabinet Ruys de Beerenbrouck III, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
March 29 » Heinrich Brüning is appointed German Reichskanzler.
April 22 » The United Kingdom, Japan and the United States sign the London Naval Treaty regulating submarine warfare and limiting shipbuilding.
May 7 » The 7.1 Mw Salmas earthquake shakes northwestern Iran and southeastern Turkey with a maximum Mercalli intensity of IX (Violent). Up to three-thousand people were killed.
June 16 » Sovnarkom establishes decree time in the USSR.
September 17 » The Kurdish Ararat rebellion is suppressed by the Turks.
September 27 » Bobby Jones wins the (pre-Masters) Grand Slam of golf.
Day of death May 21, 1990
The temperature on May 21, 1990 was between 9.0 °C and 21.3 °C and averaged 14.8 °C. There was 9.4 hours of sunshine (59%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
In The Netherlands , there was from Tuesday, November 7, 1989 to Monday, August 22, 1994 the cabinet Lubbers III, with Drs. R.F.M. Lubbers (CDA) as prime minister.
January 18 » Washington, D.C. Mayor Marion Barry is arrested for drug possession in an FBI sting.
March 18 » In the largest art theft in US history, 12 paintings, collectively worth around $500million, are stolen from the Isabella Stewart Gardner Museum in Boston.
August 2 » Iraq invades Kuwait, eventually leading to the Gulf War.
September 16 » The railroad between the People's Republic of China and Kazakhstan is completed at Dostyk, adding a sizable link to the concept of the Eurasian Land Bridge.
October 28 » Georgia holds its only free election under Soviet rule.
December 22 » Final independence of Marshall Islands and Federated States of Micronesia after termination of trusteeship.
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/I34555.php : accessed March 16, 2026), "Geertje van Velzen (1897-1990)".
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