April 18 » The Greco-Turkish War is declared between Greece and the Ottoman Empire.
May 26 » The original manuscript of William Bradford's history, "Of Plymouth Plantation" is returned to the Governor of Massachusetts by the Bishop of London after being taken during the American Revolutionary War.
June 22 » British colonial officers Charles Walter Rand and Lt. Charles Egerton Ayerst are assassinated in Pune, Maharashtra, India by the Chapekar brothers and Mahadeo Vinayak Ranade, who are later caught and hanged.
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.
November 1 » The first Library of Congress building opens its doors to the public; the library had previously been housed in the Congressional Reading Room in the U.S. Capitol.
Day of marriage April 30, 1921
The temperature on April 30, 1921 was between 6.8 °C and 20.2 °C and averaged 13.7 °C. There was 12.0 hours of sunshine (81%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northeast. 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.
May 3 » West Virginia becomes the first state to legislate a broad sales tax, but does not implement it until a number of years later due to enforcement issues.
July 2 » World War I: U.S. President Warren G. Harding signs the Knox–Porter Resolution formally ending the war between the United States and Germany.
July 11 » The Red Army captures Mongolia from the White Army and establishes the Mongolian People's Republic.
July 22 » Rif War: The Spanish Army suffers its worst military defeat in modern times to the Berbers of the Rif region of Spanish Morocco.
July 29 » Adolf Hitler becomes leader of the National Socialist German Workers Party.
October 19 » The Portuguese Prime Minister and several officials are murdered in the Bloody Night coup.
Day of death September 2, 1980
The temperature on September 2, 1980 was between 7.3 °C and 20.5 °C and averaged 14.1 °C. There was -0.1 mm of rain. There was 10.5 hours of sunshine (77%). The partly clouded was. The average windspeed was 1 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 25 » The government of Suriname is overthrown by a military coup led by Dési Bouterse.
April 24 » Eight U.S. servicemen die in Operation Eagle Claw as they attempt to end the Iran hostage crisis.
May 17 » General Chun Doo-hwan of South Korea seizes control of the government and declares martial law in order to suppress student demonstrations.
May 27 » The Gwangju Massacre: Airborne and army troops of South Korea retake the city of Gwangju from civil militias, killing at least 207 and possibly many more.
July 24 » The Quietly Confident Quartet of Australia wins the men's 4 x 100 metre medley relay at the Moscow Olympics, the only time the United States has not won the event at Olympic level.
September 17 » After weeks of strikes at the Lenin Shipyard in Gdańsk, Poland, the nationwide independent trade union Solidarity is established.
When copying data from this family tree, please include a reference to the origin: Hendrik Dreyer, "Dreyer Tree", database, Genealogy Online (https://www.genealogieonline.nl/dreyer-tree/I18762.php : accessed January 24, 2026), "Roelof Jacobus Coertze (1897-1980)".
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