April 30 » J. J. Thomson of the Cavendish Laboratory announces his discovery of the electron as a subatomic particle, over 1,800 times smaller than a proton (in the atomic nucleus), at a lecture at the Royal Institution in London.
May 26 » Dracula, a Gothic horror novel by Irish author Bram Stoker, is published.
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.
August 2 » Anglo-Afghan War: The Siege of Malakand ends when a relief column is able to reach the British garrison in the Malakand states.
December 9 » Activist Marguerite Durand founds the feminist daily newspaper La Fronde in Paris.
December 30 » The British Colony of Natal annexes Zululand.
Day of marriage September 6, 1919
The temperature on September 6, 1919 was between 12.6 °C and 27.0 °C and averaged 17.7 °C. There was 8.0 hours of sunshine (60%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-southeast. 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 8 » Edward George Honey proposes the idea of a moment of silence to commemorate the Armistice of 11 November 1918 which ended World War I.
June 14 » John Alcock and Arthur Whitten Brown depart from St. John's, Newfoundland on the first nonstop transatlantic flight.
August 8 » The Anglo-Afghan Treaty of 1919 is signed. It establishes peaceful relations between Afghanistan and the UK, and confirms the Durand line as the mutual border. In return, the UK is no longer obligated to subsidize the Afghan government.
September 11 » United States Marine Corps invades Honduras.
November 11 » Latvian forces defeat the West Russian Volunteer Army at Riga in the Latvian War of Independence.
December 17 » Uruguay becomes a signatory to the Buenos Aires copyright treaty.
Day of death September 12, 1925
The temperature on September 12, 1925 was between 6.4 °C and 17.9 °C and averaged 11.8 °C. There was 1.3 mm of rain. There was 7.8 hours of sunshine (60%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north. Source: KNMI
In The Netherlands , there was from September 19, 1922 to August 4, 1925 the cabinet Ruys de Beerenbrouck II, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
In The Netherlands , there was from August 4, 1925 to March 8, 1926 the cabinet Colijn I, with Dr. H. Colijn (ARP) as prime minister.
May 1 » The All-China Federation of Trade Unions is officially founded. Today it is the largest trade union in the world, with 134million members.
May 14 » Virginia Woolf's novel Mrs Dalloway is published.
July 21 » Scopes Trial: In Dayton, Tennessee, high school biology teacher John T. Scopes is found guilty of teaching human evolution in class and fined $100.
August 9 » A train robbery takes place in Kakori, near Lucknow, India.
September 8 » Rif War: Spanish forces including troops from the Foreign Legion under Colonel Francisco Franco landing at Al Hoceima, Morocco.
November 5 » Secret agent Sidney Reilly, the first "super-spy" of the 20th century, is executed by the OGPU, the secret police of the Soviet Union.
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/I186649.php : accessed October 16, 2026), "Grietje Wiersma (1897-1925)".
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