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.
July 2 » British-Italian engineer Guglielmo Marconi obtains a patent for radio in London.
September 11 » After months of pursuit, generals of Menelik II of Ethiopia capture Gaki Sherocho, the last king of Kaffa, bringing an end to that ancient kingdom.
September 12 » Tirah Campaign: In the Battle of Saragarhi, ten thousand Pashtun tribesmen suffer several hundred casualties while attacking 21 Sikh soldiers in British service.
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.
December 9 » Activist Marguerite Durand founds the feminist daily newspaper La Fronde in Paris.
Day of marriage May 19, 1916
The temperature on May 19, 1916 was between 6.7 °C and 18.1 °C and averaged 12.6 °C. There was 13.1 hours of sunshine (83%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northwest. Source: KNMI
In The Netherlands , there was from August 29, 1913 to September 9, 1918 the cabinet Cort van der Linden, with Mr. P.W.A. Cort van der Linden (liberaal) as prime minister.
March 8 » World War I: A British force unsuccessfully attempts to relieve the siege of Kut (present-day Iraq) in the Battle of Dujaila.
March 9 » Mexican Revolution: Pancho Villa leads nearly 500 Mexican raiders in an attack against the border town of Columbus, New Mexico.
March 15 » United States President Woodrow Wilson sends 4,800 United States troops over the U.S.–Mexico border to pursue Pancho Villa.
June 1 » Louis Brandeis becomes the first Jew appointed to the United States Supreme Court.
July 15 » In Seattle, Washington, William Boeing and George Conrad Westervelt incorporate Pacific Aero Products (later renamed Boeing).
September 15 » World War I: Tanks are used for the first time in battle, at the Battle of the Somme.
Day of death December 25, 1971
The temperature on December 25, 1971 was between 4.3 °C and 7.7 °C and averaged 6.5 °C. The almost completely overcast was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-southwest. Source: KNMI
February 11 » Cold War: the Seabed Arms Control Treaty opened for signature outlawing nuclear weapons on the ocean floor in international waters.
February 21 » The Convention on Psychotropic Substances is signed at Vienna.
April 19 » Launch of Salyut 1, the first space station.
April 19 » Sierra Leone becomes a republic, and Siaka Stevens the president.
August 27 » An attempted coup d'état fails in the African nation of Chad. The Government of Chad accuses Egypt of playing a role in the attempt and breaks off diplomatic relations.
December 14 » Bangladesh Liberation War: Over 200 of East Pakistan's intellectuals are executed by the Pakistan Army and their local allies. (The date is commemorated in Bangladesh as Martyred Intellectuals Day.)
When copying data from this family tree, please include a reference to the origin: Fokke Post, "Family tree van Fokke Post", database, Genealogy Online (https://www.genealogieonline.nl/stamboom--fokke-post/I643.php : accessed February 12, 2026), "Johanna Jonkers (1897-1971)".
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