January 31 » Czechoslav Trade Union Association is founded in Prague.
February 1 » Shinhan Bank, the oldest bank in South Korea, opens in Seoul.
February 28 » Queen Ranavalona III, the last monarch of Madagascar, is deposed by a French military force.
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.
September 1 » The Tremont Street Subway in Boston opens, becoming the first underground rapid transit system in North America.
December 30 » The British Colony of Natal annexes Zululand.
Day of marriage September 25, 1920
The temperature on September 25, 1920 was between 10.8 °C and 15.8 °C and averaged 13.7 °C. There was 0.1 mm of rain. The average windspeed was 2 Bft (weak wind) and was prevailing from the southwest. 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.
February 10 » About 75% of the population in Zone I votes to join Denmark in the 1920 Schleswig plebiscites.
May 9 » Polish–Soviet War: The Polish army under General Edward Rydz-Śmigły celebrates its capture of Kiev with a victory parade on Khreshchatyk.
August 25 » Polish–Soviet War: Battle of Warsaw, which began on August 13, ends with the Red Army's defeat.
October 25 » After 74 days on hunger strike in Brixton Prison, England, the Sinn Féin Lord Mayor of Cork, Terence MacSwiney dies.
November 28 » FIDAC (The Interallied Federation of War Veterans Organisations), the first international organization of war veterans is established in Paris, France
December 24 » Gabriele D'Annunzio surrendered the Italian Regency of Carnaro in the city of Fiume to Italian armed forces.
Day of death June 4, 1966
The temperature on June 4, 1966 was between 8.2 °C and 26.1 °C and averaged 18.2 °C. There was 10.4 hours of sunshine (63%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the south-southwest. Source: KNMI
February 23 » In Syria, Ba'ath Party member Salah Jadid leads an intra-party military coup that replaces the previous government of General Amin al-Hafiz, also a Baathist.
April 26 » A new government is formed in the Republic of the Congo, led by Ambroise Noumazalaye.
July 24 » Michael Pelkey makes the first BASE jump from El Capitan along with Brian Schubert. Both came out with broken bones. BASE jumping has now been banned from El Cap.
August 10 » The Heron Road Bridge collapses while being built, killing nine workers in the deadliest construction accident in both Ottawa and Ontario.
August 29 » The Beatles perform their last concert before paying fans at Candlestick Park in San Francisco.
October 10 » The Beach Boys release one of their biggest singles, ranked the 6th greatest song by Rolling Stone, "Good Vibrations".
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/I82028.php : accessed February 10, 2026), "Tjerk Mulder (1897-1966)".
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