January 12 » The National Trust is founded in the United Kingdom.
March 22 » Before the Société pour L'Encouragement à l'Industrie, brothers Auguste and Louis Lumière demonstrate movie film technology publicly for the first time.
April 3 » The trial in the libel case brought by Oscar Wilde begins, eventually resulting in his imprisonment on charges of homosexuality.
May 25 » The Republic of Formosa is formed, with Tang Jingsong as its president.
September 3 » John Brallier becomes the first openly professional American football player, when he was paid US$10 by David Berry, to play for the Latrobe Athletic Association in a 12-0 win over the Jeanette Athletic Association.
December 28 » The Lumière brothers perform for their first paying audience at the Grand Cafe in Boulevard des Capucines.
Day of marriage September 15, 1920
The temperature on September 15, 1920 was between 7.0 °C and 15.2 °C and averaged 12.9 °C. There was 2.6 mm of rain. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-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 9 » Under the terms of the Svalbard Treaty, international diplomacy recognizes Norwegian sovereignty over Arctic archipelago Svalbard, and designates it as demilitarized.
April 28 » Azerbaijan is added to the Soviet Union.
May 16 » In Rome, Pope Benedict XV canonizes Joan of Arc.
June 4 » Hungary loses 71% of its territory and 63% of its population when the Treaty of Trianon is signed in Paris.
August 13 » Polish–Soviet War: The Battle of Warsaw begins and will last till August 25. The Red Army is defeated.
November 28 » Irish War of Independence: Kilmichael Ambush: The Irish Republican Army ambush a convoy of British Auxiliaries and kill seventeen.
Day of death May 20, 1983
The temperature on May 20, 1983 was between 7.1 °C and 17.0 °C and averaged 11.7 °C. There was 9.1 mm of rain during 6.5 hours. There was 6.1 hours of sunshine (38%). The heavily clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the south-southeast. Source: KNMI
In The Netherlands , there was from Thursday, November 4, 1982 to Monday, July 14, 1986 the cabinet Lubbers I, with Drs. R.F.M. Lubbers (CDA) as prime minister.
February 28 » The final episode of M*A*S*H airs, with almost 106 million viewers. It still holds the record for the highest viewership of a season finale.
July 25 » Black July: Thirty-seven Tamil political prisoners at the Welikada high security prison in Colombo are massacred by the fellow Sinhalese prisoners.
September 26 » Soviet Air Force officer Stanislav Petrov identifies a report of an incoming nuclear missile as a computer error and not an American first strike.
October 12 » Japan's former Prime Minister Tanaka Kakuei is found guilty of taking a $2 million bribe from the Lockheed Corporation, and is sentenced to four years in jail.
October 13 » Ameritech Mobile Communications launches the first US cellular network in Chicago.
November 5 » Byford Dolphin diving bell accident kills five and leaves one severely injured.
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The Family tree Wallenburg publication was prepared by W. Wallenburg (contact is not possible).
When copying data from this family tree, please include a reference to the origin: W. Wallenburg, "Family tree Wallenburg", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-wallenburg/I557.php : accessed February 27, 2026), "Gerritje van Manen (1895-1983)".
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