January 2 » American statesman and diplomat John Hay announces the Open Door Policy to promote trade with China.
March 7 » The German liner SSKaiser Wilhelm der Grosse becomes the first ship to send wireless signals to shore.
May 26 » Thousand Days' War: The Colombian Conservative Party turns the tide of war in their favor with victory against the Colombian Liberal Party in the Battle of Palonegro.
June 9 » Indian nationalist Birsa Munda dies of cholera in a British prison.
June 14 » The second German Naval Law calls for the Imperial German Navy to be doubled in size, resulting in an Anglo-German naval arms race.
June 25 » The Taoist monk Wang Yuanlu discovers the Dunhuang manuscripts, a cache of ancient texts that are of great historical and religious significance, in the Mogao Caves of Dunhuang, China.
Day of marriage January 21, 1924
The temperature on January 21, 1924 was between -1.6 °C and 3.5 °C and averaged 0.8 °C. There was 0.2 mm of rain. There was 0.8 hours of sunshine (9%). The average windspeed was 2 Bft (weak wind) and was prevailing from the south. 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.
January 22 » Ramsay MacDonald becomes the first Labour Prime Minister of the United Kingdom.
June 26 » The American occupation of the Dominican Republic ends after eight years.
August 4 » Diplomatic relations between Mexico and the Soviet Union are established.
August 28 » The Georgian opposition stages the August Uprising against the Soviet Union.
September 9 » Hanapepe massacre occurs on Kauai, Hawaii.
September 28 » The first aerial circumnavigation is completed by a team from the US Army.
Day of death January 20, 1945
The temperature on January 20, 1945 was between -8.5 °C and 0.9 °C and averaged -3 °C. There was 3.0 mm of rain during 9.3 hours. There was 0.2 hours of sunshine (2%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
In The Netherlands , there was from July 27, 1941 to February 23, 1945 the cabinet Gerbrandy II, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
In The Netherlands , there was from February 23, 1945 to June 24, 1945 the cabinet Gerbrandy III, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
From June 24, 1945 till July 3, 1946 the Netherlands had a cabinet Schermerhorn - Drees with the prime ministers Prof. ir. W. Schermerhorn (VDB) and W. Drees (PvdA).
January 12 » World War II: The Red Army begins the Vistula–Oder Offensive.
February 19 » World War II: Battle of Iwo Jima: About 30,000 United States Marines land on the island of Iwo Jima.
March 11 » World War II: The Empire of Vietnam, a short-lived Japanese puppet state, is established with Bảo Đại as its ruler.
April 20 » Twenty Jewish children used in medical experiments at Neuengamme are killed in the basement of the Bullenhuser Damm school.
April 22 » World War II: Prisoners at the Jasenovac concentration camp revolt. Five hundred twenty are killed and around eighty escape.
October 18 » A group of the Venezuelan Armed Forces, led by Mario Vargas, Marcos Pérez Jiménez and Carlos Delgado Chalbaud, stages a coup d'état against president Isaías Medina Angarita, who is overthrown by the end of the day.
When copying data from this family tree, please include a reference to the origin: Jos van Helvoirt, "Family tree Van Helvoirt Koenders", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-helvoirt-koenders/I503917.php : accessed August 9, 2025), "Petrus van Zoggel III (1900-1945)".
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