January 2 » American statesman and diplomat John Hay announces the Open Door Policy to promote trade with China.
May 23 » American Civil War: Sergeant William Harvey Carney is awarded the Medal of Honor for his heroism in the Assault on the Battery Wagner in 1863.
June 9 » Indian nationalist Birsa Munda dies of cholera in a British prison.
July 27 » Kaiser Wilhelm II makes a speech comparing Germans to Huns; for years afterwards, "Hun" would be a disparaging name for Germans.
July 29 » In Italy, King Umberto I of Italy is assassinated by the anarchist Gaetano Bresci.
December 14 » Quantum mechanics: Max Planck presents a theoretical derivation of his black-body radiation law.
Day of marriage March 28, 1925
The temperature on March 28, 1925 was between -0.3 °C and 7.6 °C and averaged 3.7 °C. There was 1.9 hours of sunshine (15%). The average windspeed was 4 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.
February 2 » Serum run to Nome: Dog sleds reach Nome, Alaska with diphtheria serum, inspiring the Iditarod race.
June 16 » The most famous Young Pioneer camp of the Soviet Union, Artek, is established.
July 21 » Malcolm Campbell becomes the first man to exceed 150mph (241km/h) on land. At Pendine Sands in Wales, he drives Sunbeam 350HP built by Sunbeam at a two-way average speed of 150.33mph (242km/h).
July 25 » Telegraph Agency of the Soviet Union (TASS) is established.
September 17 » Frida Kahlo suffers near-fatal injuries in a bus accident in Mexico, causing her to abandon her medical studies and take up art.
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.
Day of death May 11, 1950
The temperature on May 11, 1950 was between 9.0 °C and 23.2 °C and averaged 16.1 °C. There was 14.2 hours of sunshine (92%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
From August 7, 1948 till March 15, 1951 the Netherlands had a cabinet Drees - Van Schaik with the prime ministers Dr. W. Drees (PvdA) and Mr. J.R.H. van Schaik (KVP).
January 13 » Finland forms diplomatic relations with the People's Republic of China.
September 11 » Korean War: President Harry S. Truman approved military operations north of the 38 parallel.
October 19 » Iran becomes the first country to accept technical assistance from the United States under the Point Four Program.
October 19 » Korean War: The Battle of Pyongyang ends in a United Nations victory. Hours later, the Chinese Army begins crossing the border into Korea.
November 5 » Korean War: British and Australian forces from the 27th British Commonwealth Brigade successfully halted the advancing Chinese 117th Division during the Battle of Pakchon.
December 17 » The F-86 Sabre's first mission over Korea.
When copying data from this family tree, please include a reference to the origin: J. Ham, "Family tree Ham", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-ham/I9669.php : accessed March 13, 2026), "Trijntje Jongsma (1900-1950)".
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