April 30 » Hawaii becomes a territory of the United States, with Sanford B. Dole as governor.
May 24 » Second Boer War: The United Kingdom annexes the Orange Free State.
June 21 » Boxer Rebellion. China formally declares war on the United States, Britain, Germany, France and Japan, as an edict issued from the Empress Dowager Cixi.
July 2 » Jean Sibelius' Finlandia receives its première performance in Helsinki with the Helsinki Philharmonic Society conducted by Robert Kajanus.
October 9 » The Cook Islands become a territory of the United Kingdom.
December 14 » Quantum mechanics: Max Planck presents a theoretical derivation of his black-body radiation law.
Day of death May 20, 1957
The temperature on May 20, 1957 was between 7.0 °C and 15.4 °C and averaged 11.6 °C. There was 0.3 mm of rain during 0.3 hours. There was 8.0 hours of sunshine (50%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-northwest. Source: KNMI
February 22 » Ngô Đình Diệm of South Vietnam survives a communist shooting assassination attempt in Buôn Ma Thuột.
March 8 » Egypt re-opens the Suez Canal after the Suez Crisis.
March 8 » The 1957 Georgia Memorial to Congress, which petitions the U.S. Congress to declare the ratification of the 14th and 15th Amendments to the U.S. Constitution null and void, is adopted by the U.S. state of Georgia.
October 10 » U.S. President Eisenhower apologizes to Ghanaian finance minister Gbedemah after he is refused service in a Delaware restaurant.
November 14 » The "Apalachin Meeting" in rural Tioga County in upstate New York is raided by law enforcement; many high level Mafia figures are arrested while trying to flee.
December 2 » United Nations Security Council Resolution 126 relating to Kashmir conflict is adopted.
When copying data from this family tree, please include a reference to the origin: Peter Keesman, "Family tree Keesman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-keesman/I28291.php : accessed March 3, 2026), "Ida Maria van der Veen (1900-1957)".
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