The temperature on April 5, 1910 was between 2.5 °C and 13.9 °C and averaged 8.5 °C. There was 10.0 hours of sunshine (76%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-southeast. Source: KNMI
January 13 » The first public radio broadcast takes place; a live performance of the operas Cavalleria rusticana and Pagliacci are sent out over the airwaves from the Metropolitan Opera House in New York.
January 15 » Construction ends on the Buffalo Bill Dam in Wyoming, United States, which was the highest dam in the world at the time, at 325ft (99m).
July 15 » In his book Clinical Psychiatry, Emil Kraepelin gives a name to Alzheimer's disease, naming it after his colleague Alois Alzheimer.
August 29 » The Japan–Korea Treaty of 1910, also known as the Japan–Korea Annexation Treaty, becomes effective, officially starting the period of Japanese rule in Korea.
October 1 » A large bomb destroys the Los Angeles Times building, killing 21.
November 10 » The date of Thomas A. Davis' opening of the San Diego Army and Navy Academy, although the official founding date is November 23, 1910.
Day of marriage October 22, 1942
The temperature on October 22, 1942 was between 6.4 °C and 14.2 °C and averaged 12.0 °C. There was 4.8 mm of rain during 7.5 hours. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the 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.
January 1 » The Declaration by United Nations is signed by twenty-six nations.
February 1 » World War II: Josef Terboven, Reichskommissar of German-occupied Norway, appoints Vidkun Quisling the Minister President of the National Government.
February 9 » World War II: Top United States military leaders hold their first formal meeting to discuss American military strategy in the war.
March 12 » The Battle of Java ends with the surrender of the American-British-Dutch-Australian Command to the Japanese Empire in Bandung, West Java, Dutch East Indies.
June 4 » World War II: The Battle of Midway begins. The Japanese Admiral Chūichi Nagumo orders a strike on Midway Island by much of the Imperial Japanese Navy.
July 1 » World War II: First Battle of El Alamein.
Day of death March 15, 1971
The temperature on March 15, 1971 was between 2.0 °C and 9.4 °C and averaged 6.0 °C. There was 1.3 mm of rain during 3.2 hours. There was 6.6 hours of sunshine (56%). The partly or heavily clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south-southwest. Source: KNMI
When copying data from this family tree, please include a reference to the origin: Wicher Dam, "Dambomen, negen verschillende stambomen DAM", database, Genealogy Online (https://www.genealogieonline.nl/dambomen/I22592.php : accessed January 14, 2026), "Jan Ritsema (1910-1971)".
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