The temperature on April 21, 1912 was between 6.8 °C and 20.2 °C and averaged 14.4 °C. There was 12.8 hours of sunshine (90%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-northeast. Source: KNMI
January 6 » German geophysicist Alfred Wegener first presents his theory of continental drift.
March 12 » The Girl Guides (later renamed the Girl Scouts of the USA) are founded in the United States.
May 4 » Italy occupies the Greek island of Rhodes.
July 30 » Japan's Emperor Meiji dies and is succeeded by his son Yoshihito, who is now known as the Emperor Taishō.
September 28 » The Ulster Covenant is signed by some 500,000 Ulster Protestant Unionists in opposition to the Third Irish Home Rule Bill.
December 16 » First Balkan War: The Royal Hellenic Navy defeats the Ottoman Navy at the Battle of Elli.
Day of marriage November 5, 1938
The temperature on November 5, 1938 was between 12.3 °C and 14.3 °C and averaged 13.1 °C. There was 0.9 mm of rain during 1.4 hours. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
June 7 » Second Sino-Japanese War: The Chinese Nationalist government creates the 1938 Yellow River flood to halt Japanese forces. Five hundred to nine hundred thousand civilians are killed.
June 23 » The Civil Aeronautics Act is signed into law, forming the Civil Aeronautics Authority in the United States.
September 5 » Chile: A group of youths affiliated with the fascist National Socialist Movement of Chile are executed after surrendering during a failed coup.
October 1 » Germany annexes the Sudetenland.
October 5 » In Nazi Germany, Jews' passports are invalidated.
December 16 » Adolf Hitler institutes the Cross of Honour of the German Mother.
Day of death February 12, 1952
The temperature on February 12, 1952 was between -3.0 °C and 4.8 °C and averaged -0.1 °C. There was 0.5 mm of rain during 1.0 hours. There was 5.2 hours of sunshine (53%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the west-southwest. Source: KNMI
January 14 » NBC's long-running morning news program Today debuts, with host Dave Garroway.
February 26 » Vincent Massey is sworn in as the first Canadian-born Governor General of Canada.
June 26 » The Pan-Malayan Labour Party is founded in Malaya, as a union of statewide labour parties.
July 23 » General Muhammad Naguib leads the Free Officers Movement (formed by Gamal Abdel Nasser, the real power behind the coup) in overthrowing King Farouk of Egypt.
October 3 » The United Kingdom successfully tests a nuclear weapon to become the world's third nuclear power.
November 1 » Nuclear weapons testing: The United States successfully detonates Ivy Mike, the first thermonuclear device, at the Eniwetok atoll. The explosion had a yield of ten megatons TNT equivalent.
When copying data from this family tree, please include a reference to the origin: Jo IJzerman, "Family tree IJzerman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-ijzerman/I2495.php : accessed February 16, 2026), "Hendrikje Dijkslag (1912-1952)".
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