The temperature on July 27, 1906 was between 13.9 °C and 24.0 °C and averaged 18.4 °C. There was 1.6 mm of rain. There was 1.4 hours of sunshine (9%). The average windspeed was 2 Bft (weak wind) and was prevailing from the east-southeast. Source: KNMI
In The Netherlands , there was from August 17, 1905 to February 11, 1908 the cabinet De Meester, with Mr. Th. de Meester (unie-liberaal) as prime minister.
February 10 » HMSDreadnought, the first of a revolutionary new breed of battleships is christened and launched by King Edward VII.
April 7 » Mount Vesuvius erupts and devastates Naples.
June 7 » Cunard Line's RMSLusitania is launched from the John Brown Shipyard, Glasgow (Clydebank), Scotland.
June 25 » Pittsburgh, Pennsylvania millionaire Harry Thaw shoots and kills prominent architect Stanford White.
September 30 » The Royal Galician Academy, the Galician language's biggest linguistic authority, starts working in La Coruña, Spain.
December 30 » The All-India Muslim League is founded in Dacca, East Bengal, British India (later Dhaka, Bangladesh).
Day of marriage February 1, 1938
The temperature on February 1, 1938 was between 4.3 °C and 9.3 °C and averaged 6.1 °C. There was 2.5 mm of rain during 2.0 hours. There was 4.6 hours of sunshine (51%). The average windspeed was 6 Bft (strong wind) and was prevailing from the southwest. Source: KNMI
March 12 » Anschluss: German troops occupy and absorb Austria.
March 18 » Mexico creates Pemex by expropriating all foreign-owned oil reserves and facilities.
June 23 » The Civil Aeronautics Act is signed into law, forming the Civil Aeronautics Authority in the United States.
June 25 » Dr. Douglas Hyde is inaugurated as the first President of Ireland.
July 10 » Howard Hughes begins a 91-hour airplane flight around the world that will set a new record.
Day of death June 20, 1971
The temperature on June 20, 1971 was between 9.1 °C and 14.2 °C and averaged 12.2 °C. There was 12.2 mm of rain during 10.4 hours. The almost completely overcast was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
February 27 » Doctors in the first Dutch abortion clinic (the Mildredhuis in Arnhem) start performing artificially-induced abortions.
March 26 » East Pakistan declares its independence from Pakistan to form Bangladesh and the Bangladesh Liberation War begins.
May 13 » Over 900 unarmed Bengali Hindus are murdered in the Demra massacre.
October 25 » The People's Republic of China replaces the Republic of China at the United Nations.
November 6 » The United States Atomic Energy Commission tests the largest U.S. underground hydrogen bomb, code-named Cannikin, on Amchitka Island in the Aleutians.
December 16 » The United Kingdom recognizes Bahrain's independence, which is commemorated annually as Bahrain's National Day.
When copying data from this family tree, please include a reference to the origin: Elly Gelderman, "Family tree Gelderman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-gelderman/I4998.php : accessed February 23, 2026), "Hendrik Jan Hellendoorn (1906-1971)".
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