The temperature on July 6, 1911 was between 9.9 °C and 25.7 °C and averaged 19.1 °C. There was 13.7 hours of sunshine (83%). The average windspeed was 2 Bft (weak wind) and was prevailing from the north-northeast. Source: KNMI
January 18 » Eugene B. Ely lands on the deck of the USSPennsylvania anchored in San Francisco Bay, the first time an aircraft landed on a ship.
January 26 » Glenn Curtiss flies the first successful American seaplane.
September 25 » An explosion of badly degraded propellant charges on board the French battleship Liberté detonates the forward ammunition magazines and destroys the ship.
December 14 » Roald Amundsen's team, comprising himself, Olav Bjaaland, Helmer Hanssen, Sverre Hassel, and Oscar Wisting, becomes the first to reach the South Pole.
December 27 » "Jana Gana Mana", the national anthem of India, is first sung in the Calcutta Session of the Indian National Congress.
December 29 » Mongolia gains independence from the Qing dynasty, enthroning 8th Jebtsundamba Khutughtu as Khagan of Mongolia.
Day of marriage July 29, 1941
The temperature on July 29, 1941 was between 12.4 °C and 18.5 °C and averaged 15.5 °C. There was 7.7 mm of rain during 5.3 hours. There was -0.1 hours of sunshine (0%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-southwest. Source: KNMI
In The Netherlands , there was from September 3, 1940 to July 27, 1941 the cabinet Gerbrandy I, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
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.
February 5 » World War II: Allied forces begin the Battle of Keren to capture Keren, Eritrea.
February 9 » World War II: The Cathedral of San Lorenzo in Genoa, Italy, is struck by a bomb which fails to detonate.
April 1 » Fântâna Albă massacre: Between 200 and 2,000 Romanian civilians are killed by Soviet Border Troops.
May 1 » World War II: German forces launch a major attack during the siege of Tobruk.
September 5 » Whole territory of Estonia is occupied by Nazi Germany.
October 22 » World War II: French resistance member Guy Môquet and 29 other hostages are executed by the Germans in retaliation for the death of a German officer.
Day of death April 23, 1952
The temperature on April 23, 1952 was between 4.2 °C and 13.7 °C and averaged 9.0 °C. There was 2.9 mm of rain during 1.0 hours. There was 9.0 hours of sunshine (63%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-southwest. Source: KNMI
June 26 » The Pan-Malayan Labour Party is founded in Malaya, as a union of statewide labour parties.
July 21 » The 7.3 Mw Kern County earthquake strikes Southern California with a maximum Mercalli intensity of XI (Extreme), killing 12 and injuring hundreds.
July 26 » King Farouk of Egypt abdicates in favor of his son Fuad.
September 6 » A prototype aircraft crashes at the Farnborough Airshow in Hampshire, England, killing 29 spectators and the two on board.
September 8 » The Canadian Broadcasting Corporation makes its first televised broadcast on the second escape of the Boyd Gang.
November 25 » Korean War: After 42 days of fighting, the Battle of Triangle Hill ends with Chinese victory, American and South Korean units abandon their attempt to capture the "Iron Triangle".
Day of burial April 26, 1952
The temperature on April 26, 1952 was between 4.3 °C and 11.9 °C and averaged 8.1 °C. There was 6.8 hours of sunshine (47%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
May 3 » Lieutenant Colonels Joseph O. Fletcher and William P. Benedict of the United States land a plane at the North Pole.
September 12 » Strange occurrences, including a monster sighting, take place in Flatwoods, West Virginia.
November 25 » Korean War: After 42 days of fighting, the Battle of Triangle Hill ends with Chinese victory, American and South Korean units abandon their attempt to capture the "Iron Triangle".
December 1 » The New York Daily News reports the news of Christine Jorgensen, the first notable case of sex reassignment surgery.
December 24 » First flight of Britain's Handley Page Victor strategic bomber.
December 30 » An RAF Avro Lancaster bomber crashed in Luqa, Malta after an engine failure, killing three crew members and a civilian on the ground.
When copying data from this family tree, please include a reference to the origin: Nico Blesgraaf, "Family tree Blesgraaf", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-blesgraaf/I770.php : accessed January 8, 2026), "Wilhelmus Cornelis "Wim" de Graaff (1911-1952)".
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