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 21 » The first Monte Carlo Rally takes place.
May 9 » The works of Gabriele D'Annunzio are placed in the Index of Forbidden Books by the Vatican.
August 21 » The Mona Lisa is stolen by Vincenzo Peruggia, a Louvre employee.
September 25 » An explosion of badly degraded propellant charges on board the French battleship Liberté detonates the forward ammunition magazines and destroys the ship.
November 17 » Omega Psi Phi fraternity was founded on the campus of Howard University in Washington, D.C.
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.
January 28 » Franco-Thai War: Final air battle of the conflict. A Japanese-mediated armistice goes into effect later in the day.
June 26 » World War II: Soviet planes bomb Kassa, Hungary (now Košice, Slovakia), giving Hungary the impetus to declare war the next day.
July 6 » The German army launches its offensive to encircle several Soviet armies near Smolensk.
July 10 » Jedwabne pogrom: Massacre of Polish Jews living in and near the village of Jedwabne.
July 20 » Soviet leader Joseph Stalin consolidates the Commissariats of Home Affairs and National Security to form the NKVD and names Lavrentiy Beria its chief.
December 9 » World War II: China, Cuba, Guatemala, and the Philippine Commonwealth declare war on Germany and Japan.
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
April 8 » U.S. President Harry Truman calls for the seizure of all domestic steel mills in an attempt to prevent the 1952 steel strike.
April 28 » The Sino-Japanese Peace Treaty (Treaty of Taipei) is signed in Taipei, Taiwan between Japan and the Republic of China to officially end the Second Sino-Japanese War.
May 7 » The concept of the integrated circuit, the basis for all modern computers, is first published by Geoffrey Dummer.
July 7 » The ocean liner SSUnited States passes Bishop Rock on her maiden voyage, breaking the transatlantic speed record to become the fastest passenger ship in the world.
September 6 » A prototype aircraft crashes at the Farnborough Airshow in Hampshire, England, killing 29 spectators and the two on board.
September 19 » The United States bars Charlie Chaplin from re-entering the country after a trip to England.
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
February 21 » The Bengali Language Movement protests occur at the University of Dhaka in East Pakistan (now Bangladesh).
April 28 » Dwight D. Eisenhower resigns as Supreme Allied Commander of NATO.
July 7 » The ocean liner SSUnited States passes Bishop Rock on her maiden voyage, breaking the transatlantic speed record to become the fastest passenger ship in the world.
August 12 » The Night of the Murdered Poets: Thirteen prominent Jewish intellectuals are murdered in Moscow, Russia, Soviet Union.
November 4 » The United States government establishes the National Security Agency, or NSA.
November 25 » Agatha Christie's murder-mystery play The Mousetrap opens at the Ambassadors Theatre in London. It will become the longest continuously-running play in history.
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 February 25, 2026), "Wilhelmus Cornelis "Wim" de Graaff (1911-1952)".
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