The temperature on February 18, 1911 was between 7.7 °C and 9.9 °C and averaged 9.4 °C. The average windspeed was 6 Bft (strong wind) and was prevailing from the west-southwest. Source: KNMI
April 8 » Dutch physicist Heike Kamerlingh Onnes discovers superconductivity.
May 19 » Parks Canada, the world's first national park service, is established as the Dominion Parks Branch under the Department of the Interior.
May 30 » At the Indianapolis Motor Speedway, the first Indianapolis 500 ends with Ray Harroun in his Marmon Wasp becoming the first winner of the 500-mile auto race.
July 4 » A massive heat wave strikes the northeastern United States, killing 380 people in eleven days and breaking temperature records in several cities.
October 9 » An accidental bomb explosion triggers the Wuchang Uprising against the Chinese monarchy.
December 27 » "Jana Gana Mana", the national anthem of India, is first sung in the Calcutta Session of the Indian National Congress.
Day of marriage May 20, 1939
The temperature on May 20, 1939 was between 1.7 °C and 15.8 °C and averaged 9.1 °C. There was 12.2 hours of sunshine (77%). The average windspeed was 2 Bft (weak wind) and was prevailing from the north. Source: KNMI
In The Netherlands , there was from June 24, 1937 to July 25, 1939 the cabinet Colijn IV, with Dr. H. Colijn (ARP) as prime minister.
In The Netherlands , there was from July 25, 1939 to August 10, 1939 the cabinet Colijn V, with Dr. H. Colijn (ARP) as prime minister.
In The Netherlands , there was from August 10, 1939 to September 3, 1940 the cabinet De Geer II, with Jonkheer mr. D.J. de Geer (CHU) as prime minister.
May 3 » The All India Forward Bloc is formed by Netaji Subhas Chandra Bose.
May 21 » The Canadian National War Memorial is unveiled by King George VI and Queen Elizabeth in Ottawa, Ontario, Canada.
August 15 » Twenty-six Junkers Ju 87 bombers commanded by Walter Sigel meet unexpected ground fog during a dive-bombing demonstration for Luftwaffe generals at Neuhammer. Thirteen of them crash and burn.
September 18 » World War II: The radio show Germany Calling begins transmitting Nazi propaganda.
September 22 » World War II: A joint German–Soviet military parade in Brest-Litovsk is held to celebrate the successful invasion of Poland.
December 24 » World War II: Pope Pius XII makes a Christmas Eve appeal for peace.
Day of death February 23, 1979
The temperature on February 23, 1979 was between -0.3 °C and 3.7 °C and averaged 1.7 °C. There was 3.4 mm of rain during 2.7 hours. There was -0.1 hours of sunshine (0%). The heavily clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the northwest. Source: KNMI
In The Netherlands , there was from Monday, December 19, 1977 to Friday, September 11, 1981 the cabinet Van Agt I, with Mr. A.A.M. van Agt (CDA/KVP) as prime minister.
January 16 » The last Iranian Shah flees Iran with his family for good and relocates to Egypt.
May 25 » American Airlines Flight 191: A McDonnell Douglas DC-10 crashes during takeoff at O'Hare International Airport, Chicago, killing all 271 on board and two people on the ground.
July 25 » In accord with the Egypt–Israel Peace Treaty, Israel begins its withdrawal from the Sinai Peninsula.
October 15 » Supporters of the Malta Labour Party ransack and destroy the Times of Malta building and other locations associated with the Nationalist Party.
October 27 » Saint Vincent and the Grenadines gains its independence from the United Kingdom.
December 23 » Soviet–Afghan War: Soviet Union forces occupy Kabul, the Afghan capital.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I112928.php : accessed February 12, 2026), "Ids van der Ploeg (1911-1979)".
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