The temperature on May 16, 1911 was between 6.7 °C and 20.5 °C and averaged 15.0 °C. There was 7.8 hours of sunshine (50%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
April 29 » Tsinghua University, one of mainland China's leading universities, is founded.
May 19 » Parks Canada, the world's first national park service, is established as the Dominion Parks Branch under the Department of the Interior.
June 22 » Mexican Revolution: Government forces bring an end to the Magonista rebellion of 1911 in the Second Battle of Tijuana.
September 1 » The armored cruiser Georgios Averof is commissioned into the Greek Navy. It now serves as a museum ship.
October 9 » An accidental bomb explosion triggers the Wuchang Uprising against the Chinese monarchy.
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.
Day of marriage June 23, 1937
The temperature on June 23, 1937 was between 9.5 °C and 21.3 °C and averaged 15.2 °C. There was 14.0 hours of sunshine (84%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northwest. Source: KNMI
May 27 » In California, the Golden Gate Bridge opens to pedestrian traffic, creating a vital link between San Francisco and Marin County, California.
May 28 » Volkswagen, the German automobile manufacturer is founded.
July 2 » Amelia Earhart and navigator Fred Noonan are last heard from over the Pacific Ocean while attempting to make the first equatorial round-the-world flight.
July 6 » Spanish Civil War: Battle of Brunete: The battle begins with Spanish Republican troops going on the offensive against the Nationalists to relieve pressure on Madrid.
October 11 » The Duke and Duchess of Windsor tour Nazi Germany for 12 days and meet Adolf Hitler on the 22nd.
December 22 » The Lincoln Tunnel opens to traffic in New York City.
Day of death November 19, 1983
The temperature on November 19, 1983 was between 4.1 °C and 7.9 °C and averaged 5.9 °C. There was 1.0 mm of rain during 0.9 hours. The almost completely overcast was. The average windspeed was 1 Bft (weak wind) and was prevailing from the south-southwest. Source: KNMI
In The Netherlands , there was from Thursday, November 4, 1982 to Monday, July 14, 1986 the cabinet Lubbers I, with Drs. R.F.M. Lubbers (CDA) as prime minister.
January 27 » The pilot shaft of the Seikan Tunnel, the world's longest sub-aqueous tunnel (53.85km) between the Japanese islands of Honshū and Hokkaidō, breaks through.
March 11 » Bob Hawke is appointed Prime Minister of Australia.
March 11 » Pakistan successfully conducts a cold test of a nuclear weapon.
May 17 » Lebanon, Israel, and the United States sign an agreement on Israeli withdrawal from Lebanon.
September 1 » Cold War: Korean Air Lines Flight 007 is shot down by a Soviet Union jet fighter when the commercial aircraft enters Soviet airspace, killing all 269 on board, including Congressman Lawrence McDonald.
November 8 » TAAG Angola Airlines Flight 462 crashes after takeoff from Lubango Airport killing all 130 people on board. UNITA claims to have shot down the aircraft, though this is disputed.
When copying data from this family tree, please include a reference to the origin: J. Ham, "Family tree Ham", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-ham/I4179.php : accessed February 6, 2026), "Wilhelmus Opdam (1911-1983)".
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