January 2 » American statesman and diplomat John Hay announces the Open Door Policy to promote trade with China.
February 7 » A Chinese immigrant in San Francisco falls ill to bubonic plague in the first plague epidemic in the continental United States.
March 16 » Sir Arthur Evans purchased the land around the ruins of Knossos, the largest Bronze Age archaeological site on Crete.
March 18 » AFC Ajax Amsterdam, The Netherlands's biggest and most successful football club, was founded.
June 5 » Second Boer War: British soldiers take Pretoria.
December 14 » Quantum mechanics: Max Planck presents a theoretical derivation of his black-body radiation law.
Day of death April 13, 1981
The temperature on April 13, 1981 was between 4.2 °C and 14.8 °C and averaged 9.8 °C. There was 2.9 hours of sunshine (21%). The partly or heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the north-northeast. 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.
In The Netherlands , there was from Friday, September 11, 1981 to Saturday, May 29, 1982 the cabinet Van Agt II, with Mr. A.A.M. van Agt (CDA) as prime minister.
January 1 » Greece is admitted into the European Community.
January 28 » Ronald Reagan lifts remaining domestic petroleum price and allocation controls in the United States helping to end the 1979 energy crisis and begin the 1980s oil glut.
May 5 » Bobby Sands dies in the Long Kesh prison hospital after 66 days of hunger-striking, aged 27.
August 22 » Far Eastern Air Transport Flight 103 disintegrates in mid-air and crashes in Sanyi Township, Miaoli County, Taiwan. All 110 people on board are killed.
October 6 » Egyptian President Anwar Sadat is murdered by Islamic extremists.
December 31 » A coup d'état in Ghana removes President Hilla Limann's PNP government and replaces it with the Provisional National Defence Council led by Flight lieutenant Jerry Rawlings.
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/I77546.php : accessed September 30, 2026), "Sipke van der Wal (1900-1981)".
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