The temperature on July 23, 1911 was between 14.7 °C and 25.0 °C and averaged 19.8 °C. There was 11.4 hours of sunshine (71%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
July 4 » A massive heat wave strikes the northeastern United States, killing 380 people in eleven days and breaking temperature records in several cities.
August 21 » The Mona Lisa is stolen by Vincenzo Peruggia, a Louvre employee.
August 24 » Manuel de Arriaga is elected and sworn-in as the first President of Portugal.
November 11 » Many cities in the Midwestern United States break their record highs and lows on the same day as a strong cold front rolls through.
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 24 » Lackawanna Cut-Off railway line opens in New Jersey and Pennsylvania.
Day of marriage May 20, 1936
The temperature on May 20, 1936 was between 8.4 °C and 19.1 °C and averaged 13.2 °C. There was 12.2 hours of sunshine (77%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the north-northeast. Source: KNMI
January 29 » The first inductees into the Baseball Hall of Fame are announced.
February 10 » Second Italo-Abyssinian War: Italian troops launched the Battle of Amba Aradam against Ethiopian defenders.
May 5 » Italian troops occupy Addis Ababa, Ethiopia.
August 4 » Prime Minister of Greece Ioannis Metaxas suspends parliament and the Constitution and establishes the 4th of August Regime.
December 10 » Abdication Crisis: Edward VIII signs the Instrument of Abdication.
December 23 » Colombia becomes a signatory to the Buenos Aires copyright treaty.
Day of death March 1, 1991
The temperature on March 1, 1991 was between 0.7 °C and 8.6 °C and averaged 4.1 °C. There was 2.9 mm of rain during 4.0 hours. There was 2.0 hours of sunshine (18%). The almost completely overcast was. The average windspeed was 1 Bft (weak wind) and was prevailing from the east-northeast. Source: KNMI
In The Netherlands , there was from Tuesday, November 7, 1989 to Monday, August 22, 1994 the cabinet Lubbers III, with Drs. R.F.M. Lubbers (CDA) as prime minister.
January 9 » Representatives from the United States and Iraq meet at the Geneva Peace Conference to try to find a peaceful resolution to the Iraqi invasion of Kuwait.
May 24 » Israel conducts Operation Solomon, evacuating Ethiopian Jews to Israel.
May 31 » Bicesse Accords in Angola lay out a transition to multi-party democracy under the supervision of the United Nations' UNAVEM II mission.
July 10 » Boris Yeltsin takes office as the first elected President of Russia.
November 26 » National Assembly of Azerbaijan abolishes the autonomous status of Nagorno-Karabakh Autonomous Oblast of Azerbaijan and renames several cities back to their original names.
December 2 » Canada and Poland become the first nations to recognize the independence of Ukraine from the Soviet Union.
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/I131388.php : accessed January 5, 2026), "Johannes Potstra (1911-1991)".
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