April 30 » J. J. Thomson of the Cavendish Laboratory announces his discovery of the electron as a subatomic particle, over 1,800 times smaller than a proton (in the atomic nucleus), at a lecture at the Royal Institution in London.
June 16 » A treaty annexing the Republic of Hawaii to the United States is signed; the Republic would not be dissolved until a year later.
August 10 » German chemist Felix Hoffmann discovers an improved way of synthesizing acetylsalicylic acid (aspirin).
September 1 » The Tremont Street Subway in Boston opens, becoming the first underground rapid transit system in North America.
November 1 » The first Library of Congress building opens its doors to the public; the library had previously been housed in the Congressional Reading Room in the U.S. Capitol.
December 9 » Activist Marguerite Durand founds the feminist daily newspaper La Fronde in Paris.
Day of marriage May 31, 1924
The temperature on May 31, 1924 was between 9.4 °C and 25.9 °C and averaged 18.0 °C. There was 6.1 mm of rain. There was 9.0 hours of sunshine (55%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south east. Source: KNMI
In The Netherlands , there was from September 19, 1922 to August 4, 1925 the cabinet Ruys de Beerenbrouck II, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
January 22 » Ramsay MacDonald becomes the first Labour Prime Minister of the United Kingdom.
January 25 » The 1924 Winter Olympics opens in Chamonix, in the French Alps, inaugurating the Winter Olympic Games.
February 12 » George Gershwin's Rhapsody in Blue received its premiere in a concert titled "An Experiment in Modern Music", in Aeolian Hall, New York, by Paul Whiteman and his band, with Gershwin playing the piano.
September 9 » Hanapepe massacre occurs on Kauai, Hawaii.
November 23 » Edwin Hubble's discovery, that the Andromeda "nebula" is actually another island galaxy far outside of our own Milky Way, is first published in The New York Times.
December 20 » Adolf Hitler is released from Landsberg Prison.
Day of death January 29, 1991
The temperature on January 29, 1991 was between -4.7 °C and 0.6 °C and averaged -2.0 °C. There was 5.6 hours of sunshine (63%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the east. 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 12 » Persian Gulf War: An act of the U.S. Congress authorizes the use of American military force to drive Iraq out of Kuwait.
February 16 » Nicaraguan Contras leader Enrique Bermúdez is assassinated in Managua.
February 18 » The IRA explodes bombs in the early morning at Paddington station and Victoria station in London.
August 16 » Indian Airlines Flight 257, a Boeing 737-200, crashes during approach to Imphal Airport, killing all 69 people on board.
September 9 » Tajikistan declares independence from the Soviet Union.
December 25 » Mikhail Gorbachev resigns as President of the Soviet Union (the union itself is dissolved the next day). Ukraine's referendum is finalized and Ukraine officially leaves 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/I113635.php : accessed October 24, 2026), "Arend Wilpstra (1897-1991)".
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