April 25 » Spanish–American War: The United States declares war on Spain.
June 27 » The first solo circumnavigation of the globe is completed by Joshua Slocum from Briar Island, Nova Scotia.
August 23 » The Southern Cross Expedition, the first British venture of the Heroic Age of Antarctic Exploration, departs from London.
September 13 » Hannibal Goodwin patents celluloid photographic film.
September 18 » The Fashoda Incident triggers the last war scare between Britain and France.
October 6 » Phi Mu Alpha Sinfonia, the largest American music fraternity, is founded at the New England Conservatory of Music.
Day of marriage September 10, 1930
The temperature on September 10, 1930 was between 11.0 °C and 21.1 °C and averaged 15.6 °C. There was 4.9 hours of sunshine (38%). The average windspeed was 2 Bft (weak wind) and was prevailing from the east-southeast. Source: KNMI
In The Netherlands , there was from August 10, 1929 to May 26, 1933 the cabinet Ruys de Beerenbrouck III, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
April 28 » The Independence Producers hosted the first night game in the history of Organized Baseball in Independence, Kansas.
May 1 » "Pluto" is officially proposed for the name of the newly-discovered dwarf planet Pluto by Vesto Slipher in the Lowell Observatory Observation Circular. The name quickly catches on.
June 16 » Sovnarkom establishes decree time in the USSR.
June 17 » U.S. President Herbert Hoover signs the Smoot–Hawley Tariff Act into law.
July 30 » In Montevideo, Uruguay wins the first FIFA World Cup.
December 29 » Sir Muhammad Iqbal's presidential address in Allahabad introduces the two-nation theory and outlines a vision for the creation of Pakistan.
Day of death May 6, 1980
The temperature on May 6, 1980 was between 3.2 °C and 16.9 °C and averaged 10.0 °C. There was 0.6 mm of rain during 0.4 hours. There was 5.9 hours of sunshine (39%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the 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.
April 2 » United States President Jimmy Carter signs the Crude Oil Windfall Profits Tax Act.
May 20 » In a referendum in Quebec, the population rejects, by 60% of the vote, a government proposal to move towards independence from Canada.
June 3 » An explosive device is detonated at the Statue of Liberty. The FBI suspects Croatian nationalists.
August 27 » A massive bomb planted by extortionist John Birges explodes at Harvey's Resort Hotel in Stateline, Nevada after a failed disarming attempt by the FBI. Although the hotel is damaged, no one is injured.
November 23 » The 6.9 Mw Irpinia earthquake shakes southern Italy with a maximum Mercalli intensity of X (Extreme), killing 2,483–4,900, and injuring 7,700–8,934.
December 2 » Salvadoran Civil War: Four American missionaries are raped and murdered by a death squad.
When copying data from this family tree, please include a reference to the origin: Ferry Posthuma Scholtes, "Family tree Posthuma", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-posthuma/R801.php : accessed December 26, 2025), "Catharina Maria Havik (1898-1980)".
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