The temperature on September 25, 1881 was about 14.9 °C. The air pressure was 3 kgf/m2 and came mainly from the south-southeast. The airpressure was 77 cm mercury. The atmospheric humidity was 65%. Source: KNMI
In The Netherlands , there was from August 20, 1879 to April 23, 1883 the cabinet Van Lijnden van Sandenburg, with Mr. C.Th. baron Van Lijnden van Sandenburg (conservatief-AR) as prime minister.
January 25 » Thomas Edison and Alexander Graham Bell form the Oriental Telephone Company.
March 13 » Alexander II of Russia is assassinated.
April 11 » Spelman College is founded in Atlanta, Georgia as the Atlanta Baptist Female Seminary, an institute of higher education for African-American women.
May 10 » Carol I is crowned the King of the Romanian Kingdom.
July 1 » General Order 70, the culmination of the Cardwell and Childers reforms of the British Army, comes into effect.
July 14 » Billy the Kid is shot and killed by Pat Garrett outside Fort Sumner.
Day of marriage May 12, 1910
The temperature on May 12, 1910 was between 7.9 °C and 20.6 °C and averaged 14.2 °C. There was 13.0 hours of sunshine (84%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the east-southeast. Source: KNMI
March 3 » Rockefeller Foundation: John D. Rockefeller Jr. announces his retirement from managing his businesses so that he can devote all his time to philanthropy.
May 11 » An act of the U.S. Congress establishes Glacier National Park in Montana.
June 19 » The first Father's Day is celebrated in Spokane, Washington.
July 15 » In his book Clinical Psychiatry, Emil Kraepelin gives a name to Alzheimer's disease, naming it after his colleague Alois Alzheimer.
August 22 » Korea is annexed by Japan with the signing of the Japan–Korea Treaty of 1910, beginning a period of Japanese rule of Korea that lasted until the end of World War II.
October 6 » Eleftherios Venizelos is elected prime minister of Greece for the first of seven times.
Day of death January 5, 1941
The temperature on January 5, 1941 was between -6.2 °C and -3.3 °C and averaged -5.2 °C. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-northeast. Source: KNMI
In The Netherlands , there was from September 3, 1940 to July 27, 1941 the cabinet Gerbrandy I, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
In The Netherlands , there was from July 27, 1941 to February 23, 1945 the cabinet Gerbrandy II, with Prof. dr. P.S. Gerbrandy (ARP) as prime minister.
March 17 » In Washington, D.C., the National Gallery of Art is officially opened by President Franklin D. Roosevelt.
June 8 » World War II: The Allies commence the Syria-Lebanon Campaign against the possessions of Vichy France in the Levant.
July 26 » World War II: In response to the Japanese occupation of French Indochina, the United States, Britain and the Netherlands freeze all Japanese assets and cut off oil shipments.
September 1 » The Nazis execute 2,500 Jews by shooting in Ostroh, Ukraine.
September 30 » World War II: The Babi Yar massacre comes to an end.
December 21 » World War II: A formal treaty of alliance between Thailand and Japan is signed in the presence of the Emerald Buddha in Wat Phra Kaew, Thailand.
When copying data from this family tree, please include a reference to the origin: Sim Mostert, "Genealogy Pot en Smit", database, Genealogy Online (https://www.genealogieonline.nl/genealogie_pot_smit/I3749.php : accessed September 28, 2026), "WILLEM IVO OPSTELTEN (1881-1941)".
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