January 2 » American statesman and diplomat John Hay announces the Open Door Policy to promote trade with China.
January 31 » Datu Muhammad Salleh is killed in Kampung Teboh, Tambunan, ending the Mat Salleh Rebellion.
February 18 » Second Boer War: Imperial forces suffer their worst single-day loss of life on Bloody Sunday, the first day of the Battle of Paardeberg.
June 9 » Indian nationalist Birsa Munda dies of cholera in a British prison.
July 2 » Jean Sibelius' Finlandia receives its première performance in Helsinki with the Helsinki Philharmonic Society conducted by Robert Kajanus.
October 19 » Max Planck discovers Planck's law of black-body radiation.
Day of marriage August 18, 1927
The temperature on August 18, 1927 was between 9.4 °C and 17.6 °C and averaged 13.8 °C. There was 1.3 mm of rain. There was -0.1 hours of sunshine (0%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south east. Source: KNMI
January 10 » Fritz Lang's futuristic film Metropolis is released in Germany.
January 27 » Ibn Saud takes the title of King of Nejd.
April 30 » The Federal Industrial Institute for Women opens in Alderson, West Virginia, as the first women's federal prison in the United States.
June 29 » The Bird of Paradise, a U.S. Army Air Corps Fokker tri-motor, completes the first transpacific flight, from the mainland United States to Hawaii.
September 7 » The first fully electronic television system is achieved by Philo Farnsworth.
October 4 » Gutzon Borglum begins sculpting Mount Rushmore.
Day of death July 25, 1969
The temperature on July 25, 1969 was between 17.3 °C and 22.6 °C and averaged 19.5 °C. There was 0.1 mm of rain during 0.1 hours. There was 0.2 hours of sunshine (1%). The almost completely overcast was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
May 16 » Venera program: Venera 5, a Soviet space probe, lands on Venus.
July 20 » Apollo program: Apollo 11's crew successfully makes the first manned landing on the Moon in the Sea of Tranquility. Americans Neil Armstrong and Buzz Aldrin become the first humans to walk on the Moon six and a half hours later.
July 25 » Vietnam War: U.S. President Richard Nixon declares the Nixon Doctrine, stating that the United States now expects its Asian allies to take care of their own military defense. This is the start of the "Vietnamization" of the war.
October 1 » Concorde breaks the sound barrier for the first time.
November 15 » Vietnam War: In Washington, D.C., 250,000-500,000 protesters staged a peaceful demonstration against the war, including a symbolic "March Against Death".
November 17 » Cold War: Negotiators from the Soviet Union and the United States meet in Helsinki, Finland to begin SALT I negotiations aimed at limiting the number of strategic weapons on both sides.
When copying data from this family tree, please include a reference to the origin: Jaap Geensen, "Geensen database", database, Genealogy Online (https://www.genealogieonline.nl/geensen-database/I1097.php : accessed December 28, 2025), "Antonie Geensen (1900-1969)".
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