January 2 » American statesman and diplomat John Hay announces the Open Door Policy to promote trade with China.
January 16 » The United States Senate accepts the Anglo-German treaty of 1899 in which the United Kingdom renounces its claims to the Samoan islands.
March 14 » The Gold Standard Act is ratified, placing the United States currency on the gold standard.
April 14 » The Exposition Universelle begins.
June 17 » Boxer Rebellion: Western Allied and Japanese forces capture the Taku Forts in Tianjin, China.
September 13 » Filipino insurgents defeat a small American column in the Battle of Pulang Lupa, during the Philippine–American War.
Day of marriage May 31, 1927
The temperature on May 31, 1927 was between 10.6 °C and 23.0 °C and averaged 16.0 °C. There was 1.9 mm of rain. There was 3.4 hours of sunshine (21%). The average windspeed was 2 Bft (weak wind) and was prevailing from the east. Source: KNMI
February 23 » German theoretical physicist Werner Heisenberg writes a letter to fellow physicist Wolfgang Pauli, in which he describes his uncertainty principle for the first time.
April 30 » The Federal Industrial Institute for Women opens in Alderson, West Virginia, as the first women's federal prison in the United States.
August 27 » Five Canadian women file a petition to the Supreme Court of Canada, asking, "Does the word 'Persons' in Section 24 of the British North America Act, 1867, include female persons?"
September 22 » Jack Dempsey loses the "Long Count" boxing match to Gene Tunney.
September 30 » Babe Ruth becomes the first baseball player to hit 60 home runs in a season.
December 3 » Putting Pants on Philip, the first Laurel and Hardy film, is released.
When copying data from this family tree, please include a reference to the origin: F. van Dijk, "Family tree Van Dijk", database, Genealogy Online (https://www.genealogieonline.nl/stamboom_van_dijk/R27825.php : accessed February 19, 2026), "Petronella Antonetta van t' Hof (1900-)".
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