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 18 » AFC Ajax Amsterdam, The Netherlands's biggest and most successful football club, was founded.
April 2 » The United States Congress passes the Foraker Act, giving Puerto Rico limited self-rule.
June 14 » The second German Naval Law calls for the Imperial German Navy to be doubled in size, resulting in an Anglo-German naval arms race.
July 2 » Jean Sibelius' Finlandia receives its première performance in Helsinki with the Helsinki Philharmonic Society conducted by Robert Kajanus.
July 2 » The first Zeppelin flight takes place on Lake Constance near Friedrichshafen, Germany.
Day of marriage January 29, 1927
The temperature on January 29, 1927 was between 3.2 °C and 7.5 °C and averaged 5.2 °C. There was 7.8 mm of rain. The average windspeed was 6 Bft (strong wind) and was prevailing from the south-southwest. 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.
March 29 » Sunbeam 1000hp breaks the land speed record at Daytona Beach, Florida.
April 12 » Rocksprings, Texas was hit by an F5 tornado that destroyed 235 of the 247 buildings in the town and killed 72 townspeople and injured 205; third deadliest tornado in Texas history.
May 1 » The Union Labor Life Insurance Company is founded by the American Federation of Labor.
May 21 » Charles Lindbergh touches down at Le Bourget Field in Paris, completing the world's first solo nonstop flight across the Atlantic Ocean.
December 11 » Guangzhou Uprising: Communist Red Guards launch an uprising in Guangzhou, China, taking over most of the city and announcing the formation of a Guangzhou Soviet.
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/I135798.php : accessed October 24, 2026), "Martje de Haan (1900-)".
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