January 1 » New York, New York annexes land from surrounding counties, creating the City of Greater New York. The four initial boroughs, Manhattan, Brooklyn, Queens, and The Bronx, are joined on January 25 by Staten Island to create the modern city of five boroughs.
March 16 » In Melbourne the representatives of five colonies adopted a constitution, which would become the basis of the Commonwealth of Australia.
April 20 » U.S. President William McKinley signed a joint resolution to Congress for declaration of war against Spain, beginning the Spanish–American War.
August 13 » Carl Gustav Witt discovers 433 Eros, the first near-Earth asteroid to be found.
November 10 » Beginning of the Wilmington insurrection of 1898, the only instance of a municipal government being overthrown in United States history.
December 26 » Marie and Pierre Curie announce the isolation of radium.
Day of marriage September 9, 1919
The temperature on September 9, 1919 was between 9.9 °C and 21.9 °C and averaged 15.6 °C. There was 8.3 hours of sunshine (63%). The average windspeed was 2 Bft (weak wind) and was prevailing from the south. Source: KNMI
In The Netherlands , there was from September 9, 1918 to September 18, 1922 the cabinet Ruys de Beerenbrouck I, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
January 15 » Rosa Luxemburg and Karl Liebknecht, two of the most prominent socialists in Germany, are tortured and murdered by the Freikorps at the end of the Spartacist uprising.
January 21 » A revolutionary Irish parliament is founded and declares the independence of the Irish Republic. One of the first engagements of the Irish War of Independence takes place.
February 14 » The Polish–Soviet War begins.
October 16 » Adolf Hitler delivers his first public address at a meeting of the German Workers' Party.
December 1 » Lady Astor becomes the first female Member of Parliament to take her seat in the House of Commons of the United Kingdom. (She had been elected to that position on November 28.)
December 23 » Sex Disqualification (Removal) Act 1919 becomes law in the United Kingdom.
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/R912.php : accessed October 24, 2026), "Maria Petronella Johanna Posthuma (1898-????)".
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