January 23 » The Malolos Constitution is inaugurated, establishing the First Philippine Republic. Emilio Aguinaldo is sworn in as its first President.
March 30 » German Society of Chemistry issues an invitation to other national scientific organizations to appoint delegates to the International Committee on Atomic Weights.
May 8 » The Irish Literary Theatre in Dublin produced its first play.
June 7 » American Temperance crusader Carrie Nation begins her campaign of vandalizing alcohol-serving establishments by destroying the inventory in a saloon in Kiowa, Kansas.
July 11 » Fiat founded by Giovanni Agnelli in Turin, Italy.
December 2 » Philippine–American War: The Battle of Tirad Pass, termed "The Filipino Thermopylae", is fought.
Day of marriage December 15, 1927
The temperature on December 15, 1927 was between -7.6 °C and -0.2 °C and averaged -3.1 °C. There was 1.3 mm of rain. There was 4.4 hours of sunshine (57%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the east-northeast. Source: KNMI
January 1 » New Mexican oil legislation goes into effect, leading to the formal outbreak of the Cristero War.
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.
May 26 » The last Ford Model T rolls off the assembly line after a production run of 15,007,003 vehicles.
October 25 » The Italian luxury liner SS Principessa Mafalda sinks off the coast of Brazil, killing 314.
November 13 » The Holland Tunnel opens to traffic as the first Hudson River vehicle tunnel linking New Jersey to New York City.
December 30 » The Ginza Line, the first subway line in Asia, opens in Tokyo, Japan.
Day of death June 9, 1952
The temperature on June 9, 1952 was between 8.3 °C and 17.8 °C and averaged 12.5 °C. There was 0.6 mm of rain during 2.0 hours. There was 4.2 hours of sunshine (25%). The partly or heavily clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the east-northeast. Source: KNMI
When copying data from this family tree, please include a reference to the origin: Elly Gelderman, "Family tree Gelderman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-gelderman/I14560.php : accessed February 6, 2026), "Hermanus Frederik Borgman (1899-1952)".
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