January 17 » The United States takes possession of Wake Island in the Pacific Ocean.
February 6 » Spanish–American War: The Treaty of Paris, a peace treaty between the United States and Spain, is ratified by the United States Senate.
February 14 » Voting machines are approved by the U.S. Congress for use in federal elections.
March 31 » Malolos, capital of the First Philippine Republic, is captured by American forces.
September 13 » Henry Bliss is the first person in the United States to be killed in an automobile accident.
Day of marriage May 29, 1923
The temperature on May 29, 1923 was between 7.6 °C and 17.7 °C and averaged 11.9 °C. There was 9.1 mm of rain. There was 7.1 hours of sunshine (44%). The average windspeed was 2 Bft (weak wind) and was prevailing from the east-southeast. Source: KNMI
In The Netherlands , there was from September 19, 1922 to August 4, 1925 the cabinet Ruys de Beerenbrouck II, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
January 9 » Lithuanian residents of the Memel Territory rebel against the League of Nations' decision to leave the area as a mandated region under French control.
May 26 » The first 24 Hours of Le Mans was held and has since been run annually in June.
June 27 » Capt. Lowell H. Smith and Lt. John P. Richter perform the first ever aerial refueling in a DH.4B biplane.
August 16 » The United Kingdom gives the name "Ross Dependency" to part of its claimed Antarctic territory and makes the Governor-General of the Dominion of New Zealand its administrator.
September 29 » The French Mandate for Syria and the Lebanon takes effect.
October 22 » The royalist Leonardopoulos–Gargalidis coup d'état attempt fails in Greece, discrediting the monarchy and paving the way for the establishment of the Second Hellenic Republic.
Day of death September 14, 1954
The temperature on September 14, 1954 was between 8.2 °C and 17.1 °C and averaged 12.3 °C. There was 9.5 hours of sunshine (74%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
January 2 » India establishes its highest civilian awards, the Bharat Ratna and the Padma Vibhushan.
February 10 » U.S. President Dwight D. Eisenhower warns against United States intervention in Vietnam.
July 5 » Elvis Presley records his first single, "That's All Right", at Sun Records in Memphis, Tennessee.
September 9 » The 6.7 Mw Chlef earthquake shakes northern Algeria with a maximum Mercalli intensity of XI (Extreme). At least 1,243 people were killed and 5,000 were injured.
December 2 » The Sino-American Mutual Defense Treaty, between the United States and Taiwan, is signed in Washington, D.C.
December 23 » First successful kidney transplant is performed by J. Hartwell Harrison and Joseph Murray.
When copying data from this family tree, please include a reference to the origin: Hendrik de Graaf, "Family tree Plugboer", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-plugboer/I4110.php : accessed February 1, 2026), "Petrus Cornelis Keijsper (1899-1954)".
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