March 7 » The German liner SSKaiser Wilhelm der Grosse becomes the first ship to send wireless signals to shore.
April 2 » The United States Congress passes the Foraker Act, giving Puerto Rico limited self-rule.
April 5 » Archaeologists in Knossos, Crete, discover a large cache of clay tablets with hieroglyphic writing in a script they call Linear B.
May 17 » Second Boer War: British troops relieve Mafeking.
June 20 » Baron Eduard Toll, leader of the Russian Polar Expedition of 1900, departs Saint Petersburg in Russia on the explorer ship Zarya, never to return.
October 9 » The Cook Islands become a territory of the United Kingdom.
Day of marriage March 13, 1925
The temperature on March 13, 1925 was between -7.4 °C and 5.4 °C and averaged 1.1 °C. There was 4.4 mm of rain. There was 4.9 hours of sunshine (42%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west-southwest. 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.
In The Netherlands , there was from August 4, 1925 to March 8, 1926 the cabinet Colijn I, with Dr. H. Colijn (ARP) as prime minister.
March 21 » The Butler Act prohibits the teaching of human evolution in Tennessee.
April 16 » During the Communist St Nedelya Church assault in Sofia, Bulgaria, 150 are killed and 500 are wounded.
April 26 » Paul von Hindenburg defeats Wilhelm Marx in the second round of the German presidential election to become the first directly elected head of state of the Weimar Republic.
May 1 » The All-China Federation of Trade Unions is officially founded. Today it is the largest trade union in the world, with 134million members.
July 18 » Adolf Hitler publishes Mein Kampf.
December 11 » Roman Catholic papal encyclical Quas primas introduces the Feast of Christ the King.
Day of death June 9, 1967
The temperature on June 9, 1967 was between 7.3 °C and 15.9 °C and averaged 11.4 °C. There was 0.3 mm of rain during 0.8 hours. There was 9.1 hours of sunshine (55%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the north-northwest. Source: KNMI
March 18 » The supertanker Torrey Canyon runs aground off the Cornish coast.
November 2 » Vietnam War: US President Lyndon B. Johnson and "The Wise Men" conclude that the American people should be given more optimistic reports on the progress of the war.
November 3 » Vietnam War: The Battle of Dak To begins.
November 14 » American physicist Theodore Maiman is given a patent for his ruby laser systems, the world's first laser.
December 20 » A Pennsylvania Railroad Budd Metroliner exceeds 155mph on their New York Division, also present day Amtrak's Northeast Corridor.
December 21 » Louis Washkansky, the first man to undergo a human-to-human heart transplant, dies in Cape Town, South Africa, having lived for 18 days after the transplant.
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/I7496.php : accessed February 20, 2026), "Johanna Margaretha Wittenbernds (1900-1967)".
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