February 2 » The Australian Premiers' Conference held in Melbourne decides to locate Australia's capital city, Canberra, between Sydney and Melbourne.
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.
March 4 » Cyclone Mahina sweeps in north of Cooktown, Queensland, with a 12 metres (39ft) wave that reaches up to 5 kilometres (3.1mi) inland, killing over 300.
March 6 » Bayer registers "Aspirin" as a trademark.
July 11 » Fiat founded by Giovanni Agnelli in Turin, Italy.
September 13 » Mackinder, Ollier and Brocherel make the first ascent of Batian (5,199 m - 17,058ft), the highest peak of Mount Kenya.
Day of death April 29, 1921
The temperature on April 29, 1921 was between 5.8 °C and 18.4 °C and averaged 12.6 °C. There was 12.2 hours of sunshine (83%). The average windspeed was 4 Bft (moderate breeze) and was prevailing from the northeast. 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.
February 22 » After Russian forces under Baron Roman von Ungern-Sternberg drive the Chinese out, the Bogd Khan is reinstalled as the emperor of Mongolia.
April 2 » The Autonomous Government of Khorasan, a military government encompassing the modern state of Iran, is established.
August 14 » Tannu Uriankhai, later Tuvan People's Republic is established as a completely independent country (which is supported by Soviet Russia).
October 19 » The Portuguese Prime Minister and several officials are murdered in the Bloody Night coup.
October 29 » The Harvard University football team loses to Centre College, ending a 25-game winning streak. This is considered one of the biggest upsets in college football.
November 11 » The Tomb of the Unknowns is dedicated by US President Warren G. Harding at Arlington National Cemetery.
When copying data from this family tree, please include a reference to the origin: T. de Keizer, "Family tree De Keizer", database, Genealogy Online (https://www.genealogieonline.nl/de-keizer-stamboom/I53.php : accessed March 4, 2026), "Adrianus de Keizer (1899-1921)".
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