1920January 1920 January 1 Polish–Soviet War in 1920: The Russian Red Army increases its troops along the Polish border from 4 divisions to 20. Kauniainen, completely surrounded by the city of Espoo, secedes from Espoo as its own market town. January 3 – The 1920 Xalapa earthquake in Mexico kills over 600 people, making it the second deadliest in the country. January 7 – Russian Civil War: The forces of Russian White Admiral Alexander Kolchak surrender in Krasnoyarsk; the Great Siberian Ice March ensues.
1921January 1921 January 2 The Association football club Cruzeiro Esporte Clube, from Belo Horizonte, is founded as the multi-sports club Palestra Italia by Italian expatriates in Brazil. The Spanish liner Santa Isabel breaks in two and sinks off Villa Garcia, Mexico, with the loss of 244 of the 300 people on board. January 16 – The Marxist Left in Slovakia and the Transcarpathian Ukraine holds its founding congress in Ľubochňa. January 17 – The first recorded public performance of the illusion of "sawing a woman in half" is given by English stage magician P.
1927January 1927 January 1 – The British Broadcasting Company becomes the British Broadcasting Corporation, when its Royal Charter of incorporation takes effect. John Reith becomes the first Director-General. January 7 The first transatlantic telephone call is made via radio from New York City, United States, to London, United Kingdom. The Harlem Globetrotters exhibition basketball team play their first ever road game in Hinckley, Illinois. January 9 – The Laurier Palace Theatre fire at a movie theatre in Montreal, Quebec, Canada, kills 78 children.
1970January 1970 January 1 – Unix time epoch reached at 00:00:00 UTC. January 5 – The 7.1 Tonghai earthquake shakes Tonghai County, Yunnan province, China, with a maximum Mercalli intensity of X (Extreme). Between 10,000 and 14,621 are killed and 26,783 injured. January 14 – Biafra capitulates, ending the Nigerian Civil War. January 15 – After a 32-month fight for independence from Nigeria, Biafran forces under Philip Effiong formally surrender to General Yakubu Gowon.
1919January 1919 January 1 The Czechoslovak Legions occupy much of the self-proclaimed "free city" of Pressburg (now Bratislava), enforcing its incorporation into the new republic of Czechoslovakia. HMY Iolaire sinks off the coast of the Hebrides; 201 people, mostly servicemen returning home to Lewis and Harris, are killed. January 2–22 – Russian Civil War: The Red Army's Caspian-Caucasian Front begins the Northern Caucasus Operation against the White Army, but fails to make progress.
1915Below, the events of World War I have the "WWI" prefix. January 1915 January – British physicist Sir Joseph Larmor publishes his observations on "The Influence of Local Atmospheric Cooling on Astronomical Refraction". January 1 WWI: British Royal Navy battleship HMS Formidable is sunk off Lyme Regis, Dorset, England, by an Imperial German Navy U-boat, with the loss of 547 crew. Battle of Broken Hill: A train ambush near Broken Hill, Australia, is carried out by two men (claiming to be in support of the Ottoman Empire) who are killed, together with four civilians.
20002000 was designated as the International Year for the Culture of Peace and the World Mathematical Year. Popular culture holds the year 2000 as the first year of the 21st century and the 3rd millennium, because of a tendency to group the years according to decimal values, as if non-existent year zero were counted. According to the Gregorian calendar, these distinctions fall to the year 2001, because the 1st century was retroactively said to start with the year AD 1.
