1881January 1–24 – Siege of Geok Tepe: Russian troops under General Mikhail Skobelev defeat the Turkomans. January 13 – War of the Pacific – Battle of San Juan and Chorrillos: The Chilean army defeats Peruvian forces. January 15 – War of the Pacific – Battle of Miraflores: The Chileans take Lima, capital of Peru, after defeating its second line of defense in Miraflores.
1973January 1973 January 1 – The United Kingdom, the Republic of Ireland and Denmark enter the European Economic Community, which later becomes the European Union. January 15 – Vietnam War: Citing progress in peace negotiations, U.S. President Richard Nixon announces the suspension of offensive action in North Vietnam. January 17 – Ferdinand Marcos becomes President for Life of the Philippines. January 20 – Richard Nixon is sworn in for a second term as President of the United States.
1887January 11 – Louis Pasteur's anti-rabies treatment is defended in the Académie Nationale de Médecine, by Dr. Joseph Grancher. January 20 The United States Senate allows the Navy to lease Pearl Harbor as a naval base. British emigrant ship Kapunda sinks after a collision off the coast of Brazil, killing 303 with only 16 survivors. January 21 The Amateur Athletic Union (AAU) is formed in the United States. Brisbane receives a one-day rainfall of (a record for any Australian capital city).
1899January 1 Spanish rule ends in Cuba, concluding 400 years of the Spanish Empire in the Americas. Queens and Staten Island become administratively part of New York City. January 2 Bolivia sets up a customs office in Puerto Alonso, leading to the Brazilian settlers there to declare the Republic of Acre in a revolt against Bolivian authorities. The first part of the Jakarta Kota–Anyer Kidul railway on the island of Java is opened between Batavia Zuid (Jakarta Kota) and Tangerang.
1902January 1902 January 1 The Nurses Registration Act 1901 comes into effect in New Zealand, making it the first country in the world to require state registration of nurses. On January 10, Ellen Dougherty becomes the world's first registered nurse. Nathan Stubblefield demonstrates his wireless telephone device in the U.S. state of Kentucky. January 8 – A train collision in the New York Central Railroad's Park Avenue Tunnel kills 17 people, injures 38, and leads to increased demand for electric trains and the banning of steam locomotives in New York City.
1972Within the context of Coordinated Universal Time (UTC) it was the longest year ever, as two leap seconds were added during this 366-day year, an event which has not since been repeated. (If its start and end are defined using mean solar time [the legal time scale], its duration was 31622401.141 seconds of Terrestrial Time (or Ephemeris Time), which is slightly shorter than 1908). January 1972 January 1 – Kurt Waldheim becomes Secretary-General of the United Nations.
1867January 1 – The Covington–Cincinnati Suspension Bridge opens between Cincinnati, Ohio, and Covington, Kentucky, in the United States, becoming the longest single-span bridge in the world. It was renamed after its designer, John A. Roebling, in 1983. January 8 – African-American men are granted the right to vote in the District of Columbia. January 11 – Benito Juárez becomes Mexican president again. January 15 – London Skating Disaster where 40 people died when the ice broke.
1841January 20 – Charles Elliot of the United Kingdom, and Qishan of the Qing dynasty, agree to the Convention of Chuenpi. January 26 – Britain occupies Hong Kong. Later in the year, the first census of the island records a population of about 7,500. January 27 – The active volcano Mount Erebus in Antarctica is discovered, and named by James Clark Ross. January 28 – Ross discovers the "Victoria Barrier", later known as the Ross Ice Shelf. On the same voyage, he discovers the Ross Sea, Victoria Land and Mount Terror.
1831January 1 – William Lloyd Garrison begins publishing The Liberator, an anti-slavery newspaper, in Boston, Massachusetts. January 10 – Japanese department store, Takashimaya in Kyoto established. February–March – Revolts in Modena, Parma and the Papal States are put down by Austrian troops. February 2 – Pope Gregory XVI succeeds Pope Pius VIII, as the 254th pope. February 5 – Dutch naval lieutenant Jan van Speyk blows up his own gunboat in Antwerp rather than strike his colours on the demand of supporters of the Belgian Revolution.