January 15: This Day That Year
- 1535 - England: Henry VIII declares himself head of the Church.
- 1559 - Elizabeth I crowned Queen of England.
- 1870 - US: Donkey first used as symbol of Democratic Party, in Harper's Weekly.
- 1902 - Abdulaziz Ibn Saud leads 40 men over the walls of Riyadh and takes the city to mark it as a third Saudi State.
- 1919 - US: Two million gallons of molasses flood Boston (Massachusetts) drowning 21 and injuring 150.
- 1934 - 8.4 magnitude earthquake hit India/Nepal, killed 10,700+ people.
- 1970 - Muammar Gaddafi is proclaimed premier of Libya.
- 1976 - USSR performs nuclear test at Eastern Kazakh/Semipalitinsk.
- 1988 - India: Kiran More (Indian Wicketkeeper) banks a World Test record by stumping 6 West Indies batsmen at Madras (now Chennai). Narendra Hirwani takes 16 wicket for 136 (8-61 & 8-75) on his Test debut.
- 2001 - Wikipedia a free content encyclopedia launched by Jimmy Wales and Larry Sanger. - 2009 - US: Chesley Sullenberger lands US Airways Flight 1549 on the Hudson River after takeoff from LaGuardia Airport in NYC. All passengers and crew members survived.
- 2011 - Wikipedia turned 10 years old and remained ad-free.
- 2013 - Syria: 83 people killed and 150 injured in a rocket attack on Aleppo University. - 2013 - Egypt: 19 Egyptian Army recruits killed and 120 injured in a train accident in Giza - 2016 - Burkina Faso: Islamist militants attack a hotel in Ouagadougou, killing 28, injuring 56. - 2019 - India: Beginning the Kumbh Mela (Hindu festival) with 15 million people bathing at the joining of Ganges and Yamuna rivers. 120+ million people expected to visit over next 49 days.
- 2019 - A witness in El Chapo trial claims former Mexican President Enrique Peña Nieto accepted $100 million bribe from the drug cartel head.
- 2019 - Kenya: Bomb blast and gunfight at DusitD2 hotel in Nairobi, killed 21.
- 2019 - According to a report by the World Economic Forum plastic will outweigh fish in the world's oceans by 2050 with current trends.