640 – Pope John IV is elected, several months Sede vacante.
759 – Tang dynasty poet Du Fu departs for Chengdu, where he is hosted by fellow poet Pei Di.
971 – Battle of Ayn Shams: The Fatimids under Jawhar defeat the Qarmatians at the gates of Cairo, putting an end to the First Qarmatian invasion of Egypt.
1737 – The Marathas defeat the combined forces of the Mughal Empire, Jaipur State, Nizam of Hyderabad, Nawab of Awadh and Nawab of Bengal in the Battle of Bhopal.
1906 – Reginald Fessenden transmits the first radio broadcast; consisting of a poetry reading, a violin solo, and a speech.
1913 – The Italian Hall disaster in Calumet, Michigan results in the deaths of 73 striking workers families at a Christmas party participants (including 59 children) when someone falsely yells "fire".
1952 – First flight of Britain's Handley Page Victor strategic bomber.
1953 – Tangiwai disaster: In New Zealand's North Island, at Tangiwai, a railway bridge is damaged by a lahar and collapses beneath a passenger train, killing 151 people.
1955 – A flood devastates California, killing 74 people across portions of the state.
1964 – Vietnam War: Viet Cong operatives bomb the Brinks Hotel in Saigon, South Vietnam to demonstrate they can strike an American installation in the heavily guarded capital.
1964 – Flying Tiger Line Flight 282 crashes after takeoff from San Francisco International Airport, killing three.
1966 – A Canadair CL-44 chartered by the United States military crashes into a small village in South Vietnam, killing 111.
1968 – Apollo program: The crew of Apollo 8 enters into orbit around the Moon, becoming the first humans to do so. They performed ten , took the Earthrise photograph, broadcast live TV pictures, and read the first ten verses of Genesis.
1983 – Aeroflot Flight 601 crashes during takeoff from Leshukonskoye Airport, Russia, killing 44 of the 49 people on board.
1994 – Air France Flight 8969 is hijacked on the ground at Houari Boumediene Airport, Algiers, Algeria. Over the course of three days three passengers are killed, as are all four terrorists.
1996 – A Learjet 35 crashes into Smarts Mountain near Dorchester, New Hampshire, killing both pilots on board.
1997 – The Sid El-Antri massacre in Algeria kills between 50 and 100 people.
1999 – Indian Airlines Flight 814 is hijacked in Indian airspace between Kathmandu, Nepal, and Delhi, India. The aircraft landed at Kandahar in Afghanistan. The incident ended on December 31 with the release of 190 survivors (one passenger is killed).
2003 – The Spanish police thwart an attempt by ETA to detonate 50 kg of at 3:55 p.m. inside Madrid's busy Chamartín Station.
2005 – Chad–Sudan relations: Chad declares a state of belligerence against Sudan following a December 18 attack on Adré, which left about 100 people dead.
2008 – The Lord's Resistance Army, a rebel group, begins a series of attacks against civilians in the Democratic Republic of the Congo, massacring more than 400.
2018 – A helicopter crash kills Martha Érika Alonso, first female Governor of Puebla, Mexico, and her husband Rafael Moreno Valle Rosas, former governor.
2021 – Tatmadaw commit the Mo So massacre, killing at least 44 civilians.
1914 – John Muir, Scottish-American geologist, botanist, and author, founded Sierra Club (born 1838)
1920 – Stephen Mosher Wood, American lieutenant and politician (born 1832)
1923 – Dinny Lacey, Irish Hunger Striker died during the 1923 Irish hunger strikes (born 1895)Durney, James (2003) The Civil War in Kildare, Mercier Press, Cork, pg 165
1926 – Wesley Coe, American shot putter, hammer thrower, and discus thrower (born 1879)