December 30 is the 364th day of the year in the Gregorian calendar. There is one day remaining until the end of the year.
999 – Battle of Glenmama: The combined forces of Munster and Meath under king Brian Boru inflict a crushing defeat on the allied armies of Leinster and Dublin near Lyons Hill in Ireland.
1066 – Granada massacre: A Muslim mob storms the royal palace in Granada, crucifies Jewish vizier Joseph ibn Naghrela and massacres most of the Jewish population of the city.
1419 – Hundred Years' War: Battle of La Rochelle
1460 – Wars of the Roses: Lancastrians kill the 3rd Duke of York and win the Battle of Wakefield.
1702 – Queen Anne's War: James Moore, Governor of the Province of Carolina, abandons the Siege of St. Augustine.
1813 – War of 1812: British soldiers burn Buffalo, New York.
1816 – The Treaty of St. Louis between the United States and the united Ottawa, Ojibwa, and Potawatomi Indian tribes is proclaimed.
1825 – The Treaty of St. Louis between the United States and the Shawnee Nation is proclaimed.
1853 – Gadsden Purchase: The United States buys land from Mexico to facilitate railroad building in the Southwest.
1890 – Following the Wounded Knee Massacre, the United States Army and Lakota warriors face off in the Drexel Mission Fight.[1]
1896 – Filipino patriot and reform advocate José Rizal is executed by a Spanish firing squad in Manila.
1896 – Canadian ice hockey player Ernie McLea scores the first hat-trick in Stanley Cup play, and the Cup-winning goal as the Montreal Victorias defeat the Winnipeg Victorias 6–5.
1897 – The British Colony of Natal annexes Zululand.
1903 – A fire at the Iroquois Theater in Chicago, Illinois kills at least 605.
1905 – Former Idaho Governor Frank Steunenberg is assassinated at the front gate of his home in Caldwell.
1906 – The All-India Muslim League is founded in Dacca, East Bengal, British India (later Dhaka, Bangladesh).
1916 – Russian mystic and advisor to the Tsar Grigori Yefimovich Rasputin was murdered by a loyalist group led by Prince Felix Yusupov. His frozen, partially-trussed body was discovered in a Moscow river three days later.
1916 – The last coronation in Hungary is performed for King Charles IV and Queen Zita.
1922 – The Union of Soviet Socialist Republics is formed.
1927 – The Ginza Line, the first subway line in Asia, opens in Tokyo, Japan.
1936 – The United Auto Workers union stages its first sitdown strike.
1943 – Subhas Chandra Bose raises the flag of Indian independence at Port Blair.
1944 – King George II of Greece declares a regency, leaving the throne vacant.
1947 – Cold War: King Michael I of Romania is forced to abdicate by the Soviet Union-backed Communist government of Romania.
1958 – The Guatemalan Air Force sinks several Mexican fishing boats alleged to have breached maritime borders, killing three and sparking international tension.
1965 – Ferdinand Marcos becomes President of the Philippines.
1972 – Vietnam War: The United States halts heavy bombing of North Vietnam.
1993 – Israel establishes diplomatic relations with Vatican City and also upgrades to full diplomatic relations with Ireland.
1996 – Proposed budget cuts by Benjamin Netanyahu spark protests from 250,000 workers who shut down services across Israel.
1997 – In the worst incident in Algeria's insurgency, the Wilaya of Relizane massacres, 400 people from four villages are killed.
2000 – Rizal Day bombings: A series of bombs explode in various places in Metro Manila, Philippines within a period of a few hours, killing 22 and injuring about a hundred.
2004 – A fire in the República Cromagnon nightclub in Buenos Aires, Argentina kills 194.
2005 – Tropical Storm Zeta forms in the open Atlantic Ocean, tying the record for the latest tropical cyclone ever to form in the North Atlantic basin.
2006 – Madrid–Barajas Airport is bombed.
2006 – The Indonesian passenger ferry MV Senopati Nusantara sinks in a storm, resulting in at least 400 deaths.
2006 – Former President of Iraq Saddam Hussein is executed.
2009 – A segment of the Lanzhou–Zhengzhou–Changsha pipeline ruptures in Shaanxi, China, and approximately 150,000 l (40,000 US gal) of diesel oil flows down the Wei Riverbefore finally reaching the Yellow River.
2009 – A suicide bomber kills nine people at Forward Operating Base Chapman, a key facility of the Central Intelligence Agency in Afghanistan.
2013 – More than 100 people are killed when anti-government forces attack key buildings in Kinshasa, Democratic Republic of the Congo.