It is the 20th day of the year, with only 345 days remaining until the new year.
In ancient astronomy, it was the cusp day between Capricorn and Aquarius. In some years it is Aquarius, but in others Capricorn.
1265 - In Westminster, the first English parliament conducts its first meeting held by Simon de Montfort in the Palace of Westminster.
1783 - The Kingdom of Great Britain signs a peace treaty with France and Spain, officially ending hostilities in the American War of Independence.
1801 - John Marshall is appointed the Chief Justice of the United States.
1885 - L.A. Thompson patents the roller coaster.
1920 - The American Civil Liberties Union is founded.
1929 - In Old Arizona, the first full-length talking motion picture filmed outdoors, is released.
1934 - Fujifilm, the photographic and electric company, is founded in Tokyo, Japan.
1942 - At The Wannsee Conference held in the Berlin suburb, senior Nazi German officials discuss the implementation of the "Final Solution to the Jewish Question."
1945 - Germany begins evacuation of 1.8 million people from East Prussia, a task will take nearly two months.
1959 - The first flight of the Vickers Vanguard takes place.
1981 - Twenty minutes after Ronald Reagan is inaugurated, at age 69 the oldest man ever to be U.S. President, Iran releases 52 American hostages.
1986 - Martin Luther King Jr. Day, is celebrated as a federal holiday for the first time.
2007 - A three-man team, using only skis and kites, completes a 1,093-mile trek to reach the southern pole of inaccessibility for the first time since 1958 and for the first time ever without mechanical assistance.