 December 21 - Deaths: Encyclopedia - December 21December 21 is the 355th day of the year (356th in leap years) in the Gregorian calendar. There are 10 days remaining.
December 21 - Events.
69 - Year of the four emperors: Following Galba, Otho and Vitellius, Vespasian becomes the fourth Emperor of Rome within a year.
1620 - Plymouth Colony: William Bradford and the Mayflower Pilgrims land on what is now known as Plymouth Rock in Plymouth, Massachusetts.
1861 - Medal of Honor: Public Resolution ...
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