December 31st (1691) was a Monday. It's the 365th day of the year (366th in leap years) in the Gregorian calendar. There are 0 days left to the end of the year.
December 31st Famous Deaths for 1691
» Robert Boyle, Irish chemist and physicist (b. 1627)
» Dudley North (economist) or Dudley North, English merchant and economist (b. 1641)
December 31st Holidays in History
» Christian Calendar of saints called Feast Day:
» Pope Sylvester I (Catholic Church)
» December 31 (Eastern Orthodox liturgics)
» Public holidays in Azerbaijan named International Solidarity Day (Azerbaijan)