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What Happened On 31st December 664 In History

December 31st (664) was a Saturday. 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 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)

Year 664 historical events for the month of December

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World History for the 31st December