#December__Dec  the last (12th) month of the year
  supertype:  #Gregorian_calendar_month  a month in the Gregorian calendar
  part:  #New_Year's_Eve  #Christmas_Day  #Christmas  #mid-December
  part of:  #Gregorian_calendar__New_Style  the solar calendar now in general use, introduced by Pope Gregory XIII in 1582 AD to correct an error in the Julian calendar by suppressing 10 days, making Oct 5 be called Oct 15, and providing that only centenary years divisible by 400 should be leap years; it was adopted by Great Britain and the American colonies in 1752
  part of:  #winter__wintertime  the coldest season of the year

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