#Inauguration_Day__January_20  the day designated for inauguration of the United States President
  supertype:  #particular_day__day  a day assigned to a particular purpose or observance; "Mother's Day"
  part of:  #January__Jan  the first month of the year; begins 10 days after the winter solstice
     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

No statement uses or specializes #Inauguration_Day; click here to add one.