#September__Sep__Sept  the month following August and preceding October
  supertype:  Gregorian_calendar_month  a month in the Gregorian calendar
  part of:  Gregorian_calendar  autumn
  part:  Michaelmas_Day__Michaelmas__September_29  honoring the archangel Michael; a quarter day in England, Wales, and Ireland
  part:  Labor_Day  first Monday in September in U.S. and Canada
  part:  Citizenship_Day__September_17  celebrated in the United States
  part:  American_Indian_Day  US: the 4th Friday in September
  part:  mid-September  the middle part of September

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