ninth month in the Julian and Gregorian calendars
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September is the ninth month of the year in the Julian and Gregorian Calendars. September in the Southern Hemisphere is the seasonal equivalent of March in the Northern Hemisphere. September 1 marks the beginning of the meteorological autumn in the Northern hemisphere, and the beginning of the meteorological spring Southern hemisphere.


  • O sweet September, thy first breezes bring
    The dry leaf's rustle and the squirrel's laughter,
    The cool fresh air whence health and vigor spring
    And promise of exceeding joy hereafter.
  • The morrow was a bright September morn;
    The earth was beautiful as if new-born;
    There was that nameless splendor everywhere,
    That wild exhilaration in the air,
    Which makes the passers in the city street
    Congratulate each other as they meet.
    • Henry Wadsworth Longfellow, Tales of a Wayside Inn (1863–1874), Part I, The Student's Tale, The Falcon of Sir Federigo, line 135
  • The sultry summer past, September comes,
    Soft twilight of the soft-declining year.
    All mildness, soothing loneliness and peace;
    The fading season ere the falling come.
    • Carlos Wilcox, "The Age of Benevolence", Extracts from Book II, in Remains of the Rev. Carlos Wilcox (Hartford: Edward Hopkins, 1828), p. 153
  •   Encyclopedic article on September on Wikipedia
  •   The dictionary definition of September on Wiktionary