September comes from the Latin month name meaning “seventh month” in the old Roman calendar.
September derives from the Latin septem, meaning seven, because in the original ten-month Roman calendar attributed to Romulus, it was the seventh month. When January and February were added and the calendar restructured, September became the ninth month but kept its numerical name — a beautiful etymological anachronism that has survived two millennia. As a personal name, September belongs to the rarefied category of calendar names used in the English-speaking world: a constellation that includes April, May, June, and August but very rarely reaches the autumn months.
The name has appeared in literature and the arts with an otherworldly quality — it evokes harvest light, the last warmth before winter, back-to-school melancholy, and the particular clarity of early autumn skies. In popular culture, Earth, Wind & Fire's 1978 song "September" — which famously asks "Do you remember / The 21st night of September?" — gave the month name an enduring association with joy and communal memory.
The song's exuberant opening is one of the most recognized in American music, lending September a festive, golden-hour atmosphere. As a given name, September remains genuinely rare, which is part of its appeal for parents drawn to the month-and-season naming tradition who want something beyond the well-worn May or June. It works with particular magic for children born in that month, anchoring them to a season with a rich sensory vocabulary: amber leaves, cool mornings, the smell of apples. It is long for a name, which gives it weight and presence, and it nicknames naturally to Sept or Ember — the latter glowing with its own warm imagery.