Days until fall
324 days
In 324 days
until September equinox (first day of fall), Thursday, September 23, 2027
324days
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September equinox (first day of fall) is today. The countdown starts again for next year after midnight.
Counts down to midnight at the start of September 23, 2027 in your own time zone.
September equinox (first day of fall) 2027
- Date
- Thursday, September 23, 2027
- Days left
- 324
- Months and days
- 10 months, 20 days
- Weeks
- 46 weeks, 2 days
- Weekdays between
- 231 (Monday–Friday, not counting today or the day itself)
- Exact moment
- September 23, 2027 at 6:01 AM UTC
Counts on this page were calculated on November 3, 2026; the large countdown above is live.
About September equinox (first day of fall)
The September equinox is the moment the sun crosses the celestial equator heading south. It begins astronomical autumn in the Northern Hemisphere and spring in the Southern Hemisphere.
Rule: September equinox, about September 22–23.
September equinox (first day of fall) in future years
- 2027 Thursday, September 23
- 2028 Friday, September 22
- 2029 Saturday, September 22
- 2030 Sunday, September 22
- 2031 Tuesday, September 23
More countdowns
- Thanksgiving 23 days
- Black Friday 24 days
- Winter 48 days
- Christmas 52 days
- New Year’s Eve 58 days
- New Year 59 days
- Valentine’s Day 103 days
- St. Patrick’s Day 134 days
- Spring 137 days
- Easter 145 days
- Mother’s Day 187 days
- Memorial Day 209 days
- Father’s Day 229 days
- Summer 230 days
- The Fourth of July 243 days
- Labor Day 307 days
- Halloween 362 days
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