How many days until the September equinox?
Day and night are nearly equal everywhere; autumn begins in the north, spring in the south.
Counting down
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When it falls
September Equinox is an astronomical instant, not a calendar rule: the exact moment shifts by hours from year to year.
September Equinox: the next five years
| Year | Date |
|---|---|
| 2026 | Tuesday, September 22, 2026 (about 00:18 UTC) |
| 2027 | Thursday, September 23, 2027 (about 06:07 UTC) |
| 2028 | Friday, September 22, 2028 (about 11:55 UTC) |
| 2029 | Saturday, September 22, 2029 (about 17:44 UTC) |
| 2030 | Sunday, September 22, 2030 (about 23:33 UTC) |
Instants are computed from the same solar model as the globe, accurate to about ten minutes; the live card above shows the moment in your own time zone.
More countdowns
The countdown targets midnight at the start of the date in your own time zone, or the exact astronomical instant for equinoxes and solstices. Rules are evaluated in your browser, so this page never goes stale.