Seasonal milestone
September equinox
The September equinox is the instant the Sun crosses the celestial equator southward, marking a globally shared astronomical seasonal milestone.
13
days to go1 week and 6 days18h 18m 22s after the full days shown
DateSeptember 23, 2026 at 12:05 AM
CountdownLive to the second
TimezoneUTC
LocationWorldwide
Good to know
Is this the autumn equinox everywhere?
No. It marks autumn in the Northern Hemisphere and spring in the Southern Hemisphere, so the page uses the neutral astronomical name.