Heliotempo
EN
Heliotempo

September equinox 2027

The September equinox 2027 happens on September 23, 2027 at 06:01 UTC.

Time in UTC

Thursday, September 23, 06:01

Time remaining

356 d 22 h 32 min

Calculated with Astronomy Engine, an open-source library verified against the US Naval Observatory and NASA JPL. How we calculate

Northern Hemisphere

first day of astronomical autumn

Southern Hemisphere

first day of astronomical spring

At the September equinox the Sun crosses the celestial equator heading south. Day and night are close to equal everywhere, and from now on the Southern Hemisphere gets more daylight than the Northern.

Why "equal night" is not exact: sunrise and sunset are measured at the upper edge of the Sun and the atmosphere bends its light, so on the equinox most places get a few minutes more day than night.

The exact moment

Solstices and equinoxes are instants, not whole days: the moment is the same everywhere, only the clock time differs by time zone.

Full disc of Earth seen from space, centred on Africa and the Atlantic, with both poles near the edge
Earth on 22 September 2024, the day of the September equinox: the Sun stands over the equator and both hemispheres are lit almost equally. Photo: NASA EPIC Team

Day length on September 23

CityLocal timeSunriseSunsetDay length
ReykjavikSeptember 23, 06:0107:1319:2612 h 13 min
OsloSeptember 23, 08:0107:0319:1512 h 12 min
EdinburghSeptember 23, 07:0106:5919:1012 h 11 min
LondonSeptember 23, 07:0106:4818:5712 h 10 min
BerlinSeptember 23, 08:0106:5319:0312 h 10 min
LjubljanaSeptember 23, 08:0106:5018:5812 h 9 min
New YorkSeptember 23, 2:01 AM6:44 AM6:52 PM12 h 7 min
RomeSeptember 23, 08:0106:5819:0612 h 8 min
TokyoSeptember 23, 15:0105:3017:3812 h 8 min
Los AngelesSeptember 22, 11:01 PM6:41 AM6:50 PM12 h 9 min
DubaiSeptember 23, 10:0106:0818:1512 h 7 min
HonoluluSeptember 22, 8:01 PM6:20 AM6:28 PM12 h 7 min
Mexico CitySeptember 23, 00:0106:2618:3212 h 6 min
Cape TownSeptember 23, 08:0106:3518:4312 h 8 min
SydneySeptember 23, 4:01 PM5:44 AM5:52 PM12 h 7 min
Buenos AiresSeptember 23, 03:0106:4218:5112 h 9 min

More events

Related tools

Day length chartDaylight and twilight through the whole year.Solar noon and solsticesSolar noon, solstices, equinoxes and the equation of time.Sunrise and sunsetSunrise, sunset, twilight and day length for any place and date.

Related guides

Solstices and equinoxes explainedWhat the solstices and equinoxes are, why their dates move between years, and what they mean for daylight where you live, with exact dates and times.Why days are longer in summer (and what the midnight sun is)How the 23.4° tilt of Earth's axis makes summer days long and winter days short, how much that depends on where you live, and why the poles get months of midnight sun and polar night.Why the earliest sunset is not on the shortest dayThe earliest sunset and the latest sunrise do not fall on the winter solstice. The reason is the equation of time, and it is easy to see in real numbers.

Read the cookie policy