AstronomyTentative

September equinox

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    Event time shown in UTC. The countdown follows the same moment worldwide.

    Photo: Image by Przemyslaw "Blueshade" Idzkiewicz · CC BY-SA 2.0 · via Wikimedia Commons

    Schedule updated. Previously Tuesday, 22 September 2037.

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    September equinox is provisionally scheduled for Tuesday, 22 September 2037. The listed date may change. Check the source for confirmation.

    Sun over the equator again. Harvest in the north.

    The September equinox is the moment when the Sun appears to cross the celestial equator, heading southward. Because of differences between the calendar year and the tropical year, the September equinox may occur from September 21 to 24.

    Summary from Wikipedia (CC BY-SA 4.0)

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    Source last checked Oct 10, 2026

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