Astronomy

September equinox

3293days

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    There are 3,293 days until September equinox, on Sunday, 23 September 2035.

    September equinox at 04:38 UTC on 23 September 2035, computed with astronomy-engine. The Sun crosses the celestial equator heading south; day and night are close to equal length everywhere. Astronomical autumn begins in the Northern Hemisphere and spring in the Southern Hemisphere.

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    equinoxseasonsskycomputed

    Date source

    Computed astronomy

    Last verified Sep 10, 2026

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