Autumnal equinox 2026

The first day of autumn is in 2026 on September 22 . It is also called the autumnal equinox, fall equinox or the beginning of autumn. Autumn is one of the four temperate seasons, the transition period between summer and winter usually in September when the arrival of night becomes noticeably earlier.

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More dates:

• Autumnal equinox on Sep 22, 2025 in Northern Hemisphere