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Equinox 2025 Dates

Equinox 2025 Dates. When do the four seasons start in 2025—for spring, summer, fall, and winter? In 2025, the autumnal (fall) equinox arrives on sunday, september 22, marking the official first day of fall.


Equinox 2025 Dates

Everything you need to know about the spring equinox 2025, including when it is, what it is and how it affects our planet. An equinox is one of two days in the year when the sun crosses the equator and day and night become equal in length.

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