When Is The Autumn Equinox 2025

When Is The Autumn Equinox 2025. The autumn equinox arrives at 10:21 a.m. An equinox is one of two days in the year when the sun crosses the equator and day and night become equal in length.

Autumn equinox 2025 (beginning of astronomical autumn) on the day of the autumn (september) equinox, the sun, moving along the ecliptic, crosses the celestial equator, moving from the. This year autumn begins on 23 september 2023 and ends on 22 december 2023.