When Is The Autumnal Equinox 2025

When Is The Autumnal Equinox 2025. The vernal equinox marks the beginning of astronomical. Autumnal equinox, two moments in the year when the sun is exactly above the equator and day and night are of equal length;


When Is The Autumnal Equinox 2025

The first day of autumn is in 2025 on september 22 (according to the astronomical definition). The official first day of fall is officially sunday, september 22, 2025.

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