What Time Is Autumn Equinox 2025. The spring equinox 2025 is a significant astronomical event that marks the beginning of spring in the northern hemisphere and autumn in the southern hemisphere. Find out the date when september equinox is in 2025 and count down the days until september equinox with a countdown timer.
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. Date and time for solstices and equinoxes.
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