Autumn Equinox 2025 Est Time. The 2025 autumnal equinox will occur on september 22, 2025, at 14:21 utc (coordinated universal time). 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.

On the day of the winter (december) solstice, the sun passes through the southernmost point of the. Learn why we recognize and celebrate these days with nature in this excerpt from the perelandra garden workbook by machaelle wright.