When Is Fall Solstice 2024. On the day of the autumn (september) equinox, the sun, moving along the ecliptic, crosses the celestial equator, moving from the northern hemisphere to the southern. Here's everything you should know about the fall equinox—plus our favorite fall facts, folklore, photos, and more!
The winter solstice is expected to begin on saturday, december 21, 2024 at 4:20 a.m. In the northern hemisphere, this is the december solstice (december 21, december 22, or december 23).