Autumn Equinox 2024 Countdown. Countdown to autumn with live clock. We’ll talk about what it is, when it happens, and why it’s special.
But again, this is only for the northern hemisphere, since the southern hemisphere experiences the reverse,. Autumn equinox 2024 (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.