Wishing you a joyful Autumn Equinox! Today, September 22, 2025, at 2:20 p.m. EDT, marks the official start of fall in the Northern Hemisphere. This astronomical event occurs as the sun crosses the celestial equator, resulting in nearly equal day and night lengths—a phenomenon that gives the equinox its name. As we transition into autumn, expect to see several significant changes in the weather and environment around you.