Autumn Equinox

The Autumn Equinox occurs twice a year, around September 22-23, and marks the point when the Sun is directly above the Earth's equator. On this day, day and night are nearly equal in length across the globe. It signifies the beginning of fall in the Northern Hemisphere and spring in the Southern Hemisphere. The equinox happens because of Earth's tilt and orbit, balancing sunlight distribution. After this point, days become shorter in the north and longer in the south, leading into seasonal changes. It’s a key marker of seasonal transition and Earth's position relative to the Sun.