When Is Autumnal Equinox 2024. The equinoxes (vernal & autumnal) there are only two times of the year when the earth's axis is tilted neither toward nor away from the sun, resulting in a. A solstice is the day when the sun is at its highest or.

It is observed annually when the sun can be seen directly overhead along the equator. Because the fall equinox is not a fixed day but is rather based on an.