Sept. 22, day and night will be nearly equal in length as Earth spins side-on to the sun and autumn officially begins in the Northern Hemisphere.

The autumn equinox is what officially marks the start of fall. When is the first day of fall in 2024? Here is what you need to know.

Fall equinox in the northern hemisphere is in September and it marks a welcome shift in the seasons for many after a long, hot summer. But what exactly is an equinox? It's all about Earth and its relationship with the sun.

This year, the first day of fall is coming up on September 22, otherwise known as the autumnal equinox. From then on, you can expect to have to approach your trail adventures a li