Ready for sweater weather? Read on for surprising facts about the first day of fall, aka apple-picking and leaf-peeping ...

The autumn equinox, which comes around every September for the Northern Hemisphere, marks the official astronomical start of fall. This year, the equinox arrives Sunday, Sept. 22 at 8:44 a.m ...

The autumn equinox, which comes around every September for the Northern Hemisphere, marks the official astronomical start of fall. This year, the equinox arrives Sunday, Sept. 22 at 8:44 a.m ...

Fall equinox in the Northern Hemisphere is in September ... You can go around and declare, "It's officially the first day of autumn!" How you celebrate is up to you. Here's a suggestion: Put ...

By Katrina Miller This Sunday, the autumnal equinox is upon us, and with it, a shift to shorter days, longer nights and the astronomical start of fall in the Northern Hemisphere. Equinoxes occur ...