Fall aboard! The autumnal equinox marks the start, happening at 8:43 a.m. ET on Sunday, Sept. 22. Here's everything you need to know about the season.

During an equinox, places around the globe experience nearly equal amounts of daytime and nighttime. The second occurrence ...

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It's almost time to fall into fall, though in many parts of the country, it feels like we're already there. There are ...

In Japan, Autumnal Equinox Day is a national holiday. In Japanese, it’s known as Shubun no Hi (秋分の日), according to Coto ...

See how our seasons come from Earth's tilt and yearly loop around the sun, which changes the ice cover, vegetation, and ...