Autumn equinox is arriving on September 23, 2014 at 2:29 (UTC). You can check the exact time in your area from here!
The autumn equinox is when the Earth has almost no tilt on its axis in regards to the sun. This means that both hemispheres of the Earth receive approximately the same amount of sunlight. You’ll notice that on equinox days, night and day are almost equal in length!
Get ready for sweater weather and foliage!
Lots of people seem to get confused about what exactly an equinox is, so we made a video explaining the real deal.