Day and night will get equal time for a brief moment Monday as much of the world heads into fall. The autumnal equinox arrives Monday, marking the start of the fall season for the Northern Hemisphere ...

September's (sporadic) sweater weather chill and the changing leaf colors are a sign that the first day of fall is near. Here's what to know about the autumnal equinox and fall foliage forecast map ...

The Milky Way can be seen between trees. (WTOP/Greg Redfern) Fall officially arrives Monday, Sept. 22 at 2:19 p.m. Astronomically speaking, this is the date and time of the autumnal equinox, the ...