Tonight's Harvest Moon

The moon officially turns full when it reaches that spot in the sky exactly opposite the sun, and this moment will occur tonight (Sept. 29) at 11:19 p.m. EDT. When you gaze at the full moon tonight, think of farmers working late into the evening to gather their crops, because that's how the Harvest Moon got its name. http://www.huffingtonpost.com/2012/09/29/full-harvest-moon-2012-saturday-autumnal-equinox_n_1925196.html

The Harvest Moon allows farmers at the peak of the current harvest season to stay in the fields longer than usual, working by the moon's light. It rises around sunset, but also -- and more importantly -- the moon seems to appear at nearly the same time each successive night.
http://en.wikipedia.org/wiki/Harvest_moon