The full moon closest to the Autumn equinox on September 22 this year in the northern hemisphere is most commonly known as the harvest moon. It's also known as the wine moon, Elk moon and singing moon. For a few days before and after the full harvest moon the moon rise is only 30-35 minutes later rather than the average 50 minutes the rest of the year. Because of this time lag in the northern latitudes it's like having about three days of full moon. These nights of bright moon shine meant that traditionally farmers could continue to harvest late into the night for several nights. Many birds migrate at night and rely on the light of the harvest moon, actually waiting for it's appearance to begin their Autumn journey.