It has always been my understanding that breeding goes on all fall from about mid October through December. This is due to the fact that some does will go into estrous in mid October. Then, those that aren't bred, plus many other does will then go into estrous in mid-November. Any does not yet bred will go into a third estrous cycle again in mid-December. Obviously the highest number of does are typically in estrous in mid-November, thereby providng what we call the "rut", which is really just that small window in the fall breeding season when the greatest number of does are in estrous. In my area (New York) I've always understood that to happen around November 12th, give or take a week. I'm sure weather and moon phase probably play a small role in swinging it either direction.