I feel they start a few days out. I went out this weekend and my hunt was hot and had little deer movement. I played the Lunar Table game and what the Farmers Almanac suggested and still saw only a few deer. I think hunting is best near, during or just after the NEW moon. I feel they are less likely to move at night at that time. However, I took my time to scout and fill feeders. Found one good scrape and a few that looked interrupted or just not into it at the time. Found a couple of nice rub lines too.