In Illinois bow season is always Oct. 1 through approx. Jan. 20. The only times it closes are for the two firearm seasons which are a three day weekend in mid Nov. and a four day weekend 2 weeks later. We also have a designated muzzleloader week end and late antlerless only seasons(Jan.) but you can bow hunt during these seasons as long as you wear blaze orange same as the gun hunters. Also if you bow hunt during the late winter doe only season, bucks are still legal for bow hunters, but not for gun hunters.