Last year in Pike County, the rut was really going strong on opening weekend, like around November 10th. Like the other guys say though, it might be more noticeable around the 13th(my birthday), even up to the 18th or 20th. I've seen bucks chasing does on Thanksgiving morning before, once took a fine 8 point doing just that. She was a yearling, and apparently came into heat a little later than the older does.
Personally, I love the last 10 days in October, and the first 10 days in November best of all. Thru the years, I've had some unforgettable times when hunting any of those days.
I still laugh over a sapling I found two years ago that a frustrated, rut filled buck had demolished. You could almost sense his rage just looking at his handy work. He was sure PO'd about something. That was around November 5th, I believe it was opening day that year for the youth hunt.