gar fla, I would think it's probably best to try for KTNN maybe within an hour or less before Window Rock, AZ sunset, while skip is already well in progress where you are, but KTNN is still on their daytime non-directional pattern. This month (November), sunset for KTNN is at 5:15pm MST (7:15pm EST), and in December it's at 5pm MST / 7pm EST. I think it would be better to try toward the end of the month while the daylight time is still getting somewhat shorter, as, for example, on Nov 30, it will have already been fairly dark before KTNN changes to their directional pattern. I've occasionally used similar concepts to my advantage when DXing TPs. For example, near the end of September and October, I was able to get fairly good signals from 774-JOUB Akita, Japan, while it was still somewhat dark outside, even though local pest 760-KFMB had already switched from their 50kW night pattern to their 5kW day pattern.