Spring works rather well, however, there are those (like myself) who will move their grasses whenever they feel like it.

Jake

Yes, spring is best. But since you're in zone 7, and since you will not be dividing the plant, now will probably be okay. In NC, you will have more time than we up north for the plants to restablish themselves. Be sure to get as much of the roots as possible. Dig the new hole bigger than the root ball; fill in with friable soil (easier for the roots to grow in). Don't fertilize, and don't let the transplant dry out.

Like Jake, I have moved grasses at whim throughout their growing seasons (with okay results), but have since disciplined myself to wait until Spring when I can divide as well.