Our Italian sources say that white wine will keep you awake and red wine puts you to sleep. With that advice, one only needs know the time of day, or how you'd like to spend it.
At some juncture, some years ago, Tony decided that (like everything else) one could only understand the process by undergoing it. So, he made his own wine, complete with female grape stompers and a BIG bucket. The experiment resulted in a wine free of sulfites---very drinkable. Unfortunately, there are only so many hours in the day so, with cues to be made the wine making has been left to the wine makers.