The number of "night owls" sharing on this topic has amazed me. I have always been more of a night than morning person, but as PD has progressed my sleep patterns have become erratic, two or three hours one night, 5 the next, occasionally 8 hours. It feels like one reason for staying up late (these days on the computer) results from feeling my best physically and mentally late at night. Maybe when the day's stresses are behind, my dopamine stores are recharging. Whatever the reason, I start to pick up around 8 PM and often, if engaged in something interesting, go on till 3AM. Chuck