Full moon, yeah. Lots of tension on that night.
Midnight, often it's after midnight i get really relaxed and completely immerse myself in imagination.
It's often a bit after midnight, the time when a 'normal' human biological clock calls for going to sleep that's a moment of choice for me. If i forego my urge to sit trough the night, i'll sleep normally and cozily. If i sit trough, i'll be sleeping awake, surfing the net, listening to music, drawing weird pictures, joyfully addled like with a drug. Then i'll feel a definite need to sleep after 3, but it will be an effor to doze off, rather than lie like a torpored corpse. So it's a tradeoff for me, hyperactivity in exchange for worse sleep.