At midnight, as suggested by some bros...
:scare::scare::scare::scare::scare::scare::scare::scare::scare::scare::scare:
Oh man, that game is scary.I didn't sleep at all last night.
The music. The atmosphere. Even the notes are terrifying.
I only got an hour or so into the game before I got so scared I couldn't play it anymore ;-;
If you want to play a true scary game, try Penumbra Overture.
Buy it with the Humble Indie Bundle and get a few other great games.