When will Sidney Crosby return?

He is skating now and its taking time but no one knows when he is coming back because if he gets hit in the head again he may be done playing hockey forever. He may come back in the playoffs but don't get your hopes up. I would like him to play but if he is still so so I hope he doesn't because I don't want him not playing for the Penguins ever again. Hes out because of a concussion.