Still Sleeping

This morning I decided that I would not wake the baby from his morning nap. Lately, he has been sleeping so long that I thought that it was affecting his afternoon "nap" (read: screamfest). So, after about an hour and a half, I open the door. This is usually enough to wake Prince Charming. Since he is refusing his afternoon nap altogether, today we are trying stock up on the zzz's. It is now 12:30pm. He has been sleeping since 9:30am. Should I wake him? Does he think that it is nighttime?