Ahh - I worked in "Sleep" for 20 plus years and shudder when I read here some peoples sleep routines.
Sure we all have our own sleep requiremnets but please be safe out there driving when you know yourself to be sleep restricted. If you think that your mood or performance at work is worse than it was then maybe take more sleep.
At least the rabbits will still be around a bit latter now thatthe days are shorter.