And not just for your internal clock and sleeping patterns. With the sun going down earlier that means more people walking around in the dark. According to this study, that means pedestrians are 3 times more likely to be hit by cars. So make sure you've a) set your clocks back; and b) look both ways before you cross the street.
thanks for the reminder- i kept looking at my computer clock and wondering why my hour on was going so slowly. (i hoped it was becos of some spirit that wanted me to stay on the computer forever, but no)