New sleep schedule?

I'm going to see if going to sleep at 8pm every night and getting up at 4 or 5 in the morning will work. It's going to take some fiddling to get it to work right, but I think I can do it. Better would be sleep at 7 and wake at 3, since my dad usually goes to bed anymore at around 2 or 3. I can just have him nap in his chair until I'm back up at 3 and then help him to bed. Should work, if I can get around to getting off the computer by 7 at night that is.