iCal Days/Week view beginning at 1AM

[RolandNights]

Is there anyway to change this? I went to preferences and changed it from 8 AM to 10 pm (which is what I want), but it still starts every day in Days/Week views at 12 AM. I don't need the big blocks of time that I spend sleeping to appear on my schedule, so I was hoping there'd be a way to just cut those parts out. FWIW, this Calendar syncs only with my default Google Calendar.

Thanks for any help.

Edit: in title I said 1 AM, but it really begins at 12 AM.