Thank you all for the emails and comments. I managed to get California back in the right time zone in this chapter.
Don't speculate too much on what's going to happen with Viktor - you'll find out in Chapter 22.
Also, Harry owns 50 acres. There are 40 acres that are within the fence perimeter. So Cal doesn't need to dig tunnels or come out of a Bat-Cave somewhere else. Simply having lights aimed in someone else's eyes at night, to screw up their night vision, and taking off from a dark corner, is more than good enough.