I don't even worry about eating during the day. I eat when I get home (I have an hour commute), usually after working out. Many days my fast is as long as 22 hours. If I think of it, I'll munch on a hand full of almonds on during the drive home, after work. Weekends aren't even a problem, though if you want you can steal from the Body-for-Life plan and take a free day once a week, during the weekend or when it suits you.
I'm into my sixth week of IF, following the Fast Five plan. Duringt the first 2-3 weeks, I was almost obsessed with not eating, and then eating again. Those feeling have all left. I eat when I get to it, some days more, some days less. I feel free from worrying about what to eat for breakfast and lunch. I already know; nothing.
I was down 9lbs. on the scale this morning, which means nothing, really. My bodyfat% is decreasing and I'm getting stronger. Thats all that really matters to me, at this point.
My own view is eat and drink what you want, sensibly, within a five hour eating window. And don't worry about the rest. Your body will take care of it for you. IMHO