There's like, four or five
The cut off zones? That's trickier. It's easier to just name a city and someone can tell you what time zone it's in. One state doesn't follow time zones. I think it's Arizona. Then you got Hawaii and Alaska. Not sure where they fit in. If you count their zones, could be more than five.
Actually, it's not really an hour behind since it's the same time here just different numbers. When it's seven pm here, it's eight on the east coast so they see the programming at eight, we see it at seven but we are actually seeing it the same time they are.
But, mountain and pacific time zones are not seeing it at the same time. They have to wait until their clocks say seven to see it. So, it's kind of like the folks on the East coast see everything first but not really, lol. Gets confusing, don't it?