for every time zone it is an hour ahead or an hour behind.
there are 4 sets of time zones in the continental United States. Eastern, Central and Mountain and pacific. Between the eastern and mountain there is a 3 hour difference, between mountain and pacific there is only 1 hour difference. And between central and pacific there is a 2hour difference.
Except in AZ, they are on standard time, they are two hours behind me(central time), three hours behind Eastern, and in time with Pacific. I'm buying goats from a breeder in AZ and the only time I can get her is really late at night or like around chore time here.