There is a 3 hour difference between the time zones of the west and east coasts of the United States. If it is 8 AM on the east coast, it is 5 AM on the east coast.East coast is three hours ahead of west coast. This is true for the USA.four hoursthree hours4 AM Pacific Standard Time (UTC-8) = 7 AM Eastern Standard Time (UTC-5)5 AM Pacific Daylight Saving Time (UTC-7) = 8 AM Eastern Daylight Saving Time (UTC-4)There are four time zones in the United States. If you are on the east coast, you are in the Eastern time zone. If you are on the west coast, you are in the Pacific time zone. There is a three hour time difference between the two coasts.four hoursthree hours4 AM Pacific Standard Time (UTC-8) = 7 AM Eastern Standard Time (UTC-5)5 AM Pacific Daylight Saving Time (UTC-7) = 8 AM Eastern D