How will time be affected as a person travels from the east cost of the US to the west cost?

As a person travels from the east coast to the west coast of the United States, they will cross multiple time zones. The east coast operates on Eastern Time (ET), while the west coast is on Pacific Time (PT), which is three hours behind ET. This means that if it's noon on the east coast, it will be 9 AM on the west coast. Therefore, the traveler will experience a shift in time that effectively makes them "lose" three hours during the journey.