From Eastern to Pacific, drivers might cross three or more time zones, with daylight saving adding extra complexity. Some states split between different time zones, while Hawaii and Arizona skip daylight saving entirely. This guide helps interstate travelers navigate America's complicated relationship with time, ensuring your reservations stay on schedule and you're never caught by surprise when your phone suddenly jumps ahead (or behind) your dashboard clock.

Hawaii may only have three major interstates but one of them has had more care, thought, and time put into it than any other: Hawaii's H-3!