US time now across every zone, on one board. The continental United States spans four zones — Eastern, Central, Mountain and Pacific — with Alaska and Hawaii adding two more, so the country covers a six-hour spread from Honolulu to New York. Arizona is listed separately because it stays on standard time all year while its neighbours shift.
The three-hour coast-to-coast gap
Eastern and Pacific run three hours apart, which is the single fact that governs American scheduling: a 9 a.m. call in New York is 6 a.m. in Los Angeles. The workable national window is roughly noon to 5 p.m. Eastern. Add Alaska and Hawaii and the spread widens to five or six hours depending on the season — see calling across US time zones.
Why Arizona is on its own row
Arizona does not observe daylight saving, so it matches Mountain time in winter and Pacific time in summer without its own clock ever moving. The Navajo Nation, which extends into Arizona, does observe it. Hawaii also stays put year-round. Details in states that don't observe daylight saving.