Also odd is that Arizona is on Mountain time. It borders a coastal state, it’s only about 300 miles from the coast, yet it’s on Mountain time zone.
Well, looking at the map of the United States, AZ is pretty much in-line south of ID, MT, WY, and UT, which are all on Mountain time (except the ID panhandle, which is on Pacific time to be more in sync with Spokane, WA), so it makes more sense based on sun location, rather than physical distance from the coast.
Hell, Reno, NV (also on Pacific time) is farther west than Los Angeles, CA. Use that as a bar bet...