Does Arizona have 2 time zones? Yes, Arizona effectively has two time zones. Arizona is in the Mountain Standard Time zone, and most of the state does not observe daylight saving time.

What time zone is Phoenix in? Phoenix — and most of Arizona, except for the Navajo Nation — observes Mountain Standard Time year-round. We don’t fall back or spring forward.

Tennessee's two time zones, it turns out, are not that unusual. In all, 15 U.S. states have more than one time zone.

The Tennessee boundary line between the Central and Eastern time zones follows the eastern borders of Pickett, Fentress, Cumberland, Bledsoe, Sequatchie and Marion counties.

Once a new lunar time zone is established, the methods used to create it will be useful for future space exploration, Dr. Burns said.