If you frequently need to check time zones across various regions, a convenient option is displaying multiple clocks on your iPhone's Home Screen. You can do so using the World Clock widget.

Mountain Time refers to the standard time observed in the Mountain Time Zone, which covers parts of the western United States and Canada. Mountain Time is used during the standard time period ...

Time zones across the US. What states are in what time zones? Alabama: Central; Arizona: Mountain. Most of Arizona, with the exception of the Navajo Nation, does not observe daylight saving time.