The Mountain Standard Time Zone, includes that part of the United States that is west of the boundary line between the central and mountain standard time zones (view) and east of the boundary line between the mountain and Pacific standard time zones (view).
The Mountain Time Zone includes the states of Arizona*, Colorado, part of Idaho, part of Kansas, Montana, part of Nebraska, New Mexico, part of North Dakota, part of Oregon, part of South Dakota, part of Texas, Utah, and Wyoming.
Most of Arizona does not observe daylight saving time. The Navajo Indian Nation in northeastern Arizona does observe daylight saving time.
Five states are in both the Mountain and Central Time Zones. Those are Kansas, Nebraska, North Dakota, South Dakota and Texas. View the boundary line between Central and Mountain Time Zones.
Mountain Time Zone in the United States Time Details
Time Zone
Abbreviations
Mountain Daylight Time- is abbreviated as MDT
UTC - GMT
Offset
Mountain Time Zone is GMT/UTC - 6h during Daylight Saving Time
Daylight Saving
Time Usage
Daylight Saving
Start Date
Mountain Time Zone starts Daylight Saving Time
Sunday March 10, 2024 at 2:00 AM local time.
Daylight Saving
End Date
Mountain Time Zone ends Daylight Saving Time
Sunday November 3, 2024 at 2:00 AM local time.
