What is the difference between MST and UTC?
MST is 7 hours behind UTC.
UTC time
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MST
Mountain Standard Time
13 Nov 2025
Frequently Asked Questions
Does this region observe DST?
Most areas observing MST switch to MDT (Mountain Daylight Time) during DST, except locations like Arizona that remain on MST year-round.
Which major cities follow this offset?
Denver, Phoenix, and Calgary are notable cities that align with MST at different times of the year.
What areas share this offset?
Parts of the United States, Canada, and Mexico align with MST during standard periods, including Arizona, Alberta, and Sonora.
How does this compare with nearby regions?
It is one hour behind CST (Central Standard Time) and one hour ahead of PST (Pacific Standard Time).
Why doesn't Arizona observe DST?
Arizona opts out of DST to avoid extreme summer heat during later evening hours, ensuring consistent local routines.
How did this offset get established?
The concept of MST was formalized with the introduction of standard time zones in the late 19th century, largely driven by railroads.
What are the typical work hours here?
Work hours generally run from 8:00 AM to 5:00 PM, although variations exist depending on local preferences and industries.
What is the economic importance of this area?
The Mountain region includes significant industries such as mining, technology, and tourism, with hubs in cities like Denver and Salt Lake City.