UTC to MST Time Zone Converter
UTC to MST converts Coordinated Universal Time into US Mountain Time — the clock for Denver, Salt Lake City, and Albuquerque. Mountain runs 7 hours behind UTC in winter and 6 hours behind in summer, because most of the region shifts to daylight time while UTC never moves. The converter picks the right gap for whatever date you choose.
Enter a date and time to convert.
Daylight saving is applied automatically for the date you pick. Labels like PST/EST name the zone (Pacific/Eastern); the real abbreviation shifts to PDT/EDT during daylight saving, and gmt here means London (GMT in winter, BST in summer) while utc stays fixed.
The time difference
US Mountain Time is always behind UTC. In winter the gap is 7 hours; in summer it narrows to 6 hours. The reason is that Mountain springs forward for daylight saving while UTC holds still, so the two clocks are an hour closer together through the warmer months.
A worked example
Take 9:00 AM UTC. On January 15, 2026 that is 2:00 AM in Mountain Time — seven hours behind. On July 15, 2026 the same 9:00 AM UTC becomes 3:00 AM, because Mountain is on daylight time and only six hours behind. A mid-morning UTC time is deep in the night out West either way.
Daylight saving & the abbreviation caveat
The slug says "MST," which is really the winter name. From March to November the zone is MDT (Mountain Daylight Time) — locals just say "MT" and leave it at that. UTC never changes. So if the result shifts by an hour between winter and summer, that's Mountain switching, not an error. The converter applies the correct offset for the date you pick.
When you'll use it
Useful for scheduling a call with a Denver team, timing a Mountain-time event, catching a live broadcast out West, or coordinating remote work when your calendars and logs run on UTC.
Frequently asked questions
How many hours behind UTC is Mountain Time?
Seven hours behind in winter (MST) and six hours behind in summer (MDT). The clocks move forward in spring, which cuts the gap by an hour until fall.
What time is 15:00 UTC in Denver?
In winter that's 8:00 AM Mountain; in summer it's 9:00 AM. The exact answer depends on the date, which is why the converter asks for one.
Does all of Mountain Time change its clocks?
Most of it does, including Denver. Arizona is the big exception — it stays on standard time year-round. This converter uses standard Mountain Time, which springs forward on March 8, 2026, and falls back on November 1, 2026.