UTC to MST Converter
Mountain Standard Time is UTC-7 (winter) and UTC-6 (summer, MDT). Arizona stays UTC-7 year-round.
UTC to MST Conversion Table
Full 24-hour table. MST = UTC-7 (November–March) · MDT = UTC-6 (March–November, daylight saving)
| UTC (24h) | UTC (12h) | MST (UTC-7) | MDT (UTC-6) |
|---|---|---|---|
| 00:00 | 12:00 AM | 5:00 PM(prev day) | 6:00 PM |
| 01:00 | 1:00 AM | 6:00 PM(prev day) | 7:00 PM |
| 02:00 | 2:00 AM | 7:00 PM(prev day) | 8:00 PM |
| 03:00 | 3:00 AM | 8:00 PM(prev day) | 9:00 PM |
| 04:00 | 4:00 AM | 9:00 PM(prev day) | 10:00 PM |
| 05:00 | 5:00 AM | 10:00 PM(prev day) | 11:00 PM |
| 06:00 | 6:00 AM | 11:00 PM(prev day) | 12:00 AM |
| 07:00 | 7:00 AM | 12:00 AM | 1:00 AM |
| 08:00 | 8:00 AM | 1:00 AM | 2:00 AM |
| 09:00 | 9:00 AM | 2:00 AM | 3:00 AM |
| 10:00 | 10:00 AM | 3:00 AM | 4:00 AM |
| 11:00 | 11:00 AM | 4:00 AM | 5:00 AM |
| 12:00 | 12:00 PM | 5:00 AM | 6:00 AM |
| 13:00 | 1:00 PM | 6:00 AM | 7:00 AM |
| 14:00 | 2:00 PM | 7:00 AM | 8:00 AM |
| 15:00 | 3:00 PM | 8:00 AM | 9:00 AM |
| 16:00 | 4:00 PM | 9:00 AM | 10:00 AM |
| 17:00 | 5:00 PM | 10:00 AM | 11:00 AM |
| 18:00 | 6:00 PM | 11:00 AM | 12:00 PM |
| 19:00 | 7:00 PM | 12:00 PM | 1:00 PM |
| 20:00 | 8:00 PM | 1:00 PM | 2:00 PM |
| 21:00 | 9:00 PM | 2:00 PM | 3:00 PM |
| 22:00 | 10:00 PM | 3:00 PM | 4:00 PM |
| 23:00 | 11:00 PM | 4:00 PM | 5:00 PM |
* UTC 00:00–06:00 converts to MST on the previous calendar day.
Popular UTC to MST Conversions
| UTC Time | MST (UTC-7) | MDT (UTC-6) | Context |
|---|---|---|---|
| 8:00 UTC | 1:00 AM MST | 2:00 AM MDT | Early morning Mountain |
| 12:00 UTC (noon) | 5:00 AM MST | 6:00 AM MDT | UTC noon |
| 14:00 UTC (2pm) | 7:00 AM MST | 8:00 AM MDT | Morning in Denver |
| 15:00 UTC (3pm) | 8:00 AM MST | 9:00 AM MDT | |
| 17:00 UTC (5pm) | 10:00 AM MST | 11:00 AM MDT | Mid-morning Mountain |
| 20:00 UTC (8pm) | 1:00 PM MST | 2:00 PM MDT | Afternoon Mountain |
| 22:00 UTC (10pm) | 3:00 PM MST | 4:00 PM MDT | |
| 23:00 UTC (11pm) | 4:00 PM MST | 5:00 PM MDT | Evening in Mountain Time |
What Is UTC?
UTC (Coordinated Universal Time) is the global time standard that never changes for daylight saving. Every time zone in the world is defined as an offset from UTC — MST is UTC-7, PST is UTC-8, IST is UTC+5:30. When you see a timestamp ending in Z or labeled UTC, that's the baseline.
UTC is the same as GMT for everyday purposes. If someone says "2 PM GMT," the UTC-to-MST calculation is identical: subtract 7 hours, land at 7 AM MST.
📊 UTC is the basis for all 38 UTC offsets used globally — from UTC-12:00 (Baker Island) to UTC+14:00 (Line Islands, Kiribati). — IANA Time Zone Database
What Is MST (Mountain Standard Time)?
MST (Mountain Standard Time) is UTC-7 — 7 hours behind Coordinated Universal Time. It covers the Mountain region of the United States and Canada during winter months: Colorado, Utah, New Mexico, Wyoming, Montana, and most of Idaho.
During summer (Daylight Saving Time), MST advances one hour to MDT (Mountain Daylight Time, UTC-6). The switch happens on the second Sunday of March and reverts on the first Sunday of November. Check exact dates for any year at our daylight saving time page.
Here's the wrinkle: Arizona doesn't move. Most of Arizona (the Navajo Nation is the exception) stays on MST year-round — UTC-7 in both winter and summer. So if it's summer and you're scheduling a call with someone in Denver vs. Phoenix, they're in different offsets despite both being "Mountain Time."
UTC to MST Offset Explained
MST is UTC minus 7 hours. Subtract 7 from any UTC time to get MST. If the result goes below 0, it falls on the previous calendar day.
Quick formula: MST = UTC − 7 hours · MDT = UTC − 6 hours (March–November)
If UTC hour is 0–6, the MST time falls on the previous day (e.g., 04:00 UTC = 9:00 PM MST previous day).
Frequently Asked Questions — UTC to MST
What is the UTC to MST time difference?
MST (Mountain Standard Time) is UTC-7, meaning it is 7 hours behind UTC. During MDT (Mountain Daylight Time, March–November), the offset becomes UTC-6 — 6 hours behind UTC.
What time is 12:00 UTC in MST?
12:00 UTC (noon) is 5:00 AM MST during standard time (UTC-7). During daylight saving time (MDT, UTC-6), 12:00 UTC is 6:00 AM MDT.
Does Arizona observe daylight saving time?
No. Arizona (except the Navajo Nation) does not observe DST. It stays on MST (UTC-7) year-round. So when the rest of the Mountain Time zone moves to MDT (UTC-6) in summer, Arizona stays 7 hours behind UTC.
Does MST change for daylight saving time?
Most MST states switch to MDT (UTC-6) on the second Sunday of March and revert to MST (UTC-7) on the first Sunday of November. Arizona is the major exception — it stays on MST permanently.
What US states use Mountain Time?
Mountain Time states include Colorado, Utah, New Mexico, Wyoming, Montana, and most of Idaho. Arizona observes MST year-round (no DST). Parts of North Dakota, South Dakota, Nebraska, and Kansas also use Mountain Time.