MST to UTC Time Converter
UTC is 6 hours ahead of MST. The US Mountain states are currently on MDT (UTC-6:00), and UTC is the zero point, UTC±00:00.
Best Time to Call Between MST and UTC
Both zones are inside normal business hours between 9:00 AM and 11:00 AM MST — that's 3:00 PM to 5:00 PM UTC. That's a 2-hour window.
both at work MST only UTC only neither — hours along the strip are MST.
Common Times Converted
MST on the left, UTC on the right.
MST to UTC: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| MST | UTC | Working hours |
|---|---|---|
| 12:00 AM | 6:00 AM | — |
| 1:00 AM | 7:00 AM | — |
| 2:00 AM | 8:00 AM | — |
| 3:00 AM | 9:00 AM | UTC only |
| 4:00 AM | 10:00 AM | UTC only |
| 5:00 AM | 11:00 AM | UTC only |
| 6:00 AM | 12:00 PM | UTC only |
| 7:00 AM | 1:00 PM | UTC only |
| 8:00 AM | 2:00 PM | UTC only |
| 9:00 AM | 3:00 PM | Both zones |
| 10:00 AM | 4:00 PM | Both zones |
| 11:00 AM | 5:00 PM | MST only |
| 12:00 PM | 6:00 PM | MST only |
| 1:00 PM | 7:00 PM | MST only |
| 2:00 PM | 8:00 PM | MST only |
| 3:00 PM | 9:00 PM | MST only |
| 4:00 PM | 10:00 PM | MST only |
| 5:00 PM | 11:00 PM | — |
| 6:00 PM | 12:00 AM next day | — |
| 7:00 PM | 1:00 AM next day | — |
| 8:00 PM | 2:00 AM next day | — |
| 9:00 PM | 3:00 AM next day | — |
| 10:00 PM | 4:00 AM next day | — |
| 11:00 PM | 5:00 AM next day | — |
What MST and UTC Actually Are
MST — Mountain Standard Time
Denver, Salt Lake City, Calgary — and Phoenix year-round. Standing at UTC-7:00 as written, and the region does change its clocks, so its live offset moves by an hour twice a year. The next change is on Sunday, November 1, 2026, to MST. Arizona stays on MST all year, so Phoenix and Denver are an hour apart for eight months and identical for four.
Arizona has stayed on MST year-round since 1968 — the Navajo Nation within it does observe daylight saving, making the state a patchwork.
UTC — Coordinated Universal Time
The global reference standard. Aviation, computing and science run on it. Standing at UTC as written, and the region does not change its clocks, so that offset holds all year.
UTC is not a place. It is a computed standard, kept within a second of mean solar time at Greenwich by atomic clocks, and it is the reference every other zone is defined against.
What This Means in Practice
This gap is not fixed
MST changes its clocks and UTC does not, so the difference between them moves by an hour twice a year. A recurring meeting set now will drift for one side from Sunday, November 1, 2026 unless someone resets it.
Major Cities in Each Zone
Cities on MST
Frequently Asked Questions
What is the time difference between MST and UTC?
UTC is 6 hours ahead of MST. That is the live figure. Taken strictly as written, the gap between MST and UTC is 7 hours — the two differ because at least one of these regions is currently on daylight saving.
What is 9:00 AM MST in UTC?
9:00 AM MST is 3:00 PM UTC.
What are the best hours to schedule a call between MST and UTC?
Between 9:00 AM and 11:00 AM MST, which is 3:00 PM to 5:00 PM UTC. Both sides are inside normal business hours through that window.
Does the difference between MST and UTC change during the year?
Yes. MST observes daylight saving and UTC does not, so the gap shifts by an hour at least twice a year. The next clock change is on Sunday, November 1, 2026.
Does MST always mean Mountain Standard Time?
Arizona stays on MST all year, so Phoenix and Denver are an hour apart for eight months and identical for four.