MST to UTC Time Zone Converter
This converts US Mountain Time (Denver, Salt Lake City — locals just say MT) to UTC, the global reference clock. UTC sits ahead of Mountain by 7 hours in winter and 6 hours in summer, because Mountain 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
UTC is ahead of US Mountain Time — by 7 hours in winter and 6 hours in summer. The gap moves because UTC holds still while Mountain Time shifts. When Denver springs forward in March, it steps one hour toward UTC, narrowing the gap to 6 hours until the clocks fall back in November.
A worked example
Take 9:00 AM in Denver. On January 15, 2026 that's 4:00 PM UTC the same day. On July 15, 2026 the same 9:00 AM lands at 3:00 PM UTC, an hour earlier on the UTC clock because Mountain Time is on daylight saving in summer.
Daylight saving & the abbreviation caveat
The slug says MST, the standard-time name, but from spring to fall Mountain Time runs as MDT — that's why locals just say "MT." US clocks spring forward on March 8, 2026 and fall back on November 1, 2026. UTC is the fixed world reference and never observes daylight saving, so all of the yearly movement comes from the Mountain side. The converter handles the switch for the date you pick, so the result is always right for that day.
When you'll use it
UTC is the clock servers, logs, and flight schedules run on, so you'll reach for this when reading a timestamp, scheduling a deployment window, or lining up a call with a team that coordinates in UTC. It's also handy for gaming and live streams that post start times in UTC.
Frequently asked questions
Is UTC always 7 hours ahead of Mountain Time?
No — it depends on the season. UTC is 7 hours ahead in winter (standard MST) and 6 hours ahead in summer, when Denver runs on daylight time (MDT). UTC itself never changes.
Why does the gap change during the year?
UTC doesn't observe daylight saving, but US Mountain Time does. When Denver springs forward in March, its clock moves an hour closer to UTC, so the gap drops from 7 to 6 hours until fall.
Does Arizona use this converter?
Arizona stays on MST all year and doesn't spring forward, so its gap to UTC is a steady 7 hours. This converter follows standard US Mountain (Denver) rules, which do switch.