Current Time in UTC-7 Zone
About UTC-7
Discover all countries and IANA time zones in the UTC-7 offset. View the current local time for all locations with this UTC offset.
UTC Offset: UTC-7
What is UTC-7?
UTC-7 is a fixed offset from Coordinated Universal Time: clocks on this offset are always 7 hours behind UTC. Unlike a named time zone, a UTC offset never shifts for daylight saving time. Regions that observe DST alternate between two different UTC offsets across the year, which is why the countries listed below can change with the seasons.
In aviation, shipping, and military usage, UTC-7 corresponds to the Tango time zone (T), written with the letter suffix T in Zulu notation. Pilots and NATO forces use these letter zones so an order like "0800T" is unambiguous worldwide.
UTC-7 vs GMT-7
On a wall clock, UTC-7 and GMT-7 show the same time. The difference is in what they refer to: UTC is the modern standard kept by atomic clocks and used in computing, aviation, and science, while GMT is the older convention based on mean solar time at Greenwich. Technical systems, logs, and APIs should reference UTC-7.
Time & Daylight in UTC-7
Time Difference Between UTC-7 and Major Cities
Live local time and the difference from UTC-7 right now.
Current time shown is based on the representative IANA zone: America/Boise
UTC-7: The Mountain Time Offset and Its Unique Role
UTC-7 is a fixed offset from Coordinated Universal Time, meaning clocks here are always seven hours behind UTC. Unlike named time zones such as Mountain Standard Time (MST) or Pacific Daylight Time (PDT), UTC-7 does not change with seasons. Regions that observe daylight saving time (DST) move onto this offset during their summer months and off it in winter, so the list of places at UTC-7 shifts twice a year. This article explores the geography, seasonal behavior, and practical implications of UTC-7.
Fixed Offset vs. Named Zone
A fixed UTC offset like UTC-7 is a simple number: the local time is always UTC minus 7 hours. A named time zone, such as Mountain Standard Time (MST), is tied to a specific region and may include DST rules. For example, Denver uses MST (UTC-7) in winter but switches to Mountain Daylight Time (MDT, UTC-6) in summer. At UTC-7, you get the same time as MST in winter and the same as PDT in summer. This distinction matters for scheduling across DST boundaries.
Seasonal Movement: Who Is on UTC-7 When?
Because DST regions change their offset, the set of countries at UTC-7 is not static. In winter (November to March), most of the Mountain Time Zone in Canada, Mexico, and the United States uses UTC-7. In summer (March to November), those regions shift to UTC-6, and the Pacific Time Zone (which uses UTC-8 in winter) moves to UTC-7. So, during summer, cities like Los Angeles and Vancouver join UTC-7, while Denver and Edmonton leave it. The year-round residents at UTC-7 are places that do not observe DST, such as most of Sonora, Mexico, and parts of British Columbia and Arizona.
Regions and Cities on UTC-7
The following regions and cities use UTC-7 at least part of the year. IANA zones include: America/Boise, America/Cambridge_Bay, America/Ciudad_Juarez, America/Creston, America/Dawson, America/Dawson_Creek, America/Denver, America/Edmonton, America/Fort_Nelson, America/Hermosillo, America/Inuvik, America/Mazatlan, America/Phoenix, America/Whitehorse, Canada/Mountain, US/Arizona, US/Mountain.
- Canada: Most of Alberta (Edmonton, Calgary), the Northwest Territories (Inuvik, Yellowknife), parts of British Columbia (Creston, Dawson Creek, Fort Nelson), and Yukon (Whitehorse, Dawson). Some of these areas, like Creston and Fort Nelson, do not observe DST and stay on UTC-7 year-round.
- Mexico: The state of Sonora (Hermosillo) is on UTC-7 all year. Baja California Sur (Mazatlan) and Chihuahua (Ciudad Juarez) use UTC-7 in winter only, switching to UTC-6 in summer.
- United States: The Mountain Time Zone states (Colorado, Montana, New Mexico, Utah, Wyoming, etc.) use UTC-7 in winter. Arizona (Phoenix) and the Navajo Nation (which does observe DST) are special: most of Arizona is on UTC-7 all year, while the Navajo Nation follows DST and moves to UTC-6 in summer. The Pacific Time Zone (California, Washington, Oregon, Nevada) uses UTC-7 in summer.
Practical Scheduling Notes
When scheduling across UTC-7, remember that the offset can represent either MST (winter) or PDT (summer). A meeting at 10:00 UTC-7 in January is 10:00 MST, but in July it is 10:00 PDT. If you are coordinating with a city that observes DST, check the local date. For example, Denver and Phoenix both use UTC-7 in January, but in July Denver is at UTC-6 and Phoenix remains at UTC-7, creating a one-hour difference. Military and aviation use the letter 'T' (Tango) for UTC-7. UTC and GMT read the same on clocks, so UTC-7 is also GMT-7 for practical purposes.
Year-Round UTC-7 Regions
Some areas never leave UTC-7: most of Arizona (except the Navajo Nation), Sonora (Mexico), and the Canadian communities of Creston, Dawson Creek, and Fort Nelson. These places do not observe DST, making them reliable references for UTC-7 throughout the year.
Frequently Asked Questions
What is the difference between UTC-7 and Mountain Standard Time (MST)?
MST is a named time zone that uses UTC-7 during standard time (winter). However, MST switches to Mountain Daylight Time (MDT, UTC-6) in summer. UTC-7 is a fixed offset that does not change. So MST is only at UTC-7 for part of the year.
Which major cities are always on UTC-7?
Phoenix, Arizona (USA) and Hermosillo, Sonora (Mexico) are two major cities that stay on UTC-7 year-round because they do not observe daylight saving time.
If it is 12:00 UTC, what time is it in Denver?
It depends on the season. In winter (standard time), Denver is at UTC-7, so it is 05:00. In summer (daylight time), Denver is at UTC-6, so it is 06:00.
Does the entire state of Arizona use UTC-7 year-round?
No. Most of Arizona does not observe DST and stays on UTC-7. However, the Navajo Nation, which lies partly in Arizona, does observe DST and switches to UTC-6 in summer.
What is the military letter for UTC-7?
The military and aviation time zone letter for UTC-7 is 'T' (Tango).
Is UTC-7 the same as GMT-7?
Yes, for practical timekeeping purposes, UTC and GMT are interchangeable. So UTC-7 is the same as GMT-7.