Time zone difference: GMT to Mountain Time (MST/MDT) Time now in GMT and Mountain. Conversion tools and tables. All times shown observe local daylight saving time (DST) rules.
This Time Zone Calculator converts between different time zones. To determine time zones for various locations, use this page as a reference.
- Mountain Daylight Time (MDT) refers to time where six hours are subtracted from GMT.
- Mountain Standard Time (North America) is 7 hours behind from the UTC universal time. UTC to MST Time Conversion Table UTC to MST in 12-hour (AM/PM) time format. UTC to MST in 24-hour time format.
- Mountain Standard Time is 7 hours behind Coordinated Universal Time (UTC). Mountain Daylight Time is 6 hours behind UTC.
Utc To Mountain Time Converter
What is Time Zone
A time zone is a region on Earth that uses a uniform time. They are often based on boundaries of countries or lines of longitude. Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory located in Greenwich, London, considered to be located at a longitude of zero degrees. Although GMT and Coordinated Universal Time (UTC) essentially reflect the same time, GMT is a time zone, while UTC is a time standard that is used as a basis for civil time and time zones worldwide. Although GMT used to be a time standard, it is now mainly used as the time zone for certain countries in Africa and Western Europe. UTC, which is based on highly precise atomic clocks and the Earth's rotation, is the new standard of today.
UTC is not dependent on daylight saving time (DST), though some countries switch between time zones during their DST period, such as the United Kingdom using British Summer Time in the summer months.
Most time zones that are on land are offset from UTC. UTC breaks time into days, hours, minutes, and seconds, where days are usually defined in terms of the Gregorian calendar. Generally, time zones are defined as + or - an integer number of hours in relation to UTC; for example, UTC-05:00, UTC+08:00, and so on. UTC offset can range from UTC-12:00 to UTC+14:00. Most commonly, UTC is offset by an hour, but in some cases, the offset can be a half-hour or quarter-hour, such as in the case of UTC+06:30 and UTC+12:45.
World Time Zone Map
Time zones throughout the world vary, and used to vary even more than they currently do. It wasn't until 1929 before most countries adopted hourly time zones Nepal, the final holdout, did not adopt a standard offset of UTC until 1956, and even then, has a less common offset of UTC+5:45.
Generally, a time change of 1 hour is required with each 15° change of longitude, but this does not necessarily always happen. For example, China and India only use a single time zone even though they are countries that encompass far larger an area than 15° of longitude. Russia on the other hand, is divided into 11 time zones, though at one point this was reduced to 9 time zones. As can be seen, although there is a general standard throughout the world for defining time zones, it is still highly dependent on the country, and is subject to change.
The following map displays the standard time zones across the world. Click the map to enlarge it.
U.S. Time Zone Map
Many countries have more than one time zone. As a general rule of thumb, a change of 15° of longitude should result in a time difference of 1 hour.
In the U.S., there are a total of 9 time zones used. Likely the most well known include Eastern, Central, Mountain, and Pacific Time Zones. These time zones encompass most of the contiguous United States.
- Eastern Time Zone (ET): UTC-05:00 – includes 22 states in the eastern part of the contiguous United States, including some parts of Canada, Mexico, Panama, and the Caribbean islands.
- Central Time Zone (CT): UTC-06:00 – includes parts of Canada, the U.S., Mexico, Central America, some of the Caribbean islands, and parts of the Eastern Pacific Ocean. Only 9 states are fully within the Central Time Zone. Eleven are shared with either the Mountain Time Zones or the Eastern Time zones.
- Mountain Time Zone (MT): UTC-07:00 – includes parts of Canada, Mexico, and the U.S. 5 states are fully within the MT, Ten are shared with either the Pacific Time Zone or the Central Time Zone.
- Pacific Time Zone (PT): UTC-08:00 – includes parts of Canada, the western U.S., and western Mexico. California and Washington are fully within PT. Three states are split between the Pacific Time Zone and the Mountain Time Zone, and Alaska is split between the Pacific Time Zone and Alaska Time Zone.
Atlantic, Alaska, Hawaii-Aleutian, Samoa, and Chamorro Time Zones cover the rest of the United States including Alaska, Hawaii, and the other U.S. territories.
All of these time zones have standard time zones that are offset from UTC from UTC-04:00 through UTC+10:00, though some additionally observe daylight saving time (DST). During DST, the regions that observe DST are offset one hour closer to UTC. The regions that don't observe DST include those in the Atlantic, Samoa, and Chamorro Time Zones.
Daylight Saving Time
Many countries or regions, especially those in Europe and North America practice daylight saving time (DST), sometimes referred to as 'summer time,' with the intent of saving energy. This typically involves advancing the time on a clock by one hour in early spring, and 'rolling back' the time in autumn. Manipulating the time as the seasons change can better synchronize working hours with sunrise and sunset times in certain areas. This is less relevant for higher altitude areas (where sunrise and sunset times are significantly offset with regular working hours regardless of time manipulation) as well as locations near the equator (since there is small variation in daylight throughout the year).
* This Time Zone Calculator does not consider Daylight Saving Time in its calculations.
The Mountain Time Zone refers to time zone which observes time where seven hours are subtracted from GMT (UTC/GMT -7). This is called Mountain Standard Time (MST). The clock time in this zone is based on the mean solar time of the 105th meridian west of the Greenwich Observatory.
Mountain Daylight Time (MDT) refers to time where six hours are subtracted from GMT (UTC/GMT -6). This time is used during the daylight saving time, which is observed throughout the sunnier months of the year, during the spring, summer and autumn.
Mountain Time (MT)
20:00 Utc To Mountain Time
In the United States and Canada, Mountain Time Zone is generically called Mountain Time (MT). Specifically, it is Mountain Standard Time during winter, and Mountain Daylight Time when daylight saving time is observed. The name of the time zone refers to the fact that the Rocky Mountains, which range from northwestern Canada to the U.S. state of New Mexico, are located almost entirely in this time zone.
Effective since 2007, the local time changes from MST 02:00 to MDT 03:00 on the second Sunday in March and returns to MST at 02:00 MDT to 01:00 MST on the first Sunday in November.
Most of Arizona does not observe daylight saving time, and during the spring, summer, and autumn months, it is on the same time as Pacific Daylight Time, though it is still called Mountain Standard Time in Arizona. The Navajo Nation, most of which lies within Arizona, does observe daylight saving time, although the Hopi Nation, as well as some Arizona state offices lying within the Navajo Nation, do not.
Daylight Saving Time Information
The Beginning and end dates of the daylight saving time in the United States and in Canada. Daylight saving time starting and ending dates are mostly different in Mexico comparing to Canada and the USA dates which are presented here. A few Mexican border cities follow the USA daylight saving times.
Daylight saving time start and and dates in Canada and in the USA.
North American Time Zones
The time zones in North America, in the west from Hawaii and Alaska to the east cost of USA and Canada and all the way to Nova Scotia and Newfoundaland.
|Hours from UTC/GMT||Standard Time||Daylight Saving Time|
8am Utc To Mountain Time
Convert Mountain Time To Utc
Time zones in North America.
GMT and UTC
Utc To Mountain Time
Greenwich Mean Time (GMT) is originally referring to mean solar time at the Royal Observatory in Greenwich, London. GMT and Coordinated Universal Time (UTC) can be seen equivalent when fractions of a second are not important.