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. state of New Mexico, are located almost entirely in this time zone.Įffective 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. The name of the time zone refers to the fact that the Rocky Mountains, which range from northwestern Canada to the U.S. Specifically, it is Mountain Standard Time during winter, and Mountain Daylight Time when daylight saving time is observed. In the United States and Canada, Mountain Time Zone is generically called Mountain Time (MT). 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 Daylight Time (MDT) refers to time where six hours are subtracted from GMT (UTC/GMT -6). The clock time in this zone is based on the mean solar time of the 105th meridian west of the Greenwich Observatory. This is called Mountain Standard Time (MST). This time zone is in use, but not observed in any location at this time.The Mountain Time Zone refers to time zone which observes time where seven hours are subtracted from GMT (UTC/GMT -7).
To convert MDT to PDT, you have to subtract one hour.
To convert MDT to EDT, you have to add two hours. Mountain Daylight Time (MDT) is 2 hours behind Eastern Daylight Time (EDT).Converting Mountain Time to Other US Time Zones Most North American time zones also have generic terms, including Pacific Time (PT), Central Time (CT), Eastern Time (ET), and Atlantic Time (AT). This can add a bit of confusion as the term Mountain Time does not differentiate between standard time and Daylight Saving Time, so Mountain Time switches between MST and MDT in areas that use DST during part of the year.
In everyday usage, MDT is often referred to as Mountain Time (MT) or the Mountain Time Zone. Mountain Standard Time (MST) is used during the remainder of the year. Mountain Daylight Time (MDT) is a North American time zone in use from the second Sunday in March to the first Sunday in November during Daylight Saving Time (DST). In North America, Mountain Daylight Time shares a border with Central Daylight Time (CDT) in the east and with Pacific Daylight Time (PDT) in the west. The MST time zone is the least populated time zone in the USA. It covers all or parts of 13 states in the US and five provinces or territories in Canada. Mountain Daylight Time is the second westernmost time zone in the United States and Canada.
Mdt vs.mst full#
See full time zone map What Is Mountain Daylight Time? This time zone is a Daylight Saving Time time zone and is used in: North America. Mountain Daylight Time (MDT) is 6 hours behind Coordinated Universal Time (UTC). Observes MDT – Mountain Daylight Time part of the year, but not currently.Ĭurrently has same time zone offset as MDT (UTC -6) but different time zone name. No locations are currently on MDT – Mountain Daylight Time. Business Date to Date (exclude holidays).