Currently observing MST â Mountain Standard Time. Currently has same time zone offset as MST (UTC -7) but different time zone name. Mountain Standard Time (MST) is 7 hours behind Coordinated Universal Time (UTC). This time zone is in use during standard time in: North America. This time zone is often called Mountain Time Zone. See full time zone map. Summer Time & DST. Some places observe daylight saving time/summer time during the summer, and therefore use MDT (Mountain Daylight Time) in the summer. Email Time Zone Indicator: -0700