Mountain Standard Time
Mountain Standard Time proper noun: the time zone that encompasses most areas around the Rocky Mountains in the United States (except most of Arizona outside the Navajo Nation), Alberta, the cross-border city of Lloydminster and its surrounding rural municipalities in Saskatchewan, the Northwest Territories, southeastern British Columbia and the western third of Nunavut in Canada from the first Sunday of November to the second Sunday of March, and the states of Baja California Sur, Chihuahua (majority), Nayarit, Sinaloa and Sonora in Mexico year round; it is seven hours behind Coordinated Universal Time (UTC-7).
Proper noun
Mountain Standard Time
- The time zone that encompasses most areas around the Rocky Mountains in the United States (except most of Arizona outside the Navajo Nation), Alberta, the cross-border city of Lloydminster and its surrounding rural municipalities in Saskatchewan, the Northwest Territories, southeastern British Columbia and the western third of Nunavut in Canada from the first Sunday of November to the second Sunday of March, and the states of Baja California Sur, Chihuahua (majority), Nayarit, Sinaloa and Sonora in Mexico year round; it is seven hours behind Coordinated Universal Time (UTC-7).
- Synonyms:
- MST
Synonyms of Mountain Standard Time
Questions about Mountain Standard Time
- What does Mountain Standard Time mean?
- Mountain Standard Time means the time zone that encompasses most areas around the Rocky Mountains in the United States (except most of Arizona outside the Navajo Nation), Alberta, the cross-border city of Lloydminster and its surrounding rural municipalities in Saskatchewan, the Northwest Territories, southeastern British Columbia and the western third of Nunavut in Canada from the first Sunday of November to the second Sunday of March, and the states of Baja California Sur, Chihuahua (majority), Nayarit, Sinaloa and Sonora in Mexico year round; it is seven hours behind Coordinated Universal Time (UTC-7).
- What part of speech is Mountain Standard Time?
- Mountain Standard Time is a proper noun.
Words near Mountain Standard Time in the dictionary
Source and license
Adapted from Wiktionary: Mountain Standard Time (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.
Last updated:
Cite this entry: “Mountain Standard Time.” Word.ws, https://word.ws/mountain_standard_time. Based on Wiktionary, CC BY-SA 4.0.