noun
Mountain Standard Time; MST
North American time zone, UTC-7. Often abbreviated as MST. Compare with 山岳部標準時, which is a longer form.
See also: 山岳部標準時 (さんがくぶひょうじゅんじ)
山岳標準時は協定世界時より7時間遅れている。
Mountain Standard Time is seven hours behind Coordinated Universal Time.
Longer form with 部, also meaning Mountain Standard Time. 山岳標準時 is a shorter variant.
Compound of 山岳 (mountain) + 標準時 (standard time), calque of English 'Mountain Standard Time'.