Mountain time
1
- the standard time in a zone including parts of Canada and the US in or near the Rocky Mountains, specifically山地时间（邻近落基山山脉的加拿大和美国部分地区的标准时间）, 具体指：
1.1
- （Mountain Standard Time 缩略词： MST）standard time based on the mean solar time at the meridian 105°W., seven hours behind GMT.山地标准时间。
1.2
- （Mountain Daylight Time缩略词： MDT）Mountain time during daylight saving, six hours behind GMT.山地夏令时间。