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In the United States and Canada, the Mountain Time Zone is to the east of the Pacific Time Zone and to the west of the Central Time Zone. In some areas, starting in 2007, the local time changes from MST to MDT at 2 am MST to 3 am MDT on the second Sunday in March and returns at 2 am MDT to 1 am MST on the first Sunday in November.
Such designations can be ambiguous; for example, "CST" can mean China Standard Time (UTC+08:00), Cuba Standard Time (UTC−05:00), and (North American) Central Standard Time (UTC−06:00), and it is also a widely used variant of ACST (Australian Central Standard Time, UTC+9:30). Such designations predate both ISO 8601 and the internet era; in ...
United States (Mountain Time Zone) [5] Arizona – Navajo Nation only (most of Arizona uses MST year-round) Colorado; Idaho [6] South of Salmon River; Kansas. Western counties of Greeley, Hamilton, Sherman and Wallace; Montana; Nebraska. Western counties of Cherry (western part), Hooker, Arthur, Keith, Perkins, Chase and Dundy, and all counties ...
Standard Time (SDT) and Daylight Saving Time (DST) offsets from UTC in hours and minutes. For zones in which Daylight Saving is not observed, the DST offset shown in this table is a simple duplication of the SDT offset.
Hawaii stays on Hawaiian Standard time year round, Arizona stays on Mountain Standard time year round except for the Navajo Nation which observes Mountain Daylight Time (MDT). Since 2007, in areas of Canada and the United States in which it is used, daylight saving time begins on the second Sunday of March and ends on the first Sunday of November.
In 1912, the first law was passed that called for the use of standard time.This law left the choice of time zone up to the municipal government. The result was a patchwork of towns following either of the two neighbouring time zones—Mountain Standard Time (MST) or Central Standard Time—with or without daylight saving time.
America/Hermosillo Sonora −07:00 −07:00 MST MX +2313−10625 America/Mazatlan Baja California Sur, Nayarit (most areas), Sinaloa −07:00 −07:00 MST MX +3144−10629 America/Ciudad_Juarez Chihuahua (US border - west) −07:00 −06:00 MST MDT Follows U.S. DST rules [a] MX +2838−10605 America/Chihuahua Chihuahua (most areas) −06:00 − ...
Yukon Standard Time is the informal name of a time zone established in 2020 and used in the territory of Yukon in Canada. "Yukon Standard Time" is more formally referred to as year-round Mountain Standard Time (MST) but unlike other Mountain Time (MT, or MST/MDT) regions it does not observe daylight saving time, giving it a year-round calculation by subtracting seven hours from Coordinated ...