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Time in Arizona. Arizona highway sign with notice for travelers about local time standard. Time in Arizona, as in all U.S. states, is regulated by the United States Department of Transportation [ 1] as well as by state and tribal law. All of Arizona is in the Mountain Time Zone. [ 2] Since 1968, most of the state—except the Navajo Nation ...
In the United States, time is divided into nine standard time zones covering the states, territories and other US possessions, with most of the country observing daylight saving time (DST) for approximately the spring, summer, and fall months. The time zone boundaries and DST observance are regulated by the Department of Transportation, but no ...
UTC−07:00. UTC−07:00 is an identifier for a time offset from UTC of −07:00. In North America, it is observed in the Mountain Time Zone during standard time, and in the Pacific Time Zone during the other eight months (see Daylight saving time ). Some locations use it year-round.
The Uniform Time Act of 1966 established a uniform set of rules for states opting to observe daylight saving time. [ 1] In the U.S., daylight saving time starts on the second Sunday in March and ends on the first Sunday in November, with the time changes taking place at 2:00 a.m. local time. With a mnemonic word play referring to seasons ...
The tz database partitions the world into regions where local clocks all show the same time. This map was made by combining version 2023d with OpenStreetMap data, using open source software. [ 1] This is a list of time zones from release 2024a of the tz database. [ 2]
Prior to the nationwide implementation of DST in 1967, some American states observed permanent Standard Time. [7] Currently in the US, Arizona (with the exception of the Navajo Nation), Hawaii, and all permanently inhabited territories (American Samoa, Guam, the Northern Mariana Islands, Puerto Rico, and the Virgin Islands) observe permanent standard time. [8]
Such designations can be ambiguous; for example, "CST" can mean China Standard Time (UTC+8), Cuba Standard Time (UTC−5), and (North American) Central Standard Time (UTC−6), 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 an earlier ...
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.