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In practice, since the late 1960s DST across Canada has been closely or completely synchronized with its observance in the United States to promote consistent economic and social interaction. When the United States extended DST in 1987 to the first Sunday in April, all DST-observing Canadian provinces followed suit to mimic the change.
Standard time zones in the United States and other regions are currently defined at the federal level by statute 15 U.S.C. § 260. The federal law also establishes the transition dates and times at which daylight saving time occurs, with federal law making its observation dependent on state or tribal law.
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 ...
The Eastern Time Zone (ET) is a time zone encompassing part or all of 23 states in the eastern part of the United States, parts of eastern Canada, and the state of Quintana Roo in Mexico. Eastern Standard Time ( EST ) is five hours behind Coordinated Universal Time ( UTC−05:00 ).
Daylight saving time (DST), also referred to as daylight saving(s), daylight savings time, daylight time (United States and Canada), or summer time (United Kingdom, European Union, and others), is the practice of advancing clocks to make better use of the longer daylight available during summer so that darkness falls at a later clock time.
List of time zones by country – sorted by number of current time zones in the world; List of UTC offsets – current UTC offsets; List of time zone abbreviations – abbreviations; List of tz database time zones – zones used by many computer systems as defined by IANA; List of military time zones; Country-specific: List of time zones by U.S ...
Canada (Pacific Time Zone) [7] British Columbia Except Northern Rockies Regional Municipality, Peace River Regional District, and the southeastern communities of Cranbrook, Golden and Invermere [2] Mexico Baja California [4] United States (Pacific Time Zone) [5] California; Idaho North of Salmon River [6] Nevada (except West Wendover) Oregon
Time zones of the world. A time zone is an area which observes a uniform standard time for legal, commercial and social purposes. Time zones tend to follow the boundaries between countries and their subdivisions instead of strictly following longitude, because it is convenient for areas in frequent communication to keep the same time.