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Eastern Maine has the earliest solar noon of the contiguous United States, and the portion of the state that is east of 67.5°W longitude is geographically in the Atlantic Time Zone, which is used by adjacent New Brunswick, Canada. Independent of daylight saving time, solar noon at the March equinox is approximately 11:50 in the southwestern ...
State federal district or territory Time Offsets DST Details Map Alabama: UTC−06:00 CT: Yes: Central Standard Time (Phenix City observes Eastern time on a de facto basis) Alaska: UTC−09:00 AKT Yes Most of state: UTC−09:00 AKST Alaska Standard Time: UTC−10:00 HT Aleutian Islands (west of 169°30' W): UTC−10:00 HST Hawaii–Aleutian ...
The Atlantic Time Zone is a geographical region that keeps standard time—called Atlantic Standard Time (AST)—by subtracting four hours from Coordinated Universal Time , resulting in UTC−04:00. AST is observed in parts of North America including several Caribbean islands.
Atlantic Standard Time (AST) UTC−04:00 and Atlantic Daylight Time (ADT) UTC−03:00: Labrador (all but the southeastern tip) New Brunswick; Nova Scotia; Prince Edward Island; Quebec (Magdalen Islands and Listuguj Mi'gmaq First Nation) [23] Atlantic Standard Time (AST) UTC−04:00 year-round: Quebec (east of the Natashquan River) [23]
Canada (Pacific Time Zone) [10] British Columbia. Except Northern Rockies Regional Municipality, Peace River Regional District, and the south-eastern communities of Cranbrook, Golden and Invermere [11] France [12] Clipperton Island; Mexico. Baja California [13] United Kingdom. Pitcairn Islands; United States (Pacific Time Zone) [14] California ...
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.
UTC−04:00 is an identifier for a time offset from UTC of −04:00. It is observed in the Eastern Time Zone (e.g., in Canada and the United States) during the warm months of daylight saving time, as Eastern Daylight Time. The Atlantic Time Zone observes it during standard time (cold months).
Time zones were therefore a compromise, relaxing the complex geographic dependence while still allowing local time to be approximate with mean solar time. Railroad managers tried to address the problem by establishing 100 railroad time zones, but this was only a partial solution to the problem. [2]