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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.
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 ...
Turks and Caicos discontinued Daylight Saving Time in March 2015, at the same time moving from the Eastern Time Zone to the Atlantic Time Zone, the result being the same as having year-round Daylight Saving in the Eastern Time Zone. In 2018, the islands reintroduced daylight saving time by setting the clocks back 1 hour to Eastern Standard Time ...
Central (Kenton observes Mountain time on a de facto basis) Oregon: UTC−07:00 MT Yes Northern 80% of Malheur County: UTC−07:00 MST Mountain Standard Time UTC−08:00 PT Most of state: UTC−08:00 PST Pacific Standard Time Pennsylvania: UTC−05:00 ET: Yes: Eastern Puerto Rico: UTC−04:00 AT: No: Atlantic Standard Time Rhode Island: UTC− ...
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).
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 2025a of the tz database. [2]
Asti, Italian province and city (was traditionally Ast in the Piemontese dialect) Assured shorthold tenancy, UK; Asturian language (ISO 639 alpha-3: ast), Spain; Astana Pro Team (UCI code AST), a professional road bicycle racing team; Georg Anton Friedrich Ast, German philosopher and philologist (1778–1841) Pat Ast, American actress and model ...
Time in Saint Lucia; Time zone: Atlantic Standard Time: Initials: AST: UTC offset: UTC−4: Daylight saving time; DST not observed: tz database; America/Port of Spain: