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AST – Atlantic Standard Time

Current Offset:UTC-3(Daylight Time Active)

Timezone Overview

Atlantic Standard Time (AST) is a time standard used across the North America region. The current local UTC offset is UTC-3. This timezone participates in seasonal clock adjustments: the standard offset is UTC-4 and the daylight saving offset is UTC-3. The zone is currently observing daylight saving time.

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AST Timezone Details

Abbreviation
AST
Standard Offset
UTC-4
Current Offset
UTC-3
Daylight Offset
UTC-3
DST Status
Active (Daylight)
IANA Identifier
America/Halifax
Region
North America
Clock Changes
Seasonal (2x/year)

Daylight Saving Time (DST) Information

Atlantic Standard Time (AST) participates in daylight saving time adjustments. During the standard time period, clocks operate at UTC-4, and during the daylight saving period, clocks advance by 1 hour to UTC-3.

Standard Time
UTC-4
AST
Daylight Saving Time
UTC-3
AST

Specific changeover dates depend on jurisdictional regulations. In North America transitions generally take place in March and November, in Europe transitions occur in late March and late October, and Southern Hemisphere zones transition between October and April.

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Major Cities in AST Time

Representative cities currently observing Atlantic Standard Time (AST) with their live local times.

1 city listed
CityCountryCurrent TimeCurrent Offset
HalifaxCanada3:19 AMUTC-3

Countries & Territories Represented

Canada

Other North America Timezones

EST
UTC-5
EDT
UTC-4
CST
UTC-6
CDT
UTC-5
MST
UTC-7
MDT
UTC-6

Frequently Asked Questions about AST

Accurate, factual answers regarding Atlantic Standard Time (AST) and its seasonal schedule.

What is AST and what does it stand for?

AST stands for Atlantic Standard Time. It is a civil time standard used in North America with a standard offset of UTC-4 from Coordinated Universal Time (UTC). Its current offset is UTC-3.

Does AST observe Daylight Saving Time (DST)?

Yes, Atlantic Standard Time participates in seasonal daylight saving time shifts. Standard time is UTC-4 and daylight saving time is UTC-3. Clocks in this zone are currently advancing for daylight saving time.

Which major cities use AST?

Major cities operating in or aligned with Atlantic Standard Time include Halifax (Canada).

How do I convert AST to another timezone?

To convert AST (UTC-3) to your local time or another zone, calculate the hour difference between your local UTC offset and UTC-3. You can also use the live interactive converters listed on this page for instant side-by-side time comparisons.