AST to UTC Time Converter

Convert Atlantic Standard Time (AST) to Coordinated Universal Time (UTC). Both time zones are shown live below; current offset between them is 3 hours ahead.

Halifax · Atlantic Standard Time
20:14:50
Monday, May 11, 2026
ADT · UTC-03:00
UTC · Coordinated Universal Time
23:14:50
Monday, May 11, 2026
UTC · UTC+00:00

Convert a specific time

From: AST (Halifax)
To: UTC (UTC)
--:--

Daylight Saving status right now

AST (Atlantic Standard Time)
Observes DST
Yes
In DST right now
Yes
Next fall back
2026-11-01
Offset shift
UTC-03:00 → UTC-04:00
UTC (Coordinated Universal Time)
Observes DST
No

Heads up: AST observes DST while UTC does not. The 3-hour difference shown above will shift by one hour when AST starts or ends DST.

When can AST and UTC meet?

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AST
UTC
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in Halifax (AST). Each row shows the local working-hours state in that zone for the same moment in time.
5 hours of overlap during standard 9am-5pm working hours.
Best meeting window: 09:00–13:00 AST (12:00–16:00 UTC).

Hour-by-hour AST to UTC conversion table

AST time (Halifax)UTC time (UTC)Status
00:00 Mon03:00 MonOff-hours both sides
01:00 Mon04:00 MonOff-hours both sides
02:00 Mon05:00 MonOff-hours both sides
03:00 Mon06:00 MonOff-hours both sides
04:00 Mon07:00 MonOff-hours both sides
05:00 Mon08:00 MonOff-hours both sides
06:00 Mon09:00 MonUTC working
07:00 Mon10:00 MonUTC working
08:00 Mon11:00 MonUTC working
09:00 Mon12:00 MonBoth at work
10:00 Mon13:00 MonBoth at work
11:00 Mon14:00 MonBoth at work
12:00 Mon15:00 MonBoth at work
13:00 Mon16:00 MonBoth at work
14:00 Mon17:00 MonAST working
15:00 Mon18:00 MonAST working
16:00 Mon19:00 MonAST working
17:00 Mon20:00 MonOff-hours both sides
18:00 Mon21:00 MonOff-hours both sides
19:00 Mon22:00 MonOff-hours both sides
20:00 Mon23:00 MonOff-hours both sides
21:00 Mon00:00 TueOff-hours both sides
22:00 Mon01:00 TueOff-hours both sides
23:00 Mon02:00 TueOff-hours both sides

Times computed for today in each zone using the IANA time zone database. The conversion accounts for daylight saving time wherever applicable.

About these time zones

Atlantic Standard Time (AST)
IANA identifier
America/Halifax
Current UTC offset
UTC-03:00
Current abbreviation
ADT
Major cities in this zone
Halifax
Coordinated Universal Time (UTC)
IANA identifier
UTC
Current UTC offset
UTC+00:00
Current abbreviation
UTC
Major cities in this zone
UTC

Related converters

UTC to AST (reverse)AST to ESTAST to PSTAST to GMTAST to CETAST to ISTEST to UTCPST to UTCGMT to UTCCET to UTCIST to UTC
Looking for local time? See time in Halifax or time in UTC.

Frequently asked questions

What is the time difference between AST and UTC right now?+
UTC (Coordinated Universal Time) is currently 3 hours ahead AST (Atlantic Standard Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does AST or UTC observe daylight saving time?+
AST: observes daylight saving time. UTC: does not observe daylight saving time.
When is the best time to schedule a meeting between AST and UTC?+
The strongest overlap is 09:00–13:00 AST (12:00–16:00 UTC), giving 5 hours when both sides are within standard 9am-5pm working hours.
What time is it in UTC when it is 12:00 noon in Halifax?+
When it is 12:00 Mon in Halifax (AST), it is 15:00 Mon in UTC (UTC).
Which IANA time zone identifiers are used for AST and UTC?+
AST maps to "America/Halifax" in the IANA database. UTC maps to "UTC". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is Halifax ahead of or behind UTC?+
Whether Halifax (AST) is ahead of or behind UTC (UTC) depends on the current UTC offsets. Right now UTC is 3 hours ahead AST. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for AST and UTC?+
AST is UTC-03:00 (ADT) and UTC is UTC+00:00 (UTC). Both offsets shift by one hour when the corresponding region enters or exits daylight saving time, so the live values on this page are the source of truth.
Can I schedule meetings during business hours for both AST and UTC?+
Yes. There are 5 hours of overlap during standard 9am-5pm working hours, with the strongest window at 09:00–13:00 AST.