UTC to AST Time Converter

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

UTC · Coordinated Universal Time
14:35:28
Thursday, May 14, 2026
UTC · UTC+00:00
Halifax · Atlantic Standard Time
11:35:28
Thursday, May 14, 2026
ADT · UTC-03:00

Convert a specific time

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

Daylight Saving status right now

UTC (Coordinated Universal Time)
Observes DST
No
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

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 UTC and AST meet?

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01
02
03
04
05
06
07
08
09
10
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12
13
14
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16
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18
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23
UTC
AST
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in UTC (UTC). 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: 12:00–16:00 UTC (09:00–13:00 AST).

Hour-by-hour UTC to AST conversion table

UTC time (UTC)AST time (Halifax)Status
00:00 Thu21:00 WedOff-hours both sides
01:00 Thu22:00 WedOff-hours both sides
02:00 Thu23:00 WedOff-hours both sides
03:00 Thu00:00 ThuOff-hours both sides
04:00 Thu01:00 ThuOff-hours both sides
05:00 Thu02:00 ThuOff-hours both sides
06:00 Thu03:00 ThuOff-hours both sides
07:00 Thu04:00 ThuOff-hours both sides
08:00 Thu05:00 ThuOff-hours both sides
09:00 Thu06:00 ThuUTC working
10:00 Thu07:00 ThuUTC working
11:00 Thu08:00 ThuUTC working
12:00 Thu09:00 ThuBoth at work
13:00 Thu10:00 ThuBoth at work
14:00 Thu11:00 ThuBoth at work
15:00 Thu12:00 ThuBoth at work
16:00 Thu13:00 ThuBoth at work
17:00 Thu14:00 ThuAST working
18:00 Thu15:00 ThuAST working
19:00 Thu16:00 ThuAST working
20:00 Thu17:00 ThuOff-hours both sides
21:00 Thu18:00 ThuOff-hours both sides
22:00 Thu19:00 ThuOff-hours both sides
23:00 Thu20:00 ThuOff-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

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

Related converters

AST to UTC (reverse)UTC to ESTUTC to PSTUTC to GMTUTC to CETUTC to ISTEST to ASTPST to ASTGMT to ASTCET to ASTIST to AST
Looking for local time? See time in UTC or time in Halifax.

Frequently asked questions

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