PST to AST Time Converter

Convert Pacific Standard Time (PST) to Atlantic Standard Time (AST). Both time zones are shown live below; current offset between them is 4 hours ahead.

Los Angeles · Pacific Standard Time
03:19:04
Wednesday, May 13, 2026
PDT · UTC-07:00
Halifax · Atlantic Standard Time
07:19:04
Wednesday, May 13, 2026
ADT · UTC-03:00

Convert a specific time

From: PST (Los Angeles)
To: AST (Halifax)
--:--

Daylight Saving status right now

PST (Pacific Standard Time)
Observes DST
Yes
In DST right now
Yes
Next fall back
2026-11-01
Offset shift
UTC-07:00 → UTC-08:00
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

When can PST and AST meet?

00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
PST
AST
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in Los Angeles (PST). Each row shows the local working-hours state in that zone for the same moment in time.
4 hours of overlap during standard 9am-5pm working hours.
Best meeting window: 09:00–12:00 PST (13:00–16:00 AST).

Hour-by-hour PST to AST conversion table

PST time (Los Angeles)AST time (Halifax)Status
00:00 Wed04:00 WedOff-hours both sides
01:00 Wed05:00 WedOff-hours both sides
02:00 Wed06:00 WedOff-hours both sides
03:00 Wed07:00 WedOff-hours both sides
04:00 Wed08:00 WedOff-hours both sides
05:00 Wed09:00 WedAST working
06:00 Wed10:00 WedAST working
07:00 Wed11:00 WedAST working
08:00 Wed12:00 WedAST working
09:00 Wed13:00 WedBoth at work
10:00 Wed14:00 WedBoth at work
11:00 Wed15:00 WedBoth at work
12:00 Wed16:00 WedBoth at work
13:00 Wed17:00 WedPST working
14:00 Wed18:00 WedPST working
15:00 Wed19:00 WedPST working
16:00 Wed20:00 WedPST working
17:00 Wed21:00 WedOff-hours both sides
18:00 Wed22:00 WedOff-hours both sides
19:00 Wed23:00 WedOff-hours both sides
20:00 Wed00:00 ThuOff-hours both sides
21:00 Wed01:00 ThuOff-hours both sides
22:00 Wed02:00 ThuOff-hours both sides
23:00 Wed03:00 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

Pacific Standard Time (PST)
IANA identifier
America/Los_Angeles
Current UTC offset
UTC-07:00
Current abbreviation
PDT
Major cities in this zone
Los AngelesSan FranciscoSeattlePortlandSan Diego
Atlantic Standard Time (AST)
IANA identifier
America/Halifax
Current UTC offset
UTC-03:00
Current abbreviation
ADT
Major cities in this zone
Halifax

Sun today in Los Angeles and Halifax

Los Angeles
Sunrise
05:54
Sunset
19:47
Solar noon
12:50
Daylight
13h 52m

Related converters

AST to PST (reverse)PST to ESTPST to GMTPST to UTCPST to CETPST to ISTEST to ASTGMT to ASTUTC to ASTCET to ASTIST to AST
Looking for local time? See time in Los Angeles or time in Halifax.

Frequently asked questions

What is the time difference between PST and AST right now?+
AST (Atlantic Standard Time) is currently 4 hours ahead PST (Pacific Standard Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does PST or AST observe daylight saving time?+
PST: observes daylight saving time. AST: observes daylight saving time.
When is the best time to schedule a meeting between PST and AST?+
The strongest overlap is 09:00–12:00 PST (13:00–16:00 AST), giving 4 hours when both sides are within standard 9am-5pm working hours.
What time is it in Halifax when it is 12:00 noon in Los Angeles?+
When it is 12:00 Wed in Los Angeles (PST), it is 16:00 Wed in Halifax (AST).
Which IANA time zone identifiers are used for PST and AST?+
PST maps to "America/Los_Angeles" 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 Los Angeles ahead of or behind Halifax?+
Whether Los Angeles (PST) is ahead of or behind Halifax (AST) depends on the current UTC offsets. Right now AST is 4 hours ahead PST. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for PST and AST?+
PST is UTC-07:00 (PDT) 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 PST and AST?+
Yes. There are 4 hours of overlap during standard 9am-5pm working hours, with the strongest window at 09:00–12:00 PST.