AST to PST Time Converter

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

Halifax · Atlantic Standard Time
17:10:35
Tuesday, May 12, 2026
ADT · UTC-03:00
Los Angeles · Pacific Standard Time
13:10:35
Tuesday, May 12, 2026
PDT · UTC-07:00

Convert a specific time

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

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
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

When can AST and PST 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
AST
PST
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.
4 hours of overlap during standard 9am-5pm working hours.
Best meeting window: 13:00–16:00 AST (09:00–12:00 PST).

Hour-by-hour AST to PST conversion table

AST time (Halifax)PST time (Los Angeles)Status
00:00 Tue20:00 MonOff-hours both sides
01:00 Tue21:00 MonOff-hours both sides
02:00 Tue22:00 MonOff-hours both sides
03:00 Tue23:00 MonOff-hours both sides
04:00 Tue00:00 TueOff-hours both sides
05:00 Tue01:00 TueOff-hours both sides
06:00 Tue02:00 TueOff-hours both sides
07:00 Tue03:00 TueOff-hours both sides
08:00 Tue04:00 TueOff-hours both sides
09:00 Tue05:00 TueAST working
10:00 Tue06:00 TueAST working
11:00 Tue07:00 TueAST working
12:00 Tue08:00 TueAST working
13:00 Tue09:00 TueBoth at work
14:00 Tue10:00 TueBoth at work
15:00 Tue11:00 TueBoth at work
16:00 Tue12:00 TueBoth at work
17:00 Tue13:00 TuePST working
18:00 Tue14:00 TuePST working
19:00 Tue15:00 TuePST working
20:00 Tue16:00 TuePST working
21:00 Tue17:00 TueOff-hours both sides
22:00 Tue18:00 TueOff-hours both sides
23:00 Tue19:00 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
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

Sun today in Halifax and Los Angeles

Los Angeles
Sunrise
05:55
Sunset
19:46
Solar noon
12:50
Daylight
13h 51m

Related converters

PST to AST (reverse)AST to ESTAST to GMTAST to UTCAST to CETAST to ISTEST to PSTGMT to PSTUTC to PSTCET to PSTIST to PST
Looking for local time? See time in Halifax or time in Los Angeles.

Frequently asked questions

What is the time difference between AST and PST right now?+
PST (Pacific Standard Time) is currently 4 hours behind 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 PST observe daylight saving time?+
AST: observes daylight saving time. PST: observes daylight saving time.
When is the best time to schedule a meeting between AST and PST?+
The strongest overlap is 13:00–16:00 AST (09:00–12:00 PST), giving 4 hours when both sides are within standard 9am-5pm working hours.
What time is it in Los Angeles when it is 12:00 noon in Halifax?+
When it is 12:00 Tue in Halifax (AST), it is 08:00 Tue in Los Angeles (PST).
Which IANA time zone identifiers are used for AST and PST?+
AST maps to "America/Halifax" in the IANA database. PST maps to "America/Los_Angeles". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is Halifax ahead of or behind Los Angeles?+
Whether Halifax (AST) is ahead of or behind Los Angeles (PST) depends on the current UTC offsets. Right now PST is 4 hours behind AST. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for AST and PST?+
AST is UTC-03:00 (ADT) and PST is UTC-07:00 (PDT). 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 PST?+
Yes. There are 4 hours of overlap during standard 9am-5pm working hours, with the strongest window at 13:00–16:00 AST.