PST to AST Time — Convert Pacific Standard Time (US) to Atlantic Standard Time

AST is currently 4 hours ahead of PST.

On Clockjumper, PST refers to Pacific Standard Time in the United States (UTC−8). The US West Coast observes PST in winter and switches to PDT (UTC−7) during daylight saving time.

On Clockjumper, AST refers to Atlantic Standard Time in Atlantic Canada and the Caribbean (UTC−4). The same letters are also used for Arabia Standard Time (UTC+3) — check the city or UTC offset to be sure which is meant.

The PST → AST offset stays constant across the year — neither zone shifts for daylight saving in a way that changes this gap.

Is AST ahead of or behind PST right now?

AST is currently 4 hours ahead of PST.

What is the current PST to AST time difference?

Right now the gap is 4 hours — AST is 4 hours ahead of PST.

Does the PST → AST offset change during the year?

No. Neither Pacific Standard Time (US) nor Atlantic Standard Time shifts for daylight saving in a way that changes this offset — the gap is the same all year.

Does PST observe daylight saving time?

PST is itself the standard-time form. Pacific Standard Time (US) is in force at UTC-8 through the winter months; outside that window the same zone is on PDT (UTC-7).

Does AST observe daylight saving time?

AST is itself the standard-time form. Atlantic Standard Time is in force at UTC-4 through the winter months; outside that window the same zone is on ADT (UTC-3).

What time is 3 AM PST in AST?

3:00 AM PST is 7:00 AM AST.

What time is 8 AM PST in AST?

8:00 AM PST is 12:00 PM AST.

What time is 9 AM PST in AST?

9:00 AM PST is 1:00 PM AST.

What time is 10 AM PST in AST?

10:00 AM PST is 2:00 PM AST.

What time is 11 AM PST in AST?

11:00 AM PST is 3:00 PM AST.

What time is 12 PM (noon) PST in AST?

12:00 PM PST is 4:00 PM AST.

What time is 2 PM PST in AST?

2:00 PM PST is 6:00 PM AST.

What time is 3 PM PST in AST?

3:00 PM PST is 7:00 PM AST.

What time is 4 PM PST in AST?

4:00 PM PST is 8:00 PM AST.

What time is 5 PM PST in AST?

5:00 PM PST is 9:00 PM AST.

What time is 9 PM PST in AST?

9:00 PM PST is 1:00 AM (next day) AST.

What time is 10 PM PST in AST?

10:00 PM PST is 2:00 AM (next day) AST.

When is the best time to schedule a call between PST and AST?

The working-hours overlap (09:00–17:00 in both zones) runs roughly 9:00 AM – 1:00 PM PST (≈ 4 hours). The midpoint of that window — 11:00 AM PST, 3:00 PM AST — is the safest single slot to propose for a live call.

What time zone does PST refer to?

PST refers to Pacific Standard Time (US) (IANA: America/Los_Angeles).

What time zone does AST refer to?

AST refers to Atlantic Standard Time (IANA: America/Halifax).

Is PST on this page the same as other zones that share the letters "PST"?

On Clockjumper, PST refers to Pacific Standard Time in the United States (UTC−8). The US West Coast observes PST in winter and switches to PDT (UTC−7) during daylight saving time.

Is AST on this page the same as other zones that share the letters "AST"?

On Clockjumper, AST refers to Atlantic Standard Time in Atlantic Canada and the Caribbean (UTC−4). The same letters are also used for Arabia Standard Time (UTC+3) — check the city or UTC offset to be sure which is meant.

• AST to PST
• AEDT to PST
• AST to CST
• AEST to PST
• AST to EST
• Berlin to PST
• AST to GMT
• BST to PST
• AST to IST
• CDT to PST
• AST to MST
• CET to PST
• CST to AST
• CST to PST
• EST to AST

• About PST (Pacific Standard Time (US)) →
• About AST (Atlantic Standard Time) →
• All timezone conversion pages →
• Explore workday-overlap research →