AST PSTTime Converter
AST (UTC−4) is currently 4 hours ahead of PST (UTC−8). Compare live clocks, convert any hour, and find times to meet.
Best time to meet between AST and PST
Best meeting times:
AST: 1:00 PM – 6:00 PM
PST: 9:00 AM – 2:00 PM
Quick answer
When it's in AST, it's the same day in PST.
AST runs 4 hours ahead of PST. Both sides keep standard office hours with a real 9–6 overlap: the highlighted window above works for everyone.
- Time difference
- −4h 00m
- AST
- UTC−4
- PST
- UTC−8
- Best call window
- 1:00 PM AST
AST to PST conversion table
The next 12 hours in AST and the matching local time in PST. The current hour is highlighted; drag the converter's slider and the table follows.
| AST | PST |
|---|---|
| NOW Thu, Aug 6 |
Thu, Aug 6 |
Thu, Aug 6 |
Thu, Aug 6 |
Thu, Aug 6 |
Thu, Aug 6 |
Thu, Aug 6 |
Thu, Aug 6 |
Thu, Aug 6 |
Thu, Aug 6 |
Fri, Aug 7 |
Thu, Aug 6 |
Fri, Aug 7 |
Thu, Aug 6 |
Fri, Aug 7 |
Thu, Aug 6 |
Fri, Aug 7 |
Thu, Aug 6 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
Fri, Aug 7 |
This time difference never changes
Neither side observes daylight saving against the other, so the gap stays constant all year. Regions on AST switch to ADT (UTC−3) during daylight saving time. Regions on PST switch to PDT (UTC−7) during daylight saving time. This page always shows the live, DST-aware difference.
Related time zone conversions
Jump straight to another pair: every combination is a live tool, not an article.
From AST
To PST
One source of truth, for you and your AI
This page exposes the same answer as structured data, so when you ask an assistant "what's 9am AST time in PST?", it can cite the exact, DST-aware result, not a stale blog post.
- Schema.org JSON-LD on every converter page
- A machine-readable facts island with time zone identifiers and every possible offset
- Live times in <time datetime> elements with explicit UTC offsets
{
"pair": "AST → PST",
"url": "https://worldclock.pro/en/convert/ast-to-pst",
"from": {
"name": "AST",
"type": "timezone",
"abbreviation": "AST",
"daylightAbbreviation": "ADT",
"iana": "America/Halifax",
"standardUtcOffset": "-04:00",
"daylightUtcOffset": "-03:00",
"referenceCity": "Halifax"
},
"to": {
"name": "PST",
"type": "timezone",
"abbreviation": "PST",
"daylightAbbreviation": "PDT",
"iana": "America/Los_Angeles",
"standardUtcOffset": "-08:00",
"daylightUtcOffset": "-07:00",
"referenceCity": "Los Angeles"
},
"currentDifferenceMinutes": -240,
"possibleDifferencesMinutes": [
-240
],
"note": "The difference is constant year-round."
}
Frequently asked questions
What is the time difference between AST and PST?
AST is currently 4 hours ahead of PST. AST is on AST (UTC−4) and PST is on PST (UTC−8). The difference can change when either side starts or ends daylight saving time.
Is PST ahead of or behind AST?
PST is currently 4 hours behind AST.
When it is 9:00 AM in AST, what time is it in PST?
When it is 9:00 AM on a Thursday in AST, it is 5:00 AM in PST.
Do AST and PST observe daylight saving time?
Regions on AST switch to ADT (UTC−3) during daylight saving time. Regions on PST switch to PDT (UTC−7) during daylight saving time.
How do I convert AST time to PST time?
Subtract 4 hours from any time in AST to get the time in PST. This page's converter and 24-hour table do it automatically and stay correct through daylight-saving changes.
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