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AST to PST: Atlantic Time to Pacific Time

4 hours behind AST

PST compared with AST, right now. Swap: PST to AST ⇄

ASTTuesday, November 3, 2026AST · UTC−4PSTTuesday, November 3, 2026PST · UTC−8

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AST to PST conversion table

For Tuesday, November 3, 2026. Rows where both places are inside 9 AM–5 PM are highlighted.

ASTPST
12:00 AM8:00 PM (previous day)
1:00 AM9:00 PM (previous day)
2:00 AM10:00 PM (previous day)
3:00 AM11:00 PM (previous day)
4:00 AM12:00 AM
5:00 AM1:00 AM
6:00 AM2:00 AM
7:00 AM3:00 AM
8:00 AM4:00 AM
9:00 AM5:00 AM
10:00 AM6:00 AM
11:00 AM7:00 AM
12:00 PM8:00 AM
1:00 PM9:00 AM
2:00 PM10:00 AM
3:00 PM11:00 AM
4:00 PM12:00 PM
5:00 PM1:00 PM
6:00 PM2:00 PM
7:00 PM3:00 PM
8:00 PM4:00 PM
9:00 PM5:00 PM
10:00 PM6:00 PM
11:00 PM7:00 PM

About these time zones

AST: Atlantic Standard Time

Atlantic Time (AST/ADT). Nova Scotia, New Brunswick and Prince Edward Island (with daylight saving), plus Puerto Rico and much of the Caribbean, which stay on AST (UTC−4) all year.

Sunday, March 14, 2027: clocks go forward 1 hour at 2:00 AM local time (UTC−4 → UTC−3).

PST: Pacific Standard Time

Pacific Time (PST/PDT). Los Angeles, San Francisco, Seattle, Portland, Las Vegas and Vancouver. PST is UTC−8; in summer the region uses PDT, UTC−7.

Sunday, March 14, 2027: clocks go forward 1 hour at 2:00 AM local time (UTC−8 → UTC−7).

Questions about AST and PST time

What is the time difference between AST and PST?

The current difference is shown at the top of this page. AST uses Atlantic Standard Time (AST, UTC−4) as standard time and Atlantic Daylight Time (ADT, UTC−3) during daylight saving time; PST uses Pacific Standard Time (PST, UTC−8) as standard time and Pacific Daylight Time (PDT, UTC−7) during daylight saving time. The difference can change if only one side observes daylight saving time or if their clocks change on different dates. Choose your meeting date in the converter to check the applicable offset.

When it is 9:00 AM in AST, what time is it in PST?

On Tuesday, November 3, 2026, 9:00 AM in AST was 5:00 AM in PST. The conversion table above shows today’s values.

Do the clocks change in AST or PST?

AST: Sunday, March 14, 2027: clocks go forward 1 hour at 2:00 AM local time (UTC−4 → UTC−3). PST: Sunday, March 14, 2027: clocks go forward 1 hour at 2:00 AM local time (UTC−8 → UTC−7).

Is AST the same as ADT?

AST is the standard-time name and ADT the daylight-saving name for Atlantic Time. People often say AST all year; this converter uses the time actually in effect on the date you choose.

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