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AST to HST: Atlantic Time to Hawaii-Aleutian Standard Time

6 hours behind AST

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

ASTTuesday, November 3, 2026AST · UTC−4HSTTuesday, November 3, 2026HST · UTC−10

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AST to HST conversion table

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

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

HST: Hawaii-Aleutian Standard Time

Hawaii-Aleutian Standard Time (HST). Hawaii, which stays on UTC−10 all year and does not observe daylight saving time.

No clock change is scheduled; the offset stays the same all year.

Questions about AST and HST time

What is the time difference between AST and HST?

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; HST uses Hawaii-Aleutian Standard Time (HST, UTC−10) all year. 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 HST?

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

Do the clocks change in AST or HST?

AST: Sunday, March 14, 2027: clocks go forward 1 hour at 2:00 AM local time (UTC−4 → UTC−3). HST does not change its clocks.

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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