IST to AST: India Standard Time to Atlantic Time

9 hours 30 minutes behind IST

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

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IST to AST conversion table

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

ISTAST
12:00 AM2:30 PM (previous day)
1:00 AM3:30 PM (previous day)
2:00 AM4:30 PM (previous day)
3:00 AM5:30 PM (previous day)
4:00 AM6:30 PM (previous day)
5:00 AM7:30 PM (previous day)
6:00 AM8:30 PM (previous day)
7:00 AM9:30 PM (previous day)
8:00 AM10:30 PM (previous day)
9:00 AM11:30 PM (previous day)
10:00 AM12:30 AM
11:00 AM1:30 AM
12:00 PM2:30 AM
1:00 PM3:30 AM
2:00 PM4:30 AM
3:00 PM5:30 AM
4:00 PM6:30 AM
5:00 PM7:30 AM
6:00 PM8:30 AM
7:00 PM9:30 AM
8:00 PM10:30 AM
9:00 PM11:30 AM
10:00 PM12:30 PM
11:00 PM1:30 PM

About these time zones

IST: India Standard Time

India Standard Time (IST). All of India, including Mumbai, New Delhi, Bengaluru and Kolkata. IST is UTC+5:30 all year. IST can also mean Irish or Israel Standard Time; this page means India.

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

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).

Questions about IST and AST time

What is the time difference between IST and AST?

The current difference is shown at the top of this page. IST uses India Standard Time (IST, UTC+5:30) all year; AST uses Atlantic Standard Time (AST, UTC−4) as standard time and Atlantic Daylight Time (ADT, UTC−3) 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 IST, what time is it in AST?

On Tuesday, November 3, 2026, 9:00 AM in IST was 11:30 PM (previous day) in AST. The conversion table above shows today’s values.

Do the clocks change in IST or AST?

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

Is IST the same as IST?

India Standard Time does not use daylight saving time, so IST applies all year.

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