Time zone converter

HST to IST

India Standard Time (IST) is 15 hours 30 minutes ahead of Hawaii Time (HST) all year: 9:00 AM HST is 12:30 AM IST the next day.

Hawaii Time
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Current time in Hawaii Time
India Standard Time
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Current time in India Standard Time
Pick a date and time to convert.

IST vs HST over the next 12 months

PeriodIST isExample
Oct 23, 2026 onwards15 hours 30 minutes ahead9:00 AM HST = 12:30 AM IST (next day)

HST to IST conversion table

Every hour of a weekday around Oct 23, 2026, in both zones.

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

Best time for a meeting

There is no 9-to-5 overlap; within an 8 AM–8 PM day the zones overlap for 3 hours 30 minutes on a weekday: 4:30 PM–8:00 PM HST, which is 8:00 AM–11:30 AM IST.

Comparing more than two places? The meeting planner lines up working hours for up to six cities.

Daylight saving time

Neither HST nor IST changes its clocks, so the difference is the same all year.

Where these clocks are used

  • Hawaii Time (HST): Hawaii, which does not observe daylight saving time. IANA zone Pacific/Honolulu.
  • India Standard Time (IST): all of India: Mumbai, Delhi, Bengaluru, Chennai. IANA zone Asia/Kolkata.

Questions

What time is it in IST when it is 9 AM HST?

On Oct 23, 2026, 9:00 AM HST is 12:30 AM IST the next day.

How many hours ahead of HST is IST?

IST is always 15 hours 30 minutes ahead of HST.

Do HST and IST observe daylight saving time?

Hawaii Time stays on UTC−10 all year. India Standard Time stays on UTC+5:30 all year.

What is the best time for a meeting between HST and IST?

There is no 9-to-5 overlap; within an 8 AM–8 PM day the zones overlap for 3 hours 30 minutes on a weekday: 4:30 PM–8:00 PM HST, which is 8:00 AM–11:30 AM IST.

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Related conversions

Computed from the IANA time zone database on Oct 23, 2026. Live clocks and the converter use your browser's copy of the same data.