Honolulu MumbaiHST to IST Time Converter
Honolulu (HST, UTC−10) is currently 15 hours 30 minutes behind Mumbai (IST, UTC+5:30). Compare live clocks, convert any hour, and find times to meet.
Quick answer
When it's in Honolulu, it's the next day in Mumbai.
Honolulu (HST) runs 15 hours 30 minutes behind Mumbai (IST). A 9-to-5 workday on one side lands in the other side's evening or night, so the two cities share almost no normal working hours — edge-of-day calls are the trick.
- Time difference
- +15h 30m
- HST
- UTC−10
- IST
- UTC+5:30
- Best call window
- Outside 9–6
HST to IST conversion table
The next 12 hours in HST and the matching local time in IST. The current hour is highlighted; drag the converter's slider and the table follows.
| HST | IST |
|---|---|
| NOW Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Mon, Jun 22 |
Tue, Jun 23 |
Best time to meet between HST & IST
Working hours are 9am–6pm in each city. The bright band is where they overlap — when both sides are at their desks.
This time difference never changes
Neither side observes daylight saving against the other, so the gap stays constant all year. 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 HST
To IST
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 HST time in IST?", 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 IANA zones and every possible offset
- Live times in <time datetime> elements with explicit UTC offsets
{
"pair": "HST → IST",
"url": "https://worldclock.pro/en/convert/hst-to-ist",
"from": {
"name": "HST",
"type": "timezone",
"abbreviation": "HST",
"daylightAbbreviation": null,
"iana": "Pacific/Honolulu",
"standardUtcOffset": "-10:00",
"daylightUtcOffset": null,
"referenceCity": "Honolulu"
},
"to": {
"name": "IST",
"type": "timezone",
"abbreviation": "IST",
"daylightAbbreviation": null,
"iana": "Asia/Kolkata",
"standardUtcOffset": "+05:30",
"daylightUtcOffset": null,
"referenceCity": "Mumbai"
},
"currentDifferenceMinutes": 930,
"possibleDifferencesMinutes": [
930
],
"note": "The difference is constant year-round."
}
Frequently asked questions
What is the time difference between HST and IST?
HST is currently 15 hours 30 minutes behind IST. HST is on HST (UTC−10) and IST is on IST (UTC+5:30). The difference can change when either side starts or ends daylight saving time.
Is IST ahead of or behind HST?
IST is currently 15 hours 30 minutes ahead of HST.
When it is 9:00 AM in HST, what time is it in IST?
When it is 9:00 AM on a Monday in HST, it is 12:30 AM the next day in IST.
Do HST and IST observe daylight saving time?
HST does not observe daylight saving time. IST does not observe daylight saving time.
How do I convert HST time to IST time?
Add 15 hours 30 minutes to any time in HST to get the time in IST. This page's converter and 24-hour table do it automatically and stay correct through daylight-saving changes.
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