HST to IST Time Converter

Convert Hawaii Standard Time (HST) to India Standard Time (IST). Both time zones are shown live below; current offset between them is 15h 30m ahead.

Honolulu · Hawaii Standard Time
22:08:04
Tuesday, May 12, 2026
HST · UTC-10:00
Mumbai · India Standard Time
13:38:04
Wednesday, May 13, 2026
GMT+5:30 · UTC+05:30

Convert a specific time

From: HST (Honolulu)
To: IST (Mumbai)
--:--

Daylight Saving status right now

HST (Hawaii Standard Time)
Observes DST
No
IST (India Standard Time)
Observes DST
No

When can HST and IST meet?

00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
HST
IST
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in Honolulu (HST). Each row shows the local working-hours state in that zone for the same moment in time.
No overlap during strict 9-5 working hours; some flexibility needed.
If both sides are willing to extend to 8am-7pm, the available window is 17:00–18:00 HST (08:30–09:30 IST).

Hour-by-hour HST to IST conversion table

HST time (Honolulu)IST time (Mumbai)Status
00:00 Tue15:30 TueIST working
01:00 Tue16:30 TueIST working
02:00 Tue17:30 TueOff-hours both sides
03:00 Tue18:30 TueOff-hours both sides
04:00 Tue19:30 TueOff-hours both sides
05:00 Tue20:30 TueOff-hours both sides
06:00 Tue21:30 TueOff-hours both sides
07:00 Tue22:30 TueOff-hours both sides
08:00 Tue23:30 TueOff-hours both sides
09:00 Tue00:30 WedHST working
10:00 Tue01:30 WedHST working
11:00 Tue02:30 WedHST working
12:00 Tue03:30 WedHST working
13:00 Tue04:30 WedHST working
14:00 Tue05:30 WedHST working
15:00 Tue06:30 WedHST working
16:00 Tue07:30 WedHST working
17:00 Tue08:30 WedOff-hours both sides
18:00 Tue09:30 WedIST working
19:00 Tue10:30 WedIST working
20:00 Tue11:30 WedIST working
21:00 Tue12:30 WedIST working
22:00 Tue13:30 WedIST working
23:00 Tue14:30 WedIST working

Times computed for today in each zone using the IANA time zone database. The conversion accounts for daylight saving time wherever applicable.

About these time zones

Hawaii Standard Time (HST)
IANA identifier
Pacific/Honolulu
Current UTC offset
UTC-10:00
Current abbreviation
HST
Major cities in this zone
Honolulu
India Standard Time (IST)
IANA identifier
Asia/Kolkata
Current UTC offset
UTC+05:30
Current abbreviation
GMT+5:30
Major cities in this zone
MumbaiNew DelhiBangaloreChennaiKolkata

Sun today in Honolulu and Mumbai

Honolulu
Sunrise
05:55
Sunset
19:02
Solar noon
12:29
Daylight
13h 6m
Mumbai
Sunrise
06:06
Sunset
19:06
Solar noon
12:36
Daylight
13h 0m

Related converters

IST to HST (reverse)HST to ESTHST to PSTHST to GMTHST to UTCHST to CETEST to ISTPST to ISTGMT to ISTUTC to ISTCET to IST
Looking for local time? See time in Honolulu or time in Mumbai.

Frequently asked questions

What is the time difference between HST and IST right now?+
IST (India Standard Time) is currently 15h 30m ahead HST (Hawaii Standard Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does HST or IST observe daylight saving time?+
HST: does not observe daylight saving time. IST: does not observe daylight saving time.
When is the best time to schedule a meeting between HST and IST?+
Standard 9-5 hours do not overlap. Extending to 8am-7pm gives a window of 17:00–18:00 HST (08:30–09:30 IST).
What time is it in Mumbai when it is 12:00 noon in Honolulu?+
When it is 12:00 Tue in Honolulu (HST), it is 03:30 Wed in Mumbai (IST).
Which IANA time zone identifiers are used for HST and IST?+
HST maps to "Pacific/Honolulu" in the IANA database. IST maps to "Asia/Kolkata". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is Honolulu ahead of or behind Mumbai?+
Whether Honolulu (HST) is ahead of or behind Mumbai (IST) depends on the current UTC offsets. Right now IST is 15h 30m ahead HST. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for HST and IST?+
HST is UTC-10:00 (HST) and IST is UTC+05:30 (GMT+5:30). Both offsets shift by one hour when the corresponding region enters or exits daylight saving time, so the live values on this page are the source of truth.
Can I schedule meetings during business hours for both HST and IST?+
Not during a strict 9am-5pm window. If both sides flex to 8am-7pm, the available meeting window between HST and IST is 17:00–18:00 HST.