IST to HST Time Converter

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

Mumbai · India Standard Time
08:19:00
Tuesday, May 12, 2026
GMT+5:30 · UTC+05:30
Honolulu · Hawaii Standard Time
16:49:00
Monday, May 11, 2026
HST · UTC-10:00

Convert a specific time

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

Daylight Saving status right now

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

When can IST and HST 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
IST
HST
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in Mumbai (IST). 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 08:00–10:00 IST (16:30–18:30 HST).

Hour-by-hour IST to HST conversion table

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

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

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
Hawaii Standard Time (HST)
IANA identifier
Pacific/Honolulu
Current UTC offset
UTC-10:00
Current abbreviation
HST
Major cities in this zone
Honolulu

Sun today in Mumbai and Honolulu

Mumbai
Sunrise
06:06
Sunset
19:05
Solar noon
12:36
Daylight
12h 59m
Honolulu
Sunrise
05:56
Sunset
19:01
Solar noon
12:29
Daylight
13h 5m

Related converters

HST to IST (reverse)IST to ESTIST to PSTIST to GMTIST to UTCIST to CETEST to HSTPST to HSTGMT to HSTUTC to HSTCET to HST
Looking for local time? See time in Mumbai or time in Honolulu.

Frequently asked questions

What is the time difference between IST and HST right now?+
HST (Hawaii Standard Time) is currently 15h 30m behind IST (India Standard Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does IST or HST observe daylight saving time?+
IST: does not observe daylight saving time. HST: does not observe daylight saving time.
When is the best time to schedule a meeting between IST and HST?+
Standard 9-5 hours do not overlap. Extending to 8am-7pm gives a window of 08:00–10:00 IST (16:30–18:30 HST).
What time is it in Honolulu when it is 12:00 noon in Mumbai?+
When it is 12:00 Tue in Mumbai (IST), it is 20:30 Mon in Honolulu (HST).
Which IANA time zone identifiers are used for IST and HST?+
IST maps to "Asia/Kolkata" in the IANA database. HST maps to "Pacific/Honolulu". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is Mumbai ahead of or behind Honolulu?+
Whether Mumbai (IST) is ahead of or behind Honolulu (HST) depends on the current UTC offsets. Right now HST is 15h 30m behind IST. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for IST and HST?+
IST is UTC+05:30 (GMT+5:30) and HST is UTC-10:00 (HST). 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 IST and HST?+
Not during a strict 9am-5pm window. If both sides flex to 8am-7pm, the available meeting window between IST and HST is 08:00–10:00 IST.