What is IST in HST?
Hawaii Standard Time is 15 hours 30 minutes behind
India Standard Time is on UTC+5:30 and Hawaii Standard Time is on UTC−10:00 right now. That gap holds all year, because both zones change their clocks together.
- Time in New Delhi
- 7:44 am
- Time in Honolulu
- 4:14 pm
- Difference
- −15:30 h
- Next clock change
- Neither zone
Convert a time
HST — Hawaii Standard Time
3:30 pm
Tue, the previous day
Daylight saving
India Standard Time
India Standard Time stays on IST all year, so its offset from UTC never moves.
Hawaii Standard Time
Hawaii Standard Time stays on HST all year, so its offset from UTC never moves.
IST to HST conversion table
Every hour of Wednesday, September 23, 2026, converted from India Standard Time to Hawaii Standard Time. 16 of the 24 hours fall on a different calendar day in Honolulu, which is marked.
- 12:00 am IST
- 8:30 am HST−1 day
- 1:00 am IST
- 9:30 am HST−1 day
- 2:00 am IST
- 10:30 am HST−1 day
- 3:00 am IST
- 11:30 am HST−1 day
- 4:00 am IST
- 12:30 pm HST−1 day
- 5:00 am IST
- 1:30 pm HST−1 day
- 6:00 am IST
- 2:30 pm HST−1 day
- 7:00 am IST
- 3:30 pm HST−1 day
- 8:00 am IST
- 4:30 pm HST−1 day
- 9:00 am IST
- 5:30 pm HST−1 day
- 10:00 am IST
- 6:30 pm HST−1 day
- 11:00 am IST
- 7:30 pm HST−1 day
- 12:00 pm IST
- 8:30 pm HST−1 day
- 1:00 pm IST
- 9:30 pm HST−1 day
- 2:00 pm IST
- 10:30 pm HST−1 day
- 3:00 pm IST
- 11:30 pm HST−1 day
- 4:00 pm IST
- 12:30 am HST
- 5:00 pm IST
- 1:30 am HST
- 6:00 pm IST
- 2:30 am HST
- 7:00 pm IST
- 3:30 am HST
- 8:00 pm IST
- 4:30 am HST
- 9:00 pm IST
- 5:30 am HST
- 10:00 pm IST
- 6:30 am HST
- 11:00 pm IST
- 7:30 am HST
Scheduling between the two
Working hours overlap from 9:00 am to 10:00 am IST, which is 5:30 pm to 6:30 pm HST. Anything inside that window falls in the normal working day at both ends.
A note on IST: it can also mean Israel Standard Time (UTC+2) and Irish Standard Time (UTC+1). This page means India Standard Time, which is what almost all searches for IST want.
India Standard Time (IST) is used in all of India and Sri Lanka, on a single UTC+5:30 offset with no daylight saving
Hawaii Standard Time (HST) is used in all of Hawaii, which does not observe daylight saving