Question 1

What is the time difference between HST and IST?

Accepted Answer

India Standard Time (IST) is 15 hours and 30 minutes ahead of Hawaii Standard Time (HST). Use the conversion table above to see the exact time for each hour.

Question 2

How do I convert HST to IST?

Accepted Answer

To convert HST to IST, add 15 hours and 30 minutes to the HST time. For example, 9:00 AM HST is 12:30 AM IST.

Question 3

What time is it in IST when it's noon in HST?

Accepted Answer

When it's 12:00 PM (noon) in HST, it's 3:30 AM in IST. IST is 15 hours and 30 minutes ahead of HST.

Question 4

How many hours ahead is IST from HST?

Accepted Answer

IST is 15 hours and 30 minutes ahead of HST. This means when it's 9:00 AM in HST, it's 12:30 AM in IST.

Question 5

Is IST ahead or behind HST?

Accepted Answer

IST is ahead of HST by 15 hours and 30 minutes. Clocks in IST show a later time than HST.

Question 6

Does HST observe daylight saving time?

Accepted Answer

No, Hawaii Standard Time does not observe daylight saving time. The UTC offset remains the same year-round.

Question 7

Does IST observe daylight saving time?

Accepted Answer

No, India Standard Time does not observe daylight saving time. The UTC offset remains the same year-round.

Question 8

What is the best time to call from HST to IST?

Accepted Answer

The best time for a call between HST and IST is during overlapping business hours (9 AM – 5 PM) in both timezones. Check the color-coded conversion table above — green hours indicate business hours in both zones.

Question 9

Do HST and IST ever have the same time?

Accepted Answer

No, HST and IST are always 15 hours and 30 minutes apart. Neither timezone observes DST, so the difference is constant year-round.

Hawaii Standard Time (HST)	Period	India Standard Time (IST)	Period
12:00 AM	Night	3:30 PM	Business
1:00 AM	Night	4:30 PM	Business
2:00 AM	Night	5:30 PM	Business
3:00 AM	Night	6:30 PM	Evening
4:00 AM	Night	7:30 PM	Evening
5:00 AM	Night	8:30 PM	Evening
6:00 AM	Morning	9:30 PM	Evening
7:00 AM	Morning	10:30 PM	Evening
8:00 AM	Morning	11:30 PM	Evening
9:00 AM	Business	12:30 AM+1d	Night
10:00 AM	Business	1:30 AM+1d	Night
11:00 AM	Business	2:30 AM+1d	Night
12:00 PM	Business	3:30 AM+1d	Night
1:00 PM	Business	4:30 AM+1d	Night
2:00 PM	Business	5:30 AM+1d	Night
3:00 PM	Business	6:30 AM+1d	Morning
4:00 PM	Business	7:30 AM+1d	Morning
5:00 PM	Business	8:30 AM+1d	Morning
6:00 PM	Evening	9:30 AM+1d	Business
7:00 PM	Evening	10:30 AM+1d	Business
8:00 PM	Evening	11:30 AM+1d	Business
9:00 PM	Evening	12:30 PM+1d	Business
10:00 PM	Evening	1:30 PM+1d	Business
11:00 PM	Evening	2:30 PM+1d	Business

HST to IST Converter

Timezone Details

24-Hour Overview

HST to IST Conversion Table

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