Question 1

What is the time difference between IST and HST?

Accepted Answer

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

Question 2

How do I convert IST to HST?

Accepted Answer

To convert IST to HST, subtract 15 hours and 30 minutes from the IST time. For example, 9:00 AM IST is 5:30 PM HST.

Question 3

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

Accepted Answer

When it's 12:00 PM (noon) in IST, it's 8:30 PM in HST. HST is 15 hours and 30 minutes behind IST.

Question 4

How many hours behind is HST from IST?

Accepted Answer

HST is 15 hours and 30 minutes behind IST. This means when it's 9:00 AM in IST, it's 5:30 PM in HST.

Question 5

Is HST ahead or behind IST?

Accepted Answer

HST is behind IST by 15 hours and 30 minutes. Clocks in HST show an earlier time than IST.

Question 6

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 7

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 8

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

Accepted Answer

The best time for a call between IST and HST 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 IST and HST ever have the same time?

Accepted Answer

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

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

IST to HST Converter

Timezone Details

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IST to HST Conversion Table

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