Question 1

What is the time difference between JST and IST?

Accepted Answer

India Standard Time (IST) is 3 hours and 30 minutes behind Japan Standard Time (JST). Use the conversion table above to see the exact time for each hour.

Question 2

How do I convert JST to IST?

Accepted Answer

To convert JST to IST, subtract 3 hours and 30 minutes from the JST time. For example, 9:00 AM JST is 5:30 AM IST.

Question 3

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

Accepted Answer

When it's 12:00 PM (noon) in JST, it's 8:30 AM in IST. IST is 3 hours and 30 minutes behind JST.

Question 4

How many hours behind is IST from JST?

Accepted Answer

IST is 3 hours and 30 minutes behind JST. This means when it's 9:00 AM in JST, it's 5:30 AM in IST.

Question 5

Is IST ahead or behind JST?

Accepted Answer

IST is behind JST by 3 hours and 30 minutes. Clocks in IST show an earlier time than JST.

Question 6

Does JST observe daylight saving time?

Accepted Answer

No, Japan 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 JST to IST?

Accepted Answer

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

Accepted Answer

No, JST and IST are always 3 hours and 30 minutes apart. Neither timezone observes DST, so the difference is constant year-round.

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

JST to IST Converter

Timezone Details

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JST to IST Conversion Table

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