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IST to JST: convert India Standard Time to Japan Standard Time

JST is 3:30 hours ahead of IST all year.

Neither clock changes for daylight saving, so the gap never moves.

IST also abbreviates Israel Standard Time (UTC+2) and Irish Standard Time (UTC+1). These pages use the Indian meaning.

One instant, two local clocks

Drag one day across both zones

Shared instant12:00 UTC
Difference nowJST is 3:30 hours ahead
ISTIndia Standard Time
17:30Thu, Jan 15
JSTJapan Standard Time
21:00Thu, Jan 15
Approximate daylight 09:00 to 17:00 Selected local time

Both lanes show the same instant. Local dates, daylight, and offsets come from each IANA zone on the selected date, so daylight saving changes are included.

Right now

IST: India Standard Time

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JST: Japan Standard Time

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Local times come from your browser's IANA time zone data.

IST to JST hour by hour

ISTJST
12:00 AM3:30 AM
1:00 AM4:30 AM
2:00 AM5:30 AM
3:00 AM6:30 AM
4:00 AM7:30 AM
5:00 AM8:30 AM
6:00 AM9:30 AM
7:00 AM10:30 AM
8:00 AM11:30 AM
9:00 AM12:30 PM
10:00 AM1:30 PM
11:00 AM2:30 PM
12:00 PM3:30 PM
1:00 PM4:30 PM
2:00 PM5:30 PM
3:00 PM6:30 PM
4:00 PM7:30 PM
5:00 PM8:30 PM
6:00 PM9:30 PM
7:00 PM10:30 PM
8:00 PM11:30 PM
9:00 PM12:30 AM (next day)
10:00 PM1:30 AM (next day)
11:00 PM2:30 AM (next day)

Scheduling a call between IST and JST

Standard business hours (9:00 AM to 5:00 PM) overlap from 9:00 AM to 1:30 PM in IST, which is 12:30 PM to 5:00 PM in JST.

JST to IST (reverse)Open the full converter

More IST conversions

Offsets are computed from the IANA time zone database for January 15 and July 15 of the current year. IST here means India Standard Time (India); JST means Japan Standard Time (Japan).