JST to IST
India Standard Time is 3 hours 30 minutes behind Japan Standard Time, all year round.
JST to IST conversion table
Every hour of the day, Japan Standard Time to India Standard Time. The gap never changes, so this table holds on every date.
| JST | IST |
|---|---|
| 12:00 AM | 8:30 PM −1 day |
| 1:00 AM | 9:30 PM −1 day |
| 2:00 AM | 10:30 PM −1 day |
| 3:00 AM | 11:30 PM −1 day |
| 4:00 AM | 12:30 AM |
| 5:00 AM | 1:30 AM |
| 6:00 AM | 2:30 AM |
| 7:00 AM | 3:30 AM |
| 8:00 AM | 4:30 AM |
| 9:00 AM | 5:30 AM |
| 10:00 AM | 6:30 AM |
| 11:00 AM | 7:30 AM |
| JST | IST |
|---|---|
| 12:00 PM | 8:30 AM |
| 1:00 PM | 9:30 AM |
| 2:00 PM | 10:30 AM |
| 3:00 PM | 11:30 AM |
| 4:00 PM | 12:30 PM |
| 5:00 PM | 1:30 PM |
| 6:00 PM | 2:30 PM |
| 7:00 PM | 3:30 PM |
| 8:00 PM | 4:30 PM |
| 9:00 PM | 5:30 PM |
| 10:00 PM | 6:30 PM |
| 11:00 PM | 7:30 PM |
Shared working hours
Taking a working day as 09:00–17:00 in each zone, Japan Standard Time and India Standard Time overlap for 4 hours 30 minutes.
12:30 PM–5:00 PM in JST is 9:00 AM–1:30 PM in IST.
When the difference changes
It doesn't. India Standard Time is 3 hours 30 minutes behind Japan Standard Time on every date of the year. Japan Standard Time runs at UTC+09:00; India Standard Time runs at UTC+05:30.
About Japan Standard Time
Japan is a fixed UTC+9 and has had no daylight saving since 1951. It shares its clock with Korea exactly, so a schedule that works for Tokyo works unchanged for Seoul.
Cities on this clock: Tokyo, Osaka, Seoul.
About India Standard Time
India keeps one clock, UTC+5:30, across a country spanning about 29 degrees of longitude — the sun rises nearly two hours earlier in Arunachal Pradesh than in Gujarat on the same clock. The half-hour offset means most conversions from India land on the half hour rather than the hour. Sri Lanka keeps the same time.
Cities on this clock: Mumbai, Delhi, Bangalore, Hyderabad, Chennai, Kolkata, Pune, Ahmedabad.
Watch out: IST is also Israel Standard Time (UTC+2) and Irish Standard Time (UTC+1). This page is the Indian one.
How the difference is worked out
Neither Japan Standard Time nor India Standard Time moves its clock relative to the other, so india standard time is 3 hours 30 minutes behind japan standard time is a rule rather than a fact about one particular year. The hour-by-hour table above holds on every date.
With both zones on their own standard time — daylight saving not in force anywhere — India Standard Time is 3 hours 30 minutes behind Japan Standard Time. That figure never changes; everything else on this page follows from it plus whichever clocks have moved.
Every figure here comes from the IANA time zone database via your browser's own Intl engine, using the zone ids Asia/Tokyo and Asia/Kolkata. Nothing is looked up on a server and nothing about your visit is recorded.
Is IST ahead of or behind JST?
India Standard Time is 3 hours 30 minutes behind Japan Standard Time, all year round. Japan Standard Time runs at UTC+09:00; India Standard Time runs at UTC+05:30. Because neither zone changes its clock, the gap never moves.
What time is 9 AM JST in IST?
9:00 AM JST is 5:30 AM IST.
When can Japan Standard Time and India Standard Time meet?
Taking a working day as 09:00–17:00 in each zone, the two overlap for 4 hours 30 minutes: 12:30 PM–5:00 PM in Japan Standard Time, which is 9:00 AM–1:30 PM in India Standard Time.
What does JST stand for?
JST is Japan Standard Time, also written Tokyo time, Japan time, Osaka time. Japan is a fixed UTC+9 and has had no daylight saving since 1951. It shares its clock with Korea exactly, so a schedule that works for Tokyo works unchanged for Seoul.