IST to JST Time Converter
Compare IST and JST instantly. The clocks below stay in sync with the IANA time-zone database, so daylight-saving transitions are handled automatically for both India and Tokyo.
24-Hour Comparison Timeline
Green = working hours · Yellow = early/late · Red = night
24-hour reference table
| IST (India) | JST (Tokyo) |
|---|---|
| 12:00 AM | 03:30 AM |
| 01:00 AM | 04:30 AM |
| 02:00 AM | 05:30 AM |
| 03:00 AM | 06:30 AM |
| 04:00 AM | 07:30 AM |
| 05:00 AM | 08:30 AM |
| 06:00 AM | 09:30 AM |
| 07:00 AM | 10:30 AM |
| 08:00 AM | 11:30 AM |
| 09:00 AM | 12:30 PM |
| 10:00 AM | 01:30 PM |
| 11:00 AM | 02:30 PM |
| 12:00 PM | 03:30 PM |
| 01:00 PM | 04:30 PM |
| 02:00 PM | 05:30 PM |
| 03:00 PM | 06:30 PM |
| 04:00 PM | 07:30 PM |
| 05:00 PM | 08:30 PM |
| 06:00 PM | 09:30 PM |
| 07:00 PM | 10:30 PM |
| 08:00 PM | 11:30 PM |
| 09:00 PM | 12:30 AM(Sun, Jul 26) |
| 10:00 PM | 01:30 AM(Sun, Jul 26) |
| 11:00 PM | 02:30 AM(Sun, Jul 26) |
Daylight saving time
Neither India nor Tokyo observes daylight saving time — the offset between IST and JST is fixed year-round.
Working-hours overlap
9 AM–2 PM IST (12 PM–5 PM JST) — the shared 9-to-5 window for meetings.
Frequently asked questions
What is the time difference between IST and JST?+
JST (UTC+09:00) is currently 3 hours 30 minutes ahead of IST (UTC+05:30). This page recalculates the offset live from the IANA time-zone database, including any daylight-saving transitions.
Does IST or JST observe daylight saving time?+
Neither India nor Tokyo observes daylight saving time, so the offset stays fixed all year. Times on this page always reflect the current local rules.
What are the best meeting hours between India and Tokyo?+
Standard 9–5 working hours in India and Tokyo overlap from 9 AM to 2 PM IST (12 PM–5 PM JST). Schedule calls inside this window to keep both sides in normal business hours.
How do I quickly convert IST to JST?+
Use the live clocks and 24-hour reference table above. Pick any hour on the IST row to see the matching JST time. The Event Planner also lets you pick a specific date and share it with attendees.