Japan Standard Time (JST)
Japan Standard Time is UTC+9 all year. Japan does not observe daylight saving time.
- IANA zone
- Asia/Tokyo
- Offset
- UTC+9 all year
- Used in
- Japan
- Major cities
- Tokyo, Osaka, Yokohama, Nagoya, Sapporo
JST to IST converter
Convert Japan Standard Time (JST) to India Standard Time (IST), with daylight saving applied for the exact date you pick.
From
Tue, Oct 27
To
Tue, Oct 27 Same day
| Su | Mo | Tu | We | Th | Fr | Sa |
|---|
JST 9 to 5 IST 9 to 5
- From zone
- Japan Standard Time
- Offset and clock
- UTC+9 No daylight saving time
- IANA name
- Asia/Tokyo
- To zone
- India Standard Time
- Offset and clock
- UTC+5:30 No daylight saving time
- IANA name
- Asia/Kolkata
IST is 3 hours 30 minutes behind JST.
- Time difference
- India Standard Time is 3 hours 30 minutes behind Japan Standard Time all year.
- Meeting window
- Working days of 9 AM to 5 PM overlap from 12:30 PM to 5:00 PM JST, which is 9:00 AM to 1:30 PM IST.
- Daylight saving
- Neither zone observes daylight saving time, so the difference never changes.
Where JST and IST apply
Shaded areas follow the official zone boundaries, so a country split across zones is split here too. Hover or tap a region for its local time.
- Japan Standard Time
- India Standard Time
- Same UTC offset right now, different zone rules
Hour by hour
Every hour of Tuesday, October 27, 2026, side by side. Days with a clock change show 23 or 25 rows.
Shaded rows fall inside working hours in both places.
| Tokyo (JST) | New Delhi (IST) | Working hours |
|---|---|---|
| 12:00 AM | 8:30 PM previous day | |
| 1:00 AM | 9:30 PM previous day | |
| 2:00 AM | 10:30 PM previous day | |
| 3:00 AM | 11:30 PM previous 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 | |
| 12:00 PM | 8:30 AM | |
| 1:00 PM | 9:30 AM | Both working |
| 2:00 PM | 10:30 AM | Both working |
| 3:00 PM | 11:30 AM | Both working |
| 4:00 PM | 12:30 PM | Both working |
| 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 |
JST to IST conversion table
Common JST times and their IST equivalents.
| Japan Standard Time | IST 3 h 30 min behind, all year |
|---|---|
| 12:00 AM | 8:30 PM (previous day) |
| 6:00 AM | 2:30 AM |
| 8:00 AM | 4:30 AM |
| 9:00 AM | 5:30 AM |
| 10:00 AM | 6:30 AM |
| 12:00 PM | 8:30 AM |
| 2:00 PM | 10:30 AM |
| 3:00 PM | 11:30 AM |
| 5:00 PM | 1:30 PM |
| 6:00 PM | 2:30 PM |
| 8:00 PM | 4:30 PM |
| 10:00 PM | 6:30 PM |
Upcoming clock changes
Neither Japan Standard Time nor India Standard Time changes its clocks in the next 18 months.
About the two zones
India Standard Time (IST)
India Standard Time is UTC+5:30 all year. The whole country keeps a single clock, and India has not observed daylight saving time since the 1940s, so IST never changes.
- IANA zone
- Asia/Kolkata
- Offset
- UTC+5:30 all year
- Used in
- India
- Major cities
- Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Kolkata
IST can also stand for Irish Standard Time or Israel Standard Time. On this site IST always means India Standard Time (Asia/Kolkata).
JST and IST, answered
What is the time difference between JST and IST?
India Standard Time is 3 hours 30 minutes behind Japan Standard Time all year.
What is a good meeting time for JST and IST?
Working days of 9 AM to 5 PM overlap from 12:30 PM to 5:00 PM JST, which is 9:00 AM to 1:30 PM IST.
Does daylight saving time affect JST to IST?
Neither zone observes daylight saving time, so the difference never changes.
Which IST does the JST to IST converter use?
IST can also stand for Irish Standard Time or Israel Standard Time. On this site IST always means India Standard Time (Asia/Kolkata).