India Standard Time
IST means UTC+05:30 throughout the year.
Other meanings: Israel Standard Time · Irish Standard Time.
TIME ZONE CONVERTER
IST to JST
Time Converter
Convert India Standard Time to Japan Standard Time. Compare dates, seasonal differences and meeting hours.
IST is 3h 30m behind JST in 2026.
9 AM IST = 12:30 PM JST
Selected date: November 4, 2026. Fixed abbreviations retain their stated UTC offsets.
THE QUICK REFERENCE
CSVIST to JST conversion table
November 4, 2026 · Date changes are marked.
View the full 24-hour table
| IST | JST |
|---|---|
| 12:00 AM | 3:30 AM |
| 1:00 AM | 4:30 AM |
| 2:00 AM | 5:30 AM |
| 3:00 AM | 6:30 AM |
| 4:00 AM | 7:30 AM |
| 5:00 AM | 8:30 AM |
| 6:00 AM | 9:30 AM |
| 7:00 AM | 10:30 AM |
| 8:00 AM | 11:30 AM |
| 9:00 AM | 12:30 PM |
| 10:00 AM | 1:30 PM |
| 11:00 AM | 2:30 PM |
| IST | JST |
|---|---|
| 12:00 PM | 3:30 PM |
| 1:00 PM | 4:30 PM |
| 2:00 PM | 5:30 PM |
| 3:00 PM | 6:30 PM |
| 4:00 PM | 7:30 PM |
| 5:00 PM | 8:30 PM |
| 6:00 PM | 9:30 PM |
| 7:00 PM | 10:30 PM |
| 8:00 PM | 11:30 PM |
| 9:00 PM | 12:30 AM +1 day |
| 10:00 PM | 1:30 AM +1 day |
| 11:00 PM | 2:30 AM +1 day |
Starting with the JST working day
These examples start on 2026-11-04 in JST.
09:00 JST05:30 →IST · 2026-11-04
17:00 JST13:30 →IST · 2026-11-04
Which time-zone meaning are we using?
Japan Standard Time
JST means UTC+09:00 throughout the year.
ONE CLOCK TIME. THE WHOLE YEAR.
Year CSV09:00 IST to JST throughout 2026
09:00 in IST converts to 12:30 in JST on every date in 2026. The destination has the same calendar date.
Every calendar date is included, not just workdays. Date ranges include both endpoints. Based on IANA 2026e; future rules may change.
DON’T LOSE A DAY
When does IST time become a different date in JST?
Your complete source day: 2026-11-04. Each range shows which destination date to use.
IST · 2026-11-0400:00–20:30UTC+05:30
JST · 2026-11-0403:30–24:00UTC+09:00 Same date
IST · 2026-11-0420:30–24:00UTC+05:30
JST · 2026-11-0500:00–03:30UTC+09:00 Next day
Range starts are included; ends are excluded. 24:00 means midnight at the end of that date. Repeated hours appear separately with their UTC offsets. The strip is proportional to elapsed time.
THE BIGGER PICTURE
2026Some things stay in sync.
The difference between IST and JST stays the same throughout 2026.
JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC
+3h 30m
Neither selected clock changes its UTC offset during 2026.
CLOCK CHANGES
No upcoming clock adjustment
Both selected labels are fixed offsets, so seasonal clock changes do not alter this conversion.
PLAN BEYOND A SINGLE DAY
Daily CSVIST–JST working hours through 2026
Every date calculated with your working windows. 261 selected IST workdays; public holidays are not applied.
Least shared time4h 30m
Most common4h 30m
Most shared time4h 30m
Days without a 60-min slot0 / 261
A start time that survives the whole year.
Start a 60-minute meeting in IST 09:00–12:30.
These starts fit both working windows on every selected IST workday in 2026, using a 15-minute start grid. The end of each range is the last valid start.
IST: 09:00–17:00, Mon, Tue, Wed, Thu, Fri. JST: 09:00–17:00, Mon, Tue, Wed, Thu, Fri.
Calculation details and repeated hours
Overnight shifts belong to their start weekday. Host workday means the source calendar date. Repeated local times use the first occurrence.
THE DETAILS THAT MATTER
IST to JST: useful answers
Does the IST–JST time difference change in 2026?
The difference stays constant throughout 2026: JST is 3h 30m ahead compared with IST.
Does this conversion change the calendar date?
09:00 in IST on 2026-11-04 is 12:30 in JST on 2026-11-04. This selected time stays on the same date in both places. Other times can cross midnight.
Can IST and JST meet during working hours?
Your selected working windows share 4h 30m on 2026-11-04. The planner above checks the whole meeting duration and shows suitable start times. Edit the windows to match your team.
Related time-zone meanings and conversions
Choose the question you need answered
Calculated with IANA 2026e. Working hours are your preferences; public holidays and calendar availability are not included. Our methodology