JST to Tehran Time Converter
IRST is 5 hours 30 minutes behind JST. 9:00 AM JST = 3:30 AM IRST.
IRST is 5 hours 30 minutes behind JST. To convert JST to Tehran Time, subtract 5 hours 30 minutes from the JST time: 9:00 AM JST = 3:30 AM IRST.
JST (Japan Time) is used in Japan. Tehran Time (Tehran time) is used in Tehran, Iran.
JST to Tehran Time time conversion table
JST to Tehran Time on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| JST | Tehran Time | Day |
|---|---|---|
| 12:00 AM JST | 6:30 PM IRST | previous day |
| 1:00 AM JST | 7:30 PM IRST | previous day |
| 2:00 AM JST | 8:30 PM IRST | previous day |
| 3:00 AM JST | 9:30 PM IRST | previous day |
| 4:00 AM JST | 10:30 PM IRST | previous day |
| 5:00 AM JST | 11:30 PM IRST | previous day |
| 6:00 AM JST | 12:30 AM IRST | night |
| 7:00 AM JST | 1:30 AM IRST | night |
| 8:00 AM JST | 2:30 AM IRST | night |
| 9:00 AM JST | 3:30 AM IRST | night |
| 10:00 AM JST | 4:30 AM IRST | night |
| 11:00 AM JST | 5:30 AM IRST | night |
| 12:00 PM JST | 6:30 AM IRST | — |
| 1:00 PM JST | 7:30 AM IRST | — |
| 2:00 PM JST | 8:30 AM IRST | — |
| 3:00 PM JST | 9:30 AM IRST | work hours |
| 4:00 PM JST | 10:30 AM IRST | work hours |
| 5:00 PM JST | 11:30 AM IRST | — |
| 6:00 PM JST | 12:30 PM IRST | — |
| 7:00 PM JST | 1:30 PM IRST | — |
| 8:00 PM JST | 2:30 PM IRST | — |
| 9:00 PM JST | 3:30 PM IRST | — |
| 10:00 PM JST | 4:30 PM IRST | — |
| 11:00 PM JST | 5:30 PM IRST | — |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert JST to Tehran Time
Subtract 5 hours 30 minutes from the JST time to get Tehran Time.
Example: 9:00 AM JST = 3:30 AM IRST.
Across midnight: 1:00 AM JST = 7:30 PM IRST (previous day). The date changes, so always check the day as well as the hour.
Time difference between JST and Tehran Time
The time difference between JST and Tehran Time is 5 hours 30 minutes all year – IRST is behind JST.
JST and Tehran Time during daylight saving time
- JST does not observe daylight saving time; it stays on UTC+9 all year.
- Tehran Time does not observe daylight saving time; it stays on UTC+3:30 all year.
Best time for a meeting between JST and Tehran Time
JST and Tehran Time share 2 hours 30 minutes of the 9 AM–5 PM working day. Any time between 2:30 PM and 5:00 PM JST lands between 9:00 AM and 11:30 AM IRST, inside working hours for both.
JST to Tehran Time FAQ
What is the time difference between JST and Tehran Time?
IRST is 5 hours 30 minutes behind JST all year. 9:00 AM JST = 3:30 AM IRST.
What is 9 AM JST in Tehran Time?
9:00 AM JST is 3:30 AM IRST.
What is 12 PM (noon) JST in Tehran Time?
12:00 PM JST is 6:30 AM IRST.
Is Tehran Time ahead of or behind JST?
IRST is 5 hours 30 minutes behind JST, so it is earlier in Tehran Time than in JST.
Does JST change for daylight saving time?
No. JST stays on the same offset all year, so conversions never shift for daylight saving time.
Does Tehran Time change for daylight saving time?
No. Tehran Time stays on the same offset all year, so conversions never shift for daylight saving time.
What is the best time for a meeting between JST and Tehran Time?
JST and Tehran Time share 2 hours 30 minutes of the 9 AM–5 PM working day. Any time between 2:30 PM and 5:00 PM JST lands between 9:00 AM and 11:30 AM IRST, inside working hours for both.
Related conversions
Convert Tehran Time to JST
Convert JST to other time zones
Convert other time zones to Tehran Time
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.