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Time difference: Japan and Tehran
Last updated:
Difference now−5 h 30 minTehran is 5 h 30 min behind Japan
Time in Tehran17:40UTC+3:30
Time in Japan23:10UTC+9
Changes per year0same all year
Weekday 9–18 overlap3 h
Difference by month (2026, 1st of each month)
| Month | Difference |
|---|---|
| Jan | −5 h 30 min |
| Feb | −5 h 30 min |
| Mar | −5 h 30 min |
| Apr | −5 h 30 min |
| May | −5 h 30 min |
| Jun | −5 h 30 min |
| Jul | −5 h 30 min |
| Aug | −5 h 30 min |
| Sep | −5 h 30 min |
| Oct | −5 h 30 min |
| Nov | −5 h 30 min |
| Dec | −5 h 30 min |
Days in 2026 at each difference
365 d
Japan → Tehran conversion (today)
| Japan | Tehran |
|---|---|
| 00:00 | 18:30 (-1 d) |
| 01:00 | 19:30 (-1 d) |
| 02:00 | 20:30 (-1 d) |
| 03:00 | 21:30 (-1 d) |
| 04:00 | 22:30 (-1 d) |
| 05:00 | 23:30 (-1 d) |
| 06:00 | 00:30 |
| 07:00 | 01:30 |
| 08:00 | 02:30 |
| 09:00 | 03:30 |
| 10:00 | 04:30 |
| 11:00 | 05:30 |
| 12:00 | 06:30 |
| 13:00 | 07:30 |
| 14:00 | 08:30 |
| 15:00 | 09:30 |
| 16:00 | 10:30 |
| 17:00 | 11:30 |
| 18:00 | 12:30 |
| 19:00 | 13:30 |
| 20:00 | 14:30 |
| 21:00 | 15:30 |
| 22:00 | 16:30 |
| 23:00 | 17:30 |
Overlapping office hours today (09–18 local)
15:00 Japan = 09:30 Tehran, 16:00 Japan = 10:30 Tehran, 17:00 Japan = 11:30 Tehran
Clock changes 2026–2027
Neither place changes its clocks in 2026–2027.
Calculated from the IANA Time Zone Database; governments can change their rules.
About this page
Tehran is 5 h 30 min behind Japan.