Time in Tehran vs London
Tehran keeps UTC+3:30 (UTC+3:30) and London keeps BST (UTC+1) today. London is 2½ hours behind Tehran; the rows below read both clocks live.
The working day, side by side
Hours shaded in both rows are inside working hours in both cities: 09:00–16:00 in London (11:00–18:00 your time).
| City | 00:00 in Tehran | 01:00 in Tehran | 02:00 in Tehran | 03:00 in Tehran | 04:00 in Tehran | 05:00 in Tehran | 06:00 in Tehran | 07:00 in Tehran | 08:00 in Tehran | 09:00 in Tehran | 10:00 in Tehran | 11:00 in Tehran | 12:00 in Tehran | 13:00 in Tehran | 14:00 in Tehran | 15:00 in Tehran | 16:00 in Tehran | 17:00 in Tehran | 18:00 in Tehran | 19:00 in Tehran | 20:00 in Tehran | 21:00 in Tehran | 22:00 in Tehran | 23:00 in Tehran |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tehran—— | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
| London—— | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
- Working hours
- Shoulder
- Night
- Overlap
Do more with Tehran and London
Best hours to call
Where daylight saving pulls them apart
London next changes on Sunday 25 October 2026. Between those two dates the gap between the cities is an hour different from the one shown above — which is exactly when a recurring meeting drifts. Every date we track is on the daylight saving page.
Also useful
Common questions
How many hours ahead is London of Tehran?
London is 2½ hours behind Tehran right now. The gap is not fixed: it moves whenever either side changes its clocks.
What is the best time to call between Tehran and London?
Any hour in 11:00–18:00 Tehran time is inside working hours in both cities.
Do Tehran and London change clocks on the same date?
Only one of them does, so the gap between them changes twice a year even though neither city moved relative to the sun.