London time to Tehran time
Tehran is 3.5 hours ahead of London in January and 2.5 hours ahead of in July (London BST/UTC+01:00 in summer; Tehran GMT+3:30/UTC+03:30). Enter a London time below to convert it, or leave it blank to see the current time in both cities.
How to use the London to Tehran time
- Type a London time (24-hour) and optionally a date, or leave blank for now.
- Click Convert.
- Read the Tehran time and the working-hours table.
Time difference between London and Tehran
Tehran is 3.5 hours ahead of London in January and 2.5 hours ahead of in July. London observes daylight saving time and Tehran does not, so the difference changes twice a year. London uses Europe/London time (UTC+00:00 in January, UTC+01:00 in July); Tehran uses Asia/Tehran (UTC+03:30 in January, UTC+03:30 in July).
Working week in London and Tehran
London: Office hours 09:00–17:30, weekend Saturday–Sunday. Clocks go forward on the last Sunday of March (BST, UTC+1) and back on the last Sunday of October (GMT).
Tehran: Iran Standard Time, UTC+3:30 all year (daylight saving was abolished in 2022). Weekend is Friday, with Thursday a half day for many; the week starts Saturday.
Quick conversion table (summer difference)
| London | Tehran |
|---|---|
| 08:00 | 10:30 |
| 09:00 | 11:30 |
| 10:00 | 12:30 |
| 12:00 | 14:30 |
| 14:00 | 16:30 |
| 16:00 | 18:30 |
| 18:00 | 20:30 |
| 20:00 | 22:30 |
| 22:00 | 00:30 (next day) |
Table uses the July difference; the tool above applies the exact rule for any date.
Best time to call between London and Tehran
Within normal office hours (09:00–18:00) in both cities: 9:00–15:00 London time. For a compromise outside that window, the fairest slots are the ones nearest each side's start or end of day, alternating who takes the inconvenient hour.
Reverse
Need the other direction? See Tehran to London, or the general time zone converter.
Frequently asked questions
How many hours ahead is Tehran from London?
Tehran is 3.5 hours ahead of London in January and 2.5 hours ahead of in July.
When it is 12:00 noon in London, what time is it in Tehran?
14:30 in summer (); use the tool for a specific date.
Does the converter handle daylight saving?
Yes, for the exact date you enter, using the IANA time-zone rules in your browser.
Privacy
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Last updated 2026-09-23.