UTC time to London time
London is 0 hours ahead of UTC in January and 1 hour ahead of in July (UTC UTC/UTC+00:00 in summer; London BST/UTC+01:00). Enter a UTC time below to convert it, or leave it blank to see the current time in both cities.
How to use the UTC to London time
- Type a UTC time (24-hour) and optionally a date, or leave blank for now.
- Click Convert.
- Read the London time and the working-hours table.
Time difference between UTC and London
London is 0 hours ahead of UTC in January and 1 hour ahead of in July. London observes daylight saving time and UTC does not, so the difference changes twice a year. UTC uses UTC time (UTC+00:00 in January, UTC+00:00 in July); London uses Europe/London (UTC+00:00 in January, UTC+01:00 in July).
Working week in UTC and London
UTC: Coordinated Universal Time never changes and has no daylight saving. It is the reference for aviation, servers, logs and international scheduling; London matches it only in winter.
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).
Quick conversion table (summer difference)
| UTC | London |
|---|---|
| 08:00 | 09:00 |
| 09:00 | 10:00 |
| 10:00 | 11:00 |
| 12:00 | 13:00 |
| 14:00 | 15:00 |
| 16:00 | 17:00 |
| 18:00 | 19:00 |
| 20:00 | 21:00 |
| 22:00 | 23:00 |
Table uses the July difference; the tool above applies the exact rule for any date.
Best time to call between UTC and London
Within normal office hours (09:00–18:00) in both cities: 9:00–16:00 UTC 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 London to UTC, or the general time zone converter.
Frequently asked questions
How many hours ahead is London from UTC?
London is 0 hours ahead of UTC in January and 1 hour ahead of in July.
When it is 12:00 noon in UTC, what time is it in London?
13:00 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.