London zone
GMT+1 (GMT+1)
UTC zone
UTC (GMT-0)
Difference
1 hour behind London
Business overlap
7h (9-5 windows)
Working hours overlap
Each cell is one hour in London. Filled cells mark when 9 AM – 5 PM in London and UTC both apply.
7 hours per day
- London
- GMT+1
- UTC
- GMT-0
- Difference
- -1h
- Business overlap
- 7h
Hour-by-hour conversion
Each row shows the matching local time in UTC for an hour in London.
| London | UTC | Day | Window |
|---|---|---|---|
| 12:00 AM | 11:00 PM | previous day | — |
| 1:00 AM | 12:00 AM | same day | — |
| 2:00 AM | 1:00 AM | same day | — |
| 3:00 AM | 2:00 AM | same day | — |
| 4:00 AM | 3:00 AM | same day | — |
| 5:00 AM | 4:00 AM | same day | — |
| 6:00 AM | 5:00 AM | same day | — |
| 7:00 AM | 6:00 AM | same day | — |
| 8:00 AM | 7:00 AM | same day | — |
| 9:00 AM | 8:00 AM | same day | — |
| 10:00 AM | 9:00 AM | same day | Both 9-5 |
| 11:00 AM | 10:00 AM | same day | Both 9-5 |
| 12:00 PM | 11:00 AM | same day | Both 9-5 |
| 1:00 PM | 12:00 PM | same day | Both 9-5 |
| 2:00 PM | 1:00 PM | same day | Both 9-5 |
| 3:00 PM | 2:00 PM | same day | Both 9-5 |
| 4:00 PM | 3:00 PM | same day | Both 9-5 |
| 5:00 PM | 4:00 PM | same day | — |
| 6:00 PM | 5:00 PM | same day | — |
| 7:00 PM | 6:00 PM | same day | — |
| 8:00 PM | 7:00 PM | same day | — |
| 9:00 PM | 8:00 PM | same day | — |
| 10:00 PM | 9:00 PM | same day | — |
| 11:00 PM | 10:00 PM | same day | — |
Best meeting windows
If both teams keep standard 9 AM – 5 PM hours, the overlap window is roughly 10:00 AM – 5:00 PM in London time. That gives you 7 hours per workday for live meetings.
Tighter overlap is achievable by having the side with later working hours start earlier, or by treating the first and last hours of each side as flexible. The bar above marks every hour where both cities sit inside a 9 AM – 5 PM window.
About converting London time to UTC time
London follows the Europe/London time zone (currently GMT+1, GMT+1), while UTC follows UTC (currently UTC, GMT-0). UTC is 1 hour behind London right now.
London observes daylight saving time, while UTC does not. The offset between the two cities changes by one hour at the daylight saving transitions.
Daylight saving transitions in 2026
London
- Spring forward · Sunday, March 29, 2026
- Fall back · Sunday, October 25, 2026
UTC
Does not observe daylight saving time.
Reverse this conversion
UTC to London
Open the converter
Plan a meeting between London and UTC
More conversions from London
Frequently asked questions
- How many hours is London from UTC?
- UTC is 1 hour behind London right now.
- What time is 9:00 AM London in UTC?
- 9:00 AM in London is 8:00 AM in UTC.
- What time is 5:00 PM London in UTC?
- 5:00 PM in London is 4:00 PM in UTC.
- When do London and UTC business hours overlap?
- Standard 9 AM - 5 PM working hours overlap for about 7 hours, roughly from 10:00 AM to 5:00 PM in London time.
- Does daylight saving time change the difference between London and UTC?
- London observes daylight saving time while UTC does not, so the offset between them changes by one hour twice a year.
Local time page
Time in London
Local time page
Time in UTC