Time Difference Between United States and London
As of 31 August 2026, London is 5 hours ahead of United States. That number is not constant. Over the course of a year, because of daylight saving changes, London, United Kingdom ranges from 4 hours ahead to 5 hours ahead relative to New York, United States. The calculator below is always up to date.
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New York, United States
18:34
Mon, Aug 31, 2026
UTC-4 · EDT · America/New_York
London, United Kingdom
+5h23:34
Mon, Aug 31, 2026
UTC+1 · Europe/London
London is 5 hours ahead of United States.
Time zone details
| Place | Local date | Time zone | UTC offset | Summer time |
|---|---|---|---|---|
| United States | Monday, August 31, 2026 | EDTAmerica/New_York | UTC-4 | Active now |
| London | Monday, August 31, 2026 | Europe/London | UTC+1 | Active now |
United States: The United States spans six main time zones. This page uses Eastern Time; Pacific Time is 3 hours behind it.
Hour by hour: United States to London
Every hour of today in United States and what it is in London. Highlighted rows fall inside London working hours (09:00–18:00).
| United States | London |
|---|---|
| 00:00 | 05:00 |
| 01:00 | 06:00 |
| 02:00 | 07:00 |
| 03:00 | 08:00 |
| 04:00 | 09:00 |
| 05:00 | 10:00 |
| 06:00 | 11:00 |
| 07:00 | 12:00 |
| 08:00 | 13:00 |
| 09:00 | 14:00 |
| 10:00 | 15:00 |
| 11:00 | 16:00 |
| United States | London |
|---|---|
| 12:00 | 17:00 |
| 13:00 | 18:00 |
| 14:00 | 19:00 |
| 15:00 | 20:00 |
| 16:00 | 21:00 |
| 17:00 | 22:00 |
| 18:00 | 23:00 |
| 19:00 | 00:00next day |
| 20:00 | 01:00next day |
| 21:00 | 02:00next day |
| 22:00 | 03:00next day |
| 23:00 | 04:00next day |
Best time to call or meet
Overlapping working hours
09:00–13:00 in United States (14:00–18:00 in London)
Both places are inside 09:00–18:00 for 4 hours a day. Anything in this window works without asking anyone to stay late.
Reasonable calling hours
08:00–16:00 in United States (13:00–21:00 in London)
Both people are awake and available between 08:00 and 21:00 local time during this window.
When this difference changes
London puts its clocks back on Sunday, October 25, 2026
The local offset moves from UTC+1 to UTC. After that date, London is 4 hours ahead of United States — instead of 5 hours ahead, as it is today.
United States puts its clocks back on Sunday, November 1, 2026
The local offset moves from UTC-4 to UTC-5. The gap between United States and London stays at 5 hours because both places change at the same time.
Planning something with more than two places?
Adding a third city usually kills the obvious answer. The Meeting Time Finder takes up to five cities at once and shows only the hours that work for everybody.
United States and London: common questions
What is the time difference between United States and London?
As of 31 August 2026, London is 5 hours ahead of United States. The gap is not fixed: across the year, London ranges from 4 hours ahead to 5 hours ahead relative to United States, as clocks change. The calculator on this page always shows the difference for right now.
When it is 9:00 AM in United States, what time is it in London?
It is 02:00 PM in London, United Kingdom. Use the time field in the calculator above to check any other hour.
Is London ahead of or behind United States?
London is ahead of United States by 5 hours at the moment. In practical terms, the working day in London starts and ends earlier in United States terms.
Do United States and London observe daylight saving time?
Both United States and London change their clocks, but not on the same dates. That is why the gap is not fixed: across the year, London ranges from 4 hours ahead to 5 hours ahead relative to United States.
What is the best time to call London from United States?
Working hours overlap between 09:00 and 13:00 United States time, which is 14:00 to 18:00 in London. Calls inside that window reach both sides during the normal working day.
Related comparisons
Local dates shown for New York, United States (UTC-4) and London, United Kingdom (UTC+1) were generated on Monday, August 31, 2026 UTC and refresh in your browser.