London zone
GMT+1 (GMT+1)
Washington D.C. zone
EDT (GMT-4)
Difference
5 hours behind London
Business overlap
3h (9-5 windows)
Working hours overlap
Each cell is one hour in London. Filled cells mark when 9 AM – 5 PM in London and Washington D.C. both apply.
3 hours per day
- London
- GMT+1
- Washington D.C.
- GMT-4
- Difference
- -5h
- Business overlap
- 3h
Hour-by-hour conversion
Each row shows the matching local time in Washington D.C. for an hour in London.
| London | Washington D.C. | Day | Window |
|---|---|---|---|
| 12:00 AM | 7:00 PM | previous day | — |
| 1:00 AM | 8:00 PM | previous day | — |
| 2:00 AM | 9:00 PM | previous day | — |
| 3:00 AM | 10:00 PM | previous day | — |
| 4:00 AM | 11:00 PM | previous day | — |
| 5:00 AM | 12:00 AM | same day | — |
| 6:00 AM | 1:00 AM | same day | — |
| 7:00 AM | 2:00 AM | same day | — |
| 8:00 AM | 3:00 AM | same day | — |
| 9:00 AM | 4:00 AM | same day | — |
| 10:00 AM | 5:00 AM | same day | — |
| 11:00 AM | 6:00 AM | same day | — |
| 12:00 PM | 7:00 AM | same day | — |
| 1:00 PM | 8:00 AM | same day | — |
| 2:00 PM | 9:00 AM | same day | Both 9-5 |
| 3:00 PM | 10:00 AM | same day | Both 9-5 |
| 4:00 PM | 11:00 AM | same day | Both 9-5 |
| 5:00 PM | 12:00 PM | same day | — |
| 6:00 PM | 1:00 PM | same day | — |
| 7:00 PM | 2:00 PM | same day | — |
| 8:00 PM | 3:00 PM | same day | — |
| 9:00 PM | 4:00 PM | same day | — |
| 10:00 PM | 5:00 PM | same day | — |
| 11:00 PM | 6:00 PM | same day | — |
Best meeting windows
If both teams keep standard 9 AM – 5 PM hours, the overlap window is roughly 2:00 PM – 5:00 PM in London time. That gives you 3 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 Washington D.C. time
London follows the Europe/London time zone (currently GMT+1, GMT+1), while Washington D.C. follows America/New_York (currently EDT, GMT-4). Washington D.C. is 5 hours behind London right now.
Both cities observe daylight saving time. If their transition weekends differ, the offset shifts by one hour for a few weeks each spring and autumn.
Daylight saving transitions in 2026
London
- Spring forward · Sunday, March 29, 2026
- Fall back · Sunday, October 25, 2026
Washington D.C.
- Spring forward · Sunday, March 8, 2026
- Fall back · Sunday, November 1, 2026
Reverse this conversion
Washington D.C. to London
Open the converter
Plan a meeting between London and Washington D.C.
More conversions from London
Frequently asked questions
- How many hours is London from Washington D.C.?
- Washington D.C. is 5 hours behind London right now.
- What time is 9:00 AM London in Washington D.C.?
- 9:00 AM in London is 4:00 AM in Washington D.C..
- What time is 5:00 PM London in Washington D.C.?
- 5:00 PM in London is 12:00 PM in Washington D.C..
- When do London and Washington D.C. business hours overlap?
- Standard 9 AM - 5 PM working hours overlap for about 3 hours, roughly from 2:00 PM to 5:00 PM in London time.
- Does daylight saving time change the difference between London and Washington D.C.?
- Both London and Washington D.C. observe daylight saving time. If their transition dates differ, the offset between them shifts by an hour for a few weeks each year.
Local time page
Time in London
Local time page
Time in Washington D.C.