What is the Time Difference Between New York and London?
The New York–London pair is the most important business corridor in the world. The time difference is 4 to 5 hours depending on the season, and getting it right avoids costly meeting mistakes.
Time Zone Overview
New York (EST/EDT)
New York is on Eastern Time: EST (UTC-5) in winter, EDT (UTC-4) during DST (second Sunday March to first Sunday November).
London (GMT/BST)
London is on GMT (UTC+0) in winter, BST (UTC+1) during DST (last Sunday March to last Sunday October).
Time Difference
Winter (both standard): London is 5 hours ahead of New York
Summer (both DST): London is 4 hours ahead of New York
Transition weeks: During the ~2 weeks when only one side has switched, the gap is 4 or 5 hours respectively.
Conversion Formula
London time = New York time + 5h (winter) or + 4h (summer)
Conversion Examples
Winter: 9:00 AM EST (NY) → 2:00 PM GMT (London)
Summer: 9:00 AM EDT (NY) → 1:00 PM BST (London)
Quick Reference Table (NY EST → London GMT)
| New York | London |
|---|---|
| 7:00 AM | 12:00 PM |
| 9:00 AM | 2:00 PM |
| 12:00 PM | 5:00 PM |
| 3:00 PM | 8:00 PM |
| 6:00 PM | 11:00 PM |
| 9:00 PM | 2:00 AM (next day) |
Common Use Cases
- Transatlantic business calls and trading
- Coordinating US East Coast with UK teams
- Travel between NYC and London
- Watching UK premieres or US broadcasts
Frequently Asked Questions
What is the time difference between NY and London?
5 hours in winter, 4 in summer.
Why does it change?
Both observe DST but on slightly different switch dates, so the gap shifts between 4 and 5 hours.
Best overlap for meetings?
9 AM-12 PM New York = 2-5 PM London (winter), or 1-4 PM (summer).
If it's 3 PM in NY, what time is it in London?
8 PM GMT (winter) or 7 PM BST (summer).
Does the UK use EST?
No. The UK uses GMT/BST, which is 5/4 hours ahead of US Eastern.
Use our world clock and meeting planner for live, date-aware conversion.