Best Time to Call Between New York and London
New York and London are separated by 5 hours most of the year. London is always ahead. During daylight saving transitions, the gap briefly shifts to 4 or 6 hours.
The permanent overlap
The most reliable overlap window for business calls is:
9:00 AM – 12:00 PM New York (2:00 PM – 5:00 PM London)
This window works year-round because both sides are within standard business hours.
Morning London, afternoon New York
If the London team prefers morning meetings:
7:00 AM – 9:00 AM London (2:00 AM – 4:00 AM New York — not practical)
This does not work. The gap is too wide for early-morning London meetings.
Best compromise
Schedule calls between 10:00 AM and 11:30 AM Eastern Time. This places the meeting at 3:00 PM to 4:30 PM London time, which is comfortable for both sides.
DST complications
In spring, the US shifts clocks forward 2–3 weeks before the UK. During this gap, the time difference narrows to 4 hours.
In autumn, the UK shifts back 1–2 weeks before the US. The difference temporarily widens to 6 hours.
Quick reference
New YorkLondonGood for calls?
8:00 AM1:00 PM✅ Yes
10:00 AM3:00 PM✅ Best
12:00 PM5:00 PM⚠️ End of day London
2:00 PM7:00 PM❌ After hours London
Use our [Time Comparison Tool](/compare/new-york/london) for live calculations.
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