Standard difference
New York is on Eastern Time (UTC−5 in winter, UTC−4 in summer). London is on UTC+0 in winter and UTC+1 in summer. The result is a steady 5-hour gap during most of the year.
Time zones
Time difference between New York and London
London is normally 5 hours ahead of New York. The gap stays at 5 hours for most of the year but briefly drops to 4 hours in spring and rises to 5 hours after both regions complete their DST switches.
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When DST changes the gap
The US switches to daylight saving on the second Sunday of March. The UK switches on the last Sunday of March. For roughly two weeks, the difference is 4 hours. The mirror happens in autumn: the UK falls back on the last Sunday of October, the US on the first Sunday of November.
Best meeting windows NY ↔ London
13:00–16:00 UTC works for both: that's 09:00–12:00 ET in New York and 13:00–16:00 / 14:00–17:00 in London. Avoid before 13:00 UTC (too early in NY) and after 17:00 UTC (after-hours in London).
Tools and pages referenced above
Frequently asked
Is London 5 hours ahead of New York right now?⌄
Almost always. The exception is the brief spring/autumn DST gap when the difference temporarily becomes 4 hours.
What time is it in London when it's 9am in New York?⌄
Usually 14:00 (2pm) in London — except during the DST overlap windows when it can be 13:00 (1pm).
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