London vs New York: How Many Hours Apart Are They Really?
“Understand when the gap between London and New York is five hours and when it briefly shrinks to four, so your recurring meetings stay aligned all year.”
London vs New York: How Many Hours Apart Are They Really?
People often assume London is always five hours ahead of New York, but that isn’t true every week of the year. The real answer depends on when each region changes its clocks for daylight saving time.
The Standard Five-Hour Difference
In winter, London operates on GMT (UTC+0) while New York uses EST (UTC-5), creating a clean five-hour difference. This same five-hour gap returns during summer when both regions are on their respective daylight times, with London at UTC+1 and New York at UTC-4.
The Temporary Four-Hour Shift
Two short periods in 2026 change that pattern:
From March 8 to March 29, 2026, New York has moved to DST while London has not, narrowing the gap to four hours.
From October 25 to November 1, 2026, London has reverted to GMT while New York remains on DST, again making the difference four hours.
The easiest way to avoid confusion is to compare live times for both cities on exact-time.now. That view reflects the current offsets and shows whether your “usual” meeting time has effectively shifted for one side.