Best Time to Call London from New York
🕐 Live Timezone Overlap: London & New York
London and New York are separated by 5 hours, which is manageable but unforgiving if you let it drift. Working hours in both cities run 9am to 6pm, producing a 4-hour overlap each weekday. That window is worth protecting. London afternoons align with New York mornings, and both cities have active finance cultures that treat this slot seriously. Plan around it deliberately, and cross-Atlantic meetings become routine rather than a scheduling headache.
Time Difference: London and New York
New York is currently 5 hours behind London. The live offsets are London UTC+1 and New York UTC-4. London observes daylight saving and New York also observes daylight saving, so the offset shifts twice a year if both sides aren't already aligned.
London currently sits at UTC+1, having moved to British Summer Time, while New York is at UTC-4 on Eastern Daylight Time. Both cities observe DST, but their clocks do not change on the same weekend. Each autumn, UK clocks revert one week before US clocks do, compressing the gap to 4 hours for roughly seven days. That brief period shifts the overlap window without warning if you are booking meetings weeks ahead across London and New York.
Best Times to Meet
The 4-hour overlap runs 2pm to 6pm in London and 9am to 1pm in New York. Inside that 4-hour window, the cleanest slot is typically 2pm to 4pm London time, which is 9am to 11am in New York. New York mornings are sharp: the NYSE opens at 9:30am ET and sets the rhythm for US-east business hours. In London, the City aligns to the New York open at 2:30pm GMT, so both sides are already in gear. Avoid the London lunch hour of 12:30 to 1:30pm, which falls just before the window opens.
Working Hours Overlap Explained
London operates on Europe/London (currently UTC+1). New York operates on America/New_York (currently UTC-4). The table below maps a standard 9:00 AM–6:00 PM day in London to New York's local time.
| London time | New York time | Status |
|---|---|---|
| 9:00 AM | 4:00 AM | New York outside hours |
| 10:00 AM | 5:00 AM | New York outside hours |
| 11:00 AM | 6:00 AM | New York outside hours |
| 12:00 PM | 7:00 AM | New York outside hours |
| 1:00 PM | 8:00 AM | New York just starting |
| 2:00 PM | 9:00 AM | New York in business hours |
| 3:00 PM | 10:00 AM | New York in business hours |
| 4:00 PM | 11:00 AM | New York in business hours |
| 5:00 PM | 12:00 PM | New York in business hours |
| 6:00 PM | 1:00 PM | New York in business hours |
Tips for Scheduling Across London and New York
- Book London-New York calls between 2pm and 4pm London time to catch New York before pre-lunch focus breaks.
- In autumn, check whether UK clocks have changed before US clocks: the gap briefly shrinks to 4 hours for about a week.
- Avoid scheduling across London on Fridays after 4pm; the working day often ends early there.
- New York finance teams treat 4pm to 6pm ET as a prime slot for European partner calls, so that block fills fast.
- Cross both the UK and US holiday calendars: Christmas, Independence Day, and Thanksgiving each create multi-day gaps.
Public Holidays and Working Weeks
Both cities follow a Monday to Friday working week. Most London office workers finish around 5:30pm, with Fridays often winding down by 4pm, so late Friday calls rarely land well. In New York, client meetings commonly run from 4pm to 6pm to reach European partners. Upcoming holidays to check: New Year's Day on 1 January affects London, while Independence Day on 4 July closes New York. Always verify both calendars before confirming any cross-city meeting.