The New York to London connection is the world's busiest business corridor. Thousands of meetings, video calls, and deal discussions happen across this 5-hour time gap every single day, and getting the timing wrong wastes half a call on "wait, what time is it there?" Our time zone meeting planner handles this corridor visually and adjusts for DST automatically.
Time Zone Overview: ET vs GMT/BST
New York operates on Eastern Time (ET), which is UTC−5 during standard time (EST, roughly November through mid-March) and UTC−4 during daylight saving time (EDT, roughly mid-March through early November). London operates on Greenwich Mean Time (GMT, UTC+0) during the winter months and British Summer Time (BST, UTC+1) during the summer. This creates two distinct scheduling regimes that every transatlantic team needs to understand.
| Season | New York | London | Time Difference |
|---|---|---|---|
| Summer (Mar–Nov) | UTC−4 (EDT) | UTC+1 (BST) | 5 hours — London ahead |
| Winter (Nov–Mar) | UTC−5 (EST) | UTC+0 (GMT) | 5 hours — London ahead |
| Gap weeks | UTC−4 (EDT) | UTC+0 (GMT) | 4 hours — London ahead |
Most of the year, the gap is a steady 5 hours. When it's 9:00 AM in New York, it's 2:00 PM in London. This is actually one of the most forgiving transatlantic gaps — large enough that both sides get a full morning before the call but small enough that nobody works outside normal hours.
The Golden Overlap Window
The sweet spot for New York–London meetings is 8:00 AM – 11:00 AM Eastern Time, which maps to 1:00 PM – 4:00 PM GMT. During BST summer, the same ET window produces a 2:00 PM – 5:00 PM London time — still comfortably within the working day. Here's how a standard working day aligns:
- 8:00 AM ET / 1:00 PM GMT — Both sides fresh. New York just starting, London post-lunch.
- 9:00 AM ET / 2:00 PM GMT — Prime time. Most popular slot for recurring meetings.
- 10:00 AM ET / 3:00 PM GMT — Still comfortable. London wrapping up key afternoon work.
- 11:00 AM ET / 4:00 PM GMT — Last call. London heading toward end of day.
- 12:00 PM ET / 5:00 PM GMT — Borderline. New York lunch, London leaving.
The morning window is overwhelmingly preferred because it respects both time zones' natural rhythms. New York gets the call done early and London gets it done before the evening commute. Very few teams schedule in the New York afternoon — that pushes London past 6:00 PM and into personal time.
Daylight Saving Time Complications
Both New York and London observe DST — but they change on different dates. This creates a brief period each spring and autumn where the time gap temporarily shrinks to just 4 hours. Here's what happens:
In March, the US springs forward on the second Sunday. The UK follows roughly two to three weeks later on the last Sunday of March. During those gap weeks, New York is on EDT (UTC−4) but London is still on GMT (UTC+0). The difference drops to 4 hours, and everyone gets an extra hour of overlap. London at 1:00 PM is already 9:00 AM in New York — giving you until noon ET before London hits 5:00 PM.
In October/November, the UK falls back on the last Sunday of October, while the US falls back on the first Sunday of November. Same 4-hour gap, same extra overlap window, but reversed — this time London has already returned to GMT while New York is still on EDT. These gap weeks are actually the easiest times to schedule because both sides get a wider overlap.
The key takeaway: if you have a recurring weekly meeting, anchor it to one time zone and let the other adjust. Most teams anchor to New York — "every Tuesday at 9 AM ET" — and London participants accept that it's 2 PM in winter and 2 PM in summer, steady all year. The only disruption is during the gap weeks when London gets an unexpected bonus hour.
Practical Tips for NY–London Teams
Morning calls win. The most productive transatlantic teams schedule between 8:00–10:00 AM ET. New York is sharp, London hasn't checked out mentally, and everyone can still get a full afternoon of work done afterward.
Watch the "DST trap." In late March and late October, double-check everyone's calendar. A meeting series set in Google Calendar or Outlook usually auto-adjusts, but if you're coordinating manually or across different calendar platforms, those gap weeks can throw people off by a full hour.
Rotate if you can. If your team includes people on both sides who consistently take the less convenient slot (London team members who always stay past 5 PM), rotate once a month to a New York-early / London-late-morning cadence. Even one rotation per month builds goodwill.
Planning a transatlantic call? Find the perfect overlap in seconds — Try the Time Zone Meeting Planner →