The transatlantic corridor is the friendliest one there is — and people still blow it, because they memorize "New York is five hours behind London" and never notice the two weeks a year that's wrong. A 10 AM call in New York is a perfectly civilized 3 PM in Berlin most of the year. Book that same recurring slot in mid-March and someone joins an hour early to an empty room.
The US–Europe overlap is generous — a real shared afternoon exists almost every day — but it isn't a fixed number. The gap breathes between 5 and 9 hours across regions, and twice a year it slips by an hour while the two continents change their clocks on different dates.
Here are the windows that work, by US region, and the two dates on the calendar to distrust.
The US–Europe gap is 5 to 9 hours — and briefly off by one
The transatlantic gap depends on which coast and which European zone you mean:
- US East ↔ UK (London): normally 5 hours (New York behind London).
- US East ↔ Western Europe (Paris, Berlin, Madrid, CET): normally 6 hours.
- US West ↔ Europe: 8 hours (Los Angeles to London) to 9 hours (LA to CET).
Those hold most of the year because the US, the UK, and continental Europe all observe daylight saving — so the offset stays put while everyone shifts together. The catch is that they don't shift on the same day.
The two weeks a year the math breaks
In 2026, the US springs forward on March 8, but the EU and UK don't change until March 29. For those three weeks, the US has jumped ahead while Europe hasn't — so New York and London sit 4 hours apart, not 5, and New York and Paris 5 hours, not 6. A mirror window opens in autumn: the UK and EU fall back on October 25, but the US waits until November 1, so the gap shrinks by an hour again for that week.
Everyone remembers "New York is five hours behind London." Almost nobody remembers the three weeks in March when it's four. That's where the recurring 10 AM call quietly breaks.
It's a small shift, but it lands your recurring meeting an hour off for people who scheduled by memory. The fix isn't to memorize the dates — it's to let a tool that knows the current offsets tell you, and to set recurring invites from a calendar that stores the time zone rather than a fixed hour. Our time-zone guide has the full breakdown of how DST desync creates these gaps.
The best meeting window by US region
The transatlantic sweet spot is US morning meets European afternoon. Treat these as starting points and confirm the exact slot with the tool below, since the windows above shift twice a year.
| Corridor | A comfortable daily window | Notes |
|---|---|---|
| US East ↔ London | 8:00–11:00 AM ET · 1:00–4:00 PM GMT/BST | The easiest corridor on earth |
| US East ↔ CET (Paris/Berlin) | 9:00–11:00 AM ET · 3:00–5:00 PM CET | Before Europe logs off for the day |
| US Central ↔ CET | 9:00–10:30 AM CT · 4:00–5:30 PM CET | Narrower, still workable |
| US West ↔ Europe | 8:00–9:00 AM PT · 5:00–6:00 PM CET | Tight; catch Europe before it leaves |
US East ↔ UK and Western Europe
This is the corridor everyone wishes they had. A New York or Boston team's morning maps cleanly onto a London or Frankfurt afternoon. Aim for 9–11 AM Eastern and you land in Europe's 2–5 PM — late enough that Europe is past lunch, early enough that nobody's watching the clock to leave. Push past noon Eastern, though, and you start eating into European dinner.
US West ↔ Europe (the narrow one)
The West Coast is where the transatlantic gap stops being generous. Los Angeles to Central Europe is nine hours; by the time California is at its desk, Europe is heading home. The only real live window is early West-Coast morning against late European afternoon — roughly 8 AM Pacific = 5 PM in Paris. Miss it and you're into async, or a rotation where one side flexes.
Find your exact US–Europe window
The regional windows above get you close, but the exact minute depends on today's date — and, twice a year, on which side has already changed its clocks. Drop your cities into our free World Clock and drag the meeting-planner slider: it uses the live offsets, so it's already right during the March and October desync weeks when memory isn't.
Add New York (or your city) plus London, Paris, or wherever your counterparts are, and scrub to a time where everyone's working hours light up green. For the full method behind reading that overlap, see our guide to finding working-hours overlap between any two time zones.
A realistic transatlantic meeting rhythm
Because the overlap is genuinely good, the temptation is to over-use it — to fill that shared afternoon with standing meetings until it's the only time anything gets decided. Resist it. Protect the transatlantic window for the calls that actually need everyone live, and push status, reviews, and decisions into writing so they don't compete for those hours. Our remote-collaboration guide covers the async habits that keep a good overlap from becoming a meeting swamp, and if you also run an APAC team, the US–Australia corridor is where the overlap really does run out.
FAQ
What is the best time for a US–Europe meeting?
US morning against European afternoon. For US East to the UK or Central Europe, 9–11 AM Eastern (2–5 PM in Europe) is the reliable window. For the US West Coast, you're limited to early Pacific morning against late European afternoon, around 8 AM PT / 5 PM CET.
What is the time difference between New York and London?
Normally 5 hours (New York behind London). But for about three weeks in March and one week around late October, when the US and UK change clocks on different dates, it's temporarily 4 hours. Continental Europe (Paris, Berlin) is normally 6 hours ahead of New York.
Does Europe observe daylight saving time?
Yes. The EU and UK change clocks on the last Sunday of March and the last Sunday of October — in 2026, March 29 and October 25. That's about three weeks after the US springs forward and one week before it falls back, which is exactly why the transatlantic gap slips by an hour twice a year.
What time is 9 AM EST in London?
2 PM in winter (when New York is on standard time and London on GMT). In summer it's also 2 PM London time, since both shift together. The exception is the short March and October windows when the offset is 4 hours instead of 5 — confirm the exact time with a world clock during those weeks.
Why does the US–Europe time difference change during the year?
Because the US and Europe start and end daylight saving on different dates. When one side has changed its clocks and the other hasn't yet, the usual offset is off by an hour until the second side catches up. It happens for a few weeks each spring and autumn.
