EST to GMT
London is 5 hours ahead of New York, and does not change across the year.
EST and GMT across the year
Both zones change their clocks on the same dates, so the gap between them never moves — London is 5 hours ahead of New York all year. Note that this is a fixed difference, not a fixed offset: both cities still shift by an hour twice a year, so a time expressed in UTC will change even though the gap between these two does not.
EST: Eastern Time is EDT (UTC−4) in summer and EST (UTC−5) in winter. The figures here follow the current rule rather than assuming winter.
GMT: The UK is on GMT in winter and BST (UTC+1) in summer, so 'GMT' and 'London time' are the same thing for only half the year. Strictly, GMT never shifts — if you need a fixed reference, use UTC.
EST to GMT at a glance
Working-hours conversions, using the July relationship. The live converter above always reflects today.
| EST — New York | GMT — London |
|---|---|
| 8:00 am | 1:00 pm |
| 9:00 am | 2:00 pm |
| 10:00 am | 3:00 pm |
| 11:00 am | 4:00 pm |
| 12:00 pm | 5:00 pm |
| 1:00 pm | 6:00 pm |
| 2:00 pm | 7:00 pm |
| 3:00 pm | 8:00 pm |
| 4:00 pm | 9:00 pm |
| 5:00 pm | 10:00 pm |
Scheduling between New York and London
The workable window is 9:00 am to 1:00 pm in New York — 2:00 pm to 6:00 pm in London. That is 4 hours out of a nine-hour working day, and everything outside it costs somebody their morning or their evening.
4 hours is a comfortable overlap; you can schedule inside it without much negotiation. The useful habit is still to put the London time in the invitation body as well as relying on the calendar to convert, because the person reading it on a phone will trust what they can see.
The two edges behave differently. Booking at 9:00 am New York time means London is late in its afternoon and may be winding down; booking at 12:00 pm means New York is mid-afternoon while London is closer to the end of the day. Where the decision matters, give the later-in-the-day side the earlier slot.
If you are the one in New York
London is ahead of you, which means their day is already ending as yours gets going. By the time you are at your desk at 9:00 am, it is 2:00 pm there — so anything you send in your morning arrives in their afternoon, with time to act on it. The practical consequence is that your late afternoon is dead time for anything needing a reply from London: they are asleep, and you will not hear back until your next morning.
So the discipline that pays off is front-loading. Anything London needs from you should go out early in your day while they are still working; anything you need from them should be asked for before you leave, so it is waiting when you return. Treat their evening as the deadline, not yours.