London to New York Time Converter
New York is 5 hours behind London. When it is noon in London, it is 7:00 AM in New York.
Daylight saving note: Normally New York is 5 hours behind London. During short March/October transition windows, New York can be 4 hours behind while London is on GMT and New York is on EDT.
GMT/BST to ET Conversion Table
Full 24-hour reference table. Use the live clocks above for the exact current offset.
| 🇬🇧 GMT/BST | 🇺🇸 GMT → ESTUTC+0 to UTC-5 | 🇺🇸 BST → EDTUTC+1 to UTC-4 | 🇺🇸 GMT → EDTUTC+0 to UTC-4 transition weeks | Note |
|---|---|---|---|---|
| 00:00 | 7:00 PM | 7:00 PM | 8:00 PM | prev day |
| 01:00 | 8:00 PM | 8:00 PM | 9:00 PM | prev day |
| 02:00 | 9:00 PM | 9:00 PM | 10:00 PM | prev day |
| 03:00 | 10:00 PM | 10:00 PM | 11:00 PM | prev day |
| 04:00 | 11:00 PM | 11:00 PM | 12:00 AM | prev day |
| 05:00 | 12:00 AM | 12:00 AM | 1:00 AM | |
| 06:00 | 1:00 AM | 1:00 AM | 2:00 AM | |
| 07:00 | 2:00 AM | 2:00 AM | 3:00 AM | |
| 08:00 | 3:00 AM | 3:00 AM | 4:00 AM | |
| 09:00 | 4:00 AM | 4:00 AM | 5:00 AM | |
| 10:00 | 5:00 AM | 5:00 AM | 6:00 AM | |
| 11:00 | 6:00 AM | 6:00 AM | 7:00 AM | |
| 12:00 | 7:00 AM | 7:00 AM | 8:00 AM | |
| 13:00 | 8:00 AM | 8:00 AM | 9:00 AM | |
| 14:00 | 9:00 AM | 9:00 AM | 10:00 AM | |
| 15:00 | 10:00 AM | 10:00 AM | 11:00 AM | |
| 16:00 | 11:00 AM | 11:00 AM | 12:00 PM | |
| 17:00 | 12:00 PM | 12:00 PM | 1:00 PM | |
| 18:00 | 1:00 PM | 1:00 PM | 2:00 PM | |
| 19:00 | 2:00 PM | 2:00 PM | 3:00 PM | |
| 20:00 | 3:00 PM | 3:00 PM | 4:00 PM | |
| 21:00 | 4:00 PM | 4:00 PM | 5:00 PM | |
| 22:00 | 5:00 PM | 5:00 PM | 6:00 PM | |
| 23:00 | 6:00 PM | 6:00 PM | 7:00 PM |
"prev day" = converted time falls on the previous calendar day.
Best Hours to Schedule London–New York Calls
From London, New York becomes available at 2:00 PM GMT (9:00 AM EST). The overlap window is 2:00–5:00 PM London (9:00 AM–12:00 PM New York). London professionals working with US clients typically block afternoons for transatlantic calls.
About London (GMT/BST)
London (GMT/BST) leads New York by 5 hours for most of the year. This means London's entire morning (9 AM–2 PM) passes before New York opens. Financial firms and media companies in London use this morning window for European client work, then switch to US-facing tasks from 2 PM.
About New York (ET)
New York (EST/EDT) runs 5 hours behind London. When New York opens at 9:00 AM EST, London is at 2:00 PM — already halfway through the afternoon. The brief 3-hour overlap (2–5 PM London / 9 AM–12 PM New York) is the core transatlantic business window.
How to Avoid London–New York Conversion Mistakes
New York is still on the previous calendar day before these GMT/BST times: 5:00 AM for GMT → EST, 5:00 AM for BST → EDT, 4:00 AM for GMT → EDT. For example, 12:00 AM GMT/BST is 7:00 PM in New York on the previous day (GMT → EST).
Abbreviations can be ambiguous here: London switches between GMT and BST across the year, while New York switches between ET and EDT. City names and IANA time zones (Europe/London and America/New_York) are safer for exact scheduling if you're automating anything, since they resolve the right abbreviation automatically instead of needing a manual seasonal check.
Worked Example: The Weeks When London and New York Are Four Hours Apart
If you're booking from London, 2:00 PM is 9:00 AM in New York on the usual five hour gap. The US moves on the second Sunday in March and the UK on the last Sunday in March, so in the weeks between them the same 2:00 PM is 10:00 AM.
The same happens in the days between the UK moving back on the last Sunday in October and the US doing so on the first Sunday in November. New York's 9:00 AM is 2:00 PM in London normally, and 1:00 PM in those weeks.
Frequently Asked Questions
What time is 2 PM London in New York?
2:00 PM London (GMT) is 9:00 AM New York (EST). This is why London firms schedule US calls for the afternoon — 2 PM London is New York's 9 AM business open.
How many hours is New York behind London?
New York is 5 hours behind London for most of the year. During DST transitions, the gap can briefly be 4 hours when London is on GMT and New York is on EDT.
What time is it in New York when London is 9 AM?
9:00 AM London (GMT) is 4:00 AM New York (EST) — very early morning. London starts its working day well before New York.
What is the best time for a London-New York call from London?
2:00–5:00 PM London (GMT) maps to 9:00 AM–12:00 PM New York (EST). This is the standard London "US call block" — schedule all transatlantic meetings in this window.