UK to US Time Difference (25 Oct to 1 Nov 2026): Why London Is 4 Hours Ahead of New York
Most of the year, London is 5 hours ahead of New York, 6 hours ahead of Chicago and 8 hours ahead of Los Angeles. From Sunday, 25 October 2026 to Sunday, 1 November 2026, each US zone that observes daylight saving time sits 1 hour closer to the UK. Britain ended British Summer Time a week before the US ends daylight saving time under the Uniform Time Act.
Live status, October 28, 2026: London is on GMT (UTC+0) and New York is still on EDT (UTC−4), so the gap is 4 hours. It returns to 5 hours when US clocks go back at 2:00 AM EDT on Sunday, 1 November, which is 6:00 AM GMT.
1. Date-aware UK to US time converter (2026 to 2027)
Pick a date, a time and a US zone. The converter checks the exact clock-change moment in both countries, so results stay right on transition Sundays. It also flags repeated and missing hours.
Same moment in the UK and all seven US zones
2. UK to US time difference by region: gap week and from 1 November 2026
Britain goes back to GMT (UTC+0) on the last Sunday in October, 25 October 2026 at 2:00 AM BST (GOV.UK, Royal Museums Greenwich). Most of the US stays on daylight saving time until the first Sunday in November, 1 November 2026 at 2:00 AM local time (NIST).
| US time zone and key cities | 25 Oct to 1 Nov 2026 (gap week) | From 1 Nov 2026 (normal winter) | When it is 2:00 PM in London |
|---|---|---|---|
| Eastern (ET) New York, Boston, Washington DC, Miami, Atlanta | 4 hours behind UK (EDT, UTC−4) | 5 hours behind UK (EST, UTC−5) | 10:00 AM EDT (gap week) 9:00 AM EST (from 1 Nov) |
| Central (CT) Chicago, Dallas, Houston, Austin | 5 hours behind UK (CDT, UTC−5) | 6 hours behind UK (CST, UTC−6) | 9:00 AM CDT 8:00 AM CST |
| Mountain (MT) Denver, Salt Lake City, Albuquerque | 6 hours behind UK (MDT, UTC−6) | 7 hours behind UK (MST, UTC−7) | 8:00 AM MDT 7:00 AM MST |
| Arizona (no DST) Phoenix, Tucson, Scottsdale | 7 hours behind UK (MST, UTC−7) | 7 hours behind UK (MST, UTC−7) | 7:00 AM MST both periods |
| Pacific (PT) Los Angeles, San Francisco, Seattle, Las Vegas | 7 hours behind UK (PDT, UTC−7) | 8 hours behind UK (PST, UTC−8) | 7:00 AM PDT 6:00 AM PST |
| Alaska (AKT) Anchorage, Juneau, Fairbanks | 8 hours behind UK (AKDT, UTC−8) | 9 hours behind UK (AKST, UTC−9) | 6:00 AM AKDT 5:00 AM AKST |
| Hawaii (no DST) Honolulu, Maui, Kauai | 10 hours behind UK (HST, UTC−10) | 10 hours behind UK (HST, UTC−10) | 4:00 AM HST both periods |
3. US stock market hours in the UK (NYSE, Nasdaq and the October 2026 FOMC)
For UK investors and City traders, the trading week of Monday 26 to Friday 30 October 2026 runs 1 hour earlier in UK time than usual. From Monday 2 November the usual UK times return.
| Session or event | New York time | UK time, 26 to 30 Oct 2026 | UK time from 2 Nov 2026 |
|---|---|---|---|
| NYSE and Nasdaq core session: open | 9:30 AM ET | 1:30 PM GMT (13:30) | 2:30 PM GMT (14:30) |
| NYSE and Nasdaq core session: close | 4:00 PM ET | 8:00 PM GMT (20:00) | 9:00 PM GMT (21:00) |
| Early pre-market window* Varies by venue and broker | 4:00 to 9:30 AM ET | 8:00 AM to 1:30 PM GMT | 9:00 AM to 2:30 PM GMT |
| After-hours window* Varies by venue and broker | 4:00 to 8:00 PM ET | 8:00 PM to 12:00 AM GMT | 9:00 PM to 1:00 AM GMT (next day) |
| FOMC policy statement Wed 28 Oct 2026, meeting 27 to 28 Oct | 2:00 PM EDT | 6:00 PM GMT (18:00) | Normally 7:00 PM UK time |
| Fed Chair press conference Wed 28 Oct 2026 | 2:30 PM EDT | 6:30 PM GMT (18:30) | Normally 7:30 PM UK time |
4. Why recurring Outlook, Teams and Google Calendar meetings shift by 1 hour
A standing weekly call can suddenly appear 1 hour earlier or later between 26 and 30 October 2026. Calendar apps anchor a recurring series to the event’s own time zone, usually the organiser’s, and then show attendees the matching local time.
| Event time zone | Standing slot | 26 to 30 Oct 2026 | From Mon 2 Nov 2026 |
|---|---|---|---|
| US zone (for example America/New_York) | 9:00 AM ET / 2:00 PM UK | Stays 9:00 AM EDT for US attendees but shows 1:00 PM GMT in the UK (1 hour earlier). | Back to 9:00 AM EST / 2:00 PM GMT. |
| UK zone (for example Europe/London) | 2:00 PM UK / 9:00 AM ET | Stays 2:00 PM GMT for UK attendees but shows 10:00 AM EDT in the US (1 hour later). | Back to 2:00 PM GMT / 9:00 AM EST. |
5. Complete 2026 and 2027 UK to US clock-change gap calendar
The US changes clocks on the second Sunday in March and the first Sunday in November. The UK changes on the last Sunday in March and the last Sunday in October. So the London to New York gap drops from 5 hours to 4 hours twice a year.
| Gap window | Starts (gap becomes 4h for NY) | Ends (5h returns) | Length and zones |
|---|---|---|---|
| Spring 2026 | Sun 8 March 2026 US springs forward to EDT | Sun 29 March 2026 UK springs forward to BST | 21 days London GMT vs New York EDT |
| Autumn 2026 (now) | Sun 25 October 2026 UK falls back to GMT | Sun 1 November 2026 US falls back to EST at 6:00 AM GMT | 7 days London GMT vs New York EDT |
| Spring 2027 | Sun 14 March 2027 US springs forward to EDT | Sun 28 March 2027 UK springs forward to BST | 14 days London GMT vs New York EDT |
| Autumn 2027 | Sun 31 October 2027 UK falls back to GMT | Sun 7 November 2027 US falls back to EST | 7 days London GMT vs New York EDT |
7. Frequently asked questions: UK to US time difference
Why is the UK only 4 hours ahead of New York from 25 October to 1 November 2026?
London is on GMT (UTC+0) and New York is on EDT (UTC−4). The UK ended British Summer Time on 25 October 2026, while the US stays on daylight saving time for one more week, until 1 November 2026.
When does the UK to US time difference return to 5 hours in 2026?
On Sunday, 1 November 2026 at 2:00 AM EDT (6:00 AM GMT), when US clocks go back to 1:00 AM EST (UTC−5).
What time does the US stock market open in the UK from 26 to 30 October 2026?
The regular NYSE and Nasdaq session (9:30 AM to 4:00 PM ET) runs from 1:30 PM to 8:00 PM GMT that week, one hour earlier than usual. Normal 2:30 PM to 9:00 PM UK hours return on Monday, 2 November 2026.
What time is the October 2026 Federal Reserve (FOMC) statement in the UK?
The FOMC meets on 27 and 28 October 2026. The statement on Wednesday 28 October at 2:00 PM EDT is 6:00 PM GMT in London, and the press conference at 2:30 PM EDT is 6:30 PM GMT. It is normally 7:00 PM UK time, so check official Fed notices on the day.
Why did my recurring UK and US calendar meeting move by 1 hour this week?
Outlook, Google Calendar and Apple Calendar anchor a recurring event to its own time zone. During the gap week, an invite set in a US zone shows 1 hour earlier on UK calendars, and an invite set in UK time shows 1 hour later on US calendars, until 1 November 2026.
When do the UK to US 4-hour gaps happen in 2027?
From Sunday 14 March to Sunday 28 March 2027 (14 days), when the US is on EDT before the UK is on BST. Then from Sunday 31 October to Sunday 7 November 2027 (7 days), when the UK is back on GMT before the US is on EST.
What is the UK to California time difference now?
Until 1 November 2026, California (PDT, UTC−7) is 7 hours behind London (GMT). From 1 November it is 8 hours behind (PST, UTC−8).
Sources and verification
UK rules: GOV.UK and Royal Museums Greenwich. US rules: US Department of Transportation and NIST.
FOMC timing: Federal Reserve October 2026 calendar and the FOMC calendar. City times: Time and Date.
The converter uses the UK rule (last Sunday of March and October at 1:00 UTC) and the US rule (second Sunday of March and first Sunday of November at 2:00 local time). It ignores local exceptions such as the Navajo Nation. Checked October 28, 2026.