Here's a scheduling trap most people only notice after they've missed a call: Europe and the United States do not end daylight saving time on the same day. In 2026, Europe falls back on Sunday, October 25, while the US waits until Sunday, November 1. For the week in between, every transatlantic time difference shifts by an hour — and recurring meetings quietly land at the wrong local time.

If you've ever Googled "is London 4 or 5 hours ahead right now?" during late October, this is why. This guide gives you the exact differences for the 2026 gap week, who changes clocks when, and how to keep your calendar straight.

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When Each Side Changes Its Clocks in 2026

The mismatch isn't an accident — it's two different laws with two different rules:

Europe (EU directive): last Sunday of October. Clocks go back at 01:00 UTC — 2am becomes 1am in the UK, 3am becomes 2am in most of central Europe. Date in 2026: October 25.
United States (Uniform Time Act): first Sunday of November. Clocks go back at 2am local time, becoming 1am. Date in 2026: November 1.

The one-week autumn gap happens every single year. In spring it's worse: the US springs forward on the second Sunday of March while Europe waits for the last Sunday, creating a three-week gap every March.

The Time Differences During Gap Week (Oct 25 – Nov 1, 2026)

During the gap week, Europe is on standard time while the US is still on daylight time. Every US–Europe difference is one hour smaller than usual:

London ↔ New York: 4 hours (normally 5). A 9am New York meeting is 1pm in London, not 2pm.
London ↔ Chicago: 5 hours (normally 6).
London ↔ Los Angeles: 7 hours (normally 8).
Berlin/Paris ↔ New York: 5 hours (normally 6).
Berlin/Paris ↔ Chicago: 6 hours (normally 7).

After November 1, everything snaps back to the familiar winter offsets: London 5 hours ahead of New York, central Europe 6 hours ahead.

Key takeaway: if your calendar invite was created with a fixed local time in mind, double-check every transatlantic appointment for the week of October 25.

Meetings Are Where the Gap Week Bites

Calendar apps are actually good at this — if the meeting was set up correctly. The trap is human behavior, not software:

Invites stored with timezones auto-adjust. A recurring 3pm London / 10am New York call correctly becomes 2pm London during the gap week if both people accepted an invite with timezone attached.
Hand-typed times don't. "Let's talk Thursday at 4pm your time" — which 4pm? Whose timezone was that decided in last month?
Teams that skipped invites get burned. Informal standups agreed verbally in one person's local time drift by an hour for exactly one week, then drift back.

The highest-risk window is the first two working days after Europe changes (Monday and Tuesday, October 26–27). That's when muscle memory says "it's afternoon there" and it isn't.

A quick habit that prevents most of it: before confirming any meeting this week, paste both cities into a free timezone converter and read the actual overlap rather than trusting memory. For one-off checks, the time zone calculator shows the current difference between any two zones — including the shortened gap-week offsets.

Who Doesn't Change Clocks at All

The gap week is also when no-DST regions shift relative to everyone:

Arizona (except the Navajo Nation) and Hawaii stay on standard time year-round. Phoenix is 3 hours behind New York during gap week, then 2 hours behind after November 1 — while most Americans assume Arizona matches Mountain Time.
Most of Asia and Africa never observe DST. India's gap to New York is 9.5 hours this week, becoming 10.5 hours after the US falls back. China's 12-hour gap to Eastern becomes 13.
Southern hemisphere countries are heading into summer, not winter — Australia and New Zealand are on their own DST schedules entirely.

This is why "what time is it there?" has no single answer in late October: it depends on which of three clock regimes a city is in.

Why the Two-Sided System Persists

The EU voted to scrap seasonal clock changes back in 2018 — but never agreed which permanent time to adopt, so the directive was shelved and Europe keeps changing twice a year. In the US, the bipartisan Sunshine Protection Act to make daylight time permanent has passed committee stages repeatedly without becoming law, and sleep-medicine groups actively lobby against permanent DST.

The result: no change is coming for 2027, and the March gap (three weeks) plus the October/November gap (one week) are on your calendar every year. If you schedule internationally, treat the second half of October and the first half of March as recurring "check the timezone" seasons.

A Pre-Gap-Week Checklist (Two Minutes)

Confirm every recurring US–Europe meeting for October 26–30 shows the same local time you expect in your calendar app.
Ask international colleagues to re-send invites if any meeting was arranged by typed times in chat rather than calendar invites.
Set a reminder for the evening of October 31 — the US change happens at 2am on November 1, and the following Monday everything shifts back. (A countdown timer set to the November 1 switch makes the re-shift impossible to forget.)
If you're in Europe and calling US customers or support lines, remember their business hours run an hour "later" in your local time this week only.

And once the clocks settle, the darker evenings arrive fast — the sunset shift is the part people actually feel. You can check exactly when your sunrise and sunset times move after November 1, or read the full breakdown in our guide to what ends on November 1 and your new winter sunset.

FAQ

Is the UK 4 or 5 hours ahead of New York right now? From October 25 to November 1, 2026, the UK is 4 hours ahead of New York. Before October 25 and after November 1, it's 5 hours. The 4-hour window only exists during the one-week DST gap.

Why do Europe and the US change clocks on different dates? EU law sets the change for the last Sunday of October; US law uses the first Sunday of November. The mismatch is deliberate in each region's legislation and repeats every year — one week in autumn, three weeks in spring.

Will a repeating calendar invite adjust for the DST gap automatically? Yes, if the invite was sent with timezones attached (normal for Outlook, Google Calendar, and Teams). Both attendees see their correct local time, which means the meeting shifts by an hour in one person's view during gap week. Manual "let's meet at 4" arrangements do not adjust.

Which US states don't change their clocks? Arizona (except the Navajo Nation) and Hawaii stay on standard time year-round. Most US territories — Puerto Rico, Guam, the US Virgin Islands, and American Samoa — also skip DST.

Does the time difference to India or China change during gap week? No — those countries don't observe DST. Their difference to Europe changes on October 25, and to the US on November 1, purely because the Western side moved.