The Atlantic clock-change gap

The last week of October is a useful test for a London meeting. On 27 October 2026 London has already returned to GMT, while New York is still on its summer offset. London is four hours ahead that day; on 3 November the difference is five hours. A weekly invitation anchored to London can therefore move on the New York clock even when the London time stays unchanged.

A dated view of the local clock

Four examples at 13:00 UTC, calculated with IANA 2026f. These are selected dates, not a live clock.
UTC dateUTC offsetAbbreviationLocal date and time
2026-01-15UTC+00:00GMTThu, 15 Jan 2026 · 13:00
2026-07-15UTC+01:00BSTWed, 15 Jul 2026 · 14:00
2026-10-27UTC+00:00GMTTue, 27 Oct 2026 · 13:00
2026-11-03UTC+00:00GMTTue, 3 Nov 2026 · 13:00

Start from the London end of the working day

For an illustrative 09:00–17:00 schedule in both cities, London and New York share 13:00–17:00 London time on 27 October. Adding Berlin shortens the window to 13:00–16:00. Enter each participant’s actual availability before choosing a duration; a city’s local clock cannot tell you whether its people are free.

Build a plan for this city

Select London, add the other participants, and enter the actual meeting date. The planner uses Europe/London; the abbreviation in the table is a display label. Adjust working days, hours, and meeting length before choosing a shared window. The supported planning range is 2026–2035.