One day across the page, midnight to midnight in London. Each row is painted by its own city's sky and labelled with its own hours; the brackets are nine to five in each clock, and the shaded column is when both are at work.
Zones, names and changes from the IANA tables the browser carries; a skipped or repeated hour is reported, never moved · refreshed nightly · 2026-09-15 02:14 UTC.
The difference through 2026
| From | New York is | The change |
|---|---|---|
| From 1 January | −5 h | — |
| From 8 March 2026 | −4 h | EST → EDT |
| From 29 March 2026 | −5 h | GMT → BST |
| From 25 October 2026 | −4 h | BST → GMT |
| From 1 November 2026 | −5 h | EDT → EST |
How it knows
Every time here is read from the zone tables the browser itself carries — the IANA database by its zone id (America/Los_Angeles, not "Pacific"), through the browser's own Intl — never from an offset typed in by hand. A zone's name is what those tables say for the instant asked: PDT in a Pacific summer, PST in its winter, BST or GMT in London, AEDT or AEST in Melbourne; the page never writes one for the other, and "Pacific time" is expanded to whichever is in force on the date in question.
A clock change makes two kinds of trouble for a converted time, and both are reported rather than moved: an hour the spring-forward removes (2:30 AM on the day the clocks jump from 2:00 to 3:00 does not exist — the page says so and names where the clock landed), and an hour the fall-back repeats (1:30 AM happens twice; the page gives both, the first in daylight time and the second in standard). Dates are explicit in both places, because a converted evening is often tomorrow morning on the other side.
The pair pages find the year's changes in either zone and give the difference after each; the city pages show the day's light beside the clock, because the hour alone says nothing about the sky. The nightly bake fixes the zone facts and the year's dates; the clocks themselves run in your browser.
Make time for the light. Sol for iPhone is coming soon.
Sol for iPhone · Coming soon