Chicago to London time
Local time in London, United Kingdom, compared with Chicago, United States — hour by hour, through 2026 and 2027.
Draft page. The time data below is computed
from the IANA database and is accurate; the editorial sections are still being written.
This page is excluded from the sitemap and marked noindex until then.
Right now it is — in Chicago and — in London. (Needs JavaScript. Everything below works without it.)
Time difference at a glance
| City | Standard time | Daylight saving | IANA time zone |
|---|---|---|---|
| Chicago, United States | UTC-06:00 | UTC-05:00 | America/Chicago |
| London, United Kingdom | UTC+00:00 | UTC+01:00 | Europe/London |
1 January 2026 – 7 March 2026: London is 6 hours ahead of Chicago.
9 March 2026 – 27 March 2026: London is 5 hours ahead of Chicago.
29 March 2026 – 23 October 2026: London is 6 hours ahead of Chicago.
25 October 2026 – 31 October 2026: London is 5 hours ahead of Chicago.
2 November 2026 – 13 March 2027: London is 6 hours ahead of Chicago.
15 March 2027 – 26 March 2027: London is 5 hours ahead of Chicago.
28 March 2027 – 29 October 2027: London is 6 hours ahead of Chicago.
31 October 2027 – 6 November 2027: London is 5 hours ahead of Chicago.
8 November 2027 – 31 December 2027: London is 6 hours ahead of Chicago.
The gap between Chicago and London is not the same all year, because the two places change their clocks on different dates — or because only one of them changes at all. Check which period your meeting falls into before scheduling.
Days when the gap shifts
On these dates the clocks move, so the gap changes partway through the day. That is why they sit outside the periods above rather than inside one of them.
- 8 March 2026 — Chicago changes its clocks. London goes from 6 hours ahead to 5 hours ahead.
- 28 March 2026 (29 March 2026 in London) — London changes its clocks. London goes from 5 hours ahead to 6 hours ahead.
- 24 October 2026 (25 October 2026 in London) — London changes its clocks. London goes from 6 hours ahead to 5 hours ahead.
- 1 November 2026 — Chicago changes its clocks. London goes from 5 hours ahead to 6 hours ahead.
- 14 March 2027 — Chicago changes its clocks. London goes from 6 hours ahead to 5 hours ahead.
- 27 March 2027 (28 March 2027 in London) — London changes its clocks. London goes from 5 hours ahead to 6 hours ahead.
- 30 October 2027 (31 October 2027 in London) — London changes its clocks. London goes from 6 hours ahead to 5 hours ahead.
- 7 November 2027 — Chicago changes its clocks. London goes from 5 hours ahead to 6 hours ahead.
When each city's clocks move, 2026 and 2027
- Chicago: clocks go forward on 8 March 2026 (UTC-06:00 → UTC-05:00)
- Chicago: clocks go back on 1 November 2026 (UTC-05:00 → UTC-06:00)
- London: clocks go forward on 29 March 2026 (UTC+00:00 → UTC+01:00)
- London: clocks go back on 25 October 2026 (UTC+01:00 → UTC+00:00)
- Chicago: clocks go forward on 14 March 2027 (UTC-06:00 → UTC-05:00)
- Chicago: clocks go back on 7 November 2027 (UTC-05:00 → UTC-06:00)
- London: clocks go forward on 28 March 2027 (UTC+00:00 → UTC+01:00)
- London: clocks go back on 31 October 2027 (UTC+01:00 → UTC+00:00)
Best time to schedule a call
1 January 2026 – 7 March 2026 · 29 March 2026 – 23 October 2026 · 2 November 2026 – 13 March 2027 · 28 March 2027 – 29 October 2027 · 8 November 2027 – 31 December 2027
- 09:00–11:00 in Chicago is 15:00–17:00 in London — 2 hours of shared working time.
9 March 2026 – 27 March 2026 · 25 October 2026 – 31 October 2026 · 15 March 2027 – 26 March 2027 · 31 October 2027 – 6 November 2027
- 09:00–12:00 in Chicago is 14:00–17:00 in London — 3 hours of shared working time.
24-hour conversion: when London is 6 hours ahead of Chicago
Each row is one hour of the day in Chicago, with the matching local time in London. This table applies to 1 January 2026 – 7 March 2026 · 29 March 2026 – 23 October 2026 · 2 November 2026 – 13 March 2027 · 28 March 2027 – 29 October 2027 · 8 November 2027 – 31 December 2027 — every full day of those periods, when London is 6 hours ahead of Chicago. The clock-change days themselves are listed separately above, because the gap shifts partway through them.
| Chicago | London | Both at work? |
|---|---|---|
| 00:00 | 06:00 | Outside hours |
| 01:00 | 07:00 | Outside hours |
| 02:00 | 08:00 | Outside hours |
| 03:00 | 09:00 | One side only |
| 04:00 | 10:00 | One side only |
| 05:00 | 11:00 | One side only |
| 06:00 | 12:00 | One side only |
| 07:00 | 13:00 | One side only |
| 08:00 | 14:00 | One side only |
| 09:00 | 15:00 | Yes — good for a call |
| 10:00 | 16:00 | Yes — good for a call |
| 11:00 | 17:00 | One side only |
| 12:00 | 18:00 | One side only |
| 13:00 | 19:00 | One side only |
| 14:00 | 20:00 | One side only |
| 15:00 | 21:00 | One side only |
| 16:00 | 22:00 | One side only |
| 17:00 | 23:00 | Outside hours |
| 18:00 | 00:00 (next day) | Outside hours |
| 19:00 | 01:00 (next day) | Outside hours |
| 20:00 | 02:00 (next day) | Outside hours |
| 21:00 | 03:00 (next day) | Outside hours |
| 22:00 | 04:00 (next day) | Outside hours |
| 23:00 | 05:00 (next day) | Outside hours |
24-hour conversion: when London is 5 hours ahead of Chicago
Each row is one hour of the day in Chicago, with the matching local time in London. This table applies to 9 March 2026 – 27 March 2026 · 25 October 2026 – 31 October 2026 · 15 March 2027 – 26 March 2027 · 31 October 2027 – 6 November 2027 — every full day of those periods, when London is 5 hours ahead of Chicago. The clock-change days themselves are listed separately above, because the gap shifts partway through them.
| Chicago | London | Both at work? |
|---|---|---|
| 00:00 | 05:00 | Outside hours |
| 01:00 | 06:00 | Outside hours |
| 02:00 | 07:00 | Outside hours |
| 03:00 | 08:00 | Outside hours |
| 04:00 | 09:00 | One side only |
| 05:00 | 10:00 | One side only |
| 06:00 | 11:00 | One side only |
| 07:00 | 12:00 | One side only |
| 08:00 | 13:00 | One side only |
| 09:00 | 14:00 | Yes — good for a call |
| 10:00 | 15:00 | Yes — good for a call |
| 11:00 | 16:00 | Yes — good for a call |
| 12:00 | 17:00 | One side only |
| 13:00 | 18:00 | One side only |
| 14:00 | 19:00 | One side only |
| 15:00 | 20:00 | One side only |
| 16:00 | 21:00 | One side only |
| 17:00 | 22:00 | Outside hours |
| 18:00 | 23:00 | Outside hours |
| 19:00 | 00:00 (next day) | Outside hours |
| 20:00 | 01:00 (next day) | Outside hours |
| 21:00 | 02:00 (next day) | Outside hours |
| 22:00 | 03:00 (next day) | Outside hours |
| 23:00 | 04:00 (next day) | Outside hours |