TIME ZONE CONVERTER
London to Chicago
Time Converter
Convert London, United Kingdom to Chicago, United States. Compare dates, seasonal differences and meeting hours.
London is 5h or 6h ahead of Chicago in 2026, depending on the date.
9 AM London = 3 AM Chicago
Selected date: November 10, 2026.
THE QUICK REFERENCE
CSVLondon to Chicago conversion table
November 10, 2026 · Date changes are marked.
View the full 24-hour table
| London | Chicago |
|---|---|
| 12:00 AM | 6:00 PM -1 day |
| 1:00 AM | 7:00 PM -1 day |
| 2:00 AM | 8:00 PM -1 day |
| 3:00 AM | 9:00 PM -1 day |
| 4:00 AM | 10:00 PM -1 day |
| 5:00 AM | 11:00 PM -1 day |
| 6:00 AM | 12:00 AM |
| 7:00 AM | 1:00 AM |
| 8:00 AM | 2:00 AM |
| 9:00 AM | 3:00 AM |
| 10:00 AM | 4:00 AM |
| 11:00 AM | 5:00 AM |
| London | Chicago |
|---|---|
| 12:00 PM | 6:00 AM |
| 1:00 PM | 7:00 AM |
| 2:00 PM | 8:00 AM |
| 3:00 PM | 9:00 AM |
| 4:00 PM | 10:00 AM |
| 5:00 PM | 11:00 AM |
| 6:00 PM | 12:00 PM |
| 7:00 PM | 1:00 PM |
| 8:00 PM | 2:00 PM |
| 9:00 PM | 3:00 PM |
| 10:00 PM | 4:00 PM |
| 11:00 PM | 5:00 PM |
Starting with the Chicago working day
These examples start on 2026-11-10 in Chicago.
09:00 Chicago15:00 →London · 2026-11-10
17:00 Chicago23:00 →London · 2026-11-10
ONE CLOCK TIME. THE WHOLE YEAR.
Year CSV09:00 London to Chicago throughout 2026
Keeping 09:00 on the London clock produces 2 different destination clock/date answers in 2026. The ranges below use London calendar dates, including transition days.
| Dates in London · 2026 | Chicago answer | Source → destination offsets | Explore |
|---|---|---|---|
| Jan 1 – Mar 766 dates | 03:00Same date | UTC → UTC−06:00 | |
| Mar 8 – Mar 2821 dates | 04:00Same date | UTC → UTC−05:00 | |
| Mar 29 – Oct 24210 dates | 03:00Same date | UTC+01:00 → UTC−05:00 | |
| Oct 25 – Oct 317 dates | 04:00Same date | UTC → UTC−05:00 | |
| Nov 1 – Dec 3161 dates | 03:00Same date | UTC → UTC−06:00 |
Every calendar date is included, not just workdays. Date ranges include both endpoints. Based on IANA 2026e; future rules may change.
DON’T LOSE A DAY
When does London time become a different date in Chicago?
Your complete source day: 2026-11-10. Each range shows which destination date to use.
London · 2026-11-1000:00–06:00UTC
Chicago · 2026-11-0918:00–24:00UTC−06:00 Previous day
London · 2026-11-1006:00–24:00UTC
Chicago · 2026-11-1000:00–18:00UTC−06:00 Same date
Range starts are included; ends are excluded. 24:00 means midnight at the end of that date. Repeated hours appear separately with their UTC offsets. The strip is proportional to elapsed time.
THE BIGGER PICTURE
2026A year of time differences.
How Chicago compares with London throughout 2026.
JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC
−6h
−5h
−6h
−5h
−6h
Both London and Chicago change their clocks in 2026. The chart shows whether those changes alter the difference.
See exact change periods
| From (UTC, inclusive) | Until (UTC, exclusive) | Chicago vs London |
|---|---|---|
| 1 Jan 2026, 00:00 UTC | 8 Mar 2026, 08:00 UTC | 6h behind |
| 8 Mar 2026, 08:00 UTC | 29 Mar 2026, 01:00 UTC | 5h behind |
| 29 Mar 2026, 01:00 UTC | 25 Oct 2026, 01:00 UTC | 6h behind |
| 25 Oct 2026, 01:00 UTC | 1 Nov 2026, 07:00 UTC | 5h behind |
| 1 Nov 2026, 07:00 UTC | 1 Jan 2027, 00:00 UTC | 6h behind |
CLOCK CHANGES
What changes at the next clock adjustment?
Exact periods outside the most common difference in 2026
The most frequent difference has Chicago 6h behind relative to London. Exceptions:
| From (UTC, inclusive) | Until (UTC, exclusive) | Compared with London |
|---|---|---|
| 8 Mar 2026, 08:00 UTC | 29 Mar 2026, 01:00 UTC | 5h behind |
| 25 Oct 2026, 01:00 UTC | 1 Nov 2026, 07:00 UTC | 5h behind |
PLAN BEYOND A SINGLE DAY
Daily CSVLondon–Chicago working hours through 2026
Every date calculated with your working windows. 261 selected London workdays; public holidays are not applied.
Least shared time2h
Most common2h
Most shared time3h
Days without a 60-min slot0 / 261
A start time that survives the whole year.
Start a 60-minute meeting in London 15:00–16:00.
These starts fit both working windows on every selected London workday in 2026, using a 15-minute start grid. The end of each range is the last valid start.
London: 09:00–17:00, Mon, Tue, Wed, Thu, Fri. Chicago: 09:00–17:00, Mon, Tue, Wed, Thu, Fri.
Calculation details and repeated hours
Overnight shifts belong to their start weekday. Host workday means the source calendar date. Repeated local times use the first occurrence.
TWO PLACES. ONE CONNECTION.
≈ 6,356 km apartAcross the map. Across the clock.
THE DETAILS THAT MATTER
London to Chicago: useful answers
Why is the London to Chicago difference sometimes 5 hours and sometimes 6 hours?
London is 5h or 6h ahead of Chicago in 2026, depending on the date. Both London and Chicago change their clocks in 2026. The chart shows whether those changes alter the difference.
Does the London–Chicago time difference change in 2026?
The published rules produce 5 periods with 2 different offsets in 2026. See the annual chart for the exact boundaries of each period.
Does this conversion change the calendar date?
09:00 in London on 2026-11-10 is 03:00 in Chicago on 2026-11-10. This selected time stays on the same date in both places. Other times can cross midnight.
Can London and Chicago meet during working hours?
Your selected working windows share 2h on 2026-11-10. The planner above checks the whole meeting duration and shows suitable start times. Edit the windows to match your team.
Related time-zone meanings and conversions
Choose the question you need answered
Calculated with IANA 2026e. Working hours are your preferences; public holidays and calendar availability are not included. Our methodology