Greenwich Mean Time
GMT means UTC throughout the year.
TIME ZONE CONVERTER
Chicago to GMT
Time Converter
Convert Chicago, United States to Greenwich Mean Time. Compare dates, seasonal differences and meeting hours.
Chicago is 5h or 6h behind GMT in 2026, depending on the date.
9 AM Chicago = 3 PM GMT
Selected date: November 3, 2026. Fixed abbreviations retain their stated UTC offsets.
THE QUICK REFERENCE
CSVChicago to GMT conversion table
November 3, 2026 · Date changes are marked.
View the full 24-hour table
| Chicago | GMT |
|---|---|
| 12:00 AM | 6:00 AM |
| 1:00 AM | 7:00 AM |
| 2:00 AM | 8:00 AM |
| 3:00 AM | 9:00 AM |
| 4:00 AM | 10:00 AM |
| 5:00 AM | 11:00 AM |
| 6:00 AM | 12:00 PM |
| 7:00 AM | 1:00 PM |
| 8:00 AM | 2:00 PM |
| 9:00 AM | 3:00 PM |
| 10:00 AM | 4:00 PM |
| 11:00 AM | 5:00 PM |
| Chicago | GMT |
|---|---|
| 12:00 PM | 6:00 PM |
| 1:00 PM | 7:00 PM |
| 2:00 PM | 8:00 PM |
| 3:00 PM | 9:00 PM |
| 4:00 PM | 10:00 PM |
| 5:00 PM | 11:00 PM |
| 6:00 PM | 12:00 AM +1 day |
| 7:00 PM | 1:00 AM +1 day |
| 8:00 PM | 2:00 AM +1 day |
| 9:00 PM | 3:00 AM +1 day |
| 10:00 PM | 4:00 AM +1 day |
| 11:00 PM | 5:00 AM +1 day |
Starting with the GMT working day
These examples start on 2026-11-03 in GMT.
09:00 GMT03:00 →Chicago · 2026-11-03
17:00 GMT11:00 →Chicago · 2026-11-03
Which time-zone meaning are we using?
ONE CLOCK TIME. THE WHOLE YEAR.
Year CSV09:00 Chicago to GMT throughout 2026
Keeping 09:00 on the Chicago clock produces 2 different destination clock/date answers in 2026. The ranges below use Chicago calendar dates, including transition days.
| Dates in Chicago · 2026 | GMT answer | Source → destination offsets | Explore |
|---|---|---|---|
| Jan 1 – Mar 766 dates | 15:00Same date | UTC−06:00 → UTC | |
| Mar 8 – Oct 31238 dates | 14:00Same date | UTC−05:00 → UTC | |
| Nov 1 – Dec 3161 dates | 15:00Same date | UTC−06:00 → UTC |
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 Chicago time become a different date in GMT?
Your complete source day: 2026-11-03. Each range shows which destination date to use.
Chicago · 2026-11-0300:00–18:00UTC−06:00
GMT · 2026-11-0306:00–24:00UTC Same date
Chicago · 2026-11-0318:00–24:00UTC−06:00
GMT · 2026-11-0400:00–06:00UTC Next day
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 GMT compares with Chicago throughout 2026.
JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC
+6h
+5h
+6h
Chicago changes its UTC offset in 2026. GMT is a fixed offset.
See exact change periods
| From (UTC, inclusive) | Until (UTC, exclusive) | GMT vs Chicago |
|---|---|---|
| 1 Jan 2026, 00:00 UTC | 8 Mar 2026, 08:00 UTC | 6h ahead |
| 8 Mar 2026, 08:00 UTC | 1 Nov 2026, 07:00 UTC | 5h ahead |
| 1 Nov 2026, 07:00 UTC | 1 Jan 2027, 00:00 UTC | 6h ahead |
CLOCK CHANGES
What changes at the next clock adjustment?
Exact periods outside the most common difference in 2026
The most frequent difference has GMT 5h ahead relative to Chicago. Exceptions:
| From (UTC, inclusive) | Until (UTC, exclusive) | Compared with Chicago |
|---|---|---|
| 1 Jan 2026, 00:00 UTC | 8 Mar 2026, 08:00 UTC | 6h ahead |
| 1 Nov 2026, 07:00 UTC | 1 Jan 2027, 00:00 UTC | 6h ahead |
PLAN BEYOND A SINGLE DAY
Daily CSVChicago–GMT working hours through 2026
Every date calculated with your working windows. 261 selected Chicago workdays; public holidays are not applied.
Least shared time2h
Most common3h
Most shared time3h
Days without a 60-min slot0 / 261
A start time that survives the whole year.
Start a 60-minute meeting in Chicago 09:00–10:00.
These starts fit both working windows on every selected Chicago workday in 2026, using a 15-minute start grid. The end of each range is the last valid start.
Chicago: 09:00–17:00, Mon, Tue, Wed, Thu, Fri. GMT: 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.
THE DETAILS THAT MATTER
Chicago to GMT: useful answers
Why is the Chicago to GMT difference sometimes 5 hours and sometimes 6 hours?
Chicago is 5h or 6h behind GMT in 2026, depending on the date. Chicago changes its UTC offset in 2026. GMT is a fixed offset.
Does the Chicago–GMT time difference change in 2026?
The published rules produce 3 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 Chicago on 2026-11-03 is 15:00 in GMT on 2026-11-03. This selected time stays on the same date in both places. Other times can cross midnight.
Can Chicago and GMT meet during working hours?
Your selected working windows share 2h on 2026-11-03. 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
Calculated with IANA 2026e. Working hours are your preferences; public holidays and calendar availability are not included. Our methodology