Calgary to Chicago Time Difference
Chicago is 1 hour ahead of Calgary. When it's 10:26:54 AM in Calgary, it's 11:26:54 AM in Chicago.
How Many Hours Ahead Is Chicago From Calgary?
Chicago is 1 hour ahead of Calgary. So Calgary is 1 hour behind Chicago looking the other way — the same gap, described from the other end.
In practice that means a working day in Calgary starts when it is already 10:00 AM in Chicago. The gap is not fixed all year: it becomes on Sunday, November 1, 2026, when Chicago changes its clocks.
Best Time to Call Calgary and Chicago
Both cities are inside normal business hours between 9:00 AM and 4:00 PM in Calgary — that's 10:00 AM to 5:00 PM in Chicago. That's a 7-hour window, so a call fits comfortably in either side's working day.
both at work Calgary only Chicago only neither — hours shown along the strip are Calgary local time.
Convert a Specific Time
Pick any date and time in Calgary to see the exact equivalent in Chicago.
Common Times Converted
Calgary time on the left, Chicago time on the right.
Calgary to Chicago: Full 24-Hour Conversion Table
Based on today, Sunday, October 11, 2026 in Calgary. Shaded rows are working hours; the darker shade marks the hours when both cities are at work.
| Calgary | Chicago | Working hours |
|---|---|---|
| 12:00 AM | 1:00 AM | — |
| 1:00 AM | 2:00 AM | — |
| 2:00 AM | 3:00 AM | — |
| 3:00 AM | 4:00 AM | — |
| 4:00 AM | 5:00 AM | — |
| 5:00 AM | 6:00 AM | — |
| 6:00 AM | 7:00 AM | — |
| 7:00 AM | 8:00 AM | — |
| 8:00 AM | 9:00 AM | Chicago only |
| 9:00 AM | 10:00 AM | Both cities |
| 10:00 AM | 11:00 AM | Both cities |
| 11:00 AM | 12:00 PM | Both cities |
| 12:00 PM | 1:00 PM | Both cities |
| 1:00 PM | 2:00 PM | Both cities |
| 2:00 PM | 3:00 PM | Both cities |
| 3:00 PM | 4:00 PM | Both cities |
| 4:00 PM | 5:00 PM | Calgary only |
| 5:00 PM | 6:00 PM | — |
| 6:00 PM | 7:00 PM | — |
| 7:00 PM | 8:00 PM | — |
| 8:00 PM | 9:00 PM | — |
| 9:00 PM | 10:00 PM | — |
| 10:00 PM | 11:00 PM | — |
| 11:00 PM | 12:00 AM next day | — |
Understanding the Calgary – Chicago Time Difference
Calgary runs on America/Edmonton, currently MDT (UTC-6:00). Chicago runs on America/Chicago, currently CDT (UTC-5:00). The gap of 1 hour is simply the distance between those two offsets.
Both cities observe Daylight Saving Time, but they don't switch on the same date — so for a few weeks each year the gap between them is different again. The next shift is on Sunday, November 1, 2026, when Chicago adjusts its clocks and the difference becomes . Anything scheduled across that date needs checking again.
Full clock-change dates: Daylight Saving Time in Canada · Daylight Saving Time in the United States.
Calgary today
Chicago today
Frequently Asked Questions
What is the time difference between Calgary and Chicago?
Chicago is currently 1 hour ahead of Calgary. That gap becomes on Sunday, November 1, 2026, when Chicago changes its clocks.
How many hours ahead is Chicago from Calgary?
Chicago is 1 hour ahead of Calgary. Looking at it the other way, Calgary is 1 hour behind Chicago.
What time is it in Chicago when it is 9:00 AM in Calgary?
When it is 9:00 AM in Calgary, it is 10:00 AM in Chicago.
Is Chicago ahead of or behind Calgary?
Chicago is 1 hour ahead of Calgary. Chicago reaches each point in the day first, so its working day is already finishing while Calgary is still getting started.
What is the best time to call between Calgary and Chicago?
Between 9:00 AM and 4:00 PM Calgary time, which is 10:00 AM to 5:00 PM in Chicago. Both cities are inside normal business hours during that window.
Does the time difference between Calgary and Chicago change during the year?
Yes. Both cities observe Daylight Saving Time, and they do not always switch on the same date, so the gap between them shifts during the year. It changes to on Sunday, November 1, 2026.
What time zones are Calgary and Chicago in?
Calgary uses the America/Edmonton time zone, currently MDT (UTC-6:00). Chicago uses America/Chicago, currently CDT (UTC-5:00).