Working hours: 09:00–17:00 local. Green = both working.Purple = one side only.
Frequently Asked Questions
What is the difference between cdt and mdt?
Central Daylight Time (cdt) is UTC-5 and Mountain Daylight Time (mdt) is UTC-6. The difference between them is 1 hours.
Where is cdt used?
Central Daylight Time (cdt) is used in USA and surrounding regions. The IANA timezone identifier is America/Chicago.
Where is mdt used?
Mountain Daylight Time (mdt) is used in USA and surrounding regions. The IANA timezone identifier is America/Denver.
How do I convert cdt to mdt?
Use the interactive converter above. Drag the time slider to any cdt time and the mdt equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.
CDT (Chicago) to MDT (Denver) — exact time difference
CDT (Chicago) is 1 hour ahead of MDT (Denver). Midday in CDT (Chicago) lines up with 11:00 in MDT (Denver).
CDT (Chicago) is in the America/Chicago timezone. MDT (Denver) is in America/Denver. The difference is 1 hour.
Working hours overlap
There is a 7-hour window each day where both CDT (Chicago) and MDT (Denver) are within standard business hours (09:00–17:00).
00:0006:0012:0018:0024:00
CDT (Chicago)
MDT (Denver)
Overlap (7h)
When to schedule across time zones
Both CDT (Chicago) and MDT (Denver) are in standard hours simultaneously for 7h per day. 3 recommended slots shown below.
10:00 Chicago / 09:00 Denver✓ Both working
11:00 Chicago / 10:00 Denver✓ Both working
12:00 Chicago / 11:00 Denver✓ Both working
Based on standard 09:00–17:00 working hours in each location's local time.
Upcoming public holidays
⚡ Watch out — upcoming holidays on both sides. Verify availability in advance.
CDT (Chicago)8 holidays
Jun 19Juneteenth National Independence DaySOON
Jul 3Independence Day
Sep 7Labour Day
Oct 12Columbus Day
Oct 12Indigenous Peoples' Day
MDT (Denver)8 holidays
Jun 19Juneteenth National Independence DaySOON
Jul 3Independence Day
Sep 7Labour Day
Oct 12Columbus Day
Oct 12Indigenous Peoples' Day
How to work with CDT (Chicago) and MDT (Denver) time zones
Working across CDT (Chicago) (USA) and MDT (Denver) (USA) involves a 1-hour gap. The good news: there is a 7-hour mutual window in standard business hours that lets both sides collaborate without anyone joining at an unreasonable hour.
💡 How to schedule across these time zones
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10:00–11:00 in CDT (Chicago) = 09:00–10:00 in MDT (Denver). Both sides are in standard business hours during this window.
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11:00–12:00 in CDT (Chicago) = 10:00–11:00 in MDT (Denver). Both sides are in standard business hours during this window.
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12:00–13:00 in CDT (Chicago) = 11:00–12:00 in MDT (Denver). Both sides are in standard business hours during this window.
DST transitions can silently shift your meeting times by an hour. The ClockinSync Chrome Extension tracks these changes automatically so you never get caught off guard.
Use the time slider above to find the exact equivalent time for any moment in CDT (Chicago). The input bar accepts natural language like "3pm", "15:30", or "9am Rome" for instant conversions.
