Working hours: 09:00–17:00 local. Green = both working.Purple = one side only.
Frequently Asked Questions
What is the difference between mdt and cdt?
Mountain Daylight Time (mdt) is UTC-6 and Central Daylight Time (cdt) is UTC-5. The difference between them is 1 hours.
Where is mdt used?
Mountain Daylight Time (mdt) is used in USA and surrounding regions. The IANA timezone identifier is America/Denver.
Where is cdt used?
Central Daylight Time (cdt) is used in USA and surrounding regions. The IANA timezone identifier is America/Chicago.
How do I convert mdt to cdt?
Use the interactive converter above. Drag the time slider to any mdt time and the cdt equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.
MDT (Denver) is 1 hour behind CDT (Chicago). Midday in MDT (Denver) lines up with 13:00 in CDT (Chicago).
MDT (Denver) observes America/Denver and CDT (Chicago) observes America/Chicago — a 1 hour gap between them.
Daily overlap window
There is a 7-hour window each day where both MDT (Denver) and CDT (Chicago) are within standard business hours (09:00–17:00).
00:0006:0012:0018:0024:00
MDT (Denver)
CDT (Chicago)
Overlap (7h)
Optimal meeting slots
MDT (Denver) and CDT (Chicago) share 7 hours of business hours overlap daily. Showing the 3 most balanced slots — see the time table below for the full window.
09:00 Denver / 10:00 Chicago✓ Both working
10:00 Denver / 11:00 Chicago✓ Both working
11:00 Denver / 12:00 Chicago✓ Both working
Assumes a standard 9 AM–5 PM workday in each location's local timezone.
Upcoming public holidays
⚡ Watch out — upcoming holidays on both sides. Verify availability in advance.
MDT (Denver)8 holidays
Jun 19Juneteenth National Independence DaySOON
Jul 3Independence Day
Sep 7Labour Day
Oct 12Columbus Day
Oct 12Indigenous Peoples' Day
CDT (Chicago)8 holidays
Jun 19Juneteenth National Independence DaySOON
Jul 3Independence Day
Sep 7Labour Day
Oct 12Columbus Day
Oct 12Indigenous Peoples' Day
How to work with MDT (Denver) and CDT (Chicago) time zones
Coordinating between MDT (Denver) (USA) and CDT (Chicago) (USA) means working around a 1-hour time difference. The 7-hour overlap window gives both teams a natural slot for real-time collaboration without anyone working outside normal hours.
💡 How to schedule across these time zones
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Schedule at 09:00–10:00 (MDT (Denver)) for a 10:00–11:00 slot in CDT (Chicago) — the sweet spot where both teams are working.
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Schedule at 10:00–11:00 (MDT (Denver)) for a 11:00–12:00 slot in CDT (Chicago) — the sweet spot where both teams are working.
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Schedule at 11:00–12:00 (MDT (Denver)) for a 12:00–13:00 slot in CDT (Chicago) — the sweet spot where both teams are working.
Recurring meetings are particularly vulnerable to DST shifts. The ClockinSync Chrome Extension alerts you before the offset changes.
Drag the slider at the top to convert any MDT (Denver) time instantly. You can also type natural language like "3pm", "15:00", or a location name to get an immediate answer.
