Working hours: 09:00–17:00 local. Green = both working.Purple = one side only.
Frequently Asked Questions
What is the difference between cst and mst?
Central Standard Time (cst) is UTC-5 and Mountain Standard Time (mst) is UTC-6. The difference between them is 1 hours.
Where is cst used?
Central Standard Time (cst) is used in USA and surrounding regions. The IANA timezone identifier is America/Chicago. Note: cst is ambiguous and may refer to other timezones.
Where is mst used?
Mountain Standard Time (mst) is used in USA and surrounding regions. The IANA timezone identifier is America/Denver.
How do I convert cst to mst?
Use the interactive converter above. Drag the time slider to any cst time and the mst equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.
CST (Chicago) to MST (Denver) — exact time difference
CST (Chicago) is 1 hour ahead of MST (Denver). When CST (Chicago) clocks hit noon, MST (Denver) reads 11:00.
CST (Chicago) is in the America/Chicago timezone. MST (Denver) is in America/Denver. The difference is 1 hour.
Working hours overlap
Every working day, CST (Chicago) and MST (Denver) are both in business hours for 7 hours simultaneously.
00:0006:0012:0018:0024:00
CST (Chicago)
MST (Denver)
Overlap (7h)
When to schedule across time zones
Both CST (Chicago) and MST (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.
Holiday calendar for both locations
⚡ Both locations have upcoming holidays, check availability before scheduling.
CST (Chicago)7 holidays
Jul 3Independence DaySOON
Sep 7Labour Day
Oct 12Columbus Day
Oct 12Indigenous Peoples' Day
Nov 11Veterans Day
MST (Denver)7 holidays
Jul 3Independence DaySOON
Sep 7Labour Day
Oct 12Columbus Day
Oct 12Indigenous Peoples' Day
Nov 11Veterans Day
Working across CST (Chicago) and MST (Denver)
Working across CST (Chicago) (USA) and MST (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.
💡 Best practice for cross-timezone meetings
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10:00–11:00 in CST (Chicago) = 09:00–10:00 in MST (Denver). Both sides are in standard business hours during this window.
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11:00–12:00 in CST (Chicago) = 10:00–11:00 in MST (Denver). Both sides are in standard business hours during this window.
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12:00–13:00 in CST (Chicago) = 11:00–12:00 in MST (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 CST (Chicago). The input bar accepts natural language like "3pm", "15:30", or "9am Rome" for instant conversions.