MDT to Chicago
+1hMDT
MDTSOURCEChicago
CDTGreen rows indicate typical business hours (9 AM - 5 PM)
MDT and CDT on the World Map
The map below highlights the MDT (Mountain Daylight Time) and CDT (Central Standard Time) timezone regions across the globe.
MDT – Mountain Daylight Time
UTC-06:00Mountain Daylight Time (MDT) is the daylight saving offset in the Mountain Time Zone, 6 hours behind UTC.
- •MDT shares the same offset as CST (UTC-06:00).
- •Arizona does not switch to MDT, remaining on MST.
CST – Central Standard Time
UTC-06:00Central Standard Time (CST) is the time zone for the central United States, Canada, and Mexico, 6 hours behind UTC.
- •CST covers 20 US states fully or partially.
- •Chicago and Houston are the two largest cities in the Central Time Zone.
- •Mexico City, one of the world's most populous cities, operates on CST.
- •CST is 1 hour behind EST and 2 hours ahead of PST.
About Chicago
WikipediaChicago operates on Central Time (CST/CDT), 1 hour behind New York. Home to CME and CBOE, Chicago is a global center for derivatives trading.
The Chicago Board of Trade is the world's oldest futures and options exchange.
Comparing Time Zones: MDT and Chicago
MDT runs on Mountain Daylight Time (MDT) at UTC-06:00. Chicago runs on Central Daylight Time (CDT) at UTC-05:00, also currently on daylight saving time. That puts MDT 1 hour ahead of Chicago — a difference of +1h at the current offsets.
In practice, when it is 9:00 AM in MDT it is 10:00 AM in Chicago. Midnight in MDT is 1:00 AM in Chicago.Chicago observes daylight saving time while MDT does not, so the gap narrows or widens by an hour part of the year.
MDT to Chicago time conversion table
| MDT (MDT) | Chicago (CDT) | Day |
|---|---|---|
| 12:00 AM | 1:00 AM | same day |
| 6:00 AM | 7:00 AM | same day |
| 7:00 AM | 8:00 AM | same day |
| 8:00 AM | 9:00 AM | same day |
| 9:00 AM | 10:00 AM | same day |
| 12:00 PM | 1:00 PM | same day |
| 3:00 PM | 4:00 PM | same day |
| 5:00 PM | 6:00 PM | same day |
| 6:00 PM | 7:00 PM | same day |
| 9:00 PM | 10:00 PM | same day |
Why people convert MDT to Chicago time
- Scheduling a call from MDT to Chicago: a 10:00 AM start in MDT lands at 11:00 AM in Chicago, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both MDT and Chicago are inside the 9-to-5 working day between 9:00 AM and 4:00 PM MDT time (10:00 AM–5:00 PM CDT). That is roughly 7 hours of usable overlap.
- Watching a live event or market open: MDT viewers need 10:00 AM in Chicago to catch a 9:00 AM start there, and 11:00 PM if the event is anchored to MDT.
- Always state the zone abbreviation, not just the hour. "3:00 PM MDT" is unambiguous; "3 PM" across a +1h gap is not.
- Block 9:00 AM–4:00 PM MDT as the recurring meeting window if you work primarily from MDT and need Chicago colleagues present.
- Chicago: Clocks fall back on Sun, Nov 1, 2026. Any meeting series spanning that date will shift by an hour in local time.
About MDT (Mountain Daylight Time)
Mountain Daylight Time (MDT) is observed during summer months in the Mountain Time Zone, except in Arizona which stays on MST year-round. MDT aligns with Central Standard Time (CST) at UTC-06:00.
About CST (Central Standard Time)
Central Standard Time (CST) covers the central region of North America. It is the second most populous time zone in the US, including major cities like Chicago, Houston, and Dallas. CST is also used in Mexico City and much of Central America including Guatemala, Honduras, El Salvador, and Costa Rica. During summer, most of the US and Canada switch to Central Daylight Time (CDT, UTC-05:00), while Mexico and Central American countries generally remain on CST.
Best time to call between MDT and Chicago
Both MDT and Chicago sit inside the 9 AM – 5 PM working day between 9:00 AM–4:00 PM MDT, which is 10:00 AM–5:00 PM CDT. That gives roughly 7 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
MDT and Chicago share 7 hours of working-hours overlap (9:00 AM–4:00 PM MDT), so scheduling a live meeting is straightforward.
MDT is 1 hour ahead of Chicago (MDT UTC-06:00 → CDT UTC-05:00). The shared working window is 9:00 AM–4:00 PM MDT. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
MDT
☀ Currently in DST
Standard: UTC-07:00 · DST: UTC-06:00
Clocks fall back on Sun, Nov 1, 2026
Chicago
☀ Currently in DST
Standard: UTC-06:00 · DST: UTC-05:00
Clocks fall back on Sun, Nov 1, 2026
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between MDT and Chicago?
MDT (MDT, UTC-06:00) is 1 hour ahead of Chicago (CDT, UTC-05:00). The gap is currently +1h.
How do I convert MDT time to Chicago time?
Add +1h to MDT local time. For example, 9:00 AM in MDT is 10:00 AM in Chicago.
What time is it in Chicago right now?
Chicago uses CDT at UTC-05:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +1h offset from MDT.
What is the best time to call Chicago from MDT?
Call between 9:00 AM and 4:00 PM MDT — that maps to 10:00 AM–5:00 PM CDT and keeps both parties inside the working day.
Which is ahead, MDT or Chicago?
MDT is 1 hour ahead of Chicago. When it is 12:00 PM in MDT it is 1:00 PM in Chicago.
Do MDT and Chicago use different time zones?
MDT uses MDT at UTC-06:00, while Chicago (USA) uses CDT at UTC-05:00. The IANA identifiers are America/Denver and America/Chicago.
Does daylight saving time affect the MDT–Chicago difference?
Yes at the moment: Chicago is on daylight saving time and MDT is not, so the +1h gap shifts by an hour when exactly one of them changes clocks.
Which other cities share MDT's time zone?
MDT also covers Denver, Calgary, Edmonton, Salt Lake City, Boise.
Which countries use MDT, MDT's zone?
MDT is used in United States (Mountain), Canada (Alberta).
Is there a day difference between MDT and Chicago?
Not normally. The +1h gap only pushes the date over for late-evening times.
What is the time difference between MDT and Chicago?
Chicago is +1h from MDT.
What timezone is MDT in?
MDT operates on its local timezone.
What timezone is Chicago in?
Chicago operates on Central Time (CST/CDT), 1 hour behind New York. Home to CME and CBOE, Chicago is a global center for derivatives trading.
What are the business hours in Chicago?
Standard business hours in Chicago are 8:00 AM - 5:00 PM CST.
Which countries use MDT (Mountain Daylight Time)?
MDT is used in United States (Mountain), Canada (Alberta).
Does MDT observe daylight saving time?
Yes, MDT switches to MST during summer months.
What are some interesting facts about MDT?
MDT shares the same offset as CST (UTC-06:00). Arizona does not switch to MDT, remaining on MST.
Which cities are in the CST timezone?
Major cities in the CST timezone include Chicago, Houston, Dallas, San Antonio, Mexico City, Austin, Winnipeg, Memphis.
What is the UTC offset for CST?
Central Standard Time (CST) is at UTC-06:00. During daylight saving time, it shifts to CDT.
What should I know about the CST timezone?
CST covers 20 US states fully or partially. Chicago and Houston are the two largest cities in the Central Time Zone.
When is it midnight in MDT, what time is it in Chicago?
When it is 12:00 AM (midnight) in MDT (MDT), it is +1h later in Chicago (CST).
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