Chicago to MDT
-1hChicago
CDTSOURCEMDT
MDTGreen rows indicate typical business hours (9 AM - 5 PM)
CDT and MDT on the World Map
The map below highlights the CDT (Central Standard Time) and MDT (Mountain Daylight Time) timezone regions across the globe.
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.
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.
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.
Everything You Need to Know About Chicago and MDT Time
Chicago runs on Central Daylight Time (CDT) at UTC-05:00, currently observing daylight saving time. MDT runs on Mountain Daylight Time (MDT) at UTC-06:00. That puts Chicago 1 hour behind MDT — a difference of -1h at the current offsets.
In practice, when it is 9:00 AM in Chicago it is 8:00 AM in MDT. Midnight in Chicago is 11:00 PM in MDT.Chicago observes daylight saving time while MDT does not, so the gap narrows or widens by an hour part of the year.
Chicago to MDT time conversion table
| Chicago (CDT) | MDT (MDT) | Day |
|---|---|---|
| 12:00 AM | 11:00 PM | previous day |
| 6:00 AM | 5:00 AM | same day |
| 7:00 AM | 6:00 AM | same day |
| 8:00 AM | 7:00 AM | same day |
| 9:00 AM | 8:00 AM | same day |
| 12:00 PM | 11:00 AM | same day |
| 3:00 PM | 2:00 PM | same day |
| 5:00 PM | 4:00 PM | same day |
| 6:00 PM | 5:00 PM | same day |
| 9:00 PM | 8:00 PM | same day |
Why people convert Chicago to MDT time
- Scheduling a call from Chicago to MDT: a 10:00 AM start in Chicago lands at 9:00 AM in MDT, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Chicago and MDT are inside the 9-to-5 working day between 10:00 AM and 5:00 PM CDT time (9:00 AM–4:00 PM MDT). That is roughly 7 hours of usable overlap.
- Keeping family and friends in sync: knowing that 8:00 PM in Chicago is 7:00 PM in MDT makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM CDT" is unambiguous; "3 PM" across a -1h gap is not.
- Block 10:00 AM–5:00 PM CDT as the recurring meeting window if you work primarily from Chicago and need MDT colleagues present.
- Chicago: Clocks fall back on Sun, Nov 1, 2026. Re-check this page after that date because the offset changes and so does the -1h gap.
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.
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.
Best time to call between Chicago and MDT
Both Chicago and MDT sit inside the 9 AM – 5 PM working day between 10:00 AM–5:00 PM CDT, which is 9:00 AM–4:00 PM MDT. That gives roughly 7 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
Chicago and MDT share 7 hours of working-hours overlap (10:00 AM–5:00 PM CDT), so scheduling a live meeting is straightforward.
Chicago is 1 hour behind MDT (CDT UTC-05:00 → MDT UTC-06:00). The shared working window is 10:00 AM–5:00 PM CDT. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
Chicago
☀ Currently in DST
Standard: UTC-06:00 · DST: UTC-05:00
Clocks fall back on Sun, Nov 1, 2026
MDT
☀ Currently in DST
Standard: UTC-07:00 · DST: UTC-06:00
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 Chicago and MDT?
Chicago (CDT, UTC-05:00) is 1 hour behind MDT (MDT, UTC-06:00). The gap is currently -1h.
How do I convert Chicago time to MDT time?
Add -1h to Chicago local time. For example, 9:00 AM in Chicago is 8:00 AM in MDT.
What time is it in MDT right now?
MDT uses MDT at UTC-06:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -1h offset from Chicago.
What is the best time to call MDT from Chicago?
Call between 10:00 AM and 5:00 PM CDT — that maps to 9:00 AM–4:00 PM MDT and keeps both parties inside the working day.
Which is behind, Chicago or MDT?
Chicago is 1 hour behind MDT. When it is 12:00 PM in Chicago it is 11:00 AM in MDT.
Do Chicago and MDT use different time zones?
Chicago (USA) uses CDT at UTC-05:00, while MDT uses MDT at UTC-06:00. The IANA identifiers are America/Chicago and America/Denver.
Does daylight saving time affect the Chicago–MDT 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 Chicago's time zone?
CDT also covers Chicago, Houston, Dallas, San Antonio, Mexico City, Austin, Winnipeg, Memphis and 6 more.
Which countries use CDT, Chicago's zone?
CDT is used in United States (Central), Canada (Manitoba, Saskatchewan), Mexico, Guatemala, Honduras, El Salvador, Costa Rica, Nicaragua and 1 more.
Is there a day difference between Chicago and MDT?
Not normally. The -1h gap only pushes the date over the previous day.
What is the time difference between Chicago and MDT?
MDT is -1h from Chicago.
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 timezone is MDT in?
MDT operates on its local timezone.
What are the business hours in Chicago?
Standard business hours in Chicago are 8:00 AM - 5:00 PM CST.
Which countries use CST (Central Standard Time)?
CST is used in United States (Central), Canada (Manitoba, Saskatchewan), Mexico, Guatemala, Honduras, El Salvador, and 3 more countries.
Does CST observe daylight saving time?
Yes, CST switches to CDT during summer months.
What are some interesting facts about CST?
CST covers 20 US states fully or partially. Chicago and Houston are the two largest cities in the Central Time Zone.
Which cities are in the MDT timezone?
Major cities in the MDT timezone include Denver, Calgary, Edmonton, Salt Lake City, Boise.
What is the UTC offset for MDT?
Mountain Daylight Time (MDT) is at UTC-06:00. During daylight saving time, it shifts to MST.
What should I know about the MDT timezone?
MDT shares the same offset as CST (UTC-06:00). Arizona does not switch to MDT, remaining on MST.
When is it midnight in Chicago, what time is it in MDT?
When it is 12:00 AM (midnight) in Chicago (CST), it is -1h later in MDT (MDT).
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