MST to Chicago
+2hMST
MSTSOURCEChicago
CDTGreen rows indicate typical business hours (9 AM - 5 PM)
MST and CDT on the World Map
The map below highlights the MST (Mountain Standard Time) and CDT (Central Standard Time) timezone regions across the globe.
MST – Mountain Standard Time
UTC-07:00Mountain Standard Time (MST) is the time zone for the Mountain region of North America, 7 hours behind UTC.
- •Arizona does not observe daylight saving time, staying on MST year-round.
- •The Navajo Nation in Arizona does observe DST, unlike the rest of the state.
- •Denver, the 'Mile High City', is the largest city fully in MST.
- •MST covers 6 US states entirely and parts of several others.
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.
Understanding the +2h Gap: MST vs Chicago
MST runs on Mountain Standard Time (MST) at UTC-07:00. Chicago runs on Central Daylight Time (CDT) at UTC-05:00, also currently on daylight saving time. That puts MST 2 hours ahead of Chicago — a difference of +2h at the current offsets.
In practice, when it is 9:00 AM in MST it is 11:00 AM in Chicago. Midnight in MST is 2:00 AM in Chicago.Chicago observes daylight saving time while MST does not, so the gap narrows or widens by an hour part of the year.
MST to Chicago time conversion table
| MST (MST) | Chicago (CDT) | Day |
|---|---|---|
| 12:00 AM | 2:00 AM | same day |
| 6:00 AM | 8:00 AM | same day |
| 7:00 AM | 9:00 AM | same day |
| 8:00 AM | 10:00 AM | same day |
| 9:00 AM | 11:00 AM | same day |
| 12:00 PM | 2:00 PM | same day |
| 3:00 PM | 5:00 PM | same day |
| 5:00 PM | 7:00 PM | same day |
| 6:00 PM | 8:00 PM | same day |
| 9:00 PM | 11:00 PM | same day |
Why people convert MST to Chicago time
- Scheduling a call from MST to Chicago: a 10:00 AM start in MST lands at 12:00 PM in Chicago, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both MST and Chicago are inside the 9-to-5 working day between 9:00 AM and 3:00 PM MST time (11:00 AM–5:00 PM CDT). That is roughly 6 hours of usable overlap.
- Watching a live event or market open: MST viewers need 11:00 AM in Chicago to catch a 9:00 AM start there, and 10:00 PM if the event is anchored to MST.
- Always state the zone abbreviation, not just the hour. "3:00 PM MST" is unambiguous; "3 PM" across a +2h gap is not.
- Block 9:00 AM–3:00 PM MST as the recurring meeting window if you work primarily from MST 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 MST (Mountain Standard Time)
Mountain Standard Time (MST) covers the Rocky Mountain region of the United States and Canada. Arizona is notable for not observing daylight saving time, staying on MST year-round (except the Navajo Nation). The time zone includes major cities like Denver, Phoenix, Calgary, and Salt Lake City. During summer, most areas switch to Mountain Daylight Time (MDT, 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 MST and Chicago
Both MST and Chicago sit inside the 9 AM – 5 PM working day between 9:00 AM–3:00 PM MST, which is 11:00 AM–5:00 PM CDT. That gives roughly 6 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
MST and Chicago share 6 hours of working-hours overlap (9:00 AM–3:00 PM MST), so scheduling a live meeting is straightforward.
MST is 2 hours ahead of Chicago (MST UTC-07:00 → CDT UTC-05:00). The shared working window is 9:00 AM–3:00 PM MST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
MST
☀ 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 MST and Chicago?
MST (MST, UTC-07:00) is 2 hours ahead of Chicago (CDT, UTC-05:00). The gap is currently +2h.
How do I convert MST time to Chicago time?
Add +2h to MST local time. For example, 9:00 AM in MST is 11:00 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 +2h offset from MST.
What is the best time to call Chicago from MST?
Call between 9:00 AM and 3:00 PM MST — that maps to 11:00 AM–5:00 PM CDT and keeps both parties inside the working day.
Which is ahead, MST or Chicago?
MST is 2 hours ahead of Chicago. When it is 12:00 PM in MST it is 2:00 PM in Chicago.
Do MST and Chicago use different time zones?
MST uses MST at UTC-07:00, while Chicago (USA) uses CDT at UTC-05:00. The IANA identifiers are America/Denver and America/Chicago.
Does daylight saving time affect the MST–Chicago difference?
Yes at the moment: Chicago is on daylight saving time and MST is not, so the +2h gap shifts by an hour when exactly one of them changes clocks.
Which other cities share MST's time zone?
MST also covers Denver, Phoenix, Salt Lake City, Calgary, Edmonton, Albuquerque, El Paso, Tucson and 2 more.
Which countries use MST, MST's zone?
MST is used in United States (Mountain), Canada (Alberta), Mexico (Chihuahua, Sonora).
Is there a day difference between MST and Chicago?
Not normally. The +2h gap only pushes the date over for late-evening times.
What is the time difference between MST and Chicago?
Chicago is +2h from MST.
What timezone is MST in?
MST 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 MST (Mountain Standard Time)?
MST is used in United States (Mountain), Canada (Alberta), Mexico (Chihuahua, Sonora).
Does MST observe daylight saving time?
Yes, MST switches to MDT during summer months.
What are some interesting facts about MST?
Arizona does not observe daylight saving time, staying on MST year-round. The Navajo Nation in Arizona does observe DST, unlike the rest of the state.
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 MST, what time is it in Chicago?
When it is 12:00 AM (midnight) in MST (MST), it is +2h later in Chicago (CST).
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