Chicago to MST Time Converter
Mountain Time is on daylight saving time: MDT (UTC−6) until Sun, Nov 1.
Arizona stays on MST (UTC−7).
Start by searching for a time zone, city, or town.
Add one or more places to compare local times, adjust the date, and share the result.
Quick answers
Selected conversion
7:00 am07:00 CDT (UTC-5), Oct 18, 2026 = 6:00 am06:00 MDT (UTC-6), Oct 18, 2026
Chicago is 1 hour ahead of MDT.
How the time difference changes
For most of the year, Chicago is 1 hour ahead of MDT. From Nov 1, 2026 to Mar 14, 2027, Chicago is 1 hour ahead of MST. Briefly around clock changes, Chicago is 2 hours ahead of MST or Chicago and MDT have the same time.
For most of the year, working hours of 9:00 am to 6:00 pm in Chicago correspond to 8:00 am to 5:00 pm in MDT. At other times of the year, working hours of 9:00 am to 6:00 pm in Chicago correspond to 8:00 am to 5:00 pm in MST.For most of the year, working hours of 09:00 to 18:00 in Chicago correspond to 08:00 to 17:00 in MDT. At other times of the year, working hours of 09:00 to 18:00 in Chicago correspond to 08:00 to 17:00 in MST.
Compare Chicago time with MST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
CDT (Central Daylight Time) is 1 hour ahead of Mountain Daylight Time.
7:00 am07:00 in Chicago, IL, USA is 6:00 am06:00 in MDT
Chicago to MDT call time
Best time for a conference call or a meeting is between 10am-6pm10:00-18:00 in Chicago which corresponds to 9am-5pm09:00-17:00 in MDT
7:00 am07:00 CDT (Central Daylight Time) (Chicago, IL, USA). Offset UTC -5:00 hours
6:00 am06:00 Mountain Daylight Time (MDT). Offset UTC -6:00 hours
7:00 am07:00 Chicago, IL, USA / 6:00 am06:00 MDT
Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.
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Chicago Time Zone and Facts
Time Zone
CST – Central Standard Time, UTC-6 (standard time)
Chicago Facts
Mountain Standard Time
Offset: MST is 7 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: Canada, Mexico, United States
Principal Cities: The largest city in the MST time zone is Phoenix in the United States, with about 1.65 million people. Other major cities in this time zone include Ciudad Juárez, Hermosillo, Culiacán, Denver.
French: HNR - Heure Normale des Rocheuses
Spanish: MT - Zona Pacífico
Today the lighter areas are on UTC−6 (MDT).
Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Mountain Daylight Time (MDT).
End: Mountain Standard Time (MST) ended on Sunday, March 8, 2026 at 2:00 am02:00 local time and clocks were set one hour forward to Sunday, March 8, 2026, 3:00 am03:00 local daylight time instead. Standard time ends annually on the second Sunday of March.
Start: Mountain Standard Time (MST) starts on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks are set one hour back to Sunday, November 1, 2026, 1:00 am01:00. Standard time starts annually on the first Sunday of November.
See USA daylight saving time and upcoming clock changes worldwide.
MST representations, usage and related time zones
- -07 - basic short
- -0700 - basic
- -07:00 - extended
- -0700 - sign character (-) followed by a four digit time providing hours (07) and minutes (00) of the offset. Indicates an offset of seven hours to the west of the zero meridian.
- Tango - Military abbreviation for MST
- T - short form of 'Tango'
- America/Boise
- America/Cambridge_Bay
- America/Ciudad_Juarez
- America/Creston
- America/Dawson
- America/Dawson_Creek
- America/Denver
- America/Edmonton
- America/Fort_Nelson
- America/Hermosillo
- America/Inuvik
- America/Mazatlan
- America/Phoenix
- America/Shiprock
- America/Whitehorse
- America/Yellowknife
- Canada/Mountain
- Canada/Yukon
- MST
- MST7MDT
- Mexico/BajaSur
- Navajo
- US/Arizona
- US/Mountain
- MST - Mountain Standard Time
- PDT - Pacific Daylight Time
- YST - Yukon Standard Time
- T - Tango Time Zone