MST to CST Converter & Meeting Planner
Quick answer: 9:00 AM MST = 10:00 AM CST (fixed -07:00 standard offset — not DST-adjusted). Use the interactive converter below for DST-aware local-time scheduling.
Planning a call or meeting between Mountain Standard Time (MST) and Central Standard Time (CST)? You need to account for the standard time difference. Central Standard Time is normally 1 hours ahead of Mountain Standard Time. Whether you are coordinating between teams in Denver and Phoenix and Chicago and Dallas, our live tool has you covered. Use our interactive overlap studio below to find the perfect waking hours for both regions, taking into account any seasonal Daylight Saving Time (DST) changes.
24-Hour Conversion Table
Quick reference: 12:00 AM MST = 1:00 AM CST. The full 24-hour MST to CST table below uses fixed standard offsets for exact abbreviation searches.
Example: 3:00 PM MST = 4:00 PM CST.
| MST Time | CST Time |
|---|---|
| 12:00 AM (00:00) | 1:00 AM (01:00) |
| 1:00 AM (01:00) | 2:00 AM (02:00) |
| 2:00 AM (02:00) | 3:00 AM (03:00) |
| 3:00 AM (03:00) | 4:00 AM (04:00) |
| 4:00 AM (04:00) | 5:00 AM (05:00) |
| 5:00 AM (05:00) | 6:00 AM (06:00) |
| 6:00 AM (06:00) | 7:00 AM (07:00) |
| 7:00 AM (07:00) | 8:00 AM (08:00) |
| 8:00 AM (08:00) | 9:00 AM (09:00) |
| 9:00 AM (09:00) | 10:00 AM (10:00) |
| 10:00 AM (10:00) | 11:00 AM (11:00) |
| 11:00 AM (11:00) | 12:00 PM (12:00) |
| 12:00 PM (12:00) | 1:00 PM (13:00) |
| 1:00 PM (13:00) | 2:00 PM (14:00) |
| 2:00 PM (14:00) | 3:00 PM (15:00) |
| 3:00 PM (15:00) | 4:00 PM (16:00) |
| 4:00 PM (16:00) | 5:00 PM (17:00) |
| 5:00 PM (17:00) | 6:00 PM (18:00) |
| 6:00 PM (18:00) | 7:00 PM (19:00) |
| 7:00 PM (19:00) | 8:00 PM (20:00) |
| 8:00 PM (20:00) | 9:00 PM (21:00) |
| 9:00 PM (21:00) | 10:00 PM (22:00) |
| 10:00 PM (22:00) | 11:00 PM (23:00) |
| 11:00 PM (23:00) | 12:00 AM (00:00)+1 day |
Best time to call Chicago from Denver
For most work calls, compare the normal business day in Denver (MST) with the business day in Chicago (CST). MST commonly covers North America, while CST is mainly associated with North America, Central America.
⚠️ Note: 2026-07-05 is not a normal workday in one or both regions based on their configured calendar. The overlap below should be treated as a reference, not a guaranteed office-hours window.
✅ The most practical overlap on 2026-07-05 is usually 9:00 AM - 4:00 PM MST, which corresponds to 10:00 AM - 5:00 PM CST. This window sits inside the typical MST workday (9:00 AM - 5:00 PM) and the CST workday (9:00 AM - 5:00 PM).
- DST Safety: MST or CST may shift during Daylight Saving Time. Always confirm the converted time for your specific date.
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Frequently Asked Questions
What is the time difference between MST and CST?
During standard time, Central Standard Time is 1 hours ahead of Mountain Standard Time.
Does Arizona observe Daylight Saving Time?
Most of Arizona — including Phoenix, Tucson, and the state government — does not observe Daylight Saving Time, remaining on MST (UTC-7) year-round under a state law in effect since 1968. The significant exception is the Navajo Nation, which spans parts of northeastern Arizona, Utah, and New Mexico and does observe DST, creating one of the most complex intrastate time zone situations in the United States.
What is the difference between MST and MDT?
MST (Mountain Standard Time) is the winter offset at UTC-7:00, observed from the first Sunday in November through the second Sunday in March. MDT (Mountain Daylight Time) is the summer offset at UTC-6:00, applied when most Mountain Time regions advance their clocks by one hour during Daylight Saving Time.
Is CST the same as Central Time (CT)?
Central Time (CT) is the umbrella term for the zone, while CST and CDT refer to its two seasonal offsets. CST (UTC-6) applies during standard time from November through March, and CDT (UTC-5) applies during Daylight Saving Time from March through November.
Does Mexico City use CST?
Mexico City operates on UTC-6, the same offset as CST, but it does not observe Daylight Saving Time following Mexico's elimination of the practice under a 2022 law. This means Mexico City stays at UTC-6 year-round while US and Canadian Central Time cities shift to UTC-5 each summer.