CST to MST Time Zone Converter
This converts US Central Time (CST, or CDT in summer — locals say CT) into US Mountain Time (MST, or MDT in summer — locals say MT). Mountain is always exactly 1 hour behind Central. Both zones share the same daylight-saving calendar, so that hour never changes, and the converter keeps it right on any date.
Enter a date and time to convert.
Daylight saving is applied automatically for the date you pick. Labels like PST/EST name the zone (Pacific/Eastern); the real abbreviation shifts to PDT/EDT during daylight saving, and gmt here means London (GMT in winter, BST in summer) while utc stays fixed.
The time difference
US Mountain Time is 1 hour behind US Central Time, every day of the year. Both zones follow the same US daylight-saving calendar — springing forward and falling back on the same dates — so the one-hour gap never drifts. To go from a Central clock to Mountain, subtract an hour.
A worked example
Take 9:00 AM Central Time.
- Winter (Jan 15, 2026): 9:00 AM CST becomes 8:00 AM MST the same day.
- Summer (Jul 15, 2026): 9:00 AM CDT becomes 8:00 AM MDT the same day.
The result is the same all year — a flat one-hour subtraction, whatever the season.
Daylight saving & the abbreviation caveat
The slug says "CST" and the target "MST," both standard-time names, but from spring to fall the zones are really on CDT and MDT (daylight time). People in Houston say "CT" and people in Denver say "MT" without dwelling on it. Both switch together on March 8 and November 1, 2026, so the gap holds steady through every changeover. The converter handles this for you, so the result is always right for your date.
When you'll use it
Handy for lining up a call between a Central-time office and a Denver or Salt Lake City team, timing a flight west, catching a Mountain-time broadcast, or coordinating remote work across the two zones.
Frequently asked questions
How many hours behind is Mountain Time than Central Time?
Exactly 1 hour, all year. Mountain Time is always one hour behind Central Time because both zones spring forward and fall back on the same dates.
Does the CST-to-MST gap change in summer?
No. Both zones switch daylight saving together, so the 1-hour difference holds every day of the year, winter and summer alike.
If it's 9:00 AM in Dallas, what time is it in Denver?
8:00 AM. Subtract one hour from any Central time to get Mountain — so 9:00 AM in Dallas is 8:00 AM in Denver.