Mountain Daylight Time
MDT means UTC−06:00 throughout the year. Mountain Time follows regional clock rules and uses UTC−07:00 on your selected date.
Use MT for local civil time →TIME ZONE CONVERTER
MDT to MST
Time Converter
Convert Mountain Daylight Time to Mountain Standard Time. Compare dates, seasonal differences and meeting hours.
MDT is 1h ahead of MST in 2026.
9 AM MDT = 8 AM MST
Selected date: November 10, 2026. Fixed abbreviations retain their stated UTC offsets.
THE QUICK REFERENCE
CSVMDT to MST conversion table
November 10, 2026 · Date changes are marked.
View the full 24-hour table
| MDT | MST |
|---|---|
| 12:00 AM | 11:00 PM -1 day |
| 1:00 AM | 12:00 AM |
| 2:00 AM | 1:00 AM |
| 3:00 AM | 2:00 AM |
| 4:00 AM | 3:00 AM |
| 5:00 AM | 4:00 AM |
| 6:00 AM | 5:00 AM |
| 7:00 AM | 6:00 AM |
| 8:00 AM | 7:00 AM |
| 9:00 AM | 8:00 AM |
| 10:00 AM | 9:00 AM |
| 11:00 AM | 10:00 AM |
| MDT | MST |
|---|---|
| 12:00 PM | 11:00 AM |
| 1:00 PM | 12:00 PM |
| 2:00 PM | 1:00 PM |
| 3:00 PM | 2:00 PM |
| 4:00 PM | 3:00 PM |
| 5:00 PM | 4:00 PM |
| 6:00 PM | 5:00 PM |
| 7:00 PM | 6:00 PM |
| 8:00 PM | 7:00 PM |
| 9:00 PM | 8:00 PM |
| 10:00 PM | 9:00 PM |
| 11:00 PM | 10:00 PM |
Starting with the MST working day
These examples start on 2026-11-10 in MST.
09:00 MST10:00 →MDT · 2026-11-10
17:00 MST18:00 →MDT · 2026-11-10
Which time-zone meaning are we using?
Mountain Standard Time
MST means UTC−07:00 throughout the year. Mountain Time follows regional clock rules and uses UTC−07:00 on your selected date.
Use MT for local civil time →ONE CLOCK TIME. THE WHOLE YEAR.
Year CSV09:00 MDT to MST throughout 2026
09:00 in MDT converts to 08:00 in MST on every date in 2026. The destination has the same calendar date.
Every calendar date is included, not just workdays. Date ranges include both endpoints. Based on IANA 2026e; future rules may change.
DON’T LOSE A DAY
When does MDT time become a different date in MST?
Your complete source day: 2026-11-10. Each range shows which destination date to use.
MDT · 2026-11-1000:00–01:00UTC−06:00
MST · 2026-11-0923:00–24:00UTC−07:00 Previous day
MDT · 2026-11-1001:00–24:00UTC−06:00
MST · 2026-11-1000:00–23:00UTC−07:00 Same date
Range starts are included; ends are excluded. 24:00 means midnight at the end of that date. Repeated hours appear separately with their UTC offsets. The strip is proportional to elapsed time.
THE BIGGER PICTURE
2026Some things stay in sync.
The difference between MDT and MST stays the same throughout 2026.
JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC
−1h
Neither selected clock changes its UTC offset during 2026.
CLOCK CHANGES
No upcoming clock adjustment
Both selected labels are fixed offsets, so seasonal clock changes do not alter this conversion.
PLAN BEYOND A SINGLE DAY
Daily CSVMDT–MST working hours through 2026
Every date calculated with your working windows. 261 selected MDT workdays; public holidays are not applied.
Least shared time7h
Most common7h
Most shared time7h
Days without a 60-min slot0 / 261
A start time that survives the whole year.
Start a 60-minute meeting in MDT 10:00–16:00.
These starts fit both working windows on every selected MDT workday in 2026, using a 15-minute start grid. The end of each range is the last valid start.
MDT: 09:00–17:00, Mon, Tue, Wed, Thu, Fri. MST: 09:00–17:00, Mon, Tue, Wed, Thu, Fri.
Calculation details and repeated hours
Overnight shifts belong to their start weekday. Host workday means the source calendar date. Repeated local times use the first occurrence.
THE DETAILS THAT MATTER
MDT to MST: useful answers
Is MDT / MST the same as local city time?
MDT is fixed at UTC−06:00; MST is fixed at UTC−07:00. Denver (MT) to Denver (MT) uses regional rules instead. On 2026-11-10, 09:00 at the source becomes 09:00 at the destination (MST). Choose the local-city option above when that is the clock you mean.
Which cities match MDT throughout 2026?
Mexico City, Mexico; Guatemala City, Guatemala; Managua, Nicaragua; Tegucigalpa, Honduras keep the same UTC−06:00 offset as fixed MDT throughout 2026 under the published rules. Matching an offset does not mean every place uses the abbreviation MDT.
Which cities match MST throughout 2026?
Phoenix, United States keep the same UTC−07:00 offset as fixed MST throughout 2026 under the published rules. Matching an offset does not mean every place uses the abbreviation MST.
Does the MDT–MST time difference change in 2026?
The difference stays constant throughout 2026: MST is 1h behind compared with MDT.
Does this conversion change the calendar date?
09:00 in MDT on 2026-11-10 is 08:00 in MST on 2026-11-10. This selected time stays on the same date in both places. Other times can cross midnight.
Can MDT and MST meet during working hours?
Your selected working windows share 7h on 2026-11-10. The planner above checks the whole meeting duration and shows suitable start times. Edit the windows to match your team.
Related time-zone meanings and conversions
Calculated with IANA 2026e. Working hours are your preferences; public holidays and calendar availability are not included. Our methodology