Time-zone abbreviation
MDT time now
MDT has several regional meanings. Compare the current time, UTC offset and IANA rule set before scheduling.
Mountain Daylight Time
Wednesday, September 16, 2026
MDT is ambiguous. It has 2 represented meanings on this page. Use a city or IANA identifier for conversion.
Regional definitions
What MDT can mean
Current abbreviations and offsets are calculated for this instant. A regional zone may be in a different seasonal phase today.
Mountain Daylight Time
North America5:34 AM
Wednesday, September 16, 2026
Mountain Time
North America5:34 AM
Wednesday, September 16, 2026
| Meaning | Current abbreviation | UTC offset | Rule set | Notes |
|---|---|---|---|---|
| Mountain Daylight Time North America | Mountain Daylight Time | UTC-06:00 | Fixed offset | The UTC-06:00 daylight-time phase of Mountain Time. |
| Mountain Time North America | MDT | UTC-06:00 | America/Denver | A regional zone that uses MDT during its daylight-saving period. |
DST-aware conversion
Time zone converter
Convert historical, current or future wall times between cities, IANA zones and UTC offsets.
Clear answers
MDT time-zone questions
What does MDT mean?
On this page MDT can refer to Mountain Daylight Time, Mountain Time. The intended meaning depends on the region and date.
Is MDT a unique time zone?
No.
Can the UTC offset for MDT change?
A fixed abbreviation entry has a fixed offset, but a geographic regional time zone can switch abbreviations or offsets under daylight-saving rules.
What should I enter in the time converter?
Use a city or an IANA time-zone identifier when an abbreviation is ambiguous. This avoids silently choosing the wrong region.
