Currently on MDT (UTC−6). Next clock change: Sunday 1 November 2026 at 02:00, when clocks go back to MST (UTC−7).
MST, Mountain Standard Time, is UTC−7. MDT, Mountain Daylight Time, is UTC−6 and is used from the second Sunday of March to the first Sunday of November where clocks change. The clock above shows Denver's actual time and today's label.
MST or MDT? Dates for 2026 to 2028
- Sunday 8 March 2026: at 02:00 clocks go forward to 03:00. MST (UTC−7) becomes MDT (UTC−6), and the hour in between is skipped.
- Sunday 1 November 2026: at 02:00 clocks go back to 01:00. MDT (UTC−6) becomes MST (UTC−7), and the hour from 01:00 happens twice.
- Sunday 14 March 2027: at 02:00 clocks go forward to 03:00. MST (UTC−7) becomes MDT (UTC−6), and the hour in between is skipped.
- Sunday 7 November 2027: at 02:00 clocks go back to 01:00. MDT (UTC−6) becomes MST (UTC−7), and the hour from 01:00 happens twice.
- Sunday 12 March 2028: at 02:00 clocks go forward to 03:00. MST (UTC−7) becomes MDT (UTC−6), and the hour in between is skipped.
- Sunday 5 November 2028: at 02:00 clocks go back to 01:00. MDT (UTC−6) becomes MST (UTC−7), and the hour from 01:00 happens twice.
Where Mountain Time is used
In the US: Colorado, Utah, New Mexico, Wyoming, Montana, most of Idaho, and parts of Kansas, Nebraska, the Dakotas, Oregon and Texas (around El Paso). These all switch between MST and MDT.
Arizona stays on MST all year, apart from the Navajo Nation, which observes daylight saving time. In summer, Phoenix shows the same time as Los Angeles. In winter it matches Denver.
2026 changes in Canada
Canada's Mountain Time picture changed in 2026. Alberta moved to permanent UTC−6 (in force 18 June 2026), so from November 2026 it is an hour ahead of Denver and the time zone database labels it CST. British Columbia moved to permanent UTC−7 on 9 March 2026, and the database labels it MST from November 2026. Yukon has used UTC−7 all year since 2020. The Northwest Territories was expected to follow Alberta, but this was not yet official in the database release used here, so check before relying on it.
Related: current time in Denver · current time in Phoenix · current time in Calgary