How to convert Eastern Time to Mountain Time
- Type the Eastern time and pick the date.
- From is Eastern Time (New York, Toronto) and To is Mountain Time (Denver). For Phoenix and most of Arizona, choose Arizona (Phoenix, no DST) in To instead.
- Read the Mountain time. Before 2 am Eastern, it’s still the previous evening in Denver.
Eastern to Mountain time table
Every 3 hours. Denver is 2 hours behind on every date. Phoenix is 3 hours behind on July 15, 2026 and 2 hours on January 15, 2026.
| New York | Denver | Phoenix on July 15 | Phoenix on January 15 |
|---|---|---|---|
| 12:00 am | 10:00 pm (previous day) | 9:00 pm (previous day) | 10:00 pm (previous day) |
| 3:00 am | 1:00 am | 12:00 am | 1:00 am |
| 6:00 am | 4:00 am | 3:00 am | 4:00 am |
| 9:00 am | 7:00 am | 6:00 am | 7:00 am |
| 12:00 pm | 10:00 am | 9:00 am | 10:00 am |
| 3:00 pm | 1:00 pm | 12:00 pm | 1:00 pm |
| 6:00 pm | 4:00 pm | 3:00 pm | 4:00 pm |
| 9:00 pm | 7:00 pm | 6:00 pm | 7:00 pm |
MST, MDT and MT
MST is Mountain Standard Time, UTC−7, and MDT is Mountain Daylight Time, UTC−6. Invites often say MST all year even in summer, when Denver is really on MDT; the clock in Denver is what counts, and this page follows it for the date you pick. Arizona is the best-known place where MST in July is literally true, which is why the Phoenix columns differ.
TV schedules
National broadcasts that start at the same moment across the country are 2 hours earlier in Denver: an 8 pm Eastern start is 6 pm Mountain. Regular shows don’t always follow that rule, since networks set their own schedules by region, so check the local listing for those.