EST to MST converter
Mountain Time is 2 hours behind Eastern Time all year. Type any time below, or pick another place.
Eastern Time (US) to Mountain Time (US), hour by hour (Nov 13, 2026)
| Eastern Time (US) EST | Mountain Time (US) MST |
|---|---|
| 12:00 AM | 10:00 PMThu |
| 1:00 AM | 11:00 PMThu |
| 2:00 AM | 12:00 AM |
| 3:00 AM | 1:00 AM |
| 4:00 AM | 2:00 AM |
| 5:00 AM | 3:00 AM |
| 6:00 AM | 4:00 AM |
| 7:00 AM | 5:00 AM |
| 8:00 AM | 6:00 AM |
| 9:00 AM | 7:00 AM |
| 10:00 AM | 8:00 AM |
| 11:00 AM | 9:00 AM |
| 12:00 PM | 10:00 AM |
| 1:00 PM | 11:00 AM |
| 2:00 PM | 12:00 PM |
| 3:00 PM | 1:00 PM |
| 4:00 PM | 2:00 PM |
| 5:00 PM | 3:00 PM |
| 6:00 PM | 4:00 PM |
| 7:00 PM | 5:00 PM |
| 8:00 PM | 6:00 PM |
| 9:00 PM | 7:00 PM |
| 10:00 PM | 8:00 PM |
| 11:00 PM | 9:00 PM |
Shaded rows: 9 AM to 5 PM in both places. A weekday is shown next to times that fall on a different day. The table follows the date picked above.
When daylight saving changes the gap
2026
Mountain Time (US) is 2 hours behind Eastern Time (US) all year.
Eastern Time (US) moves its clocks forward on March 8 (2:00 AM becomes 3:00 AM) and back on November 1 (2:00 AM becomes 1:00 AM). Mountain Time (US) moves its clocks forward on March 8 (2:00 AM becomes 3:00 AM) and back on November 1 (2:00 AM becomes 1:00 AM).
Both switch at 2:00 AM local time, which is a different moment in each zone, so for about an hour on March 8 and November 1 the gap is briefly different.
2027
Mountain Time (US) is 2 hours behind Eastern Time (US) all year.
Eastern Time (US) moves its clocks forward on March 14 (2:00 AM becomes 3:00 AM) and back on November 7 (2:00 AM becomes 1:00 AM). Mountain Time (US) moves its clocks forward on March 14 (2:00 AM becomes 3:00 AM) and back on November 7 (2:00 AM becomes 1:00 AM).
Both switch at 2:00 AM local time, which is a different moment in each zone, so for about an hour on March 14 and November 7 the gap is briefly different.
What EST and MST mean here
EST (Eastern Standard Time, UTC−5) is the winter time in New York, Washington, Atlanta, Miami and Toronto. From March 8 to November 1, 2026 those places use EDT (Eastern Daylight Time, UTC−4) instead. Most people who write "EST" mean "Eastern Time, whatever the clocks say today", so this converter follows the clocks in New York and switches between EST and EDT on the right days.
MST means US Mountain Time as kept in Denver, Salt Lake City, Albuquerque and Calgary: MST (UTC−7) in winter and MDT (UTC−6) from March 8 to November 1, 2026. Arizona is the exception: most of the state stays on MST all year, so in summer Phoenix shows the same time as Los Angeles, not Denver.
This page also answers: eastern to mountain time.
Questions
What is the time difference between EST and MST?
Mountain Time is 2 hours behind Eastern Time all year.
What is 9 AM EST in MST?
9:00 AM EST is 7:00 AM MST, noon EST is 10:00 AM MST, and 5:00 PM EST is 3:00 PM MST.
When do working hours overlap?
6 hours of a 9-to-5 day overlap: 11:00 AM to 5:00 PM in Eastern Time is 9:00 AM to 3:00 PM in Mountain Time.
What about Arizona?
Most of Arizona (including Phoenix and Tucson) uses MST all year and skips daylight saving time. In winter it matches Denver; in summer it matches Los Angeles. The Navajo Nation in Arizona does observe daylight saving time. Pick Phoenix in the converter for Arizona time.