MST to EST converter
Eastern Time is 2 hours ahead of Mountain Time all year. Type any time below, or pick another place.
Mountain Time (US) to Eastern Time (US), hour by hour (Nov 13, 2026)
| Mountain Time (US) MST | Eastern Time (US) EST |
|---|---|
| 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 | 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 | 12:00 AMSat |
| 11:00 PM | 1:00 AMSat |
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
Eastern Time (US) is 2 hours ahead of Mountain Time (US) all year.
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). 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).
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
Eastern Time (US) is 2 hours ahead of Mountain Time (US) all year.
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). 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).
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 MST and EST mean here
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.
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.
This page also answers: mdt to est, mountain to eastern time.
Questions
What is the time difference between MST and EST?
Eastern Time is 2 hours ahead of Mountain Time all year.
What is 9 AM MST in EST?
9:00 AM MST is 11:00 AM EST, noon MST is 2:00 PM EST, and 5:00 PM MST is 7:00 PM EST.
When do working hours overlap?
6 hours of a 9-to-5 day overlap: 9:00 AM to 3:00 PM in Mountain Time is 11:00 AM to 5:00 PM in Eastern 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.
What about MDT to EST?
Read literally, MDT is UTC−6 and EST is UTC−5, so they are 1 hour apart. But people who search for "mdt to est" almost always mean the clocks in those places, and in practice Eastern Time is 2 hours ahead of Mountain Time all year. That real-clock answer is what the converter shows.