EST to MST time difference
Right now US Mountain Time is 2 hours behind US Eastern Time: when it is 9:00 AM in US Eastern Time (EDT), it is 7:00 AM in US Mountain Time (MDT). Both places change their clocks on the same nights, so the difference stays the same all year.
ET, EST and EDT; MT, MST and MDT
ET means Eastern Time, whatever the season. It is EST (Eastern Standard Time, UTC-5) from early November to mid-March and EDT (Eastern Daylight Time, UTC-4) the rest of the year. Today it is EDT. MT means Mountain Time, whatever the season. It is MST (Mountain Standard Time, UTC-7) from early November to mid-March and MDT (Mountain Daylight Time, UTC-6) the rest of the year. Today it is MDT. Most of Arizona stays on MST all year, so in summer Arizona has the same clock time as Pacific Time; this page follows Denver, which changes the clocks. Because all of these zones change their clocks on the same nights, the gap between ET and MT stays 2 hours all year. People often write "EST" all year when they mean Eastern Time; the times on this page are correct either way.
EST to MST conversion table
Every hour of the day in US Eastern Time and the matching time in US Mountain Time, for today, October 13, 2026.
| EST (US Eastern Time) | MST (US Mountain Time) |
|---|---|
| 12:00 AM | 10:00 PM (previous day) |
| 1:00 AM | 11:00 PM (previous day) |
| 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 |
Scheduling tips
The gap is small, so normal working hours mostly overlap. When you share a time, write the zone with it, such as "9:00 AM EST", and remember that a time near midnight can fall on a different date on the other side.
Reverse: MST to EST. Other converters: EST to PKT · EST to PST · EST to CST · EST to GMT · EST to IST · CST to MST · any time zone to your time
Frequently asked questions
What is the time difference between EST and MST?
Right now US Mountain Time is 2 hours behind US Eastern Time.
What time is it in US Mountain Time when it is 9 AM in US Eastern Time?
7:00 AM.
What is 8 PM EST in MST?
6:00 PM MDT.
Does the EST to MST difference change during the year?
No. Both places switch to and from daylight saving time on the same nights, so the gap stays the same all year.
How do I convert EST to MST?
Enter the EST time and date at the top. The converter applies the difference for that date, including daylight saving time.
What is 12 PM EST in MST?
10:00 AM today.
What is 6 PM EST in MST?
4:00 PM today.
What is the best time for a call between US Eastern Time and US Mountain Time?
Pick a time that is in working hours in both places; the hour-by-hour table on this page shows both clocks side by side.