EST is 2 hours ahead of MST all year. So 12:00 PM MDT = 2:00 PM EDT. (Mountain Time is on MDT and Eastern Time is on EDT for daylight saving time right now.)
MST to EST conversion table
| MST / MDT | EST / EDT |
|---|---|
| 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 AM +1 day |
| 11:00 PM | 1:00 AM +1 day |
MST and EST difference through 2027
The gap between the two zones on each date range, including daylight saving time changes:
| Dates | Mountain Time | Eastern Time | Difference |
|---|---|---|---|
| Sep 30, 2026 – Oct 31, 2026 | MDT (UTC−6) | EDT (UTC−4) | EST 2 hours ahead |
| Nov 1, 2026 – Mar 13, 2027 | MST (UTC−7) | EST (UTC−5) | EST 2 hours ahead |
| Mar 14, 2027 – Nov 6, 2027 | MDT (UTC−6) | EDT (UTC−4) | EST 2 hours ahead |
| Nov 7, 2027 – Dec 31, 2027 | MST (UTC−7) | EST (UTC−5) | EST 2 hours ahead |
Best time to meet or call
- Working hours (9 AM–5 PM) overlap from 9:00 AM–3:00 PM MST (11:00 AM–5:00 PM EST), about 6 hours.
About Mountain Time (MST)
Mountain Time uses MST (UTC−7) in winter and MDT (UTC−6) in summer. Most of Arizona stays on MST all year and does not change its clocks. It's used in Denver, Salt Lake City, Albuquerque, Boise, El Paso and Calgary.
About Eastern Time (EST)
The Eastern time zone uses EST (UTC−5) in winter and EDT (UTC−4) during daylight saving time, from the second Sunday in March to the first Sunday in November. It's used in New York, Washington DC, Boston, Atlanta, Miami, Detroit and Toronto.
Frequently asked questions
What time is 12 PM MST in EST?
12:00 PM MDT is 2:00 PM EDT.
How many hours ahead or behind is EST from MST?
EST is 2 hours ahead of MST, all year.
Does MST change for daylight saving time?
Yes. Mountain Time uses MST (UTC−7) in winter and MDT (UTC−6) in summer. Most of Arizona stays on MST all year and does not change its clocks.
Does EST change for daylight saving time?
Yes. The Eastern time zone uses EST (UTC−5) in winter and EDT (UTC−4) during daylight saving time, from the second Sunday in March to the first Sunday in November.
What is the best time for a call between MST and EST?
Right now, working hours overlap from 9:00 AM–3:00 PM MST (11:00 AM–5:00 PM EST), about 6 hours.
Is it MST or MDT right now?
Mountain Time uses MST in winter and MDT from the second Sunday in March to the first Sunday in November. The live clock on this page shows which one applies today.
More time zone conversions
- EST to MST (reverse)
- PST to EST
- CST to EST
- MST to PST
- MST to CST
- IST to EST
- GMT to EST
- UTC to EST
- CET to EST
- All time zones
Sources
Reviewed by Gurmej Singh, Founder, Divy Digital Hub · Last reviewed: Wednesday, September 30, 2026. All calculations run in your browser. Editorial policy.