MST to EST Converter

Mountain Standard Time → Eastern Standard Time · MST is 2 hours behind EST

MST
—
EST
—

MST and EST are the same time

MST to EST Conversion Table

MSTEST
12:00 AM12:00 AM
1:00 AM1:00 AM
2:00 AM2:00 AM
3:00 AM3:00 AM
4:00 AM4:00 AM
5:00 AM5:00 AM
6:00 AM6:00 AM
7:00 AM7:00 AM
8:00 AM8:00 AM
9:00 AM9:00 AM
10:00 AM10:00 AM
11:00 AM11:00 AM
12:00 PM12:00 PM
1:00 PM1:00 PM
2:00 PM2:00 PM
3:00 PM3:00 PM
4:00 PM4:00 PM
5:00 PM5:00 PM
6:00 PM6:00 PM
7:00 PM7:00 PM
8:00 PM8:00 PM
9:00 PM9:00 PM
10:00 PM10:00 PM
11:00 PM11:00 PM

Green rows = business hours overlap (9:00 AM – 6:00 PM MST)

Major MST Cities
  • Denver, CO
  • Salt Lake City, UT
  • Albuquerque, NM
  • Tucson, AZ
  • Boise, ID
  • El Paso, TX
Major EST Cities
  • New York, NY
  • Miami, FL
  • Boston, MA
  • Atlanta, GA
  • Washington D.C.
  • Philadelphia, PA
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MST vs EST — What You Need to Know

Mountain Standard Time (MST) is UTC-7. It covers the Rocky Mountain states: Colorado, Utah, Montana, Wyoming, New Mexico, and Idaho. During Daylight Saving Time, MST becomes MDT (UTC-6).

Eastern Standard Time (EST) is UTC-5. It covers the US East Coast: New York, Florida, Georgia, and the Atlantic seaboard. During summer it becomes EDT (UTC-4).

The difference is always 2 hours. A 9 AM ET meeting is 7 AM MT — an early but manageable start for Mountain Time attendees.

Frequently Asked Questions

How many hours is MST behind EST?

MST (Mountain Standard Time, UTC-7) is 2 hours behind EST (Eastern Standard Time, UTC-5). This difference stays at exactly 2 hours year-round because both zones observe Daylight Saving Time on the same dates, shifting to MDT (UTC-6) and EDT (UTC-4) simultaneously.

When it is 9:00 AM MST, what time is it EST?

When it is 9:00 AM MST, it is 11:00 AM EST. MST is always 2 hours behind EST.

Does Arizona use MST or EST?

Arizona uses MST (UTC-7) year-round and does NOT observe Daylight Saving Time (except the Navajo Nation). This means in summer, when neighboring states switch to MDT (UTC-6), Arizona stays at UTC-7 — making it effectively on Pacific Daylight Time (PDT) during summer.

What states are in Mountain Time?

Mountain Time covers: Colorado, Montana, Wyoming, New Mexico, most of Idaho, Utah, Arizona (except Navajo Nation), and parts of the Dakotas, Kansas, and Nebraska.