WhatTimeZoneIAm.com

MST to EST Converter

EST = MST + 2 hours

All year

10:00 AM MST in Denver is 12:00 PM EST. Arizona is the exception: it stays on MST in summer, when it is 3 hours behind New York.

12:00 PM MDT is

2:00 PM EDT

Thu, Oct 22 · 2 hours ahead of MT

Thu, Oct 22 · 12:00 PM MT / 2:00 PM ET

MST and EST right now

MST to EST time chart

Each hour of the day in Mountain Time and the same moment in Eastern Time. The gap is the same all year.

Working hours, 9 AM–5 PMNight, 10 PM–7 AM

Mountain TimeEastern Time2 hr ahead
12:00 AM2:00 AM
1:00 AM3:00 AM
2:00 AM4:00 AM
3:00 AM5:00 AM
4:00 AM6:00 AM
5:00 AM7:00 AM
6:00 AM8:00 AM
7:00 AM9:00 AM
8:00 AM10:00 AM
9:00 AM11:00 AM
10:00 AM12:00 PM
11:00 AM1:00 PM
Mountain TimeEastern Time2 hr ahead
12:00 PM2:00 PM
1:00 PM3:00 PM
2:00 PM4:00 PM
3:00 PM5:00 PM
4:00 PM6:00 PM
5:00 PM7:00 PM
6:00 PM8:00 PM
7:00 PM9:00 PM
8:00 PM10:00 PM
9:00 PM11:00 PM
10:00 PM12:00 AMnext day
11:00 PM1:00 AMnext day

Daylight saving time

Both zones change their clocks on the same nights, so Eastern Time stays 2 hours ahead of Mountain Time all year. Each zone changes at 2:00 a.m. its own time, so for a few hours on those nights the gap is off by one hour. The next changes:

Standard or daylight time?

Strictly, MST and EST are standard time. From the second Sunday in March to the first Sunday in November the clocks show MDT and EDT instead. Most people keep writing MST and EST all year to mean the zone, and this page does the same: times follow the clocks in Denver and New York whatever the season.

Arizona

Arizona, apart from the Navajo Nation, does not use daylight saving time. From the second Sunday in March to the first Sunday in November, Phoenix is 3 hours behind New York; the rest of the year it is 2 hours behind. So “10 AM MST” from Phoenix in July is 1:00 PM Eastern, not noon.

Right now New York is 3 hours ahead of Phoenix. More on the Arizona time zone.

Where Mountain Time is used

All of Colorado, Montana, New Mexico, Utah and Wyoming, most of Idaho, and the western parts of Kansas, Nebraska, North Dakota and South Dakota. It also covers a corner of eastern Oregon and El Paso in West Texas.

Related conversions

Sources

Last checked October 21, 2026.