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MST to EST Converter

Eastern Time is 2 hours ahead of Mountain Time — or 3 hours ahead of Arizona in summer.

Mountain TimeDenver

--:--

 

MST
—difference

Eastern TimeNew York

--:--

 

EST

Most of Arizona stays on MST (UTC−7) all year. Denver and the rest of the Mountain zone switch to MDT in summer. Choose the one you need.

Convert MT to ET

— Eastern Time

MST to EST conversion table

Formula: Eastern Time = Mountain Time + 2 hours.

MTET from Denver (all year) or Arizona (winter)ET from Arizona, summer (MST → EDT)
12:00 AM2:00 AM3:00 AM
1:00 AM3:00 AM4:00 AM
2:00 AM4:00 AM5:00 AM
3:00 AM5:00 AM6:00 AM
4:00 AM6:00 AM7:00 AM
5:00 AM7:00 AM8:00 AM
6:00 AM8:00 AM9:00 AM
7:00 AM9:00 AM10:00 AM
8:00 AM10:00 AM11:00 AM
9:00 AM11:00 AM12:00 PM
10:00 AM12:00 PM1:00 PM
11:00 AM1:00 PM2:00 PM
12:00 PM2:00 PM3:00 PM
1:00 PM3:00 PM4:00 PM
2:00 PM4:00 PM5:00 PM
3:00 PM5:00 PM6:00 PM
4:00 PM6:00 PM7:00 PM
5:00 PM7:00 PM8:00 PM
6:00 PM8:00 PM9:00 PM
7:00 PM9:00 PM10:00 PM
8:00 PM10:00 PM11:00 PM
9:00 PM11:00 PM12:00 AM next day
10:00 PM12:00 AM next day1:00 AM next day
11:00 PM1:00 AM next day2:00 AM next day

Best meeting times

Working hours that overlap between Denver and New York:

  • 9-to-5 overlap: 9:00 AM–3:00 PM MT = 11:00 AM–5:00 PM ET.

Frequently asked questions

Does Arizona observe daylight saving time?

Most of Arizona does not, so it stays on MST all year. The Navajo Nation in northeastern Arizona does observe daylight saving time.

What is 9 AM MST in EST?

9:00 AM Mountain is 11:00 AM Eastern. From March to November, 9:00 AM in Arizona is 12:00 PM Eastern.

Is MST the same as Mountain Time?

MST is the standard-time half of Mountain Time. Places that observe daylight saving use MDT (UTC−6) in summer; Arizona keeps MST (UTC−7).

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