MeetingTimePro

EST to MST converter

Eastern Time to Mountain Time. MST is 2 h behind of EST all year.

From

EST · New York EDT · UTC−4

  • MST · DenverMDT · UTC−6 · 2 h behind
    07:00Mon, Sep 28
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The gap between EST and MST

2026EST clocksMST clocksDifference
JanuaryEST UTC−5MST UTC−72 h behind
JulyEDT UTC−4MDT UTC−62 h behind

Neither clock changes relative to the other, so this gap holds all year.

Convert the other way: MST to EST · Plan a meeting across more places

EST to MST time table

Every hour of the EST day and the matching MST time, for a mid-January and a mid-July date (they are identical, since the gap never changes).

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

About these two clocks

EST — Eastern Time. Used in New York, Toronto, Miami, Atlanta. Strictly, EST is the winter name; from March to November the same clocks show EDT (UTC−4). This page follows the clocks, so summer dates use EDT.

MST — Mountain Time. Used in Denver, Salt Lake City, Calgary. MST is the winter name; summer is MDT (UTC−6). Arizona stays on MST all year, so Phoenix differs from Denver in summer.

All figures on this page come from the IANA time zone database (the same data your phone and laptop use), evaluated for the date in question. Abbreviations are ambiguous — “IST” also means Irish or Israel Standard Time, and “CST” is China Standard Time in Asia — so this page uses America/New_York and America/Denver explicitly.

Questions people ask

How many hours ahead or behind is MST compared with EST?

MST is 2 h behind of EST all year, because the offset between the two clocks does not change.

What is 9 am EST in MST?

On a January date, 9:00 am EST is 7:00 AM MST. Use the converter above for any other date.

Which cities use EST?

Eastern Time (EST) is used in New York, Toronto, Miami, Atlanta. Strictly, EST is the winter name; from March to November the same clocks show EDT (UTC−4). This page follows the clocks, so summer dates use EDT.

Which cities use MST?

Mountain Time (MST) is used in Denver, Salt Lake City, Calgary. MST is the winter name; summer is MDT (UTC−6). Arizona stays on MST all year, so Phoenix differs from Denver in summer.

When is a good time for a EST–MST call?

Look for the hours where both columns in the table fall between about 8 am and 6 pm. If none exist, the meeting planner on our home page shows the least-bad options and lets you share a link that converts for every attendee.

Related conversions

EST to ISTEST to CSTEST to PSTEST to UTCEST to GMTEST to CETEST to BSTEST to AESTEST to JST