timeinusa.net

MST to EST — Mountain to Eastern Time

Eastern Time is 2 hours ahead of Mountain Time, from January through December.

The conversion rule

Add 2 hours to Mountain Time to get Eastern Time. 12:00 PM MST is 2:00 PM EST. Denver and New York flip to daylight saving together, so the 2-hour spread never varies.

The two zones share 9:00 AM–3:00 PM MT / 11:00 AM–5:00 PM ET. Early Mountain mornings work well for the East; anything after 3:00 PM in Denver is after hours in New York.

Phoenix runs its own schedule: Arizona ignores DST, so in summer it sits 3 hours behind New York and its clocks agree with Los Angeles.

MST to EST conversion chart

Mountain (MST/MDT)Eastern (EST/EDT)
12:00 AM (midnight)2:00 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 (noon)
11:00 AM1:00 PM
12:00 PM (noon)2:00 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 AM (midnight, next day)
11:00 PM1:00 AM (next day)

Reverse direction: EST to MST (subtract 2 hours). Related: MST to CST, MST to PST, MST to AKST.

Frequently asked questions

How far ahead is New York from Denver?

2 hours, all year. Both cities change clocks on the same March and November Sundays, so noon in Denver is always 2:00 PM in New York.

What is 9:00 AM MST in EST?

11:00 AM EST — a start-of-day Denver call reaches the East Coast before lunch.

Is Phoenix also 2 hours behind Eastern?

Only in winter. Arizona stays on MST year-round, so from March to November Phoenix is 3 hours behind Eastern Time, matching Pacific Daylight Time.