Convert US Mountain Time to US Eastern Time. Eastern is always 2 hours ahead.
Home row (top) sets the day. DST handled automatically via Intl.
Working hours (9–17)DaytimeNightNowSelected
MST to EST — Mountain to Eastern time
US Mountain Time (MST/MDT) and US Eastern Time (EST/EDT) change for daylight saving together, so Eastern is always 2 hours ahead of Mountain — all year.
Period
Difference
All year
Eastern is 2 hours ahead of Mountain
Mountain and Eastern overlap through the workday: 9 AM Mountain is 11 AM Eastern.
Frequently asked questions
What is the time difference between MST and EST?
US Eastern Time is always 2 hours ahead of US Mountain Time. When it is 9:00 AM MST, it is 11:00 AM EST. The gap is constant because both switch to daylight saving together.
What time is 9 AM MST in EST?
9:00 AM Mountain is 11:00 AM Eastern the same day.
Does Arizona observe daylight saving?
Most of Arizona stays on MST all year and does not use daylight saving. During US summer, Arizona is effectively 3 hours behind Eastern, while the rest of the Mountain zone (on MDT) is 2 hours behind.