MST to EST converter

MST to EST quick reference

MST or MDT, EST or EDT? Daylight saving explained

MST (UTC−7) is the winter name and MDT (UTC−6) the summer name. This page uses Denver time, which changes its clocks. Most of Arizona (Phoenix) stays on MST all year, so in summer Phoenix is an hour behind Denver.

EST (UTC−5) is the winter name and EDT (UTC−4) the summer name. Most people write “EST” all year and mean whatever the clocks say in New York, so MeetETA reads EST as local Eastern time on the date you pick, and says so when that date is on EDT.

Right now Denver is on MDT, UTC−6 and New York is on EDT, UTC−4 (the clocks at the top of the page always show the live values).

How the gap changes during the year

New York is 2 hours ahead of Denver all year.

Working-day overlap, hour by hour

Each row is an hour in Denver. Green means that side is inside a 9–5 working day. There is 6 h of shared 9–5 time; the easiest window is 7 AM–8 PM MST (9 AM–10 PM EST).

Shows Denver 5 AM to 10 PM. Times on the New York side may fall on the next day.

Example conversions

Questions people ask

What is the time difference between MST and EST?

New York is 2 h ahead of Denver all year. Right now it is 2 h.

Does the MST to EST difference change with daylight saving?

Both sides use daylight saving, so the gap only changes when they switch on different dates.

How do I convert 3 PM MST to EST?

3 PM MST is 5 PM EST. Or just type “3 PM MST” in the converter at the top of this page.

When can US Mountain time and the US East Coast meet during work hours?

There is 6 h of shared 9–5 time; the most comfortable window is 7 AM–8 PM MST (9 AM–10 PM EST).

What time is 9 PM EST in MST?

9 PM EST is 7 PM MST. For other times, type something like “9 PM EST” in the converter.

Should I write MST or MDT?

MST (UTC−7) is the winter name and MDT (UTC−6) the summer name. This page uses Denver time, which changes its clocks. Most of Arizona (Phoenix) stays on MST all year, so in summer Phoenix is an hour behind Denver.

Should I write EST or EDT?

EST (UTC−5) is the winter name and EDT (UTC−4) the summer name. Most people write “EST” all year and mean whatever the clocks say in New York, so MeetETA reads EST as local Eastern time on the date you pick, and says so when that date is on EDT.

Is MeetETA free?

Yes. MeetETA is free, shows no ads and needs no account. Your cities and settings stay in your browser, and where consent is required, analytics only load after you accept cookies.