What's the current time difference between EST and MST?

Right now, MST (MST · Mountain Time) is −2h relative to EST (EST · Eastern Time). The number is live and reflects the current daylight-saving status of both zones.

Does this converter account for daylight saving time?

Yes. The math is done against IANA's tz database via Intl.DateTimeFormat, so DST shifts in either zone show up immediately at the transition. Around DST boundaries the conversion can move by an hour from one week to the next — this page always reflects the current rule.

Why does the TO column sometimes show "+1d" or "−1d"?

When the EST hour lands on a different calendar day in MST, we flag it so you don't accidentally schedule a meeting on the wrong date. EST 11 PM is often the next day in eastern-hemisphere zones, for example.

How do I schedule a meeting that works for both zones?

Look at the row highlighted lume green — that's the longest contiguous block where both EST and MST are in standard working hours (9 AM–5 PM local). Open the planner from the link above to lock a specific time and share a DST-stable link with the other party.

EST to MST

EST · Eastern Time ↔ MST · Mountain Time. Right now, MST is −2h relative to EST. DST is honored live.

From

EST

—

MST

—

00:00EST hour of day23:30

Live offset

−2h

EST (May 23) ↔ MST (May 22)

If EST or MST just shifted for daylight saving, that's already reflected.

Best meeting overlap

11:00 AM – 4:00 PM

EST time. Equivalent MST: 9:00 AM – 2:00 PM

Working hours = 9 AM – 5 PM in each zone.

Hour-by-hour

EST → MST, every hour

EST · May 23MST · May 22

12:00 AM10:00 PM
1:00 AM11:00 PM
2:00 AM+1d12:00 AM
3:00 AM+1d1:00 AM
4:00 AM+1d2:00 AM
5:00 AM+1d3:00 AM
6:00 AM+1d4:00 AM
7:00 AM+1d5:00 AM
8:00 AM+1d6:00 AM
9:00 AM+1d7:00 AM
10:00 AM+1d8:00 AM
11:00 AM+1d9:00 AM
12:00 PM+1d10:00 AM
1:00 PM+1d11:00 AM
2:00 PM+1d12:00 PM
3:00 PM+1d1:00 PM
4:00 PM+1d2:00 PM
5:00 PM+1d3:00 PM
6:00 PM+1d4:00 PM
7:00 PM+1d5:00 PM
8:00 PM+1d6:00 PM
9:00 PM+1d7:00 PM
10:00 PM+1d8:00 PM
11:00 PM+1d9:00 PM

Both zones in working hours±1d = the TO side lands on a different calendar day

FAQ

EST ↔ MST, questions answered

What's the current time difference between EST and MST?: Right now, MST (MST · Mountain Time) is −2h relative to EST (EST · Eastern Time). The number is live and reflects the current daylight-saving status of both zones.
Does this converter account for daylight saving time?: Yes. The math is done against IANA's tz database via Intl.DateTimeFormat, so DST shifts in either zone show up immediately at the transition. Around DST boundaries the conversion can move by an hour from one week to the next — this page always reflects the current rule.
Why does the TO column sometimes show "+1d" or "−1d"?: When the EST hour lands on a different calendar day in MST, we flag it so you don't accidentally schedule a meeting on the wrong date. EST 11 PM is often the next day in eastern-hemisphere zones, for example.
How do I schedule a meeting that works for both zones?: Look at the row highlighted lume green — that's the longest contiguous block where both EST and MST are in standard working hours (9 AM–5 PM local). Open the planner from the link above to lock a specific time and share a DST-stable link with the other party.

Reverse — MST to EST Open in planner