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EDT to MST Time Converter

Use this EDT to MST time converter to compare US East Coast and US Mountain time instantly. MST is 3 hours behind EDT, so 9:00 AM EDT becomes 6:00 AM MST and 5:00 PM EDT becomes 2:00 PM MST. The page is useful for business-hours overlap, international calls, remote-team handoffs, webinars, and travel planning, with daylight saving adjustments handled automatically.

EDT Eastern Daylight Time
...
MST Mountain Standard Time
...
Select a time to convert

EDT to MST Quick Facts

Use this EDT to MST converter to compare US East Coast and US Mountain time, check the 3 hours gap, and confirm the right slot for calls, handoffs, and deadlines. Good overlap starts around 12:00 PM EDT / 9:00 AM MST.

Time Difference
Mountain Standard Time is 3 hours behind Eastern Daylight Time
Useful when deadlines, handoffs, or calls cross workday boundaries.
Best Call Window
Best overlap starts around 12:00 PM EDT and 9:00 AM MST.
Common Use Cases
Useful for remote teams, customer support windows, travel planning, webinars, and same-day deadline handoffs.

How to Convert EDT to MST

Converting between Eastern Daylight Time and Mountain Standard Time means accounting for a 3 hours gap — here's how to do it in under 10 seconds with no sign-up.

Enter Your EDT Time

Pick the date and time in Eastern Daylight Time (UTC -4) that you want to convert. Hit "Now" to load the current EDT time instantly, or use "+1h" to step forward and compare.

Read the MST Result

The equivalent Mountain Standard Time (UTC -7) time appears immediately. Since MST is 3 hours behind of EDT, most daytime conversions stay on the same calendar day.

Copy or Fine-Tune

Click "Copy Time" to grab the MST result for your calendar or message. Use "+1d" to check how the conversion shifts across dates — useful when Daylight Saving Time changes the gap.

Why Choose Our EDT to MST Converter

Align EDT–MST Meetings Instantly

When someone in United States suggests 12:00 PM EDT, that's 9:00 AM MST. This converter shows the overlap so both sides agree on one slot — no back-and-forth.

Spot Date-Line Shifts at a Glance

Late-night EDT times can land on a different date in MST because of the 3 hours offset. The converter labels "next day" or "previous day" next to the result so you never send a message a day early or miss a deadline.

Handles DST Transitions Automatically

Daylight Saving adjustments can widen or narrow the EDT–MST gap by an hour. During transition weeks many people get it wrong. This converter pulls the current UTC offsets automatically, so the result is right even on the changeover day.

Never Miss a EDT-Timed Event

Product launches, sports matches, and webinars are often announced in EDT. Convert the event time to MST so you know exactly when to tune in — with a 3 hours difference, a morning event in United States falls during work hours in United States.

EDT to MST Time Conversion Chart

Quick-reference conversion table covering every hour of the day at a glance.

Complete 24-Hour Conversion

Eastern Daylight Time to Mountain Standard Time full day schedule

12:00 AM
EDT
→
9:00 PM
MST
(previous day)
1:00 AM
EDT
→
10:00 PM
MST
(previous day)
2:00 AM
EDT
→
11:00 PM
MST
(previous day)
3:00 AM
EDT
→
12:00 AM
MST
4:00 AM
EDT
→
1:00 AM
MST
5:00 AM
EDT
→
2:00 AM
MST
6:00 AM
EDT
→
3:00 AM
MST
7:00 AM
EDT
→
4:00 AM
MST
8:00 AM
EDT
→
5:00 AM
MST
9:00 AM
EDT
→
6:00 AM
MST
10:00 AM
EDT
→
7:00 AM
MST
11:00 AM
EDT
→
8:00 AM
MST
12:00 PM
EDT
→
9:00 AM
MST
1:00 PM
EDT
→
10:00 AM
MST
2:00 PM
EDT
→
11:00 AM
MST
3:00 PM
EDT
→
12:00 PM
MST
4:00 PM
EDT
→
1:00 PM
MST
5:00 PM
EDT
→
2:00 PM
MST
6:00 PM
EDT
→
3:00 PM
MST
7:00 PM
EDT
→
4:00 PM
MST
8:00 PM
EDT
→
5:00 PM
MST
9:00 PM
EDT
→
6:00 PM
MST
10:00 PM
EDT
→
7:00 PM
MST
11:00 PM
EDT
→
8:00 PM
MST
The two zones in context

EDT vs MST — cities and working rhythm

EDT — Eastern Daylight Time
Primary cities: New York, Toronto, Miami, Atlanta (summer)

US East Coast summer offset (mid-March to early November), UTC-4. The narrower gap to Europe (only 4 h during northern-hemisphere summer) means early-morning EU meetings align with reasonable East Coast times.

MST — Mountain Standard Time
Primary cities: Denver, Phoenix (MST year-round, no DST), Calgary, Edmonton, Salt Lake City

US Mountain — Denver, Salt Lake City, most of Arizona (Arizona notably observes no DST, so it's MST year-round while its neighbours flip). Business hours 9 AM – 5 PM MT.

Time gap: MST is 3.0 hours behind EDT (standard-time offsets — daylight-saving flips shift this by an hour twice a year in most northern-hemisphere zones).

Popular EDT Time Converters

Explore more EDT conversions for major business and travel corridors. Each page includes a 24-hour chart, time difference summary, and meeting overlap guidance.

Convert Other Time Zones to MST

Find the time difference from any major zone into Mountain Standard Time. Use these pages when scheduling with United States from a different region.

🇺🇸 Swap direction — MST to EDT Converter