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Timezone Prime

MST to EST converter

Convert Mountain Time (MST/MDT) to Eastern Time (EST/EDT), with daylight saving applied for the exact date you pick.

From

Tue, Oct 27

To

Tue, Oct 27 Same day

MDT 9 to 5 EDT 9 to 5

From zone
Mountain Daylight Time
Offset and clock
UTC−6 Daylight saving time
IANA name
America/Denver
To zone
Eastern Daylight Time
Offset and clock
UTC−4 Daylight saving time
IANA name
America/New_York

EDT is 2 hours ahead of MDT.

Time difference
EDT is 2 hours ahead of MDT for most of the year (238 days in 2026). The gap is 3 hours for 0 days in 2026. The gap is 1 hour for 0 days in 2026.
Meeting window
Working days of 9 AM to 5 PM overlap from 9:00 AM to 3:00 PM MDT, which is 11:00 AM to 5:00 PM EDT while MDT and EDT apply.
Daylight saving
Both zones change their clocks, on the dates listed below, so the gap can shift during the year.

The same conversion works for every city on these clocks, such as Denver to New York, Denver to Toronto and Arizona to New York.

Where MST and EST apply

Shaded areas follow the official zone boundaries, so a country split across zones is split here too. Hover or tap a region for its local time.

  • Mountain Time
  • Eastern Time
  • Same UTC offset right now, different zone rules

Drag to pan. Ctrl and scroll, or pinch, to zoom. Boundaries: timezone-boundary-builder, © OpenStreetMap contributors

Hour by hour

Every hour of Tuesday, October 27, 2026, side by side. Days with a clock change show 23 or 25 rows.

Shaded rows fall inside working hours in both places.

Hourly comparison of the two time zones. Choose a time to load it in the converter.
Denver (MDT) New York (EDT) Working hours
12:00 AM 2:00 AM
1:00 AM 3:00 AM
2:00 AM 4:00 AM
3:00 AM 5:00 AM
4:00 AM 6:00 AM
5:00 AM 7:00 AM
6:00 AM 8:00 AM
7:00 AM 9:00 AM
8:00 AM 10:00 AM
9:00 AM 11:00 AM Both working
10:00 AM 12:00 PM Both working
11:00 AM 1:00 PM Both working
12:00 PM 2:00 PM Both working
1:00 PM 3:00 PM Both working
2:00 PM 4:00 PM Both working
3:00 PM 5:00 PM
4:00 PM 6:00 PM
5:00 PM 7:00 PM
6:00 PM 8:00 PM
7:00 PM 9:00 PM
8:00 PM 10:00 PM
9:00 PM 11:00 PM
10:00 PM 12:00 AM next day
11:00 PM 1:00 AM next day

MST to EST conversion table

Every hour of the Mountain Time day, plus the common half hours, and their EST equivalents. The second column covers the part of the year when the clocks are on a different gap.

MST to EST conversion table
Mountain Time EDT or EST 2 h ahead, all year EDT 3 h ahead, 0 days in 2026
12:00 AM 2:00 AM3:00 AM
1:00 AM 3:00 AM4:00 AM
2:00 AM 4:00 AM5:00 AM
3:00 AM 5:00 AM6:00 AM
4:00 AM 6:00 AM7:00 AM
5:00 AM 7:00 AM8:00 AM
6:00 AM 8:00 AM9:00 AM
7:00 AM 9:00 AM10:00 AM
8:00 AM 10:00 AM11:00 AM
9:00 AM 11:00 AM12:00 PM
9:30 AM 11:30 AM12:30 PM
10:00 AM 12:00 PM1:00 PM
10:30 AM 12:30 PM1:30 PM
11:00 AM 1:00 PM2:00 PM
11:30 AM 1:30 PM2:30 PM
12:00 PM 2:00 PM3:00 PM
12:30 PM 2:30 PM3:30 PM
1:00 PM 3:00 PM4:00 PM
1:30 PM 3:30 PM4:30 PM
2:00 PM 4:00 PM5:00 PM
2:30 PM 4:30 PM5:30 PM
3:00 PM 5:00 PM6:00 PM
3:30 PM 5:30 PM6:30 PM
4:00 PM 6:00 PM7:00 PM
4:30 PM 6:30 PM7:30 PM
5:00 PM 7:00 PM8:00 PM
5:30 PM 7:30 PM8:30 PM
6:00 PM 8:00 PM9:00 PM
7:00 PM 9:00 PM10:00 PM
8:00 PM 10:00 PM11:00 PM
9:00 PM 11:00 PM12:00 AM (next day)
10:00 PM 12:00 AM (next day)1:00 AM (next day)
11:00 PM 1:00 AM (next day)2:00 AM (next day)

How the gap changes in 2026 and 2027

Each row is a stretch of days with one constant difference, split at every clock change.

Time difference periods between MST and EST
Dates MST EST Difference
Thu, Jan 1, 2026 until Sun, Mar 8, 2026 MST EST EST 2 h ahead
Sun, Mar 8, 2026 until Sun, Mar 8, 2026 MST EDT EDT 3 h ahead
Sun, Mar 8, 2026 until Sun, Nov 1, 2026 MDT EDT EDT 2 h ahead
Sun, Nov 1, 2026 until Sun, Nov 1, 2026 MDT EST EST 1 h ahead
Sun, Nov 1, 2026 until Sun, Mar 14, 2027 MST EST EST 2 h ahead
Sun, Mar 14, 2027 until Sun, Mar 14, 2027 MST EDT EDT 3 h ahead
Sun, Mar 14, 2027 until Sun, Nov 7, 2027 MDT EDT EDT 2 h ahead
Sun, Nov 7, 2027 until Sun, Nov 7, 2027 MDT EST EST 1 h ahead
Sun, Nov 7, 2027 until Sat, Jan 1, 2028 MST EST EST 2 h ahead

Upcoming clock changes

  1. Eastern Time Sunday, November 1, 2026: at 2:00 AM clocks go back 1 hour to 1:00 AM
  2. Mountain Time Sunday, November 1, 2026: at 2:00 AM clocks go back 1 hour to 1:00 AM
  3. Eastern Time Sunday, March 14, 2027: at 2:00 AM clocks go forward 1 hour to 3:00 AM
  4. Mountain Time Sunday, March 14, 2027: at 2:00 AM clocks go forward 1 hour to 3:00 AM
  5. Eastern Time Sunday, November 7, 2027: at 2:00 AM clocks go back 1 hour to 1:00 AM
  6. Mountain Time Sunday, November 7, 2027: at 2:00 AM clocks go back 1 hour to 1:00 AM
  7. Eastern Time Sunday, March 12, 2028: at 2:00 AM clocks go forward 1 hour to 3:00 AM
  8. Mountain Time Sunday, March 12, 2028: at 2:00 AM clocks go forward 1 hour to 3:00 AM

About the two zones

Mountain Time (MST / MDT)

Mountain Time follows the clock in Denver: Mountain Standard Time (MST, UTC−7) in winter and Mountain Daylight Time (MDT, UTC−6) during US daylight saving time.

IANA zone
America/Denver
Offset
UTC−7 standard, UTC−6 daylight saving
Used in
the mountain states of the US and parts of Canada
Major cities
Denver, Salt Lake City, Albuquerque, Calgary, Edmonton, Boise

Most of Arizona stays on MST all year and does not switch to MDT. For Phoenix, pick America/Phoenix in the converter.

Eastern Time (EST / EDT)

Eastern Time follows the clock in New York. It is Eastern Standard Time (EST, UTC−5) in winter and Eastern Daylight Time (EDT, UTC−4) from the second Sunday in March to the first Sunday in November.

IANA zone
America/New_York
Offset
UTC−5 standard, UTC−4 daylight saving
Used in
the eastern United States and Canada
Major cities
New York, Toronto, Washington, D.C., Atlanta, Miami, Boston

People often write EST all year round. Strictly, EST is only the winter offset; in summer the eastern US is on EDT. The converter follows the real New York clock for the date you pick.

MST and EST, answered

What is the time difference between MST and EST?

EDT is 2 hours ahead of MDT for most of the year (238 days in 2026). The gap is 3 hours for 0 days in 2026. The gap is 1 hour for 0 days in 2026.

How do I work out the time in New York from MST?

New York uses Eastern Time. EDT is 2 hours ahead of MDT for most of the year (238 days in 2026). The gap is 3 hours for 0 days in 2026. The gap is 1 hour for 0 days in 2026. Type any MST time into the MST to EST converter to see the New York time for any date.

What is 9:00 AM MST in EST?

9:00 AM MDT or MST is 11:00 AM EDT or EST for all year. 9:00 AM MST is 12:00 PM EDT for 0 days in 2026.

What is 12:00 PM MST in EST?

12:00 PM MDT or MST is 2:00 PM EDT or EST for all year. 12:00 PM MST is 3:00 PM EDT for 0 days in 2026.

What is 10:00 AM MST in EST?

10:00 AM MDT or MST is 12:00 PM EDT or EST for all year. 10:00 AM MST is 1:00 PM EDT for 0 days in 2026.

What is 5:00 PM MST in EST?

5:00 PM MDT or MST is 7:00 PM EDT or EST for all year. 5:00 PM MST is 8:00 PM EDT for 0 days in 2026.

Is EST ahead of MST, and by how many hours?

Yes. EDT is 2 hours ahead of MDT for most of the year (238 days in 2026). The gap is 3 hours for 0 days in 2026. The gap is 1 hour for 0 days in 2026.

What is a good meeting time for MST and EST?

Working days of 9 AM to 5 PM overlap from 9:00 AM to 3:00 PM MDT, which is 11:00 AM to 5:00 PM EDT while MDT and EDT apply.

Does daylight saving time affect MST to EST?

Both zones change their clocks, on their own dates, so the gap can shift during the year. The next change is on Sunday, November 1, 2026 in Eastern Time.

Which MST does the MST to EST converter use?

Most of Arizona stays on MST all year and does not switch to MDT. For Phoenix, pick America/Phoenix in the converter.

Which EST does the MST to EST converter use?

People often write EST all year round. Strictly, EST is only the winter offset; in summer the eastern US is on EDT. The converter follows the real New York clock for the date you pick.

Related conversions

From Mountain Time

To Eastern Time