EST to MST Converter: Eastern to Mountain Time
Converting Eastern Time (ET) to Mountain Time (MT) is straightforward: Mountain Time is 2 hours behind Eastern Time. This means when it's noon in New York, it's 10 AM in Denver. However, there's an important wrinkle: most of Arizona does not observe Daylight Saving Time, so during summer, the gap between Eastern Time and Arizona (which stays on Mountain Standard Time) becomes 3 hours. The live converter above shows the current time in both New York and Denver instantly. For a full world clock, visit Time.now.
The New York to Denver Time Difference
The time difference between New York (Eastern Time) and Denver (Mountain Time) is always 2 hours, year-round. This is because both regions observe Daylight Saving Time (DST) and switch clocks on the same dates (second Sunday in March and first Sunday in November). Eastern Time is UTC-5 in standard time (EST) and UTC-4 in daylight time (EDT). Mountain Time is UTC-7 in standard time (MST) and UTC-6 in daylight time (MDT). So the 2-hour gap remains constant. However, note that Arizona (except the Navajo Nation) does not observe DST, so during summer, Arizona is on MST (UTC-7) while Denver is on MDT (UTC-6), making Arizona 1 hour behind Denver. For conversions involving Arizona, see our Mountain Time (MT) page.
New York to Denver Conversion Table
| Eastern Time (ET) | Mountain Time (MT) |
|---|---|
| 6:00 AM | 4:00 AM |
| 9:00 AM | 7:00 AM |
| 12:00 PM (noon) | 10:00 AM |
| 2:00 PM | 12:00 PM (noon) |
| 4:00 PM | 2:00 PM |
| 6:00 PM | 4:00 PM |
| 9:00 PM | 7:00 PM |
| 11:59 PM | 9:59 PM |
For conversions to Pacific Time, see our EST to PST Converter and PST to EST Converter.
Best Times to Schedule Calls
When scheduling calls between New York and Denver, the best overlap is typically 10:00 AM to 4:00 PM Mountain Time (12:00 PM to 6:00 PM Eastern). This covers standard business hours in both zones. The table below shows common meeting times:
| Eastern Time | Mountain Time | Overlap? |
|---|---|---|
| 8:00 AM | 6:00 AM | Early, not ideal |
| 10:00 AM | 8:00 AM | Good start |
| 12:00 PM | 10:00 AM | Perfect |
| 2:00 PM | 12:00 PM | Perfect |
| 4:00 PM | 2:00 PM | Good end |
| 6:00 PM | 4:00 PM | Late for MT |
If you need to coordinate with other US time zones, check our EST to CST Converter and Eastern Time (ET) page. For specific city times, see time in Miami and time in Boston. For worldwide city times, use TimeRight.Now or CurrentTime.now.
Frequently Asked Questions
What is the time difference between EST and MST?
EST (Eastern Standard Time) is 2 hours ahead of MST (Mountain Standard Time). For example, 12:00 PM EST is 10:00 AM MST.
Does the time difference change during Daylight Saving Time?
No. Both Eastern Time and Mountain Time observe DST, so the 2-hour gap remains constant year-round. However, Arizona (which stays on MST) is 3 hours behind Eastern Time during summer.
What is the time difference between EDT and MDT?
EDT (Eastern Daylight Time) is 2 hours ahead of MDT (Mountain Daylight Time). For example, 12:00 PM EDT is 10:00 AM MDT.
How do I convert EST to MST?
Simply subtract 2 hours from the Eastern Time. Use the conversion table above for common times.
Is Mountain Time the same as Arizona time?
Not exactly. Most of Arizona uses Mountain Standard Time (MST) all year, without DST. So during standard time (winter), Arizona is the same as Denver. During daylight time (summer), Arizona is 1 hour behind Denver (which is on MDT).
What is the best time to call someone in Denver from New York?
The best time is between 10:00 AM and 4:00 PM Mountain Time, which is 12:00 PM to 6:00 PM Eastern Time. This covers typical business hours in both cities.