EST to MST Converter & Meeting Planner
Quick answer: 9:00 AM EST = 7:00 AM MST (fixed -05:00 standard offset — not DST-adjusted). Use the interactive converter below for DST-aware local-time scheduling.
Planning a call or meeting between Eastern Standard Time (EST) and Mountain Standard Time (MST)? You need to account for the standard time difference. Mountain Standard Time is normally 2 hours behind Eastern Standard Time. Whether you are coordinating between teams in New York and Toronto and Denver and Phoenix, our live tool has you covered. Use our interactive overlap studio below to find the perfect waking hours for both regions, taking into account any seasonal Daylight Saving Time (DST) changes.
24-Hour Conversion Table
Quick reference: 12:00 AM EST = 10:00 PM MST. The full 24-hour EST to MST table below uses fixed standard offsets for exact abbreviation searches.
Example: 3:00 PM EST = 1:00 PM MST.
| EST Time | MST Time |
|---|---|
| 12:00 AM (00:00) | 10:00 PM (22:00)-1 day |
| 1:00 AM (01:00) | 11:00 PM (23:00)-1 day |
| 2:00 AM (02:00) | 12:00 AM (00:00) |
| 3:00 AM (03:00) | 1:00 AM (01:00) |
| 4:00 AM (04:00) | 2:00 AM (02:00) |
| 5:00 AM (05:00) | 3:00 AM (03:00) |
| 6:00 AM (06:00) | 4:00 AM (04:00) |
| 7:00 AM (07:00) | 5:00 AM (05:00) |
| 8:00 AM (08:00) | 6:00 AM (06:00) |
| 9:00 AM (09:00) | 7:00 AM (07:00) |
| 10:00 AM (10:00) | 8:00 AM (08:00) |
| 11:00 AM (11:00) | 9:00 AM (09:00) |
| 12:00 PM (12:00) | 10:00 AM (10:00) |
| 1:00 PM (13:00) | 11:00 AM (11:00) |
| 2:00 PM (14:00) | 12:00 PM (12:00) |
| 3:00 PM (15:00) | 1:00 PM (13:00) |
| 4:00 PM (16:00) | 2:00 PM (14:00) |
| 5:00 PM (17:00) | 3:00 PM (15:00) |
| 6:00 PM (18:00) | 4:00 PM (16:00) |
| 7:00 PM (19:00) | 5:00 PM (17:00) |
| 8:00 PM (20:00) | 6:00 PM (18:00) |
| 9:00 PM (21:00) | 7:00 PM (19:00) |
| 10:00 PM (22:00) | 8:00 PM (20:00) |
| 11:00 PM (23:00) | 9:00 PM (21:00) |
Best time to call Denver from New York
For most work calls, compare the normal business day in New York (EST) with the business day in Denver (MST). EST commonly covers North America, Caribbean, Central America, while MST is mainly associated with North America.
⚠️ Note: 2026-07-05 is not a normal workday in one or both regions based on their configured calendar. The overlap below should be treated as a reference, not a guaranteed office-hours window.
✅ The most practical overlap on 2026-07-05 is usually 11:00 AM - 5:00 PM EST, which corresponds to 9:00 AM - 3:00 PM MST. This window sits inside the typical EST workday (9:00 AM - 5:00 PM) and the MST workday (9:00 AM - 5:00 PM).
- DST Safety: EST or MST may shift during Daylight Saving Time. Always confirm the converted time for your specific date.
- NYSE & NASDAQ: 09:30-16:00 local time in New York.
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Frequently Asked Questions
What is the time difference between EST and MST?
During standard time, Mountain Standard Time is 2 hours behind Eastern Standard Time.
Is EST the same as Eastern Time (ET)?
Not exactly. 'Eastern Time' (ET) is a broad geographical term. EST is the specific UTC-05:00 offset used in winter, while EDT (Eastern Daylight Time) is the UTC-04:00 offset used during summer.
Does Florida use EST?
Most of Florida is in the Eastern Time Zone. However, the western part of the Florida Panhandle operates on Central Time (CST/CDT).
Does Arizona observe Daylight Saving Time?
Most of Arizona — including Phoenix, Tucson, and the state government — does not observe Daylight Saving Time, remaining on MST (UTC-7) year-round under a state law in effect since 1968. The significant exception is the Navajo Nation, which spans parts of northeastern Arizona, Utah, and New Mexico and does observe DST, creating one of the most complex intrastate time zone situations in the United States.
What is the difference between MST and MDT?
MST (Mountain Standard Time) is the winter offset at UTC-7:00, observed from the first Sunday in November through the second Sunday in March. MDT (Mountain Daylight Time) is the summer offset at UTC-6:00, applied when most Mountain Time regions advance their clocks by one hour during Daylight Saving Time.