EST to MST Converter
Convert time between Eastern Standard Time (EST) and Mountain Time (MST/MDT).
Convert a specific time
- IndiaIST, UTC+5:30
- Eastern Time – New YorkEDT, UTC-4
- Central Time – ChicagoCDT, UTC-5
- Mountain Time – DenverMDT, UTC-6
- Arizona – PhoenixMST, UTC-7
- Pacific Time – Los AngelesPDT, UTC-7
- Mexico CityCST, UTC-6
- Saskatchewan – ReginaCST, UTC-6
- UTC / GMTUTC, UTC+0
- United Kingdom – LondonBST, UTC+1
- Central Europe – Paris, BerlinCEST, UTC+2
- Gulf – DubaiGST, UTC+4
- SingaporeSGT, UTC+8
- Japan – TokyoJST, UTC+9
- Australia Eastern – SydneyAEST, UTC+10
- EST (always UTC-5)Fixed offset, no DST
- CST (always UTC-6)Fixed offset, no DST
- MST (always UTC-7)Fixed offset, no DST
- PST (always UTC-8)Fixed offset, no DST
- IndiaIST, UTC+5:30
- Eastern Time – New YorkEDT, UTC-4
- Central Time – ChicagoCDT, UTC-5
- Mountain Time – DenverMDT, UTC-6
- Arizona – PhoenixMST, UTC-7
- Pacific Time – Los AngelesPDT, UTC-7
- Mexico CityCST, UTC-6
- Saskatchewan – ReginaCST, UTC-6
- UTC / GMTUTC, UTC+0
- United Kingdom – LondonBST, UTC+1
- Central Europe – Paris, BerlinCEST, UTC+2
- Gulf – DubaiGST, UTC+4
- SingaporeSGT, UTC+8
- Japan – TokyoJST, UTC+9
- Australia Eastern – SydneyAEST, UTC+10
- EST (always UTC-5)Fixed offset, no DST
- CST (always UTC-6)Fixed offset, no DST
- MST (always UTC-7)Fixed offset, no DST
- PST (always UTC-8)Fixed offset, no DST
Time Difference
Eastern Time is 2 hours ahead of Mountain Time right now.
- Now until Nov 1, 2026: Eastern Time is 2 hours ahead of Mountain Time (EDT → MDT).
- Nov 1, 2026 – Nov 1, 2026: Eastern Time is 1 hour ahead of Mountain Time (EST → MDT).
- Nov 1, 2026 – Mar 14, 2027: Eastern Time is 2 hours ahead of Mountain Time (EST → MST).
- Mar 14, 2027 – Mar 14, 2027: Eastern Time is 3 hours ahead of Mountain Time (EDT → MST).
- From Mar 14, 2027: Eastern Time is 2 hours ahead of Mountain Time (EDT → MDT).
Eastern Time is on EDT right now, not EST
Mountain Time is on MDT right now, not MST
Best time to call
Convenient overlapping hours on Saturday, September 19, 2026.
| EST (Eastern Time) | MDT (Mountain Time) |
|---|---|
| 11:00 AM | 9:00 AM |
| 12:00 PM | 10:00 AM |
| 1:00 PM | 11:00 AM |
| 2:00 PM | 12:00 PM |
These hours fall within 9 AM–5 PM in both places.
Convert another time zone Plan a meeting across EST and MSTEST to MST conversion table
For Saturday, September 19, 2026 in Eastern Time.
| EDT | MDT |
|---|---|
| 12:00 AM | 10:00 PM(previous day) |
| 1:00 AM | 11:00 PM(previous day) |
| 2:00 AM | 12:00 AM |
| 3:00 AM | 1:00 AM |
| 4:00 AM | 2:00 AM |
| 5:00 AM | 3:00 AM |
| 6:00 AM | 4:00 AM |
| 7:00 AM | 5:00 AM |
| 8:00 AM | 6:00 AM |
| 9:00 AM | 7:00 AM |
| 10:00 AM | 8:00 AM |
| 11:00 AM | 9:00 AM |
| 12:00 PM | 10:00 AM |
| 1:00 PM | 11:00 AM |
| 2:00 PM | 12:00 PM |
| 3:00 PM | 1:00 PM |
| 4:00 PM | 2:00 PM |
| 5:00 PM | 3:00 PM |
| 6:00 PM | 4:00 PM |
| 7:00 PM | 5:00 PM |
| 8:00 PM | 6:00 PM |
| 9:00 PM | 7:00 PM |
| 10:00 PM | 8:00 PM |
| 11:00 PM | 9:00 PM |
About these time zones
Eastern Standard Time (EST)
Eastern Standard Time (EST) is UTC-5. Most places on Eastern Time use EST only in winter; from the second Sunday in March to the first Sunday in November they observe Eastern Daylight Time (EDT, UTC-4). People often write “EST” all year when they mean Eastern Time, so check which one is in effect.
Mountain Standard Time (MST)
Mountain Standard Time (MST) is UTC-7. Denver, Salt Lake City, Alberta and most of the Mountain region use MST in winter and Mountain Daylight Time (MDT, UTC-6) in summer. Arizona (except the Navajo Nation), Sonora, several other Mexican states, Yukon and parts of British Columbia use UTC-7 all year, so in summer they match Pacific Daylight Time.
EST to MST FAQs
What time is it in MST when it is 9 AM EST?
On Saturday, September 19, 2026, 9:00 AM EDT is 7:00 AM MDT in Mountain Time.
How many hours ahead is EST from MST?
It depends on the time of year because of daylight saving time. Now until Nov 1, 2026: Eastern Time is 2 hours ahead of Mountain Time (EDT → MDT). Nov 1, 2026 – Nov 1, 2026: Eastern Time is 1 hour ahead of Mountain Time (EST → MDT).
Should I use MST or MDT?
Mountain Time is on MDT (UTC-6) on Saturday, September 19, 2026. Many people write “MST” all year, but strictly MST means Mountain Standard Time (always UTC-7). This converter follows the real local time in Mountain Time, including daylight saving time.
What is the best time for a call between EST and MST?
On Saturday, September 19, 2026, good options are 11:00 AM EDT (9:00 AM MDT), 12:00 PM EDT (10:00 AM MDT), 1:00 PM EDT (11:00 AM MDT), 2:00 PM EDT (12:00 PM MDT). These fall within normal 9 AM–5 PM working hours in both places.
Does EST change for daylight saving time?
The region changes: Eastern Time switches between EST and EDT, so conversions depend on the date. EST itself always means UTC-5.
Does MST change for daylight saving time?
The region changes: Mountain Time switches between MST and MDT, so conversions depend on the date. MST itself always means UTC-7.