This EST to MST converter turns any time in Eastern Standard Time (EST) into Mountain Standard Time (MST), using your device clock so daylight saving is applied automatically. MST is 2 hours behind EST. EST is UTC−5 (EDT: UTC−4); MST is UTC−7 (MDT: UTC−6).
EST covers New York, Toronto, Miami; MST covers Denver, Salt Lake City, Phoenix (no DST). Because both zones change their clocks on different dates, the difference is not constant through the year. The tables below show both cases, and the converter at the top always uses the rule in force on the date you pick.
EST and MST UTC offsets
EST
UTC−5
Eastern Standard Time
EDT UTC−4 from March 8 to November 1, 2026
MST
UTC−7
Mountain Standard Time
MDT UTC−6 from March 8 to November 1, 2026
EST to MST conversion table
| EST | MST |
|---|---|
| 12 am | 10 pmprevious day |
| 3 am | 1 am |
| 6 am | 4 am |
| 8 am | 6 am |
| 9 am | 7 am |
| 10 am | 8 am |
| 11 am | 9 am |
| 12 pm | 10 am |
| 1 pm | 11 am |
| 2 pm | 12 pm |
| 3 pm | 1 pm |
| 4 pm | 2 pm |
| 5 pm | 3 pm |
| 6 pm | 4 pm |
| 8 pm | 6 pm |
| 10 pm | 8 pm |
Frequently asked questions
What is the time difference between EST and MST?
MST is 2 hours behind EST. That comes from the UTC offsets: EST is UTC−5 and MST is UTC−7. For example, 9 am EST = 7 am MST.
Is MST ahead of or behind EST?
MST is 2 hours behind EST, so when it is noon in EST it is 10 am in MST. Ahead means the clock there already shows a later time; a call at 5 pm EST lands at 3 pm MST.
Does EST or MST observe daylight saving time in 2026?
EST switches to EDT (UTC−4) on March 8 and back on November 1 in 2026. MST switches to MDT (UTC−6) on March 8 and back on November 1. Between those dates the difference in the table above shifts by an hour, which is the usual cause of missed calls in spring and autumn.
What is the best time for a meeting between EST and MST?
Standard office hours (9 am to 5 pm) overlap from 11 am to 5 pm EST, which is 9 am to 3 pm MST. Pick a slot inside that window and both sides stay within a normal working day. Check the daylight saving dates above, because the window moves by an hour when only one side has changed clocks.
Which cities use EST and MST?
EST (Eastern Standard Time) is used in New York, Toronto, Miami, Atlanta. MST (Mountain Standard Time) is used in Denver, Salt Lake City, Phoenix (no DST). Some cities inside a zone skip daylight saving, noted in parentheses, so their offset matches only part of the year.