EST vs MST
Eastern Time (US & Canada) (EST/EDT) is UTC−5 in winter and UTC−4 in summer. Mountain Time (US & Canada) (MST/MDT) is UTC−7 in winter and UTC−6 in summer.
The difference is a constant 2 hours behind — both zones switch to daylight saving on the same dates.
EST to MST conversion table
Applies all year:
| EST/EDT | MST/MDT |
|---|---|
| 12:00 AM | 10:00 PM (−1 day) |
| 6:00 AM | 4:00 AM |
| 8:00 AM | 6:00 AM |
| 9:00 AM | 7:00 AM |
| 10:00 AM | 8:00 AM |
| 12:00 PM | 10:00 AM |
| 2:00 PM | 12:00 PM |
| 3:00 PM | 1:00 PM |
| 5:00 PM | 3:00 PM |
| 6:00 PM | 4:00 PM |
| 8:00 PM | 6:00 PM |
| 10:00 PM | 8:00 PM |
Scheduling between EST and MST
With only 2 hours between them, normal working hours overlap most of the day — a call at 10 AM in Eastern Time (US & Canada) is 8:00 AM in Mountain Time (US & Canada). Always write the city alongside the abbreviation in invites — several abbreviations (CST, IST, AST) are used by more than one region.
Related conversions
PST to EST · EST to PST · CST to EST · EST to CST · MST to EST · PST to MST · MST to PST · EST to AST · AST to EST · UTC to EST · all zones