EST: Eastern Time
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MST is 2 hours behind EST all year.
Both clocks change for daylight saving on similar schedules, so the gap between them does not move.
One instant, two local clocks
Both lanes show the same instant. Local dates, daylight, and offsets come from each IANA zone on the selected date, so daylight saving changes are included.
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Local times come from your browser's IANA time zone data.
| EST | MST |
|---|---|
| 12:00 AM | 10:00 PM (prev day) |
| 1:00 AM | 11:00 PM (prev 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 |
Standard business hours (9:00 AM to 5:00 PM) overlap from 11:00 AM to 5:00 PM in EST, which is 9:00 AM to 3:00 PM in MST.
Offsets are computed from the IANA time zone database for January 15 and July 15 of the current year. EST here means Eastern Time (United States and Canada); MST means Mountain Time (United States and Canada).