EST to MST converter
When it's 9:00 am in New York, it's 7:00 am in Denver. Your 9-to-5 working days overlap for 6 hours, so there's room for a meeting most days.
Convert Eastern Standard Time (EST) to Mountain Standard Time (MST) for any date and time.
Mountain Time is 2 hours behind Eastern Time all year.
Right now Eastern Time is on EDT (UTC−4) and Mountain Time is on MDT (UTC−6). Both switch back to standard time on 1 November 2026.
US clocks go back on 1 November 2026. From then, MST is still 2 hours behind EST.
9:00 am to 5:00 pm EST is 7:00 am to 3:00 pm MST.
- 8:00 am EST is 6:00 am MST
- 9:00 am EST is 7:00 am MST
- 10:00 am EST is 8:00 am MST
- 12:00 pm EST is 10:00 am MST
- 3:00 pm EST is 1:00 pm MST
- 5:00 pm EST is 3:00 pm MST
Hours in Eastern Time, Fri, Oct 23
Eastern Time
US & Canada
Fri, Oct 23
EDT · UTC−4ReferenceOutside working hoursMountain Time
US & Canada; Arizona stays on MST
Fri, Oct 23
MDT · UTC−6−2h from Eastern TimeOutside working hours
Best time to meet: 11:00 AM–5:00 PM in Eastern Time on Fri, Oct 23, when everyone is inside working hours.
Book a meeting in this windowWorking hours: 9:00 AM–5:00 PM, Monday to FridayEveryone at work
EST to MST conversion table
Every hour of the day in EST, converted to MST. Shaded cells are working hours (9:00 am to 5:00 pm); green rows are working hours in both zones.
| EST | MST |
|---|---|
| 12:00 am EST | 10:00 pm MST(day before) |
| 1:00 am EST | 11:00 pm MST(day before) |
| 2:00 am EST | 12:00 am MST |
| 3:00 am EST | 1:00 am MST |
| 4:00 am EST | 2:00 am MST |
| 5:00 am EST | 3:00 am MST |
| 6:00 am EST | 4:00 am MST |
| 7:00 am EST | 5:00 am MST |
| 8:00 am EST | 6:00 am MST |
| 9:00 am EST | 7:00 am MST |
| 10:00 am EST | 8:00 am MST |
| 11:00 am EST | 9:00 am MST |
| 12:00 pm EST | 10:00 am MST |
| 1:00 pm EST | 11:00 am MST |
| 2:00 pm EST | 12:00 pm MST |
| 3:00 pm EST | 1:00 pm MST |
| 4:00 pm EST | 2:00 pm MST |
| 5:00 pm EST | 3:00 pm MST |
| 6:00 pm EST | 4:00 pm MST |
| 7:00 pm EST | 5:00 pm MST |
| 8:00 pm EST | 6:00 pm MST |
| 9:00 pm EST | 7:00 pm MST |
| 10:00 pm EST | 8:00 pm MST |
| 11:00 pm EST | 9:00 pm MST |
Best times to meet
Your working hours overlap for 6 hours, from 11:00 am EST (9:00 am MST) to 5:00 pm EST (3:00 pm MST). That's the best window for a meeting.
About these time zones
EST: Eastern Standard Time
Eastern Standard Time is UTC−5.
New York, Florida, Georgia, the Carolinas, Ohio, Michigan and the rest of the East Coast, plus Ontario and Quebec in Canada. Panama, Jamaica and Cancún stay on EST all year. ET is the short form for the whole zone.
Most places on Eastern Time are on EDT (UTC−4) right now, not EST. People still say "EST" all year, so the times on this page follow the clocks and show EDT until 1 November 2026.
MST: Mountain Standard Time
Mountain Standard Time is UTC−7. MST is also used for Malaysia Standard Time (UTC+8). This page converts US Mountain Time.
Colorado, Utah, New Mexico, Wyoming, Montana and southern Idaho, plus Alberta in Canada. Most of Arizona stays on MST all year (the Navajo Nation follows daylight saving time). MT is the short form for the whole zone.
Most places on Mountain Time are on MDT (UTC−6) right now, not MST. People still say "MST" all year, so the times on this page follow the clocks and show MDT until 1 November 2026.
How the difference changes
Both zones change their clocks on the same dates (next on 1 November 2026), so the difference stays 2 hours all year.