EST to MST converter
MST is 2 hours behind EST. EST and MST are exactly 2 hours apart on every day of the year. The full hour-by-hour table is below, and it reads perfectly well with JavaScript turned off. No account, no email address.
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For conversions between other time zones, visit timezone.day.
EST to MST, hour by hour
Shaded rows are inside a nine-to-five working day in both New York and Denver.
| EST | MST |
|---|---|
| 6:00am | 4:00am |
| 7:00am | 5:00am |
| 8:00am | 6:00am |
| 9:00am | 7:00am |
| 10:00am | 8:00am |
| 11:00am | 9:00am |
| 12:00pm | 10:00am |
| 1:00pm | 11:00am |
| 2:00pm | 12:00pm |
| 3:00pm | 1:00pm |
| 4:00pm | 2:00pm |
| 5:00pm | 3:00pm |
| 6:00pm | 4:00pm |
| 7:00pm | 5:00pm |
| 8:00pm | 6:00pm |
| 9:00pm | 7:00pm |
| 10:00pm | 8:00pm |
EST to MST never changes by an hour
Both are United States zones, both change their clocks on the second Sunday in March and the first Sunday in November, and both move by the same hour on the same morning. There is no date on which this conversion is anything other than 2 hours behind.
What changes is the name. Between March and November those same two clocks are properly called EDT and MDT, for Eastern Daylight Time and Mountain Daylight Time. Almost nobody switches, and it does not matter here: whoever writes EST in July has the right time and the wrong letters.
EST and MST
- Same all year
- Yes
- Shared office hours
- 6 hours
Booking a call between New York and Denver
You share about 6 hours of a normal nine-to-five day. 11:00am to 5:00pm in EST is 9:00am to 3:00pm in MST. That is inside office hours at both ends, and the only window where neither side is doing you a favour.
When it is 9:00am in New York it is 7:00am in Denver. When Denver opens at 9:00am, New York reads 11:00am.
EST covers the US east coast and eastern Canada, including New York, Toronto, Atlanta, Miami and Boston. MST covers the US mountain states and Alberta, including Denver, Phoenix, Salt Lake City and Calgary.
CDT to MST is the same conversion
CDT to MST describes exactly the same 2 hours shift as EST to MST. The letters differ because they name the winter and summer forms of the same clocks; the arithmetic does not differ at all.
So the table above answers that query too. There is no second page to look for, and no version of the year in which the answer is different.
EST to MST: common questions
What time is it in MST when it is 9am EST?
7:00am. MST is 2 hours behind EST. The table above runs the same conversion for every hour of the day.
Is EST to MST ever a different number of hours?
No. Both are United States zones and both change their clocks on the same two mornings, so the difference is 2 hours in January and the same in July. The abbreviations change to EDT and MDT in summer; the gap does not.
Does converting EST to MST ever change the date?
For most of the working day, no: the two clocks stay on the same calendar day. Late evening and very early morning can straddle midnight, which is why the table above shows the day alongside the time.
What is a good time to schedule a call between EST and MST?
You share about 6 hours of the normal nine-to-five working day: 11:00am to 5:00pm in EST is 9:00am to 3:00pm in MST. Anything inside that window is inside office hours at both ends.
Is this EST to MST converter free?
Yes, completely. No account, no email address, no trial. The table works with JavaScript turned off and nothing you type is sent anywhere.
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