MST to Ottawa Time Converter
EST is 2 hours ahead of MST. 9:00 AM MST = 11:00 AM EST.
EST is 2 hours ahead of MST. To convert MST to Ottawa Time, add 2 hours to the MST time: 9:00 AM MST = 11:00 AM EST.
MST (Mountain Time) is used in Denver, Salt Lake City, Albuquerque, Calgary, Edmonton; Phoenix (Arizona) all year. Ottawa Time (Ottawa time) is used in Ottawa, Canada.
Most of Arizona uses MST all year and does not switch to MDT.
MST to Ottawa Time time conversion table
MST to Ottawa Time on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| MST | Ottawa Time |
|---|---|
| 12:00 AM | 2:00 AM |
| 1:00 AM | 3:00 AM |
| 2:00 AM | 4:00 AM |
| 3:00 AM | 5:00 AM |
| 4:00 AM | 6:00 AM |
| 5:00 AM | 7:00 AM |
| 6:00 AM | 8:00 AM |
| 7:00 AM | 9:00 AM |
| MST | Ottawa Time |
|---|---|
| 8:00 AM | 10:00 AM |
| 9:00 AM | 11:00 AM |
| 10:00 AM | 12:00 PM |
| 11:00 AM | 1:00 PM |
| 12:00 PM | 2:00 PM |
| 1:00 PM | 3:00 PM |
| 2:00 PM | 4:00 PM |
| 3:00 PM | 5:00 PM |
| MST | Ottawa Time |
|---|---|
| 4:00 PM | 6:00 PM |
| 5:00 PM | 7:00 PM |
| 6:00 PM | 8:00 PM |
| 7:00 PM | 9:00 PM |
| 8:00 PM | 10:00 PM |
| 9:00 PM | 11:00 PM |
| 10:00 PM | 12:00 AM+1 |
| 11:00 PM | 1:00 AM+1 |
Conversion table from MST to Ottawa Time for 7 Nov 2026. A tick marks hours that fall between 9 AM and 5 PM in both places. +1 means the next day in Ottawa Time, −1 the previous day.
- ✓ marks 9 AM–5 PM in both places
- Greyed times are night in the destination (10 PM–6 AM)
How to convert MST to Ottawa Time
Add 2 hours to the MST time to get Ottawa Time.
Example: 9:00 AM MST = 11:00 AM EST.
Across midnight: 10:00 PM MST = 12:00 AM EST (next day). The date changes, so always check the day as well as the hour.
Time difference between MST and Ottawa Time
The time difference between MST and Ottawa Time is 2 hours all year – EST is ahead of MST.
MST and Ottawa Time during daylight saving time
- MST next changes on 14 Mar 2027: clocks go forward one hour at 01:59 local time, from MST (UTC−7) to MDT (UTC−6).
- Ottawa Time next changes on 14 Mar 2027: clocks go forward one hour at 01:59 local time, from EST (UTC−5) to EDT (UTC−4).
Best time for a meeting between MST and Ottawa Time
MST and Ottawa Time share 6 hours of the 9 AM–5 PM working day. Any time between 9:00 AM and 3:00 PM MST lands between 11:00 AM and 5:00 PM EST, inside working hours for both.
MST to Ottawa Time FAQ
What is the time difference between MST and Ottawa Time?
EST is 2 hours ahead of MST all year. 9:00 AM MST = 11:00 AM EST.
What is 9 AM MST in Ottawa Time?
9:00 AM MST is 11:00 AM EST.
What is 12 PM (noon) MST in Ottawa Time?
12:00 PM MST is 2:00 PM EST.
Is Ottawa Time ahead of or behind MST?
EST is 2 hours ahead of MST, so it is later in Ottawa Time than in MST.
Does MST change for daylight saving time?
Yes. MST next changes on 14 Mar 2027, when clocks go forward one hour from MST to MDT.
Does Ottawa Time change for daylight saving time?
Yes. Ottawa Time next changes on 14 Mar 2027, when clocks go forward one hour from EST to EDT.
What is the best time for a meeting between MST and Ottawa Time?
MST and Ottawa Time share 6 hours of the 9 AM–5 PM working day. Any time between 9:00 AM and 3:00 PM MST lands between 11:00 AM and 5:00 PM EST, inside working hours for both.
Is MT the same as MST?
MST is the winter (standard) name of Mountain Time (MT). From March to November the same clocks are called MDT. This converter always uses the one in force on the date you choose.
Related conversions
Convert Ottawa Time to MST
Convert MST to other time zones
Convert other time zones to Ottawa Time
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.