EST to MST Converter – Eastern Time to Mountain Time
12:00 PM EST = 10:00 AM MST
When it is noon Eastern Time (EST), it is 10:00 AM MST (Thu) in Mountain Time. The difference is −2 hours in January and −2 hours in July.
Step by step
- Find the time difference: MST is −2 hours relative to EST (January).
- Add or subtract that many hours from the EST time.
- Check daylight saving: in July the difference is −2 hours.
- If the result passes midnight, the date changes too.
Hour by hour (January): 12:00 AM EST → 10:00 PM MST (Wed); 3:00 AM EST → 1:00 AM MST (Thu); 6:00 AM EST → 4:00 AM MST (Thu); 8:00 AM EST → 6:00 AM MST (Thu); 9:00 AM EST → 7:00 AM MST (Thu); 12:00 PM EST → 10:00 AM MST (Thu); 3:00 PM EST → 1:00 PM MST (Thu); 5:00 PM EST → 3:00 PM MST (Thu); 6:00 PM EST → 4:00 PM MST (Thu); 9:00 PM EST → 7:00 PM MST (Thu). During daylight saving time, EST becomes EDT and MST becomes MDT.
Details
- EST zone
- Eastern Time (America/New_York)
- MST zone
- Mountain Time (America/Denver)
- Difference in winter
- −2 hours
- Difference in summer
- −2 hours
- 9 AM EST is
- 7:00 AM MST (Thu)
- 5 PM EST is
- 3:00 PM MST (Thu)
How it works
Time zones are offsets from Coordinated Universal Time (UTC). Many people say “EST” or “PST” all year, but strictly EST and PST are standard time; during US daylight saving time (second Sunday in March to first Sunday in November) clocks use EDT and PDT. Countries such as Pakistan, India and Japan do not use daylight saving time, so their difference from US time changes twice a year. The converter above uses the official time zone database, so it is correct for any date.
Nearby values
| Conversion | Time difference |
|---|---|
| EST to CST | −1 hours (winter) / −1 hours (summer) |
| CST to EST | +1 hours (winter) / +1 hours (summer) |
| CST to PST | −2 hours (winter) / −2 hours (summer) |
| PST to CST | +2 hours (winter) / +2 hours (summer) |
| EST to MST | −2 hours (winter) / −2 hours (summer) |
| MST to EST | +2 hours (winter) / +2 hours (summer) |
| MST to PST | −1 hours (winter) / −1 hours (summer) |
| PST to MST | +1 hours (winter) / +1 hours (summer) |
| UTC to EST | −5 hours (winter) / −4 hours (summer) |
Related conversions
Frequently asked questions
What time is it in MST when it is noon EST?
10:00 AM MST (Thu) in winter.
How many hours difference is EST to MST?
−2 hours in January and −2 hours in July.
What is 9 AM EST in MST?
7:00 AM MST (Thu) (winter).
Does EST to MST change with daylight saving?
No — the difference stays the same all year.