MST to EST
+2hMST
MSTSOURCEEST
ESTGreen rows indicate typical business hours (9 AM - 5 PM)
MST and EST on the World Map
The map below highlights the MST (Mountain Standard Time) and EST (Eastern Standard Time) timezone regions across the globe.
MST – Mountain Standard Time
UTC-07:00Mountain Standard Time (MST) is the time zone for the Mountain region of North America, 7 hours behind UTC.
- •Arizona does not observe daylight saving time, staying on MST year-round.
- •The Navajo Nation in Arizona does observe DST, unlike the rest of the state.
- •Denver, the 'Mile High City', is the largest city fully in MST.
- •MST covers 6 US states entirely and parts of several others.
EST – Eastern Standard Time
UTC-05:00Eastern Standard Time (EST) is the time zone for the eastern United States and Canada, 5 hours behind UTC.
- •EST is the most widely used time zone in the United States by population.
- •The New York Stock Exchange (NYSE) and NASDAQ operate on Eastern Time, opening at 9:30 AM EST.
- •23 US states are fully or partially in the Eastern Time Zone.
- •EST was established by the Standard Time Act of 1918.
- •Over 47% of the US population lives in the Eastern Time Zone.
MST vs EST: Offsets, DST and Best Call Times
MST runs on Mountain Standard Time (MST) at UTC-07:00. EST runs on Eastern Standard Time (EST) at UTC-05:00. That puts MST 2 hours ahead of EST — a difference of +2h at the current offsets.
In practice, when it is 9:00 AM in MST it is 11:00 AM in EST. Midnight in MST is 2:00 AM in EST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
MST to EST time conversion table
| MST (MST) | EST (EST) | Day |
|---|---|---|
| 12:00 AM | 2:00 AM | same day |
| 6:00 AM | 8:00 AM | same day |
| 7:00 AM | 9:00 AM | same day |
| 8:00 AM | 10:00 AM | same day |
| 9:00 AM | 11:00 AM | same day |
| 12:00 PM | 2:00 PM | same day |
| 3:00 PM | 5:00 PM | same day |
| 5:00 PM | 7:00 PM | same day |
| 6:00 PM | 8:00 PM | same day |
| 9:00 PM | 11:00 PM | same day |
Why people convert MST to EST time
- Scheduling a call from MST to EST: a 10:00 AM start in MST lands at 12:00 PM in EST, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both MST and EST are inside the 9-to-5 working day between 9:00 AM and 3:00 PM MST time (11:00 AM–5:00 PM EST). That is roughly 6 hours of usable overlap.
- Watching a live event or market open: MST viewers need 11:00 AM in EST to catch a 9:00 AM start there, and 10:00 PM if the event is anchored to MST.
- Always state the zone abbreviation, not just the hour. "3:00 PM MST" is unambiguous; "3 PM" across a +2h gap is not.
- Block 9:00 AM–3:00 PM MST as the recurring meeting window if you work primarily from MST and need EST colleagues present.
About MST (Mountain Standard Time)
Mountain Standard Time (MST) covers the Rocky Mountain region of the United States and Canada. Arizona is notable for not observing daylight saving time, staying on MST year-round (except the Navajo Nation). The time zone includes major cities like Denver, Phoenix, Calgary, and Salt Lake City. During summer, most areas switch to Mountain Daylight Time (MDT, UTC-06:00).
About EST (Eastern Standard Time)
Eastern Standard Time (EST) is observed during the winter months in the eastern part of North America. It covers 23 US states and parts of Canada including Ontario and Quebec. EST is the most populous time zone in the United States, home to major financial centers like New York City and global organizations headquartered in Washington D.C. During daylight saving time (March–November), clocks shift to Eastern Daylight Time (EDT, UTC-04:00). The time zone also covers parts of the Caribbean and Central America including Panama, Jamaica, and the Cayman Islands.
Best time to call between MST and EST
Both MST and EST sit inside the 9 AM – 5 PM working day between 9:00 AM–3:00 PM MST, which is 11:00 AM–5:00 PM EST. That gives roughly 6 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
MST and EST share 6 hours of working-hours overlap (9:00 AM–3:00 PM MST), so scheduling a live meeting is straightforward.
MST is 2 hours ahead of EST (MST UTC-07:00 → EST UTC-05:00). The shared working window is 9:00 AM–3:00 PM MST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
MST
☀ Currently in DST
Standard: UTC-07:00 · DST: UTC-06:00
Clocks fall back on Sun, Nov 1, 2026
EST
☀ Currently in DST
Standard: UTC-05:00 · DST: UTC-04:00
Clocks fall back on Sun, Nov 1, 2026
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between MST and EST?
MST (MST, UTC-07:00) is 2 hours ahead of EST (EST, UTC-05:00). The gap is currently +2h.
How do I convert MST time to EST time?
Add +2h to MST local time. For example, 9:00 AM in MST is 11:00 AM in EST.
What time is it in EST right now?
EST uses EST at UTC-05:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +2h offset from MST.
What is the best time to call EST from MST?
Call between 9:00 AM and 3:00 PM MST — that maps to 11:00 AM–5:00 PM EST and keeps both parties inside the working day.
Which is ahead, MST or EST?
MST is 2 hours ahead of EST. When it is 12:00 PM in MST it is 2:00 PM in EST.
Does daylight saving time affect the MST–EST difference?
Neither zone observes daylight saving time, so the +2h offset between MST and EST is fixed all year.
Which other cities share MST's time zone?
MST also covers Denver, Phoenix, Salt Lake City, Calgary, Edmonton, Albuquerque, El Paso, Tucson and 2 more.
Which countries use MST, MST's zone?
MST is used in United States (Mountain), Canada (Alberta), Mexico (Chihuahua, Sonora).
Is there a day difference between MST and EST?
Not normally. The +2h gap only pushes the date over for late-evening times.
What is the time difference between MST and EST?
EST is +2h from MST.
What timezone is MST in?
MST operates on its local timezone.
What timezone is EST in?
EST operates on its local timezone.
Which countries use MST (Mountain Standard Time)?
MST is used in United States (Mountain), Canada (Alberta), Mexico (Chihuahua, Sonora).
Does MST observe daylight saving time?
Yes, MST switches to MDT during summer months.
What are some interesting facts about MST?
Arizona does not observe daylight saving time, staying on MST year-round. The Navajo Nation in Arizona does observe DST, unlike the rest of the state.
Which cities are in the EST timezone?
Major cities in the EST timezone include New York City, Washington D.C., Miami, Toronto, Philadelphia, Atlanta, Boston, Montreal.
What is the UTC offset for EST?
Eastern Standard Time (EST) is at UTC-05:00. During daylight saving time, it shifts to EDT.
What should I know about the EST timezone?
EST is the most widely used time zone in the United States by population. The New York Stock Exchange (NYSE) and NASDAQ operate on Eastern Time, opening at 9:30 AM EST.
When is it midnight in MST, what time is it in EST?
When it is 12:00 AM (midnight) in MST (MST), it is +2h later in EST (EST).
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See every conversion from MST →·See every conversion from EST →