MST to PST
-1hMST
MSTSOURCEPST
PSTGreen rows indicate typical business hours (9 AM - 5 PM)
MST and PST on the World Map
The map below highlights the MST (Mountain Standard Time) and PST (Pacific 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.
PST – Pacific Standard Time
UTC-08:00Pacific Standard Time (PST) is the time zone for the US and Canadian Pacific coast, 8 hours behind UTC.
- •Silicon Valley and the world's biggest tech companies operate on Pacific Time.
- •The Hollywood film industry runs on PST/PDT.
- •PST is 3 hours behind EST, creating a significant business hours gap.
- •Vancouver, Canada's third-largest city, uses PST.
MST to PST Time Difference – Complete Guide
MST runs on Mountain Standard Time (MST) at UTC-07:00. PST runs on Pacific Standard Time (PST) at UTC-08:00. That puts MST 1 hour behind PST — a difference of -1h at the current offsets.
In practice, when it is 9:00 AM in MST it is 8:00 AM in PST. Midnight in MST is 11:00 PM in PST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
MST to PST time conversion table
| MST (MST) | PST (PST) | Day |
|---|---|---|
| 12:00 AM | 11:00 PM | previous day |
| 6:00 AM | 5:00 AM | same day |
| 7:00 AM | 6:00 AM | same day |
| 8:00 AM | 7:00 AM | same day |
| 9:00 AM | 8:00 AM | same day |
| 12:00 PM | 11:00 AM | same day |
| 3:00 PM | 2:00 PM | same day |
| 5:00 PM | 4:00 PM | same day |
| 6:00 PM | 5:00 PM | same day |
| 9:00 PM | 8:00 PM | same day |
Why people convert MST to PST time
- Scheduling a call from MST to PST: a 10:00 AM start in MST lands at 9:00 AM in PST, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both MST and PST are inside the 9-to-5 working day between 10:00 AM and 5:00 PM MST time (9:00 AM–4:00 PM PST). That is roughly 7 hours of usable overlap.
- Keeping family and friends in sync: knowing that 8:00 PM in MST is 7:00 PM in PST makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM MST" is unambiguous; "3 PM" across a -1h gap is not.
- Block 10:00 AM–5:00 PM MST as the recurring meeting window if you work primarily from MST and need PST 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 PST (Pacific Standard Time)
Pacific Standard Time (PST) covers the west coast of North America, including tech hubs like San Francisco and Seattle, and entertainment capital Los Angeles. The Pacific Time Zone is home to Silicon Valley and the world's largest technology companies. During summer, clocks advance to Pacific Daylight Time (PDT, UTC-07:00). PST is also observed in Baja California, Mexico.
Best time to call between MST and PST
Both MST and PST sit inside the 9 AM – 5 PM working day between 10:00 AM–5:00 PM MST, which is 9:00 AM–4:00 PM PST. That gives roughly 7 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
MST and PST share 7 hours of working-hours overlap (10:00 AM–5:00 PM MST), so scheduling a live meeting is straightforward.
MST is 1 hour behind PST (MST UTC-07:00 → PST UTC-08:00). The shared working window is 10:00 AM–5:00 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
PST
☀ Currently in DST
Standard: UTC-08:00 · DST: UTC-07:00
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 PST?
MST (MST, UTC-07:00) is 1 hour behind PST (PST, UTC-08:00). The gap is currently -1h.
How do I convert MST time to PST time?
Add -1h to MST local time. For example, 9:00 AM in MST is 8:00 AM in PST.
What time is it in PST right now?
PST uses PST at UTC-08:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -1h offset from MST.
What is the best time to call PST from MST?
Call between 10:00 AM and 5:00 PM MST — that maps to 9:00 AM–4:00 PM PST and keeps both parties inside the working day.
Which is behind, MST or PST?
MST is 1 hour behind PST. When it is 12:00 PM in MST it is 11:00 AM in PST.
Does daylight saving time affect the MST–PST difference?
Neither zone observes daylight saving time, so the -1h offset between MST and PST 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 PST?
Not normally. The -1h gap only pushes the date over the previous day.
What is the time difference between MST and PST?
PST is -1h from MST.
What timezone is MST in?
MST operates on its local timezone.
What timezone is PST in?
PST 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 PST timezone?
Major cities in the PST timezone include Los Angeles, San Francisco, Seattle, Vancouver, San Diego, Portland, Las Vegas, Sacramento.
What is the UTC offset for PST?
Pacific Standard Time (PST) is at UTC-08:00. During daylight saving time, it shifts to PDT.
What should I know about the PST timezone?
Silicon Valley and the world's biggest tech companies operate on Pacific Time. The Hollywood film industry runs on PST/PDT.
When is it midnight in MST, what time is it in PST?
When it is 12:00 AM (midnight) in MST (MST), it is -1h later in PST (PST).
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