PST to MST
+1hPST
PSTSOURCEMST
MSTGreen rows indicate typical business hours (9 AM - 5 PM)
PST and MST on the World Map
The map below highlights the PST (Pacific Standard Time) and MST (Mountain Standard Time) timezone regions across the globe.
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 – 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.
Everything You Need to Know About PST and MST Time
PST runs on Pacific Standard Time (PST) at UTC-08:00. MST runs on Mountain Standard Time (MST) at UTC-07:00. That puts PST 1 hour ahead of MST — a difference of +1h at the current offsets.
In practice, when it is 9:00 AM in PST it is 10:00 AM in MST. Midnight in PST is 1:00 AM in MST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
PST to MST time conversion table
| PST (PST) | MST (MST) | Day |
|---|---|---|
| 12:00 AM | 1:00 AM | same day |
| 6:00 AM | 7:00 AM | same day |
| 7:00 AM | 8:00 AM | same day |
| 8:00 AM | 9:00 AM | same day |
| 9:00 AM | 10:00 AM | same day |
| 12:00 PM | 1:00 PM | same day |
| 3:00 PM | 4:00 PM | same day |
| 5:00 PM | 6:00 PM | same day |
| 6:00 PM | 7:00 PM | same day |
| 9:00 PM | 10:00 PM | same day |
Why people convert PST to MST time
- Scheduling a call from PST to MST: a 10:00 AM start in PST lands at 11:00 AM in MST, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both PST and MST are inside the 9-to-5 working day between 9:00 AM and 4:00 PM PST time (10:00 AM–5:00 PM MST). That is roughly 7 hours of usable overlap.
- Watching a live event or market open: PST viewers need 10:00 AM in MST to catch a 9:00 AM start there, and 11:00 PM if the event is anchored to PST.
- Always state the zone abbreviation, not just the hour. "3:00 PM PST" is unambiguous; "3 PM" across a +1h gap is not.
- Block 9:00 AM–4:00 PM PST as the recurring meeting window if you work primarily from PST and need MST colleagues present.
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.
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).
Best time to call between PST and MST
Both PST and MST sit inside the 9 AM – 5 PM working day between 9:00 AM–4:00 PM PST, which is 10:00 AM–5:00 PM MST. That gives roughly 7 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
PST and MST share 7 hours of working-hours overlap (9:00 AM–4:00 PM PST), so scheduling a live meeting is straightforward.
PST is 1 hour ahead of MST (PST UTC-08:00 → MST UTC-07:00). The shared working window is 9:00 AM–4:00 PM PST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
PST
☀ Currently in DST
Standard: UTC-08:00 · DST: UTC-07:00
Clocks fall back on Sun, Nov 1, 2026
MST
☀ Currently in DST
Standard: UTC-07:00 · DST: UTC-06:00
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 PST and MST?
PST (PST, UTC-08:00) is 1 hour ahead of MST (MST, UTC-07:00). The gap is currently +1h.
How do I convert PST time to MST time?
Add +1h to PST local time. For example, 9:00 AM in PST is 10:00 AM in MST.
What time is it in MST right now?
MST uses MST at UTC-07:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +1h offset from PST.
What is the best time to call MST from PST?
Call between 9:00 AM and 4:00 PM PST — that maps to 10:00 AM–5:00 PM MST and keeps both parties inside the working day.
Which is ahead, PST or MST?
PST is 1 hour ahead of MST. When it is 12:00 PM in PST it is 1:00 PM in MST.
Does daylight saving time affect the PST–MST difference?
Neither zone observes daylight saving time, so the +1h offset between PST and MST is fixed all year.
Which other cities share PST's time zone?
PST also covers Los Angeles, San Francisco, Seattle, Vancouver, San Diego, Portland, Las Vegas, Sacramento and 2 more.
Which countries use PST, PST's zone?
PST is used in United States (Pacific), Canada (British Columbia), Mexico (Baja California).
Is there a day difference between PST and MST?
Not normally. The +1h gap only pushes the date over for late-evening times.
What is the time difference between PST and MST?
MST is +1h from PST.
What timezone is PST in?
PST operates on its local timezone.
What timezone is MST in?
MST operates on its local timezone.
Which countries use PST (Pacific Standard Time)?
PST is used in United States (Pacific), Canada (British Columbia), Mexico (Baja California).
Does PST observe daylight saving time?
Yes, PST switches to PDT during summer months.
What are some interesting facts about PST?
Silicon Valley and the world's biggest tech companies operate on Pacific Time. The Hollywood film industry runs on PST/PDT.
Which cities are in the MST timezone?
Major cities in the MST timezone include Denver, Phoenix, Salt Lake City, Calgary, Edmonton, Albuquerque, El Paso, Tucson.
What is the UTC offset for MST?
Mountain Standard Time (MST) is at UTC-07:00. During daylight saving time, it shifts to MDT.
What should I know about the MST timezone?
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.
When is it midnight in PST, what time is it in MST?
When it is 12:00 AM (midnight) in PST (PST), it is +1h later in MST (MST).
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See every conversion from PST →·See every conversion from MST →