PST vs MST Time Difference
Comparing Pacific Standard Time (PST) and Mountain Standard Time (MST). Live side-by-side clocks, interactive slider, and affected regions.
Switch Comparison Pair:
PSTPacific Standard Time
9:23:32 AM
Official civil atomic time
MSTMountain Standard Time
10:23:32 AM
Official civil atomic time
Direct Answer in Plain English
Pacific Standard Time (PST) is exactly 1 hour behind Mountain Standard Time (MST). When it is 12:00 PM MST in Denver, it is 11:00 AM PST in Los Angeles.
Offset: 1 hour(s) difference
Interactive Time Difference Slider
Slide to instantly convert matching hours between both timezones.
12:00 PM (PST) = 1:00 PM (MST)
12 AM4 AM8 AM12 PM (Noon)4 PM8 PM11 PM
PST12:00 PM
MST1:00 PM
Key Cities & States in PST:
California (Los Angeles, SF)Washington (Seattle)Oregon (Portland)Nevada (Las Vegas)British Columbia (Vancouver)
Key Cities & States in MST:
Colorado (Denver)Utah (Salt Lake City)Arizona (Phoenix - No DST)New Mexico (Albuquerque)Alberta (Calgary)
Difference Between PST and MST in Plain English
Pacific Time covers the US West Coast, while Mountain Time covers the Rocky Mountain corridor. Mountain Time is always 1 hour ahead of Pacific Time (with the special exception of Arizona, which does not observe Daylight Saving Time and stays on Mountain Standard Time year-round).
Daylight Saving Time (DST) Transitions
Except for most of Arizona, both zones change clocks together in March and November. When active, they become PDT (UTC-7) and MDT (UTC-6).
Frequently Asked Questions About PST vs MST
Everything you need to know about comparing PST and MST.
Google SERP Verified
Pacific Standard Time (PST) is exactly 1 hour behind Mountain Standard Time (MST). When it is 12:00 PM MST in Denver, it is 11:00 AM PST in Los Angeles.
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