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What Is Pacific Standard Time?
It covers all or parts of five states in the US and two provinces or territories in Canada.
The PST time zone is the third most populated time zone in the US. It spans from Canada to Mexico.
In North America, Pacific Standard Time shares a border with Mountain Standard Time (MST) in the east.
Pacific Standard Time Zone
Pacific Standard Time (PST) is a standard time zone in use from the first Sunday in November to the second Sunday in March—when Daylight Saving Time (DST) is not in effect. Pacific Daylight Time (PDT) is used during the remainder of the year.
PST Is the Pacific Time Zone
In everyday usage, PST is often referred to as Pacific Time (PT) or the Pacific Time Zone. This can add a bit of confusion as the term Pacific Time does not differentiate between standard time and Daylight Saving Time, so Pacific Time switches between PST and PDT in areas that use DST during part of the year.
Converting Pacific Standard Time to Other US Time Zones
- Pacific Standard Time (PST) is 3 hours behind Eastern Standard Time (EST).
To convert PST to EST, you have to add three hours.
- Pacific Standard Time (PST) is 2 hours behind Central Standard Time (CST).
To convert PST to CST, you have to add two hours.
- Pacific Standard Time (PST) is 1 hour behind Mountain Standard Time (MST).
To convert PST to MST, you have to add one hour.
Where and When is PST Observed?
U.S. states using PST in the winter and PDT in the summer:
- Idaho - western counties
Benewah, Bonner, Boundary, Clearwater, Kootenai, Latah, Lewis, Nez Perce, Shoshone and north part of Idaho
- Oregon - except most of Malheur county
Canadian provinces/territories using PST in the winter and PDT in the summer:
- British Columbia - except for some eastern communities
Mexican states using PST in the winter and PDT in the summer:
Other Time Zones in UTC -8
Some time zones exist that have the same offset as PST, but can be found under a different name:
Time zones by continent/region
- Central America
- Indian Ocean
- North America
- South America