The following countries or regions use Pacific Standard Time (PST, UTC−8) and switch to Pacific Daylight Time (PDT, UTC−7) during daylight saving time:
United States (California, Washington, Oregon, Nevada)
Canada (British Columbia, Yukon)
Mexico (Baja California)
French Polynesia (Gambier Islands - no DST)
Pitcairn Islands (no DST)
Note: Only parts of these countries/territories use PST/PDT. U.S. and Canada observe DST. Pacific Islands may not observe DST.