Like other time zones, countries in the PST observe Daylight Saving Time, setting their clock one hour forward in summer. From Pacific Standard Time, they change it to Pacific Daylight Time (PDT) and reach UTC -7. Pacific Standard Time (PST) is UTC−08:00. It is used during the standard-time part of the year in Pacific-zone locations that still change clocks, including the U.S. West Coast and northern Baja California. Most of British Columbia no longer uses PST. What is PST? PST (Pacific Standard Time) is Pacific Standard Time (PST), which is used to determine the time zone and local time (PST) on the Pacific coast of the United States, Mexico, and Canada. 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 Standard Time (PST) is UTC−8, observed along the Pacific Coast of the United States and Canada in winter. From March to November, these regions switch to Pacific Daylight Time (PDT, UTC−7). PST is 3 hours behind Eastern Time (EST). Exact time now, time zone, time difference, sunrise/sunset time and key facts for Pacific Standard Time (PST). Check exact current time and discover the key facts about Pacific Standard Time. In the United States and Canada, the zone is generically called Pacific Time (PT) — specifically Pacific Standard Time (PST) during winter, and Pacific Daylight Time (PDT) during daylight saving time. The Pacific Time Zone (PT) is a time zone encompassing the western United States and northwestern Mexico. Places in this zone observe standard time by subtracting eight hours from Coordinated Universal Time (UTC−08:00). Historic, present and future dates for daylight saving time and clock changes. Time changes between years 2025 and 2029 in USA – Pacific are shown here.