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Pacific Time Zone: Map

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The Pacific Time Zone observes standard time by subtracting eight hours from Coordinated Universal Time (UTC-8). The clock time in this zone is based on the mean solar time of the 120th meridian west of the Greenwich Observatorymarker. During daylight saving time, its time offset is UTC-7.

In the United Statesmarker and Canadamarker, this time zone is generically called Pacific Time (PT). Specifically, it is Pacific Standard Time (PST) when observing standard time (Winter), and Pacific Daylight Time (PDT) when observing daylight saving time (Summer). Canada follows United States daylight time. In Mexicomarker the UTC-8 time zone is known as the Northwest Zone, which formerly was synchronized with the U.S. PDT daylight saving schedule.

The zone is one hour ahead of the Alaska Time Zone, one hour behind the Mountain Time Zone and three hours behind the Eastern Time Zone.

United States

The following states or areas are part of the Pacific Time Zone:



Arizonamarker is in the Mountain Time Zone but does not observe daylight saving time (except in the Navajo Nation), so it is effectively on Pacific Daylight Time from mid-March to early November.

Canada

In Canadamarker, Pacific Time includes almost all of the province of British Columbiamarker (except for the Highway 95 corridor and portions around Fort St. Johnmarker, Dawson Creekmarker and Crestonmarker), all of Yukonmarker and Tungstenmarker, Northwest Territoriesmarker.

Mexico

In Mexicomarker, the state of Baja Californiamarker is completely within and the only part of Mexico in PST. Also the westernmost of the Revillagigedo Islandsmarker, Clarion Islandmarker (in the state of Colimamarker), observes PST.

Daylight time

During summer months, most of Arizonamarker, which is in the Mountain time zone but does not observe DST, is on the same time as neighboring states to the west which are on Pacific Daylight Time.

Through 2006, the local time (PST, UTC-8) changed to PDT (UTC-7) at 02:00 LST (local standard time) to 03:00 LDT (local daylight time) on the first Sunday in April, and returned at 02:00 LDT to 01:00 LST on the last Sunday in October.

Effective in the US in 2007, the local time changes from PST to PDT at 02:00 LST to 03:00 LDT are on the second Sunday in March and the time returns at 02:00 LDT to 01:00 LST on the first Sunday in November. In Mexico, the previous dates are still in effect.

Major cities

A rough estimate of the population of the entire time zone is 53 million (i.e., the populations of Washingtonmarker, Oregonmarker, Nevadamarker, Californiamarker, Baja Californiamarker, British Columbiamarker, and the Yukonmarker combined).

Over 1,000,000 residents

Over 700,000 residents

Over 400,000 residents

Over 200,000 residents

References



Sources




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