Pacific Time Zone

From Wikipedia, the free encyclopedia
  (Redirected from Pacific Time)
Jump to: navigation, search
This article is about the time zone with daylight change in North America. For the static time zones, see UTC−08:00 and UTC−07:00. For the radio show, see Pacific Time (radio show). For the art exhibition, see Pacific Standard Time: Art in L.A., 1945-1980.
Pacific Time Zone
  Pacific Time Zone
UTC offset
PST UTC−8:00
PDT UTC−7:00
Current time (Refresh the clock.)
PST 11:06 am on 25 Nov 2015
Observance of DST
DST is observed throughout this time zone between the 2nd Sunday in March and the 1st Sunday in November.
DST ended 1 Nov 2015
DST begins 13 Mar 2016

The Pacific Time Zone observes standard time by subtracting eight hours from Coordinated Universal Time (UTC−8). The standard time in this zone is based on the mean solar time of the 120th meridian west of the Greenwich Observatory. During daylight saving time, its time offset is UTC−7 and is thus based on the mean solar time of the 105th meridian west of the Greenwich Observatory.

In the United States and Canada, this time zone is generically called the Pacific Time Zone (PT). Specifically, it uses Pacific Standard Time (PST) when observing standard time (late autumn to early spring), and Pacific Daylight Time (PDT) when observing daylight saving time (early spring to late autumn). Most of Canada uses daylight saving time. In Mexico the UTC−8 time zone is known as the Northwest Zone, which is synchronized with the U.S. PDT daylight saving schedule.

The largest city in the Pacific Time Zone is Los Angeles, California; the city's metropolitan area is the largest in the zone.

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

United States[edit]

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

The town of Hyder, Alaska, is officially in the Alaska Time Zone. However, most of the town observes the Pacific Time because of strong connections with nearby Stewart, British Columbia, which is in the Pacific Time Zone. The United States Post Office in Hyder strictly adheres to Alaska Time.


Main article: Time in Canada

In Canada, the Pacific Time Zone includes most of British Columbia (except for the Highway 95 corridor and portions around Tumbler Ridge, Fort St. John, Dawson Creek, Golden and Creston), all of Yukon and Tungsten, Northwest Territories.


Main article: Time in Mexico

In Mexico, the state of Baja California lies completely within the Pacific Time Zone.

Daylight time[edit]

Through 2006, the local time (PST, UTC−8) changed to daylight time (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 U.S. in 2007 as a result of the Energy Policy Act of 2005, the local time changes from PST to PDT at 02:00 LST to 03:00 LDT on the second Sunday in March and the time returns at 02:00 LDT to 01:00 LST on the first Sunday in November. The Canadian provinces and territories that use daylight time each adopted these dates between October 2005 and February 2007. In Mexico, beginning in 2010, the portion of the country in this time zone uses the extended dates, as do some other parts. The vast majority of Mexico, however, still uses the old dates.

See also[edit]