Information about Pacific Daylight Time

PST is UTC-8, highlighted in red.

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 degree meridian west of the Greenwich Observatory. During daylight saving time, its time offset is UTC-7. Coordinated Universal Time is also called Greenwich Mean Time (GMT).

In the United States and Canada, 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).

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.

In the United States, the states of Washington and California are located entirely within the Pacific Time Zone. Nearly all of Nevada, except for the towns of West Wendover and Jackpot, is on Pacific Time. Additionally, the northern part of Idaho (the Idaho Panhandle) and all of Oregon except for the greater part of Malheur County are also in the zone. The exact specification for the location of time zones and the dividing line between zones is set forth in the Code of Federal Regulations at 49 CFR 71.^[1]

In Canada, PST includes almost all of the province of British Columbia (except for the Highway 95 corridor and portions around Fort St. John), all of the Yukon Territory and Tungsten, Northwest Territories.

In Mexico, the state of Baja California is wholly within and the only part of Mexico in PST.

Most of the Pacific Time zone observes Pacific Daylight Time (PDT, UTC-7) during the summer months, with the exception of the areas surrounding Dawson Creek and Creston in British Columbia.

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

Major cities

Over 1,000,000 residents

Over 700,000 residents

Over 400,000 residents

Over 200,000 residents

• • [ e] Time zones in North America

Time Zone	UTC-10	UTC-9	UTC-8	UTC-7	UTC-6	UTC-5	UTC-4		UTC-3
Name	Hawaii-Aleutian Standard	Alaska Standard Hawaii-Aleutian Daylight	Pacific Standard Alaska Daylight	Mountain Standard Pacific Daylight	Central Standard Mountain Daylight	Eastern Standard Central Daylight	Atlantic Standard Eastern Daylight	Newfoundland Standard	Atlantic Daylight	Newfoundland Daylight

References

1. ^ The specification for the Pacific Time Zone is set forth at 49 CFR 71.10, and is listed in Text and pdf formats.
The boundary between Pacific and Mountain is set forth at 49 CFR 71.9, and is listed in text and pdf formats.

Sources

Standard time is the result of synchronizing clocks in different geographical locations within a time zone to the same time rather than using the local meridian as in local mean time or solar time. The time so set has come to be defined in terms of offsets from Universal Time.
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UTC−8 is a band of timezones separated from the Universal Coordinated Time by 8 hours.

Timezones

Pacific Standard Time
Alaska Daylight Time
Clipperton Island Standard Time

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Solar times are measures of the apparent position of the Sun on the celestial sphere. They are not actually the physical time, but rather hour angles, that is, angles expressed in time units.
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meridian (or line of longitude) is an imaginary arc on the Earth's surface from the North Pole to the South Pole that connects all locations with a given longitude. The position of a point on the meridan is given by the latitude.
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Royal Observatory, Greenwich (formerly the Royal Greenwich Observatory or RGO) was commissioned in 1675 by King Charles II, with the foundation stone being laid on 10 August.
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Daylight saving time (DST; also summer time in British English) is the convention of advancing clocks so that afternoons have more daylight and mornings have less.
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A time offset is defined by international convention as a number of hours and minutes from Coordinated Universal Time in Greenwich, England. Many time zones employ two time offsets, one for standard time and one for daylight saving time.
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UTC−7 can be observed in:

Mountain Standard Time Zone
Pacific Daylight Time Zone
Canada
The portion of the Peace River Valley in British Columbia.

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Motto
"In God We Trust" (since 1956)
"E Pluribus Unum" ("From Many, One"; Latin, traditional)
Anthem
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Protection is not an endorsement of the current [ version] ([ protection log]).
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Winter is one of the four seasons of temperate zones. Almost all English-language calendars, going by astronomy, state that winter begins on the winter solstice, and ends on the spring equinox.
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Summer is one of the four seasons of the year. In the West, the seasons are generally considered to start at the equies and solstices, based on astronomical reckoning. In English-language calendars, based on astronomy, summer begins on the day of the summer solstice and ends on the
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The Alaska Time Zone observes standard time by subtracting nine hours from Coordinated Universal Time (UTC-9). During daylight saving time its time offset is only eight hours (UTC-8).
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The Mountain Time Zone of North America keeps time by subtracting seven hours from Coordinated Universal Time (UTC-7) during the shortest days of autumn and winter, and by subtracting six hours during daylight saving time in the spring, summer, and early autumn (UTC-6).
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Eastern Time Zone (ET) of the Western Hemisphere falls mostly along the east coast of Northern America and the west coast of South America. Its time offset is UTC-5 during standard time and UTC-4 during daylight saving time.
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Motto
"In God We Trust" (since 1956)
"E Pluribus Unum" ("From Many, One"; Latin, traditional)
Anthem
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State of Nevada

Flag of Nevada Seal
''Nickname(s): Silver State (official), Sagebrush State,
Battle Born State''
Motto(s): All For Our Country

Official language(s) English

Capital Carson City

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West Wendover, Nevada

Seal
Motto:
Location of West Wendover, Nevada
Coordinates:
Country United States
State Nevada
Area
- City 7.
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Jackpot, Nevada is an unincorporated town in Elko County. Located less than 1 mile (1.6 kilometers) from the Idaho border on U.S. Highway 93, Jackpot has been a popular casino gaming destination for residents of Idaho and other neighboring states since its founding.
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State of Idaho

Flag of Idaho Seal
Nickname(s): Gem State, Spud State
Motto(s): Esto perpetua

Official language(s) English [1]

Capital Boise
Largest city Boise

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The Idaho Panhandle is the northern region of the U.S. State of Idaho that encompasses the ten northernmost counties of Benewah, Bonner, Boundary, Clearwater, Idaho, Kootenai, Latah, Lewis, Nez Perce, Shoshone.
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State of Oregon

Flag of Oregon (front) Seal
Nickname(s): Beaver State
Motto(s): Alis volat propriis

Official language(s) (none)^[1]

Capital Salem
Largest city Portland

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Malheur County (IPA: [mæl'hiɹ]) is a county located in the southeast corner of the U.S. state of Oregon. The county was named for Malheur River, which flows through it. As of 2000, the population is 31,615.
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time zone is a region of the Earth that has adopted the same standard time, usually referred to as the local time. Most adjacent time zones are exactly one hour apart, and by convention compute their local time as an offset from UTC (see also Greenwich Mean Time).
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The Code of Federal Regulations (CFR) is the codification of the general and permanent rules and regulations (sometimes called administrative law) published in the Federal Register by the executive departments and agencies of the Federal Government of the United States.
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British Columbia
Colombie-Britannique

Flag Coat of arms
Motto: Splendor Sine Occasu (Latin: Splendour Without Sunset (diminishment))

Capital Victoria
Largest city Vancouver
Official languages English
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Highway 95

British Columbia provincial highways
< Hwy 93

Highway 95, the Columbia Highway, is a north-south highway in the southeastern corner of the province, opened in 1957. The highway connects with U.S.
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