Which states are on Pacific Time?
Two states sit entirely inside the zone: California and Washington. Three more split themselves between Pacific Time and a neighbor.
California holds roughly 39 million people. Washington adds another 7.7 million. Every county in both states follows the same clock, from the Oregon line to the Mexican border on the coast, and from the Pacific shore to the eastern edges of the Sierra Nevada and the Cascade Range.
Three states straddle the boundary.
Oregon. Most of Oregon is on Pacific Time. The exception is the bulk of Malheur County, which runs on Mountain Time. Malheur’s ranching and farming economy ties it to neighboring Idaho, not to Portland or the Willamette Valley. The boundary follows the county line.
Nevada. Nearly all of Nevada is on Pacific Time. The outlier is West Wendover, a small town on the Utah border. West Wendover uses Mountain Time to stay aligned with its casino and hospitality economy, which pulls customers from Salt Lake City. The rest of the state, including Las Vegas, Reno, and Carson City, stays on Pacific Time.
Idaho. The northern panhandle runs on Pacific Time. Coeur d’Alene, Moscow, and Sandpoint sit in this slice, north of the Salmon River. The rest of Idaho, including Boise, uses Mountain Time. The split follows the Salmon River roughly and reflects the pull of Spokane, Washington, on the northern counties. Interstate 90 connects Coeur d’Alene directly to Spokane, and the two cities share a media market and commuting pattern.
For a full breakdown of every state with counties in two zones, see States Split Between Time Zones.
Major cities on Pacific Time
The zone contains some of the largest population centers in the country.
- Los Angeles, California
- San Diego, California
- San Jose, California
- San Francisco, California
- Seattle, Washington
- Portland, Oregon
- Las Vegas, Nevada
- Sacramento, California
- Fresno, California
- Long Beach, California
- Oakland, California
- Spokane, Washington
- Tacoma, Washington
Las Vegas is often assumed to be on Mountain Time because it sits close to Arizona and Utah. It is not. Las Vegas is on Pacific Time, the same clock as Los Angeles. The Nevada state line west of St. George, Utah, marks the boundary between Pacific and Mountain.
How many hours behind Eastern Time is the West Coast?
Three hours. Every day of the year. Both zones shift their clocks on the same dates, so noon in Los Angeles is always 3:00 p.m. in New York and 2:00 p.m. in Chicago.
This stability does not hold everywhere. The distance from the West Coast to Honolulu changes with the seasons because Hawaii skips daylight saving. The distance to Phoenix changes too: Arizona matches Pacific Time exactly from March to November, then jumps an hour ahead for the winter.
Pacific Time is three hours behind the East Coast, two hours behind Chicago, and one hour behind Denver. For a full explanation of all four mainland zones, see US Time Zones Explained.
| Comparison | Pacific Time | Eastern Time |
|---|---|---|
| Standard time (winter) | UTC-8 | UTC-5 |
| Daylight time (summer) | UTC-7 | UTC-4 |
| Gap | 3 hours | , |
| Example: noon PT | 3:00 p.m. ET | , |
| Example: 5:00 p.m. ET | 2:00 p.m. PT | , |
When does Pacific Time switch between PST and PDT?
The switch happens on the second Sunday of March, when clocks jump forward, and reverses on the first Sunday of November. Those dates match every other US zone that observes daylight saving.
The generic label “PT” works all year. If you write “PST” in July, you are claiming an offset the West Coast is not using, and any calendar system that converts it literally will place your meeting an hour off. When a document must be unambiguous, write the UTC offset: “3:00 p.m. PT (UTC-7)” or “3:00 p.m. PT (UTC-8)” depending on the season.
How the three-hour gap shapes the business day
The New York Stock Exchange opens at 9:30 a.m. Eastern, which is 6:30 a.m. Pacific. Anyone in finance on the West Coast starts hours before a conventional office. The NASDAQ closes at 4:00 p.m. Eastern, which is 1:00 p.m. Pacific. The trading day ends before lunch on the coast. For a detailed breakdown of market hours across all zones, see US Stock Market Hours in Every Time Zone.
National conference calls scheduled for East Coast convenience land at breakfast time out west. A 10:00 a.m. Eastern call is 7:00 a.m. Pacific. A 4:00 p.m. Eastern call is 1:00 p.m. Pacific. The practical shared window for a call that works for both coasts is noon to 5:00 p.m. Eastern, which is 9:00 a.m. to 2:00 p.m. Pacific. See Calling Across US Time Zones for the best times to reach each zone.
The tech industry, concentrated in the San Francisco Bay Area and Seattle, often runs on flexible schedules. Core hours may be 10:00 a.m. to 4:00 p.m. Pacific, but references in documentation and engineering standups are frequently given in Pacific Time regardless of where remote team members sit. A distributed team with members in New York, London, and Bangalore will find that the Pacific Time reference point forces early starts in New York and late nights in Europe and Asia.