PST can mean 2 different things depending on where you are: Pacific Standard Time (UTC-8); Philippine Standard Time (UTC+8). Each is explained below.
PST stands for Pacific Standard Time and is UTC-8, which is 8 hours behind UTC.
The same places switch to PDT (UTC-7) while daylight saving time is in effect.
Cities that use PST: Los Angeles, San Francisco, Seattle, San Diego, Portland, Las Vegas, Reno, Sacramento, Fresno, Spokane, San Jose, US, Tijuana, Oakland, Bakersfield and 2 more.
| When it is… | 9:00 AM PST | 12:00 PM PST | 5:00 PM PST |
|---|---|---|---|
| UTC | 5:00 PM | 8:00 PM | 1:00 AM (+1 day) |
| MST (Mountain) | 10:00 AM | 1:00 PM | 6:00 PM |
| CST (Central US) | 11:00 AM | 2:00 PM | 7:00 PM |
| EST (Eastern) | 12:00 PM | 3:00 PM | 8:00 PM |
| CET (Central Europe) | 6:00 PM | 9:00 PM | 2:00 AM (+1 day) |
| EET (Eastern Europe) | 7:00 PM | 10:00 PM | 3:00 AM (+1 day) |
| IST (India) | 10:30 PM | 1:30 AM (+1 day) | 6:30 AM (+1 day) |
| JST (Japan) | 2:00 AM (+1 day) | 5:00 AM (+1 day) | 10:00 AM (+1 day) |
| AEST (Sydney) | 3:00 AM (+1 day) | 6:00 AM (+1 day) | 11:00 AM (+1 day) |
PST stands for Philippine Standard Time and is UTC+8, which is 8 hours ahead of UTC.
The places that use PST do not change their clocks for daylight saving time, so the offset stays UTC+8 all year.
Cities that use PST: Manila, Cebu City, Davao City, Iloilo City, Cagayan de Oro, Quezon City.
| When it is… | 9:00 AM PST | 12:00 PM PST | 5:00 PM PST |
|---|---|---|---|
| UTC | 1:00 AM | 4:00 AM | 9:00 AM |
| PST (Pacific) | 5:00 PM (-1 day) | 8:00 PM (-1 day) | 1:00 AM |
| MST (Mountain) | 6:00 PM (-1 day) | 9:00 PM (-1 day) | 2:00 AM |
| CST (Central US) | 7:00 PM (-1 day) | 10:00 PM (-1 day) | 3:00 AM |
| EST (Eastern) | 8:00 PM (-1 day) | 11:00 PM (-1 day) | 4:00 AM |
| CET (Central Europe) | 2:00 AM | 5:00 AM | 10:00 AM |
| EET (Eastern Europe) | 3:00 AM | 6:00 AM | 11:00 AM |
| IST (India) | 6:30 AM | 9:30 AM | 2:30 PM |
| JST (Japan) | 10:00 AM | 1:00 PM | 6:00 PM |
| AEST (Sydney) | 11:00 AM | 2:00 PM | 7:00 PM |
PST can stand for Pacific Standard Time; Philippine Standard Time.
Pacific Standard Time is UTC-8. Philippine Standard Time is UTC+8.
PST is UTC-8 and PDT is UTC-7, a difference of 1 hour. Places that use both switch between them when daylight saving time starts and ends. The live line above shows which one applies right now.
It depends on context. Look at the place or the schedule the abbreviation comes from, or ask for the UTC offset to be written out, such as UTC+8 instead of CST.