Timezone conversion
PST to PDT Time — Convert Pacific Standard Time (US) to Pacific Daylight Time (US)
PST and PDT both refer to the America/Los_Angeles zone, so there is nothing to convert between them — a clock in that zone shows one time. What differs is what each name describes, not the time it shows.
PST and PDT are two names for the same time zone.
Abbreviation disambiguation
On Clockjumper, PST refers to Pacific Standard Time in the United States (UTC−8). The US West Coast observes PST in winter and switches to PDT (UTC−7) during daylight saving time.
Why there is nothing to convert
PST and PDT both resolve to the America/Los_Angeles zone, so any clock change applies to both at the same moment. Where the names differ is in what they describe — an umbrella zone versus one of its seasonal forms, a city versus the zone it sits in, or two labels for the same offset. The disambiguation notes above spell out which applies here.
Frequently asked questions
- Is PST the same as PDT?
- They refer to the same time zone (America/Los_Angeles), so a clock shows one time for both and there is nothing to convert. The names are not interchangeable in meaning, though — see below.
- Then what is the difference between PST and PDT?
- The difference is in what each name describes rather than what time it shows. One may be an umbrella name for the zone while the other names only its winter or summer form; seasonal forms such as EST and EDT sit one hour apart as offsets but never apply at the same moment. The disambiguation notes on this page say which case this pair is.
- What time zone does PST refer to?
- PST refers to Pacific Standard Time (US) (IANA: America/Los_Angeles).
- What time zone does PDT refer to?
- PDT refers to Pacific Daylight Time (US) (IANA: America/Los_Angeles).
- Is PST on this page the same as other zones that share the letters "PST"?
- On Clockjumper, PST refers to Pacific Standard Time in the United States (UTC−8). The US West Coast observes PST in winter and switches to PDT (UTC−7) during daylight saving time.