How many hours is UTC ahead of PST?
As abbreviations, PST is always 8 hours behind of UTC: UTC is UTC+0 and PST is UTC−8. To convert, subtract 8 hours.
Check which label you actually need: PST (Pacific Time is on PDT today). A time written with an abbreviation that is not in use is usually meant as the local time, so convert between the places instead: right now PST is 7 hours behind of UTC.
When the UTC to PST time difference changes
For most of the year PST is 7 hours behind of UTC. From 1 November to 31 December 2026, PST is 8 hours behind of UTC instead, because the two places change their clocks on different dates. Meetings booked by the usual gap land an hour off in those weeks.
| Dates | PST vs UTC | Length |
|---|---|---|
| 8 March 2026 to 31 October 2026 | 7 hours behind | 238 days |
| 1 November 2026 to 31 December 2026 | 8 hours behind | 61 days |
| 1 January 2027 to 13 March 2027 | 8 hours behind | 72 days |
| 14 March 2027 to 6 November 2027 | 7 hours behind | 238 days |
| 7 November 2027 to 31 December 2027 | 8 hours behind | 55 days |
Best time for a meeting between UTC and PST
- When PST is 7 hours behind of UTC: 1 shared office hour, 16:00 to 17:00 in UTC (09:00 to 10:00 in PST).
- When PST is 8 hours behind of UTC: no shared 09:00 to 17:00 hours; try 17:00 in UTC (09:00 in PST).