Nitpicky, but I'm pretty sure you meant PDT, not PST. Daylight Savings Time started already.
If you mean to just say Pacific Time, the proper abbreviation is PT. That's valid year round, and people who don't observer DST, or observe it on a different schedule, must do their own calculations.
As I type this, it's a couple minutes before 8, PDT & PT. But it's a couple minutes before 7, PST.