ਪੈਸਿਫਿਕ ਸਮਾਂ (Paisiphk Samaan)
However, it's important to note that the concept of time zones might not be as familiar in some Punjabi-speaking communities. It would be more common to specify the location where "Pacific Time" is used, for example:
ਕੈਲੀਫੋਰਨੀਆ ਵਾਲਾ ਸਮਾਂ (Kaliforniya wala samaan) (California time)
Or, to be more specific:
ਲੋਸ ਏਂਜਲਸ ਵਾਲਾ ਸਮਾਂ (Los Angeles wala samaan) (Los Angeles time)
This way, the Punjabi speaker will understand the context and the specific time zone being referred to.