19:30 PST what time is it in Greece

It is currently:
Seattle* Wed 10:59 AM (PDT)
and
Athens* Wed 8:59 PM (Greece)
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Therefore; Greece is 10 hours 'ahead' of Pacific Daylight Savings Time
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Thus:
19:30 PDT will be 05:30 (next morning) in Greece!
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I hope this is helpful.
P.S. You can use the referenced website to determine the local time around the world.

http://24timezones.com/