FS time and airports

For the sense of realism I normally do all my GA flying for fun at my home airport in FS.. This creates a problem. The clock on fs is backwards Friday Harbor is on the west coast and I live on the east. When I load FS it uses my system time then when I move set my flight on the east coast it moves the clock ahead three hours. Is there something set wrong on my settings or better yet can you change your configure file to load your preffered airfield. I searched the configure file only finding the last airport you select in there. Thought maybe I was overlooking it. Thanks