Don't worry,
Menel, it wasn't you...I think I somehow got the difference between Pacific time & EST mixed up with the difference between EST and GMT, calculated from GMT and added an hour for daylight saving - or something equally convoluted. This might make more sense considering I may have been on my 3rd glass of "hard Gollum juice"* when I read about it.
*Honey, lemon, ginger & vodka, on the rocks.