Pacific time, I'm pretty sure. I live on the West Coast of the USA and the time here matches the time on the site.
Time Zone for chess.com

An old post, so you probably have already figured it out. But if you go to your "edit profile", about halfway down, you will find timezone. It defaults to Greenwich mean time -7 hours, which is US Pacific time. Im Eastern (new york) time zone so I'm gmt-4 hours. If you change it to your local time, when you get messages regarding tournaments, etc. it will convert to your local time. Don't forget to hit "save updates at the bottom!!
I am probably missing it somewhere, but I cannot find the time zone for the Site. Chess.com has things about time in lots of places, and the time zone was not listed. I have done a cursory look, but cannot find the time zone for the www.chess.com website. Does anyone know?
Thanks,
Bill