Since I dread having to get up at 6 tomorrow to make sure that my code worked, I kind of agree. But we don't want to make it west-coast centric either. So perhaps 10 AM Eastern? Or 11 at the latest.
Edit: I updated the OP to say 11 AM. What swayed me was remembering all the times that problems with a whoishiring post stuck around for hours before one of us western types could fix it. This will make that less likely.
(I know not everyone is in the US, but there's no denying that the SF Bay Area contains a huge proportion of this site's audience.)