Come on, we're not a nation of atheists, even if some people here are!
Just a friendly reminder:
We are not a nation, but a global community. Mt. Gox is sitting in Japan, there are traders in Europa, Asia, Africa, Australia, and also some in the US.
15 GMT works fine: Most people in the US are already awake, while most people in Japan aren't already asleep. And of course it's also daytime in Europe. So for most people 15 GMT is at some point during the morning/day/evening, and only few people need to trade during the(ir) night.
In addition, it's Sunday, so many people don't need to work today (except for some middle-eastern countries, where Friday takes the role of our Sunday).
So I'd say that Sunday 15 GTM is one of the fairest solutions for everybody. If this doesn't work for you just don't go to church. Or buy a 3G SIM card and take your laptop with you.