Team Fortress 2 Question

I pre ordered the orange box today...i've pre loaded team fortress 2 for the beta...and i know it comes out tomorrow september 17th but does anyone know the exact time? I was thinking like midnight but does anyone know for sure?

yeah, I'm praying that it happens at midnight, but more then likely not. It's Valve we're talking about after all!

And even if it did come out at midnight, there is no telling which Timezone they would do it on.