Pacific Std Time.
I just wanted to make a post quoting this for its randomness.
Why didn't you choose 8 am to place the date barrier at Greenwich? Then, I might have found it a funny trolling attempt, as people start debating why the other half posts on the wrong date.
Edit: lol, nevermind, I think you're doing this quite well already. Saying "tomorrow" in UTC-8 at the evening, when it was already the 12th for the rest of the world...
Deadline: 2011-12-13 4:00 UTC
I'm trying to figure this out .. so the deadline is:
2011-12-12 8:00pm Pacific Std Time.
2011-12-12 11:00pm Eastern Time (my time zone)
2011-12-13 4:00am UTC
edit: wait isn't the deadline 1 hour b4 the time of prediction!?