Yarra, no. It's EST in America. You can check that here:http://wwp.greenwichmeantime.com/time-z ... tern-time/
Bookmark it and you'll always know.
For us Aussies, if you've finished daylight saving, I think the Challenge closes at around midnight on Thursday/Friday. When Daylight Saving is on for us and off in the US, it's 2 Friday morning here. Then we have about two weeks when the US is off daylight saving and we're still on it (at least here in Sydney). When that happens, it's around 1 am Friday morning.
I don't wait up to check for final entries.