It's hard to get a good time to cover Oceana, US and Europe, but if we do:
10:00pm UTC on a Friday, that's
5:00PM EST
9:00AM Saturday Australia
Then people could join as they are available for a few hours. I would be at work for at least the first couple of hours, and it would be tough on the West-Coasters for the same reason, but by two or three hours in it might work.