Hey jaayjeee!
I hope this reply is not too late, but here is the link to the post of the launch time:
we tried our best to balance global time zones (and the finalized time turned out 4AM in China for us 
). I know waking up at 7 AM on Sunday is not the most pleasurable Aussie weekend plan, but hopefully, you’ll be able to secure an early bird by launch! Thank you for your understanding!