This also baffles me. Here are the times converted to AEST:

  Sun July 5th
  3:25 PM -- Initial Power outage
  4:42 PM -- Instance launching in unaffected AZ's restored
  4:46 PM -- Power Restored
  6:00 PM -- 80% of instances recovered
  7:49 PM -- DNS recovered

  Mon July 6th
  1:00 AM -- Almost all instances recovered