Than the next day, Sunday, sounds like it might be best.
If we change that Saturday chat time plan into Sunday, then it will be Monday AM 6:00 and 8:00 for our Aussie friends, and 5:00 for Philippines (Jiro). I don't think anyone would want wake up 5:00 AM Monday for a group hatch?
The biggest problem in here is that the time difference between USA West Coast and East Australia is 18 hours, and no matter how we choose it, either of these parts is going to have either really early morning or late evening.
Like, if we change this that USA PST has AM 8:00 at the time of hatch, it's 2:00 AM next day in East Australia. And if East Australia it's 8:00 AM, it's 2:00 PM in USA PST (as we had in previous GH).
We need to find a solution to this problem.