Unlike the first challenge, this one doesn't have a set schedule. Apparentely Bill has a busy schedule and they'll play whenever he can fit a session. Phil will probably announce each one in advance as soon as he can.
It sounded like he might even start another challenge while this one is in progress (ActionFreak)
Since this challenge is played on party, RIO guys dont have access to real time numbers on who's up. So, during streams, it'll be a "best guess" and they'll be posting the results after each session on
https://www.runitonce.eu/galfond-challenge/ once Phil provides them with the accurate numbers.
I can't edit the OP no longer so there it goes.