Day of the week?

Not out of the box. You’d need some custom coding.

I am not sure if this will do precisely what you want, but this s2Member KB article about Content Dripping may be useful:
https://s2member.com/kb-article/s2drip-shortcode/

Did you check this hack?
https://krumch.com/2013/07/20/kc-s2member-ccap-repeatable-playlist/

With the mention of Day 1, Day 2, etc. maybe that will work? Worth checking.