On Tuesdays (as in every Tuesday), is there an expression for that?

On Tuesdays (indicating every Tuesday) → le madi
On Sundays → le dimanch
On Thursdays → le jedi

I visit my mon on Fridays.
Mwen vizite manman m le vandredi.

On Saturdays you won't find him because he's gone to party.
Le samdi ou pap jwenn li paske l'al banboche.

I can only help you on Mondays and Wednesdays.
Mwen la sèlman ede w le lendi ak mèkredi.

I see them on Sunday afternoons.
Mwen wè yo le dimanch apremidi.