Is today my last day to grind for Underboss?

About a week ago picked the game up after a few years away. Saw it was a week from the season end. Went through all of the Manhunt steps and am now running the nightclub to get Underboss, but will this mission go away when the season is over? I don't remember if manhunts were even a thing last time I played so I don't know if they're season exclusive.