For the sake of the show, I'd say Monday because if you're planning on doing the first ep saturday at 6 pm est, then the party at 9 pm est, I don't think there would be enough time for people to catch-up/no down time and itll be like everyone just jumping into the main event, which would give the new people no chance to really get to know anybody (SINCE MOST YALL JUST RP WITH THE SAME TWATS EVERY SCENE ANYWAY AND CLING ONTO THE SAME 2 PEOPLE)!
But i prefer Saturday because I work Monday 9-5 and I can never stay awake after I get home but I'll try !