It looks like starting this Sunday, October 7th, 2012. Winx Club Season 5 will now be airing at 1PM EST/12 NOON C! NOT 12 NOON EST/11AM C.This had been confirmed by the Official Winx Club Facebook:
Link: http://www.facebook.com/WinxClubLet all the USA Fans know! =D DON'T MISS THE BRAND NEW EPISODES!!
Nick still hadn't update their schedule (the banner and listing) yet. (They will soon since the Official Winx Club Facebook announced it)