Here’s the schedule for main manga magazines I cover, use this as a guide and not a guarantee of spoiler/news release
Bessatsu Shonen Magazine (Attack On Titan): 4th – 6th every month
Jump SQ: 30th – 2nd every month.
Young Jump (Tokyo Ghoul): Every Saturday
Weekly Shonen Magazine (Fairy Tail): Every Friday/Saturday
Weekly Shonen Jump (One Piece, My Hero Academia): Every Thursday
Weekly Shonen Sunday (Magi): Every Friday