2024 College Football Transfer Portal: Latest moves, when it officially opens
The NCAA has changed rules regarding when players can enter the transfer portal. The college football transfer portal window will begin Dec. 4.
247sports.com
I found this useful
Allen being fired opens up a 30 day window for all IU players
Regular Portal for winter 12/4/23 to 1/3/24
Playoff/Late Bowl date players portal closes mid January
Spring Portal May 1-15
