The kick-off times of three Pompey games have been brought forward.
With matches continuing to be held behind closed doors, midweek clashes with Lincoln, Swindon and Oxford will now begin at 7pm.
The first of those contests takes place at Fratton Park on Tuesday, January 26, while the Blues go to the Kassam Stadium on Tuesday, February 23.
Swindon are scheduled to visit the south coast on Tuesday, February 9, although that will change if Pompey reach the fifth round of the FA Cup.