Town’s home game against Blackburn Rovers scheduled for Saturday 20th February will be rearranged with the Lancastrians progressing to round five of the FA Cup after winning 3-0 at Oxford United this afternoon.
Fifth round ties are set to be played that weekend and Rovers' visit to Suffolk will move to a Tuesday evening, although not in the following week as Hull City are already at Portman Road.
Elsewhere, Blues boss Mick McCarthy was at the Madejski Stadium to watch Tuesday’s opponents Reading beat Walsall 4-0, having made only two changes from their last Championship game, to seal their place in round five. Tuesday's game was moved from today due to the Royals' involvement in the FA Cup.
Town will be out to extend their remarkable record of Tuesday night home victories to 16 when they take on Reading and then increase their total even further when they eventually face Blackburn.
The Blues' next Saturday home game - one of only four more this season - is now Nottingham Forest's visit on March 5th.
Meanwhile, in the Championship, in which there were only three games today, the Blues remain eighth but with Birmingham (47 points) having moved up to sixth ahead of Sheffield Wednesday (46) after drawing 0-0 at Bristol City.
The Owls, who lost 3-2 at Shrewsbury in the FA Cup this afternoon with the winning goal coming deep into injury time, are in action at home to third-placed Burnley (51) on Tuesday.
Ninth-placed Cardiff City (44) are now only a point behind the Blues (45) having won 3-2 away at Huddersfield Town.