The game scheduled to be played at Selhurst Park on Tuesday night (3rd February) has been postponed because of the adverse weather conditions which has affected the whole of Britain.
A new date for the game has already been arranged for the Championship clash and it will now take place on Saturday, 14th February should Nottingham Forest progress to the 5th Round of the FA Cup.
Forest are set to play Derby in a FA Cup 4th Round replay at The City Ground on Wednesday night and they are Blues' league game opponents on 14th February.
Should Derby win the replay then a new date for the Palace game wll have to be arranged.