City's festive trip to Doncaster Rovers will now take place on Friday December 22, and get underway from 7.45pm.
Graham Alexander's men will visit the Eco-Power Stadium in a clash originally scheduled to take place on Saturday December 23 (3.00pm).
The Bantams' final outing before Christmas will now take place one day earlier, following agreements between the two clubs and the EFL.
Full ticketing details will be confirmed in due course.