The fixture has been moved from 5th April, due to Barnsley's FA Cup Semi-Final the following day.
It will now be on Tuesday 15th April, after the game with QPR (home) and before the final three games of the season against Sheffield United (away), Crystal Palace (home) and finally Ipswich (away) on the last day. That game at Portman Road could also be shown live on TV, with Sky Sports showing the most important matches with relevance to promotion and relegation.
It means three of City's last four games will be away from home.
Kick-off at Oakwell will be at 7:45pm.