The kick-off has also changed from 19:30 GMT to 18:00. It will be shown live on BT Sport.
Crystal Palace v West Ham
- Tuesday, 26th January
- 18:00 GMT
- Selhurst Park
- BT Sport
The Eagles are looking to extend their recent unbeaten record against the Hammers - beating them 2-1 both home and away in 2019/20 and drawing 1-1 earlier this season.
The rearranged date gives them three days' rest rather than two before facing Wolverhampton Wanderers on Saturday 30th.