The Magpies were initially set to head to Stamford Bridge for the second time this season on Saturday, 9th March, having earlier faced the Blues in the capital in December's Carabao Cup quarter-final, which Mauricio Pochettino's side won on penalties.
But Eddie Howe's men will now travel to the capital for a league clash two days later than initially scheduled, with the game now set to kick-off at 8pm GMT on Monday, 11th March and be broadcast live on Sky Sports.
And United's home game against the Hammers at St. James' Park on Saturday, 30th March will still be played on that date, but will now kick off at 12:30pm GMT instead of 3pm GMT. That game will be shown live on TNT Sports.
The Magpies’ away game at Crystal Palace is currently scheduled for Saturday, 16th March - but that fixture at Selhurst Park could also be rescheduled if United beat Blackburn Rovers in their FA Cup fifth round clash later this month.
Any further alterations to United's fixture schedule will be confirmed in due course.