The full March schedule has been published by the Premier League and it features those two date changes for Ole Gunnar Solskjaer's Reds.
The top-flight derby at Old Trafford was originally set for Saturday 7 March but it has now moved to Sunday 8 March at 16:30 GMT.
A week later, United's first visit to the impressive Tottenham Hotspur Stadium has been pushed back from Saturday 14 March to the following day, again at 16:30 GMT.
ELSEWHERE IN MARCH
Our month is scheduled to start with a game at Everton's Goodison Park on Sunday 1 March, with kick-off at 14:00 GMT.