The Magpies' home game against Arsenal at St. James' Park on Saturday, 4th November will now kick-off at 5:30pm GMT instead of 3pm GMT as initially advertised.
And United's trip to Bournemouth's Vitality Stadium on Saturday, 11th November will also now kick-off at 5:30pm GMT, as opposed to 3pm GMT.
Both fixtures will be broadcast live on Sky Sports.
Any further alterations to the Magpies' fixture schedule will be communicated in due course.