The Magpies had been set to welcome the Gunners to St. James' Park on Saturday, 27th September, with kick-off set for 3pm BST.
But now, with the match having been picked to be broadcast live on Sky Sports, the game will take place a day later on Sunday, 28th September, with kick-off on Tyneside set for 4:30pm BST.
Any further changes to the Magpies' fixture schedule will be communicated at the earliest opportunity.