The Magpies' trip to the Hawthorns will now be played on Sunday, 7th March with a 12 noon (GMT) kick-off, and will be shown live on Amazon Prime Video.
Meanwhile, the game at the Amex Stadium will remain on Saturday, 20th March, but kick-off moves to 8pm (GMT) and the game will be broadcast live by Sky Sports.
The selection of Newcastle United's home game against Aston Villa - currently scheduled for 3pm (GMT) on Saturday, 13th March - will be announced in due course.
Earlier this week, the Premier League confirmed that all fixtures for the 2020/21 season will continue to be made available to fans to watch live in the United Kingdom, via existing broadcast partners Sky Sports, BT Sport, Amazon Prime Video and BBC.
This arrangement will be extended until Government guidance permits supporters to return to stadiums.