Hibs and Hearts have both had league matches moved to Friday nights for live television broadcasts.
Hibs' trip to Tannadice to face Dundee United in the Ladbrokes Championship, due to take place on Saturday, December 3, will now kick off at 7.45pm on Friday, December 2. BT Sport will show the game live.
And the return match with the Arabs at Easter Road will now take place on Friday, January 6 (7.45pm), the match being broadcast live on BBC ALBA.
And the Hibees’ away match against Morton on Saturday, December 17 is also on ALBA, now kicking off at 5.15pm.
BT will also broadcast Hearts' home Premiership encounter against Aberdeen at 7.45pm on Friday, December 30. That game was originally scheduled for the following day.
Hearts' home game against Kilmarnock has also been moved from Wednesday, December 28, to Tuesday, December 27 (kick-off TBC), although there will be no live broadcast of that fixture.