With confirmation of the four Welsh Derby matches over the festive Christmas/New Year Period, the broadcast schedule for RaboDirect PRO12 games up to round 13 can now be finalised.
S4C will be hosting the following games: Ospreys v Scarlets, Wednesday 26 December, kick off 5.30pm, and Newport Gwent Dragons v Ospreys, Monday 31 December, kick off 7.05pm.
BBC Wales will host the other two Welsh fixtures, that is Cardiff Blues v Scarlets, Friday 21 December, kick-off 7.05pm and Cardiff Blues v Newport Gwent Dragons, Wednesday 26 December kick-off 2.05pm.
In order to accommodate this the Round 11 and 21 fixtures involving Cardiff Blues and Scarlets will be reversed, with Blues now at home in December and Scarlets at home in April.
In addition Ospreys have confirmed that they will play their Round 7 fixture against Connacht on Saturday 27 October, kicking off at 2.30pm at the Liberty Stadium.