Guinness has been announced as the Pro12's new sponsor for the 2014-15 season, replacing RaboDirect.
The announcement was made along with fixture details for the forthcoming campaign.
Scarlets host Ulster on the opening weekend of 5-7 September, while Newport Gwent Dragons travel to Connacht, Ospreys host Treviso and Cardiff Blues are at Zebre.
Champions Leinster travel to beaten finalists Glasgow in the first round.
The Welsh regions' festive fixtures, which traditionally draw their biggest crowds of the season, begin with Blues v Scarlets on the weekend of 19-21 December.
Dragons travel to Blues and Ospreys host Scarlets in the 26-28 December round of games.
Those fixtures will be followed by Dragons v Blues and Scarlets hosting Ospreys on 2-4 January, 2014.