Leinster and Ulster will do battle under the Friday night lights in their Pro12 semi-final play-off, while Connacht will face off with Glasgow Warriors again the following evening.
Leo Cullen's men trounced Treviso 50-19 to ensure they will have home advantage in two weeks' time. Ulster secured their place in the play-offs with an entertaining 46-26 win against Ospreys at the Liberty Stadium.
Connacht edged past Glasgow Warriors 14-7 at a rain-soaked Sportsground and will hope for a repeat performance when the Scottish side return for a Satruday evening showdown.
The final will take place on Saturday 28 May at Murrayfield (5.30pm).
Pro12 play-off semi-finals
Friday 20 May: Leinster v Ulster, RDS Arena (7.45pm)
Saturday 21 May: Connacht v Glasgow Warriors, The Sportsground (6.30pm)