It's in the Heineken Champions Cup competition.
Leinster and Ulster's Heineken Champions Cup last-16 tie will be played at the Aviva Stadium on Saturday, the 1st of April.
The EPCR has confirmed the kick-off details for the eight knockout matches - that game will start at 5.30
Munster's game away to the Sharks in Durban's on the same day and kicks off at 12.30 Irish time.
Connacht's Challenge Cup last-16 tie away to Benneton has been confirmed for 3pm Irish time - also on the Saturday.

Kildare Beaten in Added Time!
Crystal Palace Set To Lose Their Manager And Captain
Three Changes To Connacht Team Ahead Of Tomorrow's Clash With Montauban
Ulster Name Challenge Cup Team To Face Stade Francais
Munster Captain Tadgh Beirne To Make His 100th Appearance In Tomorrow's Game
Eight Changes To Leinster Team Ahead Of Tomorrows Champions Cup Clash
Kildare Senior Hurling Panel To Play Kilkenny On Sunday Announced
Kildare Senior Football Team Announced