Munster host Zebre in the URC later, hoping to avoid four defeats in a row at Thomond Park.
That's underway at half 5.
This afternoon, Connacht welcome Glasgow Warriors to Dexcom Stadium for a 3 o'clock kickoff.
They're a quarter-to-8 start to Ulster's trip to Ospreys.
Leinster's 11-game winning run came to an end in the URC last night.
A Luke McGrath try 12 minutes from time brought them to within a point of Cardiff, but the hosts hung on for an 8-7 win.
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St Mary's College hold just a one-point lead at the top of Division 1A in the Energia All-Ireland League, which returns this afternoon.
They go to 2024 champions Cork Con, for a 3 o'clock start at Temple Hill.
Four games get underway at half 2.
Terenure College begin the post-Carlos Spencer era with the visit of Ballynahinch,
Holders Clontarf face UCD in Belfield,
Nenagh Ormond host Lansdowne, while Young Munster travel to Old Belvedere.
