Leinster remain unbeaten in their Investec Champions Cup campaign after two games.
The province needed a strong second-half performance to see off Leicester Tigers in a 23-15 win at Welford Road.
This evening, Munster will look to bounce back from a heavy defeat to Bath last weekend.
The Men in Red face Gloucester at Páirc Uí Chaoimh from half 5.
The other two Irish provinces are in Challenge Cup action later.
Connacht host Black Lion in Galway from 8, while at the same time, Ulster are away to Cardiff.
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St Mary's and Clontarf are level on points at the top of Division 1A ahead of tomorrow's Energia All-Ireland League action.
Leaders Mary's welcome Lansdowne to Templeville Road from half 2,
While there's a 4 o'clock start when Clontarf face Ballynahinch at Castle Avenue.
Also at half 2, Old Belvedere entertain Terenure College,
A provincial derby sees bottom side Nenagh Ormond go to Young Munster,
While Cork Con are the visitors to UCD.
