Leinster kick-off their latest Champions Cup bid at the Aviva Stadium against Bath on Saturday, December 11.
EPCR have released the dates and times for the first four rounds of the tournament, with Leinster and Connacht at home on the first weekend, and Munster and Ulster drawn away.
Leinster welcome Bath to the Aviva Stadium on the Saturday in an encounter scheduled for a 3.15pm kick-off, with Connacht hosting Stade Francais at 1pm a day later.
Ulster face the toughest assignment on that Saturday as they will face Clermont at the Parc des Sports Marcel Michelin.
Connacht are at home to Stade Francais the following day, while Munster travel to face Wasps at the Coventry Building Society Arena.
Friday nights in France also loom large on the agenda for the provinces - Leinster travel to face Montpellier on Friday, December 17 and Munster will be in Castres for a Friday night clash on January 14.
Toulouse begin their Champions Cup defence away to Cardiff Blues.
BT Sport in the UK and Ireland, and beIN SPORTS in France, will broadcast each of the 48 Heineken Champions Cup pool matches live, and that coverage will be complemented by free-to-air transmission of key fixtures in each round by Channel 4 and Virgin Media in the UK and Ireland, and by France Télévisions in France.
Ireland provinces in Champions Cup action
Saturday, December 11 : Leinster v Bath, Aviva Stadium, 3.15; Clermont Auvergne v Ulster, Stade Marcel-Michelin, 5.30;
Sunday, Dec 12: Connacht v Stade Francais, Sportsground, 1.0; Wasps v Munster, Coventry Building Society Arena, 3.15;
Friday, Dec 17 : Montpellier v Leinster, GGL Stadium, 8.0; Ulster v Northampton, Kingspan Stadium, 8.0;
Saturday, Dec 18: Munster v Castres, Thomond Park, 8.0;
Sunday, Dec 19: Leicester v Connacht, Welford Road, 1.0;
Friday, January 14: Castres v Munster, Stade Pierre Fabre, 8.0;
Saturday, January 15: Connacht v Leicester, The Sportsground, 3.15;
Sunday, January 16: Leinster v Montpellier, RDS, 1.0; Northampton Saints v Ulster, Franklin's Gardens, 3.15;
Saturday, January 22: Bath v Leinster, The Rec, 1.0; Ulster v Clermont, Kingspan Stadium, 5.30
Sunday, January 23: Stade Francais v Connacht, Stade Jean Bouin, 1.0; Munster v Wasps, Thomond Park, 3.15;
Round of 16 (1st leg) and Challenge Cup Round 5 – 8/9/10 April 2022
Round of 16 (2nd leg) and Challenge Cup Round of 16 – 15/16/17 April 2022
Quarter-finals – 6/7/8 May 2022
Semi-finals – 13/14/15 May 2022
EPCR Challenge Cup final – Friday 27 May 2022; Stade Vélodrome, Marseille
Heineken Champions Cup final – Saturday 28 May 2022; Stade Vélodrome, Marseille
