Dragons will kick off the region’s European Challenge Cup campaign in November - with full fixture information available in August.
Dean Ryan’s men will this season play in Pool 1 alongside Castres Olympique, Worcester Warriors and Enisei-STM.
And the Road to Marseille starts on 15 November with the opening round of Pool Stage matches, with Round 2 getting under way on 22 November.
Rounds 3 and 4 will take place on the weekends of December 6 and 13, while the Pool Stage will be concluded in the second and third weekends of January 2020.
The Stade de Marseille will host the Challenge Cup final on Friday, 22 May and the Heineken Champions Cup final on Saturday, 23 May.
Further fixture information will be available in early August after the publishing of calendars for the three professional domestic leagues – the Guinness PRO14, Gallagher Premiership, and TOP 14.
2019/20 Challenge Cup pools
Pool 1: Castres Olympique, Worcester Warriors, Dragons, Enisei-STM
Pool 2: Scarlets, RC Toulon, London Irish, Bayonne
Pool 3: Wasps, Edinburgh Rugby, Bordeaux-Bègles, Agen
Pool 4: Stade Français Paris, Bristol Bears, Zebre Rugby Club, Brive
Pool 5: Cardiff Blues, Leicester Tigers, Pau, Rugby Calvisano
EPCR weekends – 2019/20 season
Round 1: 15/16/17 November 2019
Round 2: 22/23/24 November 2019
Round 3: 6/7/8 December 2019
Round 4: 13/14/15 December 2019
Round 5: 10/11/12 January 2020
Round 6: 17/18/19 January 2020
Quarter-finals: 3/4/5 April 2020
Semi-finals: 1/2/3 May 2020
2020 finals – Stade de Marseille
Challenge Cup final – Friday 22 May
Heineken Champions Cup final – Saturday 23 May