Bath's Champions Cup match at European champions Toulon will be played on the weekend of 8-10 January.
The game, along with five other Champions Cup and European Challenge Cup matches, was postponed following the Paris terrorist attacks.
The Aviva Premiership, Top 14 and Guinness PRO12 matches involving the affected clubs which had been due to take place in the second weekend of January will be re-scheduled for later in the season.
The exact dates and kick-off times of the five Champions Cup fixtures and one Challenge Cup match will be announced in due course.
Postponed matches to be rescheduled on 8/9/10 January:
Champions Cup - Round 1:
Oyonnax v Ulster Rugby
Racing 92 v Glasgow Warriors
Bordeaux-Bègles v Clermont Auvergne,
Toulon v Bath
Round 2:
Stade Francais v Munster Rugby
Challenge Cup - Round 1:
Pau v Castres Olympique