Wasps will kick-off their defence of the European crown on the weekend of 9 / 10 / 11 November with the Pool stages again being played in three blocks of back-to-back weekends.
Four of the rounds of Pool matches will be played before the end of the year starting in November because of the Rugby World Cup with Rounds 5 and 6 played in mid January 2008.
The knock-out phases will be launched with the quarter-finals on the first weekend of April with the semi-finals three weeks later and both European finals to be played on weekend of 23 / 24 / 25 May.
The Blues will be Wales number 2 seed in the draw, after finishing in second place in the Magners League.
HEINEKEN CUP / EUROPEAN CHALLENGE CUP 2007 / 2008 WEEKENDS
ROUND 1: 9 / 10 / 11 November, 2007
ROUND 2: 16 / 17 / 18 November, 2007
ROUND 3: 7 / 8 / 9 December, 2007
ROUND 4: 14 / 15 / 16 December, 2007
ROUND 5: 11 / 12 / 13 January, 2008
ROUND 6: 18 / 19 / 20 January, 2008
QUARTER-FINALS: 4 / 5 / 6 April, 2008
SEMI-FINALS: 25 / 26 / 27 April, 2008
EUROPEAN CHALLENGE CUP FINAL
& 13th HEINEKEN CUP FINAL: 23 / 24 / 25 May, 2008