The fixtures for Rounds 5 and 6 in both tournaments will also be released, with the exact dates and kick-off times confirmed at a later stage.
NB The date for the announcement of the first four rounds of the 2013/14 Amlin Challenge Cup fixtures will be confirmed shortly.
2013/14 European club weekends
Round 1 - 10/11/12/13 October 2013
Round 2 - 17/18/19/20 October 2013
Round 3 - 5/6/7/8 December 2013
Round 4 - 12/13/14/15 December 2013
Round 5 - 9/10/11/12 January 2014
Round 6 - 16/17/18/19 January 2014
Quarter-finals - 3/4/5/6 April 2014
Semi-finals - 25/26/27 April 2014
Amlin Challenge Cup final - Cardiff Arms Park; Friday, 23 May 2014 (20.00)
Heineken Cup final - Millennium Stadium; Saturday, 24 May 2014 (17.00)
2013/14 Heineken Cup pools
Pool 1 Leinster Rugby, Northampton Saints, Ospreys, Castres Olympique
Pool 2 Toulon, Cardiff Blues, Glasgow Warriors, Exeter Chiefs
Pool 3 Toulouse, Saracens, Connacht Rugby, Zebre
Pool 4 ASM Clermont Auvergne, Harlequins, Scarlets, Racing Metro 92
Pool 5 Ulster Rugby, Leicester Tigers, Montpellier, Benetton Treviso
Pool 6 Munster Rugby, Perpignan, Edinburgh Rugby, Gloucester Rugby