The Celtic League fixture list for 2005-06 has been announced with champions Ospreys opening the defence of their title with the visit of Leinster on the first weekend in September.
Glasgow Warriors start their campaign at Hughenden against Newport Gwent Dragons.
Edinburgh Gunners and Border Reivers both travel away to face Llanelli Scarlets and Munster respectively, while Connacht are at home to Cardiff Blues.
The Autumn Test window in November is free of Celtic League fixtures as are the RBS 6 Nations weekends in 2006.
And that means each nation will have their full complement of international players such as Chris Paterson (Gunners), Jon Petrie (Warriors), Chris Cusiter (Reivers), Brian ODriscoll (Leinster) and Gavin Henson (Ospreys) available for selection.
Celtic League director David Jordan said: ''We are delighted to announce such a competitive fixture list, with European Cup qualification at stake for all the Irish, Scottish and Welsh clubs, and we look forward to some super Celtic rugby over the coming months.''