The league will be decided by a cup format this season and the teams, who were only separated by a point in the regular-season table, will lock horns in what should be an entertaining game, given the attacking style of rugby played by both sides.
Creggs finished top of the regular season table by a point, boasting a similar record – six wins and one loss in seven games – to Connemara but pipping them by virtue of a losing bonus point in their solitary defeat.
The top two in the table – thanks to the new format – were given home semi-finals against Westport and Buccanneers and they did the necessary to book their place in the league showpiece, in a repeat of the 2019 Junior Cup final.
The Galway Roscommon border club defeated Westport 27-25 in their semi-final and the Blacks beat Buccaneers 34-10 in Clifden.
Meanwhile, Ballinrobe and Dunmore will get the ball rolling on the day in the Bank of Ireland J1B final, which kicks off at 1 PM.
Ballinrobe finished their season with a perfect record, winning all seven of their games, and will look to finish their table-topping campaign off with some silverware, after rubberstamping their route to the final with a 17-3 win over Corinthians in their semi-final.
Dunmore, who finished second in the J1B table – with four wins and three losses in their seven outings – defeated NUIG 18-9 in their semi-final and will look to cause an upset in the clash of first versus second in the regular-season table.