Forest go into the game against their East Midlands rivals, who can also pinch a top-six spot with victory, in seventh place and outside the play-off positions on goal difference.
Davies' side must better Bolton's result against Blackpool to keep their promotion challenge alive, but victory for the Reds combined with Crystal Palace losing to Peterborough would also seal a top-six berth irrespective of what the Trotters do.
"It's going to be an exciting day and it's going to be a day of celebration, no matter what happens because these players have been absolutely outstanding," said Davies.
"To be one of four teams going into the last day with a chance of still winning promotion is very exciting and it's been a tremendous effort by the players.
"We will try to pick up the three points and do the best we can against a very difficult side but, like I say, we will celebrate whatever happens.
"To just be in this position and be in with a chance of possibly getting into the play-offs is a fantastic achievement."