We've found these great pictures of Chesterfield FC fans dancing the night away in the town's former Bradbury nightclub in 1997.
That was the year the third-tier side gave Premier League Middlesbrough the fright of their lives in a thrilling 3-3 FA Cup semi-final at Old Trafford.
And if Jonathan Howard's shot – which appeared to cross the line after hitting the bar – had not been ruled out, the Spireites could have faced Chelsea in the FA Cup final at Wembley.
Middlesbrough won the replay 3-0 but went on to lose the final and suffered relegation from the Premier League.
We've also found pictures of jubilant fans returning home after the 3-3 draw on April 13.