Without a shadow of a doubt, it's Game 6 of the 2001 Calder Cup Finals.
Saint John's second-ever trip to the Finals, first season with 100 points or more, and earlier that season they had a season ticket drive to keep the team for two more years. I honestly can't even put into words how amazing it was to be there for that game and to finally see my favorite, home-town team win it all.
Only 4 players from that team are playing in the NHL today: Blair Betts, Steve Begin, Steve Montador, and Chris Clark.