The Celtics only have one other victory on this date (they're 2-3 on May 28) but it also came during the Big Three era:
May 28, 2008: Kevin Garnett (33 points) and Ray Allen (29 points) carry the load as Boston edges the Detroit Pistons 106-102 in Game 5 of the Eastern Conference Finals. The C's finish the Pistons off in Game 6 to advance to the Finals.
Danny Ainge scored 15 points in the first quarter to set the tone, but backup forward Scott Wedman was the hero in this one, going a perfect 11-for-11 from the floor to score 26 points off the bench.
As for the Lakers? Star big man Kareem Abdul-Jabbar scored just 12 points and actually apologized to his teammates after the 34-point rout, which at the time was the most lopsided result in Celtics-Lakers history.
The Pistons had possession and all hope seemed lost for Boston, until Bird read Isiah Thomas' eyes and stole the Pistons guard's inbound pass intended for Bill Laimbeer.
In one fluid motion, Bird corralled the ball, tip-toed the sideline and fired a pass to teammate Dennis Johnson, who converted the game-winning layup. Ballgame: Celtics 108, Pistons 107.
Bird's steal helped save the series for the Celtics, who lost Game 6 in Detroit but returned home to win Game 7 at the Boston Garden and advance to the 1987 NBA Finals.
Here are two other notable May 26 performances from the C's, who are 4-2 all-time in games played on this date:
May 26, 2012: Rajon Rondo becomes just the second player in Celtics history (after Bird) to record a Game 7 triple-double, tallying 18 points, 10 rebounds and 10 assists as Boston defeats the Philadelphia 76ers in the Eastern Conference Semifinals.
May 26, 1988: The Celtics win another thriller over the Pistons, this time a 119-115 double-overtime victory in Game 2 of the 1988 East Finals. Robert Parish leads all scorers with 26 points and adds 11 rebounds.