It happened on 4-27 and 4-28 in NHL Playoff History

April 27, 1994

Buffalo Sabres center Dave Hannan scored at 5:43 of the fourth overtime period in a 1-0 home win over the New Jersey Devils in Game Six of their Eastern Conference Quarter-final series. This game was the sixth (now ninth) longest in NHL history, beginning at 7:39 p.m. and concluding at 1:51 a.m.—six hours and 12 minutes later. Sabres goaltender Dominik Hasek turned aside all 70 of the shots he faced, while New Jersey netminder Martin Brodeur made 49 saves on 50 shots.

April 27, 1998

The St. Louis Blues tallied four power-play goals in a span of 3:07 during the third period of a 4-3 win over Los Angeles in Game Three of their Western Conference Quarter-final. The four fastest power-play goals by one team in NHL history were scored by Pascal Rheaume (9:59), Brett Hull (11:03), Pierre Turgeon (11:59) and Terry Yake (13:06).

April 28, 1996

A sold-out crowd at the Winnipeg Arena said good-bye to the Winnipeg Jets following a 4-1 loss to the Detroit Red Wings in Game Six of their Western Conference Quarter-final series. It marked the final game for the Jets before moving to Phoenix and becoming the Coyotes.

Source: NHL Media Release