That was WrestleMania XII where Breat Hart & Shawn Michaels had their classic IronMan match.
WrestleMania I happened on 1985-03-31.
WrestleMania XXVII happened on 2011-04-03.
WrestleMania IV happened on 1988-03-27.
WrestleMania XI happened on 1995-04-02.
WrestleMania XX happened on 2004-03-14.
WWF Road to WrestleMania happened in 2001.
WrestleMania V happened on 1989-04-02.
WrestleMania X happened on 1994-03-20.
WWF WrestleMania Challenge happened in 1990.
WrestleMania XXVIII happened on 2012-04-01.
WWE WrestleMania XIX happened in 2003.
WWE Legends of WrestleMania happened in 2009.