What years did the New England Patriots play in the Super Bowl?

Their six superbowls were: 1985 (loss to Chicago Bears), 1996 (loss to Green Bay Packers), 2001 (win over St. Louis Rams), 2003 (win over Carolina Panthers), 2004 (win over Philadelphia Eagles), 2007 (loss to New York Giants) 2012 (loss to New York Giants).

As of the 2008 season, the actual dates played are:

January 26, 1986 - Superbowl XX (vs. Chicago);

January 26, 1997 - Superbowl XXXI (vs. Green Bay);

February 3, 2002 - Superbowl XXXVI (vs. St. Louis);

February 1, 2004 - Superbowl XXXVIII (vs. Carolina);

February 6, 2005 - Superbowl XXXIX (vs. Philadelphia);

February 3, 2008 - Superbowl XLII (vs. New York Giants);

February 5, 2012 - Superbowl XLVI(vs. New York Giants);