January 23, 1950 - NFL rule changes which according to the sportattic.com were unlimited free substitution was restored, opening the way for the era of two platoons and specialization in pro football such as offense, defensive and special team specialist.
January 23, 1953 - At the NFL owners meeting the successful sale of the franchise that would become the reincarnation of a Baltimore franchise took just over four weeks as Carroll Rosenbloom became the principal owner of the new Baltimore Colts and absorbed many of the defunct Dallas Texans team. (look back at the December 28 History headlines). Also decided at this meeting was that the NFL's National & American conference would become Eastern & Western conferences.
January 23, 1978 - Tampa Stadium - At the NFL Pro Bowl the NFC squad edges out the AFC, 14-13. The game’s MVP was Chicago Bears running back Walter Peyton. According to the Tampa Sport History Blogspot the game was broadcast nationwide on ABC and called by the renowned “Monday Night Football” crew of Frank Gifford, “Dandy” Don Meredith and Howard Cosell.
January 23, 1983 - Miami’s Orange Bowl - The New York Jets in the early 1980s were a team built on speed. The worst thing that could have happened to a team of that nature is to have it rain for days on end on a southern Florida natural playing surface, and unfortunately for the Jets it did occur according to a News Day Article. The game has gone down in the annals of NFL history as the "Mud Bowl." The wet, muddy field negated the Jets significant speed and skill advantage and the Miami Dolphins benefitted as they blanked the New York Jets 14-0 in the AFC Championship Game to advance to the Super Bowl.
January 23, 1994 - Rich Stadium, Orchard Park, New York - The 1993 season’s AFC Championship game saw the passing offenses almost nullified by the defenses, Bills Running back Thurman Thomas thrived with 186 yards on the ground and 3 touchdowns as the Buffalo Bills beat the Kansas City Chiefs, 30-13 to advance to Super Bowl XXVIII.
January 23, 1994 - Texas Stadium, Irving - Dallas Cowboys punched their tickets into Super Bowl XXVIII to face the Buffalo Bills as they knocked off the San Francisco 49ers, 38-21 in the NFC Championship game.
January 23, 2000 - Alltel Stadium, Jacksonville - Some new names were found in the AFC Championship in the new millennium as the Tennessee Titans beat Jacksonville Jaguars, 33-14 per the Pro-Football-Reference.com. Titans Quarterback Steve McNair had almost as many yards rushing, 91 with three TDs as he did passing, 14 of 23 for 112 yards. With the victory Tennessee earned the right to play in Super Bowl XXXIV.
January 23, 2000 - A defensive battle ensued in the 1999 season’s NFC Championship game played at the Trans World Dome, St. Louis per the Pro-Football-Reference. The St. Louis Rams outscored the Tampa Bay Buccaneers, 11-6 to advance to Super Bowl XXXIV to face the Titans.
January 23, 2005 - Heinz Field, Pittsburgh - The New England Patriots ruined the party for the Pittsburgh Steelers as they handily defeated them 41-27 in the AFC Championship game. Patriot wide out Deion Branch scored twice as New England won the Lamar Hunt Trophy.
https://www.pro-football-reference.com/boxscores/200501230pit.htm
January 23, 2005 The Philadelphia Eagles knocked around the Atlanta Falcons, 27-10 in the NFC Championship played at Lincoln Financial Field in Philly. Chad Lewis caught two Donovan McNabb passes to help the Eagles advance to Super Bowl XXXIX per the Pro-Football-Reference.
January 23, 2011 - Heinz Field, Pittsburgh - The AFC Championship game had Steelers running back Rashard Mendenhall ran 27 times for 121 yards and scored once to help the Pittsburgh Steelers overcome the New York Jets, 24-19 per an ESPN.com story.
January 23, 2011 - The NFC Championship played at Soldier Field in Chicago was a matchup of two long time NFC North rivals. In the game for the right to play in the Super Bowl, it was the Green Bay Packers knocking out the Chicago Bears, 21-14.