MVictors has a post on previous Michigan games that have been changed from their original schedule.
M is 4-1 in the games he mentions. The only loss was the 1963 game that included my cousin Barry Dehlin. Barry and his teammates got revenge in Columbus the next season and went on to the 1965 Rose Bowl.
I also remember the Minnesota game in 2003 being moved to a Friday night because the Twins were in the playoffs. That game was the John Navarre transcontinental comeback game. So that brings M's record to 5-1.
Saturday should make 6 wins.