Saturday, October 13
I know stuff!
Since someone's almost certainly going to ask the question, the last time the consensus #1 and #2 teams lost on the same day was September 21, 1996, when #1 Nebraska lost to #17 Arizona State 19-0 and #2 Tennessee lost to #4 Florida 35-29. (Oddly enough, just a few months later the #1 and #2 teams lost their bowls on consecutive nights.)
You heard it here first!
(Information from the ESPN College Football Encyclopedia, which might be the most awesome book of all time. And yes, I am including the Bible.)