The Day I Went Mad is the sixth solo album by English rock singer Graham Bonnet, originally released in 1999. Much like his previous solo efforts, Bonnet enlisted a host of guest musicians for the recording, including former Guns N' Roses guitarist Slash, Def Leppard guitarist Vivian Campbell and Vanilla Fudge bassist Tim Bogert. The album cover was illustrated by guitarist Mario Parga, who plays on several tracks.