The Irish frontman explained that the band "genuinely loved" their latest two-year '360° Tour', but they are now looking to rest in the immediate future.
Speaking at the GQ Men of the Year Awards, Bono told Metro: "They say every tour is ten days too long. Not with this one. We genuinely loved every single night and at the end we were so sad.''
While accepting U2's award for 'Best Band', he added: "Growing up is not what is meant to happen to a rock band. It has happened, we are now men."
Bono recently dismissed reports that he suffered a heart scare during their latest tour.
> U2 need to ditch the politics and write a good album, say The Drums
Watch the video for U2's 'Get On Your Boots' below: