Billboard has confirmed with multiple sources, that U2 has postponed the release of a new album & tour until 2015.

The band has recently scheduled additional sessions with producers Ryan Tedder and Paul Epworth (Danger Mouse remains onboard as the project's central producer.) While an Interscope representative maintains that with a release date never announced the album shouldn't be considered delayed, Billboard has learned that the tour, initially on track for a mid-March announcement and September start date, will now begin in summer 2015.

"It seems to be taking longer for them to finish an album as they get older, but the great thing about U2 is that the whole of a record is always better than the sum of its parts," says a source close to the project. "That magic that the band always seems to capture ... they have yet to capture it."