With Bono's recent back problems now behind him Irish super group U2 have just rescheduled the dates for their North American 360 tour for Spring/Summer 2011 with all tickets valid for the new performance dates, their concert promoter said today.

The North American leg will kick off on May 21 next year at Invesco Field in Denver and end on July 23, 2011 in Minneapolis. The 2010 European tour will begin on time on August 6, 2010 in Turin.

The North American tour dates were canceled and U2 missed a date with Glastonbury music festival after frontman Bono underwent emergency surgery on his back in May.

'Following Bono's recovery from recent back surgery, U2 are now readying themselves for the opening of their European Tour,' the band's concert promoters Live Nation said in a statement.

Meanwhile Adam, Larry, Edge and Bono have filmed a message for everyone at Web site u2.com on the eve of their return to say: 'Thank you for standing by us.'

U2's legendary manager Paul McGuinness also thanked the band's fans for their ongoing support.

'We're delighted the dates are rescheduled and in all the same venues we originally planned to play,' he told the press. 'Above all we want to thank the U2 fans for bearing with us. They're the best and the band wants to get back to where they belong, surrounded by their audience.'

The 50-year-old singer's injury was a blow to the band and the millions of fans who were hoping to see U2 this year on the second leg of their world U2 360 Tour.

The 2009 part of the U2 tour helped the band earn $109 million last year, according to music journal Billboard.