Green Day to Resume Touring The touring hiatus to allow Green Day's singer and guitarist Billie Joe Armstrong to begin treatment for substance abuse will end in March, the band said Monday in a posting on its Web site. The 10-city tour will begin in Chicago on March 28, with stops in Pittsburgh, Philadelphia and Toronto before it winds up in Quebec City on April 12. Included is a stop at Barclays Center, in Brooklyn, on April 7. The group's problems began in late September at the iHeart Radio Music Festival, when Mr. Armstrong stopped in mid-song, smashed his guitar and issued a profanity-laden complaint about the festival and its sponsors over the length of the band's set. Now, Mr. Armstrong has posted a note on Instagram, thanking fans, friends and family for their support. "I'm getting better every day," he said. So now, without further ado, the show must go on. The band said that people who had tickets for shows in the 10 cities on the coming tour could use them on the new dates. Holders of tickets for shows on the original tour that have been canceled would get refunds.