Green Day is canceling the rest of its 2012 club schedule and is postponing the start of the 2013 arena tour.

Bass player Mike Dirnt says Billie Joe Armstrong’s “well-being is our main concern” in the band’s decision to clear the schedule through Feb 8.

He says in a statement Monday that Armstrong is doing well in his attempt to shake substance abuse problems that emerged publicly in September when the singer-guitarist had a profane meltdown on the stage of the iHeartRadio Music Festival in Las Vegas.