PARIS, FRANCE - AUGUST 26: Billie Joe Armstrong from Green Day performs at Rock En Seine Festival 10th Anniversary on August
David Wolff - Patrick

Green Day have cancelled their 2012 tour dates and postponed their scheduled shows in January and February of next year. The cancellations and postponements are related to frontman Billie Joe Armstrong's current stint in rehab.

"Obviously the timing for this isn't ideal, but Billie Joe's well-being is our main concern," said bassist Mike Dirnt said in a press release.  "We are happy to say that Billie Joe is doing well, and we want to thank you all for the outpouring of support and well wishes that we have received, and we can't wait to see you all again soon."

But before you get all bummed out, Green Day fans, there's some good news, too; the band moved up the release date of their next album, Green Day ¡Tré!, to December 11, 2012 from its original date of January 15, 2013.

"We feel bad we have to delay our tour, so to make up for it we want to give our fans the music earlier than we had planned," said drummer Tré Cool.  "If we couldn't be there to play it for you live, the least we could do was give you the next best thing."

Earlier this fall, Green Day cancelled their appearance at last weekend's 2012 Voodoo Music Experience festival in New Orleans, although the band received a touching tribute from Metallica, who replaced the pop punk trio.