Yes, they’ve gotten back together before, but this time it will be all four original members — including, of course, Ozzy Osbourne, who hasn’t recorded with the band since 1978. The reunion will include a new album, to be produced by Rick Rubin and due out sometime in fall 2012, as well as a worldwide tour kicking off next summer. If you need a little fanfare with your reunion news, please know that the band announced all this at 11:11 today (which, if you hadn’t noticed from the various corduroy jokes, is 11-11-11. It’s also apparently National Metal Day. Happy Metal Day! Here’s a video to celebrate.)