OZZFEST MEETS KNOTFEST–the biggest metal festival in North America EVER–will celebrate two historic moments in the festival headliners’ careers with one-day sales on Saturday, August 20 (Ozzfest) and Friday, August 26 (Knotfest).

First up, this Saturday, August 20, for 20 hours (from 4:00 AM-12 midnight, PT), a single day GA OZZFEST ticket will be available for $20 in honor of the festival’s 20th anniversary. Created as a two-day event in 1996 by Sharon and Ozzy Osbourne, OZZFEST was the first national music festival of its kind dedicated to hard rock music and breaking new artists. In the years that followed, it became one of the most successful touring packages in music history.

“It’s just unbelievable to me that it’s been 20 years since the first Ozzfest,” says Ozzy Osbourne. “We’re really looking forward to bringing Ozzfest back to its birthplace in San Bernardino.”

And…to honor the 15th anniversary of the release of Slipknot’s Grammy-nominated and critically acclaimed album IOWA, KNOTFEST is offering a special $15 GA Ticket for 15 hours on Friday, August 26. The special $15 (plus fees) for 15 hours–which celebrates the album Rolling Stone said makes “nearly everything else in modern doom rock sounds banal'”–will take place Friday August 26th from 9:00 AM-11:59PM (PT).

The Live Nation-produced OZZFEST MEETS KNOTFEST is set for Saturday, September 24 (OZZFEST) and Sunday, September 25 (KNOTFEST) at San Manuel Amphitheater and Festival Grounds in San Bernardino, CA. Updated line-ups for OZZFEST MEETS KNOTFEST, along with details on all ticketing and camping options can be found at OZZFEST.COM and KNOTFEST.COM.