Barcelona's game with Real Madrid at the Nou Camp has been brought forward by a day to April 21, Madrid have confirmed.
The El Clasico clash, which will take place between the two legs of the Champions League semi-finals, has been moved from Sunday to Saturday.
Barcelona travel to Stamford Bridge to face Chelsea in the first leg of their last-four meeting three days earlier on Wednesday April 18, with the return fixture on Tuesday April 24.
Madrid face Bayern in the other semi-final on April 17 and 25.
A statement on Madrid's website read: "Real Madrid will face Barcelona at the Nou Camp on Saturday, April 21 at 2000 in the 35th round of the season."