The fixtures for the 2012-13 Liga season have been released, revealing the dates for the two derby clashes between Real Madrid and Barcelona.The Blaugrana will entertain Los Blancos in the league season's first Clasico at home on October 7, with the return fixture taking place at the Santiago Bernabeu on March 3.The competition will commence on August 18 and will run through to June 1, with just the penultimate jornada of the scheduled 38 to take place during midweek.The final dates of the tournament may of course be altered should Real Madrid, Barcelona, Valencia or Malaga reach the latter stages of the Champions League.Reigning champions Madrid begin their campaign at home to Valencia while Barcelona will entertain Real Sociedad at Camp Nou.Matchday One:Barcelona Real Sociedad Real Madrid Valencia Athletic Bilbao Real Betis Atletico Madrid Levante Real Zaragoza Valladolid Sevilla Getafe Celta Vigo Malaga Rayo Vallecano Granada Deportivo La Coruna Osasuna Mallorca Espanyol